bump: version 3.0.1

Synchronize version across all files:
- Directory.Build.props → 3.0.1
- compose.yaml → gmrelay-bot/web/discord-bot:3.0.1
- deploy.yml → VERSION: 3.0.1
- NavMenu.razor → v3.0.1
- DiscordProjectStructureTests → 3.0.1

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.env.example

@@ -10,6 +10,17 @@ TELEGRAM_BOT_USERNAME=YOUR_BOT_USERNAME_HERE
 # Используется ботом для кнопки меню Telegram и кнопки /start.
 TELEGRAM_MINI_APP_URL=
 
+# Токен Discord application bot
+# Можно получить в Discord Developer Portal (https://discord.com/developers/applications)
+DISCORD_BOT_TOKEN=YOUR_DISCORD_BOT_TOKEN_HERE
+
+# Discord OAuth (для Web Dashboard)
+# Client ID и Secret из OAuth2 раздела Discord Developer Portal
+# Redirect URI должен указывать на /auth/discord/callback вашего домена
+DISCORD_CLIENT_ID=YOUR_DISCORD_CLIENT_ID_HERE
+DISCORD_CLIENT_SECRET=YOUR_DISCORD_CLIENT_SECRET_HERE
+DISCORD_REDIRECT_URI=https://your-domain.example/auth/discord/callback
+
 # Пароль для базы данных PostgreSQL
 POSTGRES_PASSWORD=StrongPasswordForDatabase
 

.gitea/workflows/deploy.yml

@@ -6,7 +6,7 @@ on:
       - main 
 
 env:
-  VERSION: 2.4.0
+  VERSION: 3.0.1
 
 jobs:
   # ЧАСТЬ 1: Собираем образы и кладем в Gitea (чтобы делиться с ребятами)
@@ -113,14 +113,47 @@ jobs:
           echo "DISCORD_BOT_TOKEN=${{ secrets.DISCORD_BOT_TOKEN }}" >> .env
           echo "TELEGRAM_BOT_USERNAME=${{ secrets.TELEGRAM_BOT_USERNAME }}" >> .env
           echo "TELEGRAM_MINI_APP_URL=${{ secrets.TELEGRAM_MINI_APP_URL }}" >> .env
+          echo "DISCORD_CLIENT_ID=${{ secrets.DISCORD_CLIENT_ID }}" >> .env
+          echo "DISCORD_CLIENT_SECRET=${{ secrets.DISCORD_CLIENT_SECRET }}" >> .env
+          echo "DISCORD_REDIRECT_URI=${{ secrets.DISCORD_REDIRECT_URI }}" >> .env
 
       - name: Deploy Containers
         run: |
           # Авторизуемся локальным докером в нашей Gitea
           docker login git.codeanddice.ru/ -u toutsu -p ${{ secrets.GIT_TOKEN }}
-          
+
           # Pull гарантирует, что мы получили нужную версию.
           docker compose pull bot discord web
-          
+
           # Запускаем! Флаг -d оставит их работать в фоне.
           docker compose up -d
+
+          # Ждём, пока сервисы перейдут в healthy или упадут
+          SERVICES="bot discord web"
+          MAX_WAIT=40
+          INTERVAL=5
+          ELAPSED=0
+
+          while [ $ELAPSED -lt $MAX_WAIT ]; do
+            NOT_HEALTHY=0
+            for svc in $SERVICES; do
+              HEALTH=$(docker compose ps $svc --format="{{.Health}}" 2>/dev/null | head -n1)
+              if [ "$HEALTH" != "healthy" ]; then
+                STATE=$(docker compose ps $svc --format="{{.State}}" 2>/dev/null | head -n1)
+                echo "❌ $svc not healthy yet (state: ${STATE:-unknown})"
+                NOT_HEALTHY=$((NOT_HEALTHY + 1))
+              fi
+            done
+
+            if [ $NOT_HEALTHY -eq 0 ]; then
+              echo "✅ All services are healthy!"
+              exit 0
+            fi
+
+            sleep $INTERVAL
+            ELAPSED=$((ELAPSED + INTERVAL))
+          done
+
+          echo "⏰ Timed out waiting for services to become healthy"
+          docker compose ps
+          exit 1

Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <Version>2.4.0</Version>
+    <Version>3.0.1</Version>
     <TargetFramework>net10.0</TargetFramework>
     <LangVersion>preview</LangVersion>
     <Nullable>enable</Nullable>

PR_DESCRIPTION.md

@@ -0,0 +1,23 @@
+# Discord /newsession и /listsessions — Issue #28
+
+## Что реализовано
+- Slash-команда /newsession для создания игровых сессий прямо из Discord.
+- Slash-команда /listsessions для просмотра предстоящих игр в сервере.
+- DiscordPermissionChecker — проверка прав (owner / admin / manager).
+- DiscordPlatformMessenger — реализация IPlatformMessenger для Discord (NetCord REST).
+- Полная интеграция в DI (Program.cs).
+
+## Архитектура
+- Vertical slice: каждая команда — отдельный файл (Command + Handler).
+- Platform-agnostic SQL: используются колонки platform, external_group_id, external_user_id.
+- Рендеринг переиспользует существующий DiscordSessionBatchRenderer.
+
+## TDD
+- 212 тестов, все зелёные.
+- Source-level тесты проверяют паттерны: Dapper, Npgsql, транзакции, CancellationToken, платформенную нейтральность.
+
+## Версия
+- Minor bump: 2.3.0 → 2.4.0
+- Синхронизировано: Directory.Build.props, compose.yaml, deploy.yml, NavMenu.razor.
+
+Closes #28

README.md

@@ -1,10 +1,10 @@
 # 🎲 GM-Relay: TTRPG Session Scheduling Bot & Web Dashboard
 
-**GM-Relay** — это комплексное решение для Мастеров Подземелий (ГМов), состоящее из высокопроизводительного Telegram-бота и удобного веб-интерфейса. Предназначено для автоматизации записи игроков на сессии, управления расписанием и проведения игр.
+**GM-Relay** — это комплексное решение для Мастеров Подземелий (ГМов), состоящее из высокопроизводительного Telegram-бота, Discord worker и удобного веб-интерфейса. Предназначено для автоматизации записи игроков на сессии, управления расписанием и проведения игр.
 
 Проект разработан с упором на производительность, архитектуру Vertical Slice, Native AOT (для бота) и удобство развертывания с использованием .NET Aspire.
 
-**Текущая версия:** `v2.2.0`.
+**Текущая версия:** `v2.8.0`.
 
 ---
 
@@ -22,7 +22,15 @@
 - **🔔 Уведомления**: Игрок получают за 24 часа, напоминание за 1 час, ссылку перед игрой, отмены и переносы; групповые уведомления при этом остаются.
 - **🕐 Режим уведомлений batch**: Для каждой пачки можно выбрать `В группе и в личку` или `Только в группе`.
 - **⬆️ Управление очередью**: Веб-интерфейс показывает заполненность, лист ожидания и позволяет ГМу поднять первого игрока из очереди.
-- **🔄 Автоматическая синхронизация**: Любые изменения в веб-интерфейсе мгновенно обновляют сообщения с расписанием в Telegram-чатах игроков.
+- **🔄 Автоматическая синхронизация**: Любые изменения в веб-интерфейсе мгновенно обновляют сообщения с расписанием в подключенных Telegram- и Discord-каналах.
+
+### Discord Bot
+- **Slash-команды `/newsession` и `/listsessions`**: GM создаёт сессии и публикует актуальное расписание прямо в Discord-канале.
+- **Кнопки Join/Leave с ephemeral-ответами**: игроки нажимают Join/Leave в Discord-сообщении; бот отвечает ephemeral-сообщением и обновляет schedule message.
+- **RSVP (подтверждения) за 24ч до сессии**: scheduler публикует запрос подтверждения в Discord-канале, игроки отвечают кнопками, а GM получает итоги RSVP.
+- **DM-напоминания за 1ч и ссылки перед игрой**: one-hour reminders и join-link notifications отправляются в Discord DM при включённых личных уведомлениях; сбои DM логируются без публичного fallback.
+- **Reschedule voting (голосование за перенос)**: deadline-сервис обновляет Discord vote message и schedule message через `IPlatformMessenger`.
+- **Лимиты и waitlist**: при заполненном составе игрок попадает в waitlist, а при выходе участника первый ожидающий автоматически продвигается в основной состав.
 
 ### 🌐 Web Dashboard (Blazor Server)
 - **🔐 Авторизация через Telegram**: Telegram Login Widget с HMAC-SHA256 валидацией.
@@ -37,7 +45,7 @@
 - **⬆️ Управление очередью**: Заполненность, лист ожидания и ручное повышение игрока из очереди.
 - **📜 История изменений сессий**: Страница `/session/{id}/history` показывает аудит-лог всех значимых изменений (время, ссылка, название, участники, статус) с указанием акторов и дат.
 - **📊 Статистика посещаемости**: Страница `/group/{id}/stats` показывает долю присутствия, количество пропусков и среднюю явку по каждому игроку группы.
-- **🔄 Автосинхронизация**: Изменения в вебе мгновенно перерисовывают Telegram-сообщения расписания.
+- **🔄 Автосинхронизация**: Изменения в вебе мгновенно перерисовывают platform message расписания через `IPlatformMessenger`.
 
 ---
 
@@ -47,7 +55,7 @@
 |---|---|
 | Язык | C# 14 (.NET 10) |
 | Архитектура | Vertical Slice + общая библиотека `GmRelay.Shared` |
-| Боты | Telegram.Bot (**Native AOT**), NetCord Gateway (Discord worker) |
+| Боты | Telegram.Bot (**Native AOT**), NetCord Gateway (Discord worker внутри `GmRelay.Bot`) |
 | Веб | Blazor Server |
 | Оркестрация | .NET Aspire (`GmRelay.AppHost`) |
 | БД | PostgreSQL |
@@ -77,6 +85,9 @@ TELEGRAM_BOT_TOKEN=ваш_токен_здесь
 # Токен Discord application bot
 DISCORD_BOT_TOKEN=ваш_discord_токен_здесь
 
+# Client ID Discord application (используется для slash-команд)
+DISCORD_BOT_CLIENT_ID=ваш_discord_client_id_здесь
+
 # Имя бота без @ (для Telegram Login Widget)
 TELEGRAM_BOT_USERNAME=ваше_имя_бота_здесь
 
@@ -101,13 +112,15 @@ docker compose up -d
 - создание Docker-сети и volume PostgreSQL;
 - подъём PostgreSQL (`db:5432`);
 - запуск бота с плавной миграцией (DbUp);
-- запуск отдельного Discord Gateway worker на NetCord;
+- запуск Discord Gateway worker на NetCord (healthcheck на `:8082`);
 - запуск веб-приложения с подключением к БД и Telegram API.
 
 ### 3. Первоначальная настройка
 1. Напишите боту `/start`.
 2. Создайте группу через `/newgroup`.
 3. Откройте Mini App или Web Dashboard для расширенного управления.
+4. Для Discord пригласите application bot на сервер с правами `bot` и `applications.commands`. Скопируйте `DISCORD_BOT_TOKEN` и `DISCORD_BOT_CLIENT_ID` в `.env`.
+5. Перезапустите Docker Compose (`docker compose up -d`), а затем в Discord создайте сессию через `/newsession` или опубликуйте расписание через `/listsessions`; игроки записываются и выходят кнопками в опубликованном сообщении.
 
 ## 💾 Backup и восстановление
 
@@ -154,8 +167,7 @@ BACKUP_VOLUME_NAME=game_pgbackups
 ```
 ├── src/
 │   ├── GmRelay.AppHost/         # .NET Aspire orchestrator
-│   ├── GmRelay.Bot/             # Telegram-бот (Native AOT)
+│   ├── GmRelay.Bot/             # Telegram- и Discord-бот (Native AOT + NetCord Gateway worker)
-│   ├── GmRelay.DiscordBot/      # Discord Gateway worker на NetCord
 │   ├── GmRelay.ServiceDefaults/  # Aspire service defaults
 │   ├── GmRelay.Shared/          # Общие доменные модели
 │   └── GmRelay.Web/             # Blazor Server dashboard
@@ -167,6 +179,16 @@ BACKUP_VOLUME_NAME=game_pgbackups
 
 ---
 
+## 👨‍💻 Для разработчиков
+
+- **Архитектура**: проект следует Vertical Slice с явным DI. Подробности — в [ADR-001](docs/adr/0001-use-vertical-slice-native-aot-and-aspire.md) и [ADR-002](docs/adr/002-platform-neutral-batch-rendering.md).
+- **Добавление обработчика**: из-за Native AOT все DI-регистрации выполняются вручную в `src/GmRelay.Bot/Program.cs` (assembly scanning не используется).
+- **Миграции**: SQL-скрипты добавляются как embedded resources в `src/GmRelay.Bot/Migrations/` и применяются автоматически при старте бота через DbUp.
+- **Тесты**: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --verbosity normal`
+- **Сборка**: `dotnet build`
+
+---
+
 ## 📜 Лицензия
 
 MIT License. См. [LICENSE](./LICENSE).

RELEASE_NOTES.md

@@ -0,0 +1,23 @@
+## 🛠 Patch 2.4.0 — Discord /newsession и /listsessions
+
+Реализованы slash-команды Discord для создания сессий и просмотра расписания без Web Dashboard.
+
+## 🧩 Что вошло в релиз
+- src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionCommand.cs — slash-команда /newsession с параметрами (title, time, seats, link)
+- src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionHandler.cs — handler создания batch + session в БД
+- src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsCommand.cs — slash-команда /listsessions
+- src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsHandler.cs — handler запроса активных сессий с embed-рендерингом
+- src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPermissionChecker.cs — проверка прав через Discord permissions bitflag (Administrator = 0x8)
+- src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs — реализация IPlatformMessenger для Discord через NetCord REST
+- src/GmRelay.DiscordBot/Program.cs — регистрация DI: handlers, permission checker, messenger
+- 	ests/GmRelay.Bot.Tests/Discord/ — 20+ TDD-тестов на парсинг, права, структуру, DI, рендеринг
+- Синхронизированы версии: Directory.Build.props, NavMenu.razor, compose.yaml, deploy.yml → 2.4.0
+
+## 🗺 Что это даёт
+- Мастера (GM) могут создавать сессии прямо из Discord, не заходя в Web.
+- Участники сервера видят расписание через /listsessions.
+- Единая PostgreSQL модель для Telegram и Discord — никакого дублирования данных.
+
+## 📦 Версия и деплой
+- версия обновлена до 2.4.0
+- Docker-образы используют тег 2.4.0

compose.yaml

@@ -49,7 +49,7 @@ services:
         crond -f
 
   bot:
-    image: git.codeanddice.ru/toutsu/gmrelay-bot:2.4.0
+    image: git.codeanddice.ru/toutsu/gmrelay-bot:3.0.1
     restart: always
     depends_on:
       db:
@@ -67,7 +67,7 @@ services:
       retries: 3
 
   discord:
-    image: git.codeanddice.ru/toutsu/gmrelay-discord-bot:2.4.0
+    image: git.codeanddice.ru/toutsu/gmrelay-discord-bot:3.0.1
     restart: always
     depends_on:
       db:
@@ -77,9 +77,14 @@ services:
       - "Discord__Token=${DISCORD_BOT_TOKEN:?Set DISCORD_BOT_TOKEN in .env}"
     networks:
       - gmrelay
+    healthcheck:
+      test: ["CMD-SHELL", "wget -qO- http://localhost:8082/health || exit 1"]
+      interval: 10s
+      timeout: 5s
+      retries: 3
 
   web:
-    image: git.codeanddice.ru/toutsu/gmrelay-web:2.4.0
+    image: git.codeanddice.ru/toutsu/gmrelay-web:3.0.1
     restart: always
     depends_on:
       db:
@@ -89,6 +94,9 @@ services:
       - "Telegram__BotToken=${TELEGRAM_BOT_TOKEN:?Set TELEGRAM_BOT_TOKEN in .env}"
       - "Telegram__BotUsername=${TELEGRAM_BOT_USERNAME:?Set TELEGRAM_BOT_USERNAME in .env}"
       - "Telegram__MiniAppUrl=${TELEGRAM_MINI_APP_URL:-}"
+      - "Discord__ClientId=${DISCORD_CLIENT_ID:-}"
+      - "Discord__ClientSecret=${DISCORD_CLIENT_SECRET:-}"
+      - "Discord__RedirectUri=${DISCORD_REDIRECT_URI:-}"
     ports:
       - "${GMRELAY_WEB_PORT:-8080}:8080"
     volumes:

docs/adr/0001-use-vertical-slice-native-aot-and-aspire.md

@@ -56,8 +56,18 @@ Aspire обеспечивает:
 - Service discovery и передачу connection strings.
 - OpenTelemetry (traces, metrics, logs) из коробки.
 - Aspire Dashboard для мониторинга.
+- **Три сервиса:** Bot (Telegram long polling + Discord Gateway), Web, PostgreSQL.
 
-### 5. Telegram.Bot 22.x + Long Polling
+### 5. Discord Gateway + NetCord
+
+Discord-интеграция реализована через NetCord Gateway (не DSharpPlus) из-за:
+- Нативной совместимости с .NET 10 и минимального размера зависимостей.
+- Gateway events маршрутизируются в те же vertical slice handlers, что и Telegram updates.
+- Slash-команды регистрируются через NetCord `ApplicationCommandService`.
+
+Ephemeral-ответы (кнопки Join/Leave/RSVP) используют `InteractionMessageProperties` с `Flags = MessageFlags.Ephemeral`.
+
+### 6. Telegram.Bot 22.x + Long Polling
 
 - Long Polling — единственный вариант для Pi за NAT.
 - Telegram.Bot поддерживает `System.Text.Json` source generators для AOT.

docs/adr/002-platform-neutral-batch-rendering.md

@@ -30,7 +30,7 @@ SessionBatchViewModel (platform-neutral)
     │
     ├──► TelegramSessionBatchRenderer ──► HTML + InlineKeyboardMarkup
     │
-    └──► DiscordSessionBatchRenderer ──► (issue #26)
+    └──► DiscordSessionBatchRenderer ──► Discord embeds + buttons
 ```
 
 ### Изменённые компоненты
@@ -41,7 +41,7 @@ SessionBatchViewModel (platform-neutral)
 | `SessionBatchViewBuilder` | — | `GmRelay.Shared.Rendering` |
 | `SessionBatchViewModel` | — | `GmRelay.Shared.Rendering` |
 | `TelegramSessionBatchRenderer` | — | `GmRelay.Bot` + `GmRelay.Web` |
-| `DiscordSessionBatchRenderer` | — | `GmRelay.Shared.Rendering` (stub) |
+| `DiscordSessionBatchRenderer` | — | `GmRelay.DiscordBot.Rendering` |
 | `BatchMessageEditor` | `GmRelay.Shared.Rendering` | `GmRelay.Bot` + `GmRelay.Web` |
 
 ## Consequences
@@ -49,7 +49,7 @@ SessionBatchViewModel (platform-neutral)
 ### Positive
 
 - `GmRelay.Shared` больше не зависит от `Telegram.Bot`. Чистый platform-agnostic проект.
-- Можно добавить `DiscordSessionBatchRenderer` без изменений в `Shared`.
+- Discord renderer lives in `GmRelay.DiscordBot`, so NetCord stays out of `Shared`.
 - Unit-тесты ViewBuilder не создают `InlineKeyboardMarkup`.
 - Логика подсчёта игроков, сортировки сессий и генерации действий — в одном месте (ViewBuilder).
 
@@ -62,4 +62,8 @@ SessionBatchViewModel (platform-neutral)
 
 - Issue #22 — этот рефакторинг.
 - Issue #26 — Discord Bot MVP (потребитель новой архитектуры).
+- Issue #30 — Discord reschedule voting использует `IPlatformMessenger`.
+- Issue #31 — scheduler notifications и reschedule deadline updates через `IPlatformMessenger`.
+- Issue #32 — compose wiring для Discord bot (healthcheck :8082).
+- Issue #33 — регрессионные тесты platform rendering (Telegram + Discord).
 - ADR 001 — vertical slice, native AOT, Aspire (`docs/adr/0001-use-vertical-slice-native-aot-and-aspire.md`).

docs/adr/003-discord-integration-architecture.md

@@ -0,0 +1,57 @@
+# ADR 003: Discord Integration Architecture
+
+## Status
+
+**Accepted** — implemented in v2.6.0 (PR #87, issue #30).
+
+## Context
+
+После Telegram-бота требовалась поддержка Discord для кросс-платформенных групп. Нужно было выбрать:
+1. Библиотеку для Discord API (NetCord vs DSharpPlus vs Discord.NET).
+2. Модель runtime (отдельный процесс vs тот же Worker).
+3. Способ обработки интеракций (Gateway events vs HTTP interactions).
+
+## Decision
+
+### 1. NetCord (не DSharpPlus, не Discord.NET)
+
+- **NetCord** — лёгкий, AOT-compatible, minimal dependencies.
+- **DSharpPlus** — слишком тяжёлый, много зависимостей, reflection-heavy.
+- **Discord.NET** — несовместим с Native AOT (heavy reflection, dynamic IL).
+
+### 2. Gateway Events внутри GmRelay.Bot
+
+- Discord Gateway worker живёт **внутри** `GmRelay.Bot` (тот же Worker Service), а не как отдельный проект.
+- Это упрощает DI, shared DB connection, shared `IPlatformMessenger`.
+- Для масштабирования можно вынести в отдельный контейнер позже.
+
+### 3. Slash-команды через NetCord ApplicationCommandService
+
+- Регистрация глобальных slash-команд (`/newsession`, `/listsessions`) через `ApplicationCommandService`.
+- Команды мапятся на vertical slice handlers через `DiscordSessionInteractionModule`.
+
+### 4. Ephemeral Replies
+
+- Все кнопки (Join/Leave/RSVP) отвечают ephemeral (`MessageFlags.Ephemeral`).
+- Schedule message редактируется через `DiscordPlatformMessenger` (реализация `IPlatformMessenger`).
+
+## Consequences
+
+### Positive
+
+- Один бинарник для Telegram + Discord.
+- Shared DI, shared DB pool, shared domain logic.
+- Native AOT совместимость.
+
+### Negative
+
+- Gateway connection требует persistent WebSocket — при разрыве происходит reconnect.
+- Discord rate limits агрессивнее Telegram — нужен backoff.
+
+## Related
+
+- Issue #30 — reschedule voting (кнопки + дедлайн).
+- Issue #31 — scheduler notifications через `IPlatformMessenger`.
+- Issue #32 — compose wiring + healthcheck.
+- ADR 001 — Vertical Slice, Native AOT, Aspire.
+- ADR 002 — Platform-Neutral Rendering.

docs/c4-system-context.md

@@ -1,4 +1,4 @@
-# GM-Relay — C4 Model
+# GM-Relay - C4 Model
 
 ## Level 1: System Context
 
@@ -6,19 +6,24 @@
 C4Context
     title GM-Relay System Context
 
-    Person(gm, "Game Master", "Создаёт сессии, управляет расписанием игр")
+    Person(gm, "Game Master", "Creates sessions and manages schedules")
-    Person(player, "Player", "Подтверждает участие через inline-кнопки")
+    Person(player, "Player", "Joins, leaves, confirms, and receives reminders")
 
-    System(gmrelay, "GM-Relay Bot", "Telegram Worker Service на Raspberry Pi. Управляет подтверждениями, рассылает напоминания и ссылки.")
+    System(gmrelay, "GM-Relay", "Telegram bot, Discord worker, web dashboard, and shared scheduling logic")
 
-    System_Ext(telegram, "Telegram Bot API", "Long Polling. Сообщения, inline keyboards, callback queries.")
+    System_Ext(telegram, "Telegram Bot API", "Commands, inline keyboards, callback queries, Mini App entry points")
-    SystemDb_Ext(postgres, "PostgreSQL", "Сессии, игроки, RSVP-статусы")
+    System_Ext(discord, "Discord Gateway and REST API", "Slash commands, button interactions, message edits, ephemeral replies")
+    SystemDb_Ext(postgres, "PostgreSQL", "Sessions, players, participants, groups, platform identities")
 
-    Rel(gm, telegram, "Команды бота (/newsession)")
+    Rel(gm, telegram, "Creates and manages sessions")
-    Rel(player, telegram, "Нажимает кнопки (✅ Буду / ❌ Не смогу)")
+    Rel(gm, discord, "Uses /newsession and /listsessions")
-    Rel(telegram, gmrelay, "Updates (Long Polling)")
+    Rel(player, telegram, "Uses inline buttons")
+    Rel(player, discord, "Uses Join/Leave and RSVP buttons")
+    Rel(telegram, gmrelay, "Updates via long polling")
+    Rel(discord, gmrelay, "Gateway events and component interactions")
     Rel(gmrelay, telegram, "SendMessage, EditMessage, AnswerCallbackQuery")
-    Rel(gmrelay, postgres, "SQL (Npgsql + Dapper)")
+    Rel(gmrelay, discord, "Send/edit schedule, RSVP, reminder, and reschedule messages")
+    Rel(gmrelay, postgres, "SQL via Npgsql and Dapper")
 ```
 
 ## Level 2: Container
@@ -30,49 +35,89 @@ C4Container
     Person(gm, "Game Master")
     Person(player, "Player")
 
-    System_Boundary(pi, "Raspberry Pi 5") {
+    System_Boundary(runtime, "Docker Compose / Aspire runtime") {
-        Container(bot, "GmRelay.Bot", "Worker Service, .NET 10 AOT", "Long polling, обработка команд и callback queries, планировщик")
+        Container(bot, "GmRelay.Bot", "Worker Service, .NET 10 AOT", "Telegram long polling, commands, callback routing, reminders")
-        ContainerDb(db, "PostgreSQL 16", "Database", "sessions, players, session_participants, game_groups")
+        Container(discordBot, "Discord Gateway Worker", "Внутри GmRelay.Bot", "NetCord Gateway, slash commands, scheduler notifications, button interactions, healthcheck :8082")
+        Container(web, "GmRelay.Web", "Blazor Server", "Dashboard, Mini App pages, editing and stats")
+        Container(shared, "GmRelay.Shared", ".NET library", "Shared domain models, rendering, scheduler, and platform-neutral handlers")
+        ContainerDb(db, "PostgreSQL", "Database", "sessions, players, session_participants, game_groups, platform identities")
     }
 
     System_Ext(telegram, "Telegram Bot API")
+    System_Ext(discord, "Discord Gateway and REST API")
 
     Rel(gm, telegram, "Commands")
-    Rel(player, telegram, "Callback Queries")
+    Rel(gm, discord, "Slash commands")
-    Rel(telegram, bot, "GetUpdates (Long Polling)")
+    Rel(player, telegram, "Callback queries")
+    Rel(player, discord, "Button interactions")
+    Rel(telegram, bot, "GetUpdates")
+    Rel(discord, discordBot, "Gateway events")
     Rel(bot, telegram, "Bot API calls")
+    Rel(discordBot, discord, "REST send/edit/reply calls")
+    Rel(bot, shared, "Uses shared renderers and join/leave handlers")
+    Rel(discordBot, shared, "Uses shared renderers, scheduler, and platform-neutral handlers")
+    Rel(web, shared, "Uses shared domain and rendering models")
     Rel(bot, db, "Npgsql + Dapper.AOT")
+    Rel(discordBot, db, "Npgsql + Dapper")
+    Rel(web, db, "Npgsql + Dapper")
 ```
 
-## Level 3: Component (GmRelay.Bot)
+## Level 3: Component - Session Interactions
 
 ```mermaid
 C4Component
-    title GmRelay.Bot Components
+    title Platform-Neutral Session Interactions
 
-    Container_Boundary(bot, "GmRelay.Bot") {
+    Container_Boundary(shared, "GmRelay.Shared") {
-        Component(polling, "TelegramBotService", "BackgroundService", "Long polling loop, получает Updates")
+        Component(join, "JoinSessionHandler", "Feature handler", "Adds players as Active or Waitlisted with session row locking")
-        Component(router, "UpdateRouter", "C#", "Маршрутизирует Update → Handler по типу")
+        Component(leave, "LeaveSessionHandler", "Feature handler", "Removes players and promotes the first waitlisted player when capacity allows")
-        Component(scheduler, "SessionSchedulerService", "BackgroundService", "PeriodicTimer(60s): T-24ч и T-5мин триггеры")
+        Component(rsvp, "HandleRsvpHandler", "Feature handler", "Updates RSVP state and emits platform-neutral RSVP outcomes")
-        Component(migrator, "DbMigrator", "DbUp", "SQL миграции при старте")
+        Component(scheduler, "SessionSchedulerService", "Background service", "Triggers confirmation, reminder, and join-link notifications per platform")
-
+        Component(updateLock, "ScheduleMessageUpdateLock", "In-memory keyed lock", "Serializes DB changes and schedule message edits per platform message")
-        Component(confirm, "SendConfirmationHandler", "Feature", "Отправляет inline keyboard за 24ч")
+        Component(renderer, "SessionBatchViewBuilder", "Renderer model builder", "Builds platform-neutral schedule views and actions")
-        Component(rsvp, "HandleRsvpHandler", "Feature", "Обрабатывает ✅/❌, проверяет all-confirmed")
-        Component(link, "SendJoinLinkHandler", "Feature", "Отправляет join link за 5 мин")
     }
 
-    System_Ext(telegram, "Telegram Bot API")
+    Component(healthCheck, "DiscordHealthCheckHostedService", ":8082", "Healthcheck для Docker Compose")
-    ContainerDb(db, "PostgreSQL")
 
-    Rel(polling, router, "Update")
+    Container_Boundary(discordBot, "GmRelay.DiscordBot") {
-    Rel(router, rsvp, "CallbackQuery rsvp:*")
+        Component(discordModule, "DiscordSessionInteractionModule", "NetCord component module", "Maps join_session/leave_session/rsvp buttons to neutral commands")
-    Rel(scheduler, confirm, "T-24h trigger")
+        Component(discordMessenger, "DiscordPlatformMessenger", "IPlatformMessenger", "Sends and edits Discord schedule, RSVP, reminder, join-link, and reschedule messages")
-    Rel(scheduler, link, "T-5min trigger")
+    }
-    Rel(confirm, telegram, "SendMessage + InlineKeyboard")
+
-    Rel(rsvp, telegram, "EditMessage + AnswerCallback")
+    Container_Boundary(bot, "GmRelay.Bot") {
-    Rel(link, telegram, "SendMessage + user mentions")
+        Component(updateRouter, "UpdateRouter", "Telegram adapter", "Maps callback queries to neutral commands")
-    Rel(confirm, db, "SELECT/UPDATE sessions")
+        Component(telegramMessenger, "TelegramPlatformMessenger", "IPlatformMessenger", "Sends and edits Telegram schedule, RSVP, reminder, join-link, and reschedule messages")
-    Rel(rsvp, db, "UPDATE participants, SELECT counts")
+    }
-    Rel(link, db, "SELECT confirmed players")
+
-    Rel(migrator, db, "DDL migrations")
+    ContainerDb(db, "PostgreSQL")
+    System_Ext(telegram, "Telegram Bot API")
+    System_Ext(discord, "Discord Gateway and REST API")
+
+    Rel(discord, discordModule, "Button interaction")
+    Rel(discordModule, join, "JoinSessionCommand")
+    Rel(discordModule, leave, "LeaveSessionCommand")
+    Rel(discordModule, rsvp, "HandleRsvpCommand")
+    Rel(discordModule, discord, "Deferred ephemeral reply, then modify response")
+    Rel(updateRouter, join, "JoinSessionCommand")
+    Rel(updateRouter, leave, "LeaveSessionCommand")
+    Rel(updateRouter, rsvp, "HandleRsvpCommand")
+    Rel(join, updateLock, "Acquire by PlatformMessageRef")
+    Rel(leave, updateLock, "Acquire by PlatformMessageRef")
+    Rel(join, db, "SELECT FOR UPDATE, INSERT participant")
+    Rel(leave, db, "SELECT FOR UPDATE, DELETE/promote participant")
+    Rel(rsvp, db, "Update RSVP and load notification recipients")
+    Rel(scheduler, db, "Load due session triggers")
+    Rel(join, renderer, "Build updated schedule view")
+    Rel(leave, renderer, "Build updated schedule view")
+    Rel(join, discordMessenger, "Update Discord schedule when command is Discord")
+    Rel(leave, discordMessenger, "Update Discord schedule when command is Discord")
+    Rel(join, telegramMessenger, "Update Telegram schedule when command is Telegram")
+    Rel(leave, telegramMessenger, "Update Telegram schedule when command is Telegram")
+    Rel(rsvp, discordMessenger, "Update Discord confirmation and outcomes")
+    Rel(rsvp, telegramMessenger, "Update Telegram confirmation and outcomes")
+    Rel(scheduler, discordMessenger, "Send Discord scheduler notifications")
+    Rel(scheduler, telegramMessenger, "Send Telegram scheduler notifications")
+    Rel(discordMessenger, discord, "REST send/edit/DM + ephemeral text")
+    Rel(telegramMessenger, telegram, "SendMessage/EditMessage + AnswerCallbackQuery")
+    Rel(healthCheck, discord, "HTTP /health")
 ```

docs/plans/2026-05-04-player-list-kick-waitlist.md

@@ -1,438 +0,0 @@
-# Player List + Kick + Waitlist Promotion Implementation Plan
-
-> **For Hermes:** Use subagent-driven-development skill to implement this plan task-by-task.
-
-**Goal:** Add a player list (with names) to the Web UI session views, allow GM to kick a specific player, and auto-promote the next waitlisted player.
-
-**Architecture:** Extend `ISessionStore` with participant queries and a remove method. Update `GroupDetails.razor` to show expandable participant lists. Reuse existing `PromoteWaitlistedPlayerAsync` logic after removal.
-
-**Tech Stack:** C# 14, Blazor SSR, Dapper, PostgreSQL
-
----
-
-## Task 1: Add domain model for WebParticipant
-
-**Objective:** Create a DTO to represent a session participant in the web layer.
-
-**Files:**
-- Modify: `src/GmRelay.Web/Services/SessionService.cs`
-
-**Step 1: Add record**
-
-```csharp
-public sealed record WebParticipant(
-    Guid Id,
-    long TelegramId,
-    string DisplayName,
-    string? TelegramUsername,
-    string RsvpStatus,
-    string RegistrationStatus,
-    bool IsGm,
-    DateTime? RespondedAt);
-```
-
-**Step 2: Commit**
-
-```bash
-git add src/GmRelay.Web/Services/SessionService.cs
-git commit -m "feat: add WebParticipant record"
-```
-
----
-
-## Task 2: Add GetSessionParticipantsAsync to ISessionStore
-
-**Objective:** Retrieve all participants for a session with full player info.
-
-**Files:**
-- Modify: `src/GmRelay.Web/Services/ISessionStore.cs`
-- Modify: `src/GmRelay.Web/Services/SessionService.cs`
-- Modify: `src/GmRelay.Web/Services/AuthorizedSessionService.cs`
-
-**Step 1: Add to interface**
-
-In `ISessionStore.cs`, add:
-```csharp
-Task<List<WebParticipant>> GetSessionParticipantsAsync(Guid sessionId);
-```
-
-**Step 2: Implement in SessionService**
-
-In `SessionService.cs`, add:
-```csharp
-public async Task<List<WebParticipant>> GetSessionParticipantsAsync(Guid sessionId)
-{
-    await using var conn = await dataSource.OpenConnectionAsync();
-    return (await conn.QueryAsync<WebParticipant>(
-        """
-        SELECT sp.id AS Id,
-               p.telegram_id AS TelegramId,
-               p.display_name AS DisplayName,
-               p.telegram_username AS TelegramUsername,
-               sp.rsvp_status AS RsvpStatus,
-               sp.registration_status AS RegistrationStatus,
-               sp.is_gm AS IsGm,
-               sp.responded_at AS RespondedAt
-        FROM session_participants sp
-        JOIN players p ON p.id = sp.player_id
-        WHERE sp.session_id = @SessionId
-        ORDER BY sp.is_gm DESC,
-                 CASE sp.registration_status WHEN 'Active' THEN 0 ELSE 1 END,
-                 sp.created_at
-        """,
-        new { SessionId = sessionId })).ToList();
-}
-```
-
-**Step 3: Add authorized wrapper**
-
-In `AuthorizedSessionService.cs`, add:
-```csharp
-public async Task<List<WebParticipant>?> GetSessionParticipantsForGmAsync(Guid sessionId, long gmId)
-{
-    var session = await GetSessionForGmAsync(sessionId, gmId);
-    if (session is null)
-    {
-        return null;
-    }
-
-    return await sessionStore.GetSessionParticipantsAsync(sessionId);
-}
-```
-
-**Step 4: Commit**
-
-```bash
-git add src/GmRelay.Web/Services/ISessionStore.cs
-
-git add src/GmRelay.Web/Services/SessionService.cs
-
-git add src/GmRelay.Web/Services/AuthorizedSessionService.cs
-
-git commit -m "feat: add GetSessionParticipantsAsync"
-```
-
----
-
-## Task 3: Add RemovePlayerFromSessionAsync with waitlist promotion
-
-**Objective:** Allow GM to remove a specific player; auto-promote next waitlisted player if conditions met.
-
-**Files:**
-- Modify: `src/GmRelay.Web/Services/ISessionStore.cs`
-- Modify: `src/GmRelay.Web/Services/SessionService.cs`
-- Modify: `src/GmRelay.Web/Services/AuthorizedSessionService.cs`
-
-**Step 1: Add to interface**
-
-In `ISessionStore.cs`, add:
-```csharp
-Task RemovePlayerFromSessionAsync(Guid sessionId, Guid groupId, Guid participantId);
-```
-
-**Step 2: Implement in SessionService**
-
-In `SessionService.cs`, add:
-```csharp
-public async Task RemovePlayerFromSessionAsync(Guid sessionId, Guid groupId, Guid participantId)
-{
-    await using var conn = await dataSource.OpenConnectionAsync();
-    await using var transaction = await conn.BeginTransactionAsync();
-
-    var session = await conn.QuerySingleOrDefaultAsync<WebSession>(
-        @"SELECT s.id, s.group_id AS GroupId, s.title, s.scheduled_at AS ScheduledAt, s.status, s.join_link AS JoinLink,
-                 s.batch_id AS BatchId, s.batch_message_id AS BatchMessageId,
-                 g.telegram_chat_id AS TelegramChatId,
-                 s.max_players AS MaxPlayers,
-                 0 AS ActivePlayerCount,
-                 0 AS WaitlistedPlayerCount,
-                 s.notification_mode AS NotificationMode
-          FROM sessions s
-          JOIN game_groups g ON g.id = s.group_id
-          WHERE s.id = @SessionId AND s.group_id = @GroupId
-          FOR UPDATE",
-        new { SessionId = sessionId, GroupId = groupId },
-        transaction);
-
-    if (session is null)
-    {
-        throw new SessionAccessDeniedException(sessionId, 0);
-    }
-
-    // Verify participant exists in this session
-    var participant = await conn.QuerySingleOrDefaultAsync<WebParticipant>(
-        """
-        SELECT sp.id AS Id,
-               p.telegram_id AS TelegramId,
-               p.display_name AS DisplayName,
-               p.telegram_username AS TelegramUsername,
-               sp.rsvp_status AS RsvpStatus,
-               sp.registration_status AS RegistrationStatus,
-               sp.is_gm AS IsGm,
-               sp.responded_at AS RespondedAt
-        FROM session_participants sp
-        JOIN players p ON p.id = sp.player_id
-        WHERE sp.id = @ParticipantId AND sp.session_id = @SessionId
-        """,
-        new { ParticipantId = participantId, SessionId = sessionId },
-        transaction);
-
-    if (participant is null)
-    {
-        throw new InvalidOperationException("Участник не найден в этой сессии.");
-    }
-
-    bool wasActive = participant.RegistrationStatus == ParticipantRegistrationStatus.Active;
-
-    await conn.ExecuteAsync(
-        "DELETE FROM session_participants WHERE id = @ParticipantId",
-        new { ParticipantId = participantId },
-        transaction);
-
-    WebPromotedParticipantDto? promoted = null;
-
-    if (wasActive)
-    {
-        promoted = await conn.QuerySingleOrDefaultAsync<WebPromotedParticipantDto>(
-            """
-            SELECT sp.id AS ParticipantRowId,
-                   p.display_name AS DisplayName
-            FROM session_participants sp
-            JOIN players p ON p.id = sp.player_id
-            WHERE sp.session_id = @SessionId
-              AND sp.is_gm = false
-              AND sp.registration_status = @Waitlisted
-            ORDER BY sp.created_at ASC, sp.id ASC
-            LIMIT 1
-            FOR UPDATE OF sp
-            """,
-            new { SessionId = sessionId, Waitlisted = ParticipantRegistrationStatus.Waitlisted },
-            transaction);
-
-        if (promoted is not null)
-        {
-            await conn.ExecuteAsync(
-                """
-                UPDATE session_participants
-                SET registration_status = @Active,
-                    rsvp_status = @Pending,
-                    responded_at = NULL
-                WHERE id = @ParticipantRowId
-                """,
-                new
-                {
-                    promoted.ParticipantRowId,
-                    Active = ParticipantRegistrationStatus.Active,
-                    Pending = RsvpStatus.Pending
-                },
-                transaction);
-        }
-    }
-
-    await transaction.CommitAsync();
-
-    // Notifications
-    await bot.SendMessage(
-        session.TelegramChatId,
-        $"🚪 <b>{System.Net.WebUtility.HtmlEncode(participant.DisplayName)}</b> удален(а) из сессии «{System.Net.WebUtility.HtmlEncode(session.Title)}».",
-        parseMode: Telegram.Bot.Types.Enums.ParseMode.Html);
-
-    if (promoted is not null)
-    {
-        await bot.SendMessage(
-            session.TelegramChatId,
-            $"⬆️ <b>{System.Net.WebUtility.HtmlEncode(promoted.DisplayName)}</b> переведен(а) из листа ожидания в основной состав «{System.Net.WebUtility.HtmlEncode(session.Title)}».",
-            parseMode: Telegram.Bot.Types.Enums.ParseMode.Html);
-    }
-
-    if (session.BatchMessageId.HasValue)
-    {
-        await TryUpdateBatchMessageAsync(session.BatchId, session.TelegramChatId, session.BatchMessageId.Value, session.Title);
-    }
-}
-```
-
-**Step 3: Add authorized wrapper**
-
-In `AuthorizedSessionService.cs`, add:
-```csharp
-public async Task RemovePlayerFromSessionForGmAsync(Guid sessionId, long gmId, Guid participantId)
-{
-    var session = await GetSessionForGmAsync(sessionId, gmId);
-    if (session is null)
-    {
-        throw new SessionAccessDeniedException(sessionId, gmId);
-    }
-
-    await sessionStore.RemovePlayerFromSessionAsync(sessionId, session.GroupId, participantId);
-}
-```
-
-**Step 4: Commit**
-
-```bash
-git add src/GmRelay.Web/Services/ISessionStore.cs
-
-git add src/GmRelay.Web/Services/SessionService.cs
-
-git add src/GmRelay.Web/Services/AuthorizedSessionService.cs
-
-git commit -m "feat: add RemovePlayerFromSessionAsync with waitlist promotion"
-```
-
----
-
-## Task 4: Modify GroupDetails.razor to show participant list
-
-**Objective:** Add expandable player lists to each session row with kick buttons.
-
-**Files:**
-- Modify: `src/GmRelay.Web/Components/Pages/GroupDetails.razor`
-
-**Step 1:** Add `participants` dictionary and `kickingParticipantId` state variables.
-
-**Step 2:** Add `LoadParticipants(Guid sessionId)` and `KickParticipant(Guid sessionId, Guid participantId)` methods.
-
-**Step 3:** In desktop table, add a new column or expand row with participant list.
-
-**Step 4:** In mobile cards, add expandable participant section.
-
-**Step 5:** Add styles to `app.css` if needed (badge styles are already present).
-
-**Step 6:** Commit
-
-```bash
-git add src/GmRelay.Web/Components/Pages/GroupDetails.razor
-
-git add src/GmRelay.Web/wwwroot/app.css
-
-git commit -m "feat: show player list and kick button in GroupDetails"
-```
-
----
-
-## Task 5: Modify EditSession.razor to show participant list
-
-**Objective:** Show participant list on the edit page with kick capability.
-
-**Files:**
-- Modify: `src/GmRelay.Web/Components/Pages/EditSession.razor`
-
-**Step 1:** Load participants in `OnInitializedAsync`.
-
-**Step 2:** Render participant list below the edit form.
-
-**Step 3:** Add kick button for each non-GM participant.
-
-**Step 4:** Commit
-
-```bash
-git add src/GmRelay.Web/Components/Pages/EditSession.razor
-
-git commit -m "feat: show player list and kick button in EditSession"
-```
-
----
-
-## Task 6: Add backend tests
-
-**Objective:** Cover new GetSessionParticipants and RemovePlayerFromSession logic.
-
-**Files:**
-- Create: `tests/GmRelay.Bot.Tests/Web/SessionParticipantTests.cs`
-
-**Step 1:** Write tests for `GetSessionParticipantsForGmAsync`.
-
-**Step 2:** Write tests for `RemovePlayerFromSessionForGmAsync` including waitlist promotion.
-
-**Step 3:** Run tests
-
-```bash
-dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj -v n
-```
-
-**Step 4:** Commit
-
-```bash
-git add tests/GmRelay.Bot.Tests/Web/SessionParticipantTests.cs
-
-git commit -m "test: add SessionParticipant service tests"
-```
-
----
-
-## Task 7: Update README
-
-**Objective:** Bump version and document new features.
-
-**Files:**
-- Modify: `README.md`
-
-**Step 1:** Change version from `v1.9.6` to `v1.9.7`.
-
-**Step 2:** Add bullet under Web Dashboard: player list with kick and auto-promote.
-
-**Step 3:** Commit
-
-```bash
-git add README.md
-
-git commit -m "docs: bump README to v1.9.7, document player list kick"
-```
-
----
-
-## Task 8: Update Wiki
-
-**Objective:** Update `Руководство ГМа` page with player management instructions.
-
-**Files:**
-- Modify: Wiki page `Руководство ГМа`
-
-**Step 1:** Read current wiki content via MCP.
-
-**Step 2:** Add section about viewing player list and removing players.
-
-**Step 3:** Update via MCP.
-
----
-
-## Task 9: Push branch and run CI
-
-**Objective:** Push branch, monitor workflow, fix issues.
-
-**Step 1:** Push
-
-```bash
-git push -u origin feat/player-list-kick-waitlist
-```
-
-**Step 2:** Check workflow run via MCP gitea actions.
-
-**Step 3:** Fix any issues.
-
----
-
-## Task 10: Merge and create release
-
-**Objective:** Merge PR (or fast-forward), tag, create release.
-
-**Step 1:** Merge to main
-
-```bash
-git checkout main
-
-git merge --no-ff feat/player-list-kick-waitlist -m "feat: player list, kick, and waitlist promotion (#X)"
-```
-
-**Step 2:** Tag v1.9.7
-
-```bash
-git tag v1.9.7
-
-git push origin main --tags
-```
-
-**Step 3:** Create release via MCP gitea_create_release.
-
----

docs/superpowers/plans/2026-04-28-telegram-mini-app-dashboard.md

@@ -1,69 +0,0 @@
-# Telegram Mini App Dashboard Implementation Plan
-
-> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** Add a Telegram Mini App mobile dashboard that reuses the existing Web Dashboard and validates Telegram WebApp `initData` on the server.
-
-**Architecture:** Extend `TelegramAuthService` for WebApp init data, add a `/miniapp` Blazor entry page plus `/auth/telegram-webapp` endpoint, and add bot entry points through an inline WebApp button and optional menu button setup. Existing application/domain services remain the only write path.
-
-**Tech Stack:** .NET 10, Blazor Server, Telegram.Bot, xUnit, Dapper/Npgsql-backed existing services.
-
----
-
-### Task 1: Telegram WebApp Authentication
-
-**Files:**
-- Modify: `src/GmRelay.Web/Services/TelegramAuthService.cs`
-- Modify: `src/GmRelay.Web/Program.cs`
-- Test: `tests/GmRelay.Bot.Tests/Web/TelegramAuthServiceTests.cs`
-
-- [ ] Write failing tests for valid WebApp `initData`, tampered hash, and expired auth date.
-- [ ] Run `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter TelegramAuthServiceTests`.
-- [ ] Implement WebApp HMAC verification using the Telegram `WebAppData` secret derivation.
-- [ ] Add `/auth/telegram-webapp` endpoint that signs in using the same claims as `/auth/telegram`.
-- [ ] Re-run the filtered tests.
-
-### Task 2: Mini App Entry Page
-
-**Files:**
-- Create: `src/GmRelay.Web/Components/Pages/MiniApp.razor`
-- Modify: `src/GmRelay.Web/Components/App.razor`
-- Modify: `src/GmRelay.Web/wwwroot/app.css`
-- Test: `tests/GmRelay.Bot.Tests/Web/MiniAppDashboardTests.cs`
-
-- [ ] Write failing tests that assert `/miniapp`, `telegram-web-app.js`, `authenticateTelegramMiniApp`, and Mini App CSS hooks exist.
-- [ ] Run `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter MiniAppDashboardTests`.
-- [ ] Implement `/miniapp` to post `Telegram.WebApp.initData` to `/auth/telegram-webapp`, expand/ready the Mini App, and show fallback login when opened outside Telegram.
-- [ ] Add CSS for a mobile-first Mini App shell and compact dashboard spacing.
-- [ ] Re-run the filtered tests.
-
-### Task 3: Bot Entry Points
-
-**Files:**
-- Create: `src/GmRelay.Bot/Infrastructure/Telegram/TelegramMiniAppMenuButtonService.cs`
-- Modify: `src/GmRelay.Bot/Infrastructure/Telegram/UpdateRouter.cs`
-- Modify: `src/GmRelay.Bot/Program.cs`
-- Test: `tests/GmRelay.Bot.Tests/Infrastructure/Telegram/TelegramMiniAppEntryPointTests.cs`
-
-- [ ] Write failing tests that assert `/start` exposes a WebApp button and startup registers the menu button service.
-- [ ] Run `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter TelegramMiniAppEntryPointTests`.
-- [ ] Add a configurable `Telegram:MiniAppUrl` entry point; when missing, keep existing command behavior.
-- [ ] Add hosted service that calls `SetChatMenuButton` with `MenuButtonWebApp` only when the URL is configured.
-- [ ] Re-run the filtered tests.
-
-### Task 4: Docs, Versions, and Release Prep
-
-**Files:**
-- Modify: `Directory.Build.props`
-- Modify: `compose.yaml`
-- Modify: `.gitea/workflows/deploy.yml`
-- Modify: `src/GmRelay.Web/wwwroot/app.css`
-- Modify: `src/GmRelay.Web/Components/Layout/NavMenu.razor`
-- Modify: `README.md`
-- Wiki: `Home`, `Быстрый старт`, `Руководство ГМа`, `Развёртывание`, `Архитектура`, `Разработка`
-
-- [ ] Update project/container/workflow/UI versions to `1.9.0`.
-- [ ] Document `TELEGRAM_MINI_APP_URL`, BotFather `/setmenubutton`, `/miniapp`, and WebApp auth.
-- [ ] Run `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --collect:"XPlat Code Coverage"`.
-- [ ] Run `dotnet build GM-Relay.slnx -c Release`.
-- [ ] Commit, push, close issue #17, update wiki, create tag/release `v1.9.0`.

docs/superpowers/plans/2026-05-15-platform-messenger-contracts.md

@@ -1,560 +0,0 @@
-# Platform Messenger Contracts Implementation Plan
-
-> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** Implement issue #24 by adding platform-neutral platform identity and messaging contracts, then routing the Telegram session flows through a Telegram adapter without changing Telegram behavior.
-
-**Architecture:** Keep update routing and Telegram update parsing at the `GmRelay.Bot.Infrastructure.Telegram` boundary, but move outbound messaging decisions behind `GmRelay.Shared.Platform.IPlatformMessenger`. `GmRelay.Shared` owns platform-neutral DTOs and contracts; `GmRelay.Bot` owns `TelegramPlatformMessenger`, which translates neutral requests into `Telegram.Bot` calls and reuses the existing Telegram renderers/editing rules.
-
-**Tech Stack:** .NET 10, C# preview, xUnit, Dapper.AOT constraints, Telegram.Bot in `GmRelay.Bot` only, platform-neutral shared contracts in `GmRelay.Shared`.
-
----
-
-## Issue Context
-
-- Gitea issue: #24, `refactor: ввести PlatformKind, PlatformUser, PlatformGroup и IPlatformMessenger`
-- Labels: `area:bot`, `area:platform`, `area:shared`, `platform:multi`, `type:refactor`, `pending-approval`
-- Acceptance criteria:
-  - New contracts live in a platform-neutral layer.
-  - Telegram flow goes through the adapter without behavior changes.
-  - A future DiscordBot can reference the contract without depending on Telegram assemblies.
-
-## Proposed Version Bump
-
-Current version is `2.0.0` in:
-
-- `Directory.Build.props`
-- `compose.yaml`
-- `.gitea/workflows/deploy.yml`
-- `src/GmRelay.Web/Components/Layout/NavMenu.razor`
-
-Issue label is `type:refactor`; per workflow rules this is not a major bump and has no user-facing feature label. Proposed bump: `2.0.0` -> `2.0.1`.
-
-## Files
-
-- Create: `src/GmRelay.Shared/Platform/PlatformKind.cs`
-- Create: `src/GmRelay.Shared/Platform/PlatformUser.cs`
-- Create: `src/GmRelay.Shared/Platform/PlatformGroup.cs`
-- Create: `src/GmRelay.Shared/Platform/PlatformMessageContracts.cs`
-- Create: `src/GmRelay.Shared/Platform/IPlatformMessenger.cs`
-- Create: `src/GmRelay.Bot/Infrastructure/Telegram/TelegramPlatformMessenger.cs`
-- Create: `tests/GmRelay.Bot.Tests/Platform/PlatformContractsTests.cs`
-- Create: `tests/GmRelay.Bot.Tests/Infrastructure/Telegram/TelegramPlatformMessengerSourceTests.cs`
-- Modify: `src/GmRelay.Bot/Program.cs`
-- Modify: `src/GmRelay.Bot/Features/Notifications/DirectSessionNotificationSender.cs`
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs`
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs`
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/CancelSessionHandler.cs`
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/PromoteWaitlistedPlayerHandler.cs`
-- Modify: `src/GmRelay.Bot/Features/Sessions/RescheduleSession/InitiateRescheduleHandler.cs`
-- Modify: `src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleTimeInputHandler.cs`
-- Modify: `src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleVoteHandler.cs`
-- Modify: `src/GmRelay.Bot/Features/Sessions/RescheduleSession/RescheduleVotingDeadlineService.cs`
-- Modify: `src/GmRelay.Bot/Features/Sessions/ExportCalendar/ExportCalendarHandler.cs`
-- Modify: version files listed above
-
-## Design
-
-### Shared Contracts
-
-`PlatformKind` is a sentinel enum where `Max` is not a sendable platform:
-
-```csharp
-namespace GmRelay.Shared.Platform;
-
-public enum PlatformKind
-{
-    Telegram = 0,
-    Discord = 1,
-    Max = 2
-}
-```
-
-`PlatformUser` and `PlatformGroup` carry external platform identity while keeping current Telegram IDs representable as strings:
-
-```csharp
-namespace GmRelay.Shared.Platform;
-
-public sealed record PlatformUser(
-    PlatformKind Platform,
-    string ExternalUserId,
-    string DisplayName,
-    string? ExternalUsername);
-
-public sealed record PlatformGroup(
-    PlatformKind Platform,
-    string ExternalGroupId,
-    string DisplayName,
-    string? ExternalChannelId = null,
-    string? ExternalThreadId = null);
-```
-
-Outbound message contracts stay independent of Telegram/Discord SDK types:
-
-```csharp
-using GmRelay.Shared.Rendering;
-
-namespace GmRelay.Shared.Platform;
-
-public sealed record PlatformMessageRef(
-    PlatformKind Platform,
-    string ExternalGroupId,
-    string? ExternalThreadId,
-    string ExternalMessageId);
-
-public sealed record PlatformMessageAction(
-    string Key,
-    string Label,
-    string Payload);
-
-public sealed record PlatformScheduleMessage(
-    PlatformGroup Group,
-    SessionBatchViewModel View,
-    PlatformMessageRef? ExistingMessage,
-    string? ImageReference = null);
-
-public sealed record PlatformPrivateMessage(
-    PlatformUser Recipient,
-    string HtmlText);
-
-public sealed record PlatformInteractionReply(
-    string InteractionId,
-    string Text,
-    bool ShowAlert = false);
-
-public sealed record PlatformCalendarFile(
-    PlatformGroup Group,
-    string FileName,
-    byte[] Content,
-    string CaptionHtml,
-    IReadOnlyList<PlatformMessageAction> Actions);
-```
-
-`IPlatformMessenger` exposes the required outward operations:
-
-```csharp
-namespace GmRelay.Shared.Platform;
-
-public interface IPlatformMessenger
-{
-    Task<PlatformMessageRef> SendScheduleAsync(PlatformScheduleMessage message, CancellationToken ct);
-    Task UpdateScheduleAsync(PlatformScheduleMessage message, CancellationToken ct);
-    Task SendGroupMessageAsync(PlatformGroup group, string htmlText, CancellationToken ct);
-    Task SendPrivateMessageAsync(PlatformPrivateMessage message, CancellationToken ct);
-    Task AnswerInteractionAsync(PlatformInteractionReply reply, CancellationToken ct);
-    Task SendCalendarFileAsync(PlatformCalendarFile file, CancellationToken ct);
-}
-```
-
-### Telegram Adapter
-
-`TelegramPlatformMessenger` lives in `GmRelay.Bot.Infrastructure.Telegram`, depends on `ITelegramBotClient`, and translates neutral DTOs to existing Telegram calls:
-
-- `SendScheduleAsync` renders `SessionBatchViewModel` with `TelegramSessionBatchRenderer.Render`.
-- `UpdateScheduleAsync` calls `BatchMessageEditor.EditBatchMessageAsync`.
-- `SendGroupMessageAsync` calls `SendMessage` with `ParseMode.Html` and optional `messageThreadId`.
-- `SendPrivateMessageAsync` calls `SendMessage` to `PlatformUser.ExternalUserId`.
-- `AnswerInteractionAsync` calls `AnswerCallbackQuery`.
-- `SendCalendarFileAsync` calls `SendDocument` and maps URL actions to inline keyboard buttons.
-
-### Handler Scope
-
-Refactor outbound Telegram calls in these flows to `IPlatformMessenger`:
-
-- Join/leave/promote waitlist schedule updates and callback replies.
-- Cancel schedule update, group cancellation message, direct notification and callback reply.
-- Reschedule initiation, voting message updates, immediate reschedule schedule update, direct notifications and callback replies.
-- Export calendar file sending.
-
-Keep Telegram inbound DTOs at the boundary for now:
-
-- `UpdateRouter` still receives `Telegram.Bot.Types.Update`.
-- Text message parsing in reschedule input still receives `Telegram.Bot.Types.Message`.
-- `CreateSessionHandler` can keep photo/topic creation via `ITelegramBotClient` because issue #24 targets outbound schedule/interaction/private/calendar contract, not replacing all Telegram update primitives in one PR.
-
-## Tasks
-
-### Task 1: RED - Shared Contract Tests
-
-**Files:**
-- Create: `tests/GmRelay.Bot.Tests/Platform/PlatformContractsTests.cs`
-
-- [ ] **Step 1: Write failing tests for neutral contracts**
-
-```csharp
-using GmRelay.Shared.Platform;
-using GmRelay.Shared.Rendering;
-
-namespace GmRelay.Bot.Tests.Platform;
-
-public sealed class PlatformContractsTests
-{
-    [Fact]
-    public void PlatformKind_ShouldDefineTelegramDiscordAndMaxSentinel()
-    {
-        Assert.Equal(0, (int)PlatformKind.Telegram);
-        Assert.Equal(1, (int)PlatformKind.Discord);
-        Assert.Equal(2, (int)PlatformKind.Max);
-    }
-
-    [Fact]
-    public void PlatformContracts_ShouldBeTelegramAssemblyFree()
-    {
-        var contractTypes = new[]
-        {
-            typeof(PlatformUser),
-            typeof(PlatformGroup),
-            typeof(PlatformMessageRef),
-            typeof(PlatformMessageAction),
-            typeof(PlatformScheduleMessage),
-            typeof(PlatformPrivateMessage),
-            typeof(PlatformInteractionReply),
-            typeof(PlatformCalendarFile),
-            typeof(IPlatformMessenger)
-        };
-
-        Assert.All(contractTypes, type =>
-            Assert.DoesNotContain(
-                "Telegram",
-                string.Join(" ", type.Assembly.GetReferencedAssemblies().Select(value => value.Name)),
-                StringComparison.OrdinalIgnoreCase));
-    }
-
-    [Fact]
-    public void PlatformScheduleMessage_ShouldCarrySharedViewModelWithoutPlatformTypes()
-    {
-        var sessionId = Guid.Parse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa");
-        var view = SessionBatchViewBuilder.Build(
-            "Campaign",
-            [new SessionBatchDto(sessionId, new DateTime(2026, 5, 15, 16, 0, 0, DateTimeKind.Utc), "Planned", 4, "https://example.test/game")],
-            []);
-        var group = new PlatformGroup(PlatformKind.Discord, "guild-1", "Guild", "channel-1", "thread-1");
-
-        var message = new PlatformScheduleMessage(group, view, ExistingMessage: null);
-
-        Assert.Equal(PlatformKind.Discord, message.Group.Platform);
-        Assert.Same(view, message.View);
-    }
-}
-```
-
-- [ ] **Step 2: Run tests and verify RED**
-
-Run:
-
-```powershell
-dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter PlatformContractsTests
-```
-
-Expected: compile failure because `GmRelay.Shared.Platform` types do not exist.
-
-### Task 2: GREEN - Add Shared Contracts
-
-**Files:**
-- Create: `src/GmRelay.Shared/Platform/PlatformKind.cs`
-- Create: `src/GmRelay.Shared/Platform/PlatformUser.cs`
-- Create: `src/GmRelay.Shared/Platform/PlatformGroup.cs`
-- Create: `src/GmRelay.Shared/Platform/PlatformMessageContracts.cs`
-- Create: `src/GmRelay.Shared/Platform/IPlatformMessenger.cs`
-
-- [ ] **Step 1: Add the contract files exactly as described in the Design section**
-- [ ] **Step 2: Run PlatformContractsTests and verify GREEN**
-
-Run:
-
-```powershell
-dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter PlatformContractsTests
-```
-
-Expected: `Passed`.
-
-### Task 3: RED - Adapter and Flow Source Tests
-
-**Files:**
-- Create: `tests/GmRelay.Bot.Tests/Infrastructure/Telegram/TelegramPlatformMessengerSourceTests.cs`
-
-- [ ] **Step 1: Write source tests for adapter wiring and target flows**
-
-```csharp
-namespace GmRelay.Bot.Tests.Infrastructure.Telegram;
-
-public sealed class TelegramPlatformMessengerSourceTests
-{
-    [Fact]
-    public async Task Program_ShouldRegisterTelegramPlatformMessenger()
-    {
-        var program = await ReadRepositoryFileAsync("src/GmRelay.Bot/Program.cs");
-
-        Assert.Contains("IPlatformMessenger", program, StringComparison.Ordinal);
-        Assert.Contains("TelegramPlatformMessenger", program, StringComparison.Ordinal);
-    }
-
-    [Theory]
-    [InlineData("src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs")]
-    [InlineData("src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs")]
-    [InlineData("src/GmRelay.Bot/Features/Sessions/CreateSession/CancelSessionHandler.cs")]
-    [InlineData("src/GmRelay.Bot/Features/Sessions/CreateSession/PromoteWaitlistedPlayerHandler.cs")]
-    [InlineData("src/GmRelay.Bot/Features/Sessions/RescheduleSession/InitiateRescheduleHandler.cs")]
-    [InlineData("src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleTimeInputHandler.cs")]
-    [InlineData("src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleVoteHandler.cs")]
-    [InlineData("src/GmRelay.Bot/Features/Sessions/RescheduleSession/RescheduleVotingDeadlineService.cs")]
-    [InlineData("src/GmRelay.Bot/Features/Sessions/ExportCalendar/ExportCalendarHandler.cs")]
-    public async Task SessionFlows_ShouldUsePlatformMessengerForOutboundTelegramWork(string relativePath)
-    {
-        var source = await ReadRepositoryFileAsync(relativePath);
-
-        Assert.Contains("IPlatformMessenger", source, StringComparison.Ordinal);
-        Assert.DoesNotContain("BatchMessageEditor.EditBatchMessageAsync", source, StringComparison.Ordinal);
-        Assert.DoesNotContain(".AnswerCallbackQuery(", source, StringComparison.Ordinal);
-    }
-
-    [Fact]
-    public async Task TelegramPlatformMessenger_ShouldOwnTelegramBotClientCalls()
-    {
-        var source = await ReadRepositoryFileAsync("src/GmRelay.Bot/Infrastructure/Telegram/TelegramPlatformMessenger.cs");
-
-        Assert.Contains("ITelegramBotClient", source, StringComparison.Ordinal);
-        Assert.Contains("BatchMessageEditor.EditBatchMessageAsync", source, StringComparison.Ordinal);
-        Assert.Contains("AnswerCallbackQuery", source, StringComparison.Ordinal);
-        Assert.Contains("SendDocument", source, StringComparison.Ordinal);
-    }
-
-    private static async Task<string> ReadRepositoryFileAsync(string relativePath)
-    {
-        var directory = new DirectoryInfo(AppContext.BaseDirectory);
-        while (directory is not null)
-        {
-            var candidate = Path.Combine(directory.FullName, relativePath);
-            if (File.Exists(candidate))
-            {
-                return await File.ReadAllTextAsync(candidate);
-            }
-
-            directory = directory.Parent;
-        }
-
-        throw new FileNotFoundException($"Could not locate repository file '{relativePath}'.");
-    }
-}
-```
-
-- [ ] **Step 2: Run tests and verify RED**
-
-Run:
-
-```powershell
-dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter TelegramPlatformMessengerSourceTests
-```
-
-Expected: failures because `TelegramPlatformMessenger` is missing and handlers still call Telegram APIs directly.
-
-### Task 4: GREEN - Implement TelegramPlatformMessenger and Registration
-
-**Files:**
-- Create: `src/GmRelay.Bot/Infrastructure/Telegram/TelegramPlatformMessenger.cs`
-- Modify: `src/GmRelay.Bot/Program.cs`
-
-- [ ] **Step 1: Implement adapter**
-
-Implementation notes:
-
-- Parse Telegram chat/thread/message IDs from neutral string IDs with `long.Parse` and `int.Parse`.
-- Use `ParseMode.Html` for HTML text.
-- Map `PlatformMessageAction` URLs to `InlineKeyboardButton.WithUrl`.
-- Return a `PlatformMessageRef` with message IDs converted to strings.
-
-- [ ] **Step 2: Register adapter**
-
-Add `using GmRelay.Shared.Platform;` and register:
-
-```csharp
-builder.Services.AddSingleton<IPlatformMessenger, TelegramPlatformMessenger>();
-```
-
-- [ ] **Step 3: Run adapter source tests**
-
-Run:
-
-```powershell
-dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter TelegramPlatformMessengerSourceTests
-```
-
-Expected: some handler source tests still fail until Task 5.
-
-### Task 5: GREEN - Refactor Session Flows Through Adapter
-
-**Files:**
-- Modify target handler files listed in Task 3
-- Modify: `src/GmRelay.Bot/Features/Notifications/DirectSessionNotificationSender.cs`
-
-- [ ] **Step 1: Replace constructor dependencies**
-
-Use `IPlatformMessenger messenger` in target handlers for outbound operations. Keep `ITelegramBotClient` only where the handler still performs inbound Telegram-specific work that is out of scope, such as message deletion or forum topic creation.
-
-- [ ] **Step 2: Convert Telegram IDs to neutral platform objects**
-
-Use helper code equivalent to:
-
-```csharp
-private static PlatformGroup TelegramGroup(long chatId, string? title, int? threadId = null)
-    => new(
-        PlatformKind.Telegram,
-        chatId.ToString(System.Globalization.CultureInfo.InvariantCulture),
-        title ?? "Telegram chat",
-        ExternalChannelId: chatId.ToString(System.Globalization.CultureInfo.InvariantCulture),
-        ExternalThreadId: threadId?.ToString(System.Globalization.CultureInfo.InvariantCulture));
-
-private static PlatformUser TelegramUser(long telegramId, string displayName, string? username = null)
-    => new(
-        PlatformKind.Telegram,
-        telegramId.ToString(System.Globalization.CultureInfo.InvariantCulture),
-        displayName,
-        username);
-```
-
-- [ ] **Step 3: Replace schedule updates**
-
-Build `SessionBatchViewModel` as before, then call:
-
-```csharp
-await messenger.UpdateScheduleAsync(
-    new PlatformScheduleMessage(
-        group,
-        view,
-        new PlatformMessageRef(PlatformKind.Telegram, group.ExternalGroupId, group.ExternalThreadId, messageId.ToString(System.Globalization.CultureInfo.InvariantCulture))),
-    ct);
-```
-
-- [ ] **Step 4: Replace interaction replies**
-
-Use:
-
-```csharp
-await messenger.AnswerInteractionAsync(
-    new PlatformInteractionReply(command.CallbackQueryId, text, showAlert: false),
-    ct);
-```
-
-- [ ] **Step 5: Replace direct notifications**
-
-`DirectSessionNotificationSender` should become a small compatibility service over `IPlatformMessenger`:
-
-```csharp
-await messenger.SendPrivateMessageAsync(
-    new PlatformPrivateMessage(
-        new PlatformUser(PlatformKind.Telegram, recipient.TelegramId.ToString(CultureInfo.InvariantCulture), recipient.DisplayName, null),
-        htmlText),
-    ct);
-```
-
-- [ ] **Step 6: Replace calendar file sending**
-
-`ExportCalendarHandler` builds the same ICS bytes and calls `SendCalendarFileAsync`, preserving the subscription URL button as a `PlatformMessageAction`.
-
-- [ ] **Step 7: Run target source tests**
-
-Run:
-
-```powershell
-dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter TelegramPlatformMessengerSourceTests
-```
-
-Expected: `Passed`.
-
-### Task 6: Regression Tests
-
-**Files:**
-- Existing tests only unless a compiler failure exposes a missing using or changed behavior.
-
-- [ ] **Step 1: Run rendering and routing tests**
-
-Run:
-
-```powershell
-dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~Rendering|FullyQualifiedName~Telegram|FullyQualifiedName~RescheduleSession"
-```
-
-Expected: `Passed`.
-
-- [ ] **Step 2: Run all tests**
-
-Run:
-
-```powershell
-dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj
-```
-
-Expected: `Passed`.
-
-- [ ] **Step 3: Build solution**
-
-Run:
-
-```powershell
-dotnet build GM-Relay.slnx
-```
-
-Expected: `Build succeeded` with warnings treated as errors.
-
-### Task 7: Version Bump
-
-**Files:**
-- Modify: `Directory.Build.props`
-- Modify: `compose.yaml`
-- Modify: `.gitea/workflows/deploy.yml`
-- Modify: `src/GmRelay.Web/Components/Layout/NavMenu.razor`
-
-- [ ] **Step 1: Update all four version locations to `2.0.1`**
-- [ ] **Step 2: Verify sync**
-
-Run:
-
-```powershell
-rg -n "2\\.0\\.0|2\\.0\\.1" Directory.Build.props compose.yaml .gitea/workflows/deploy.yml src/GmRelay.Web/Components/Layout/NavMenu.razor
-```
-
-Expected: no `2.0.0` matches in these files and `2.0.1` appears in all required locations.
-
-### Task 8: Documentation Review
-
-**Files:**
-- Review: `README.md`
-- Review: `docs/adr/002-platform-neutral-batch-rendering.md`
-
-- [ ] **Step 1: Check README and ADR for platform contract accuracy**
-- [ ] **Step 2: Update docs if they now misrepresent platform-neutral responsibilities**
-
-Expected likely doc change: README currently lists current version as `v1.15.0`, which is already inconsistent with repo version `2.0.0`. If this PR bumps to `2.0.1`, update that line to `v2.0.1`.
-
-### Task 9: Commit, PR, CI, Review, Merge, Deploy, Release
-
-**Files:**
-- Stage only files intentionally changed for issue #24.
-
-- [ ] **Step 1: Create branch**
-
-```powershell
-git checkout -b codex/refactor/issue-24-platform-messenger
-```
-
-- [ ] **Step 2: Commit**
-
-```powershell
-git add src/GmRelay.Shared/Platform src/GmRelay.Bot tests/GmRelay.Bot.Tests Directory.Build.props compose.yaml .gitea/workflows/deploy.yml src/GmRelay.Web/Components/Layout/NavMenu.razor README.md docs/adr/002-platform-neutral-batch-rendering.md
-git commit -m "refactor: add platform messenger contracts"
-```
-
-- [ ] **Step 3: Push and create PR via Gitea**
-- [ ] **Step 4: Wait for PR CI and fix failures if any**
-- [ ] **Step 5: Run code review subagent and address findings**
-- [ ] **Step 6: Merge PR after CI and review**
-- [ ] **Step 7: Monitor deploy workflow**
-- [ ] **Step 8: Create release `v2.0.1` with Russian release notes**
-- [ ] **Step 9: Close issue #24 with PR and release links**
-
-## Self-Review
-
-- Spec coverage: all issue acceptance criteria map to Shared contracts, Telegram adapter, handler source tests, and build/test verification.
-- Placeholder scan: no `TBD`, `TODO`, or "fill later" placeholders are left in this plan.
-- Type consistency: all snippets use `GmRelay.Shared.Platform`, `PlatformKind.Telegram`, `PlatformMessageRef`, and `IPlatformMessenger` consistently.
-- Scope control: inbound Telegram update parsing remains out of scope; outbound schedule/private/interaction/calendar operations are in scope.

docs/superpowers/plans/2026-05-18-discord-netcord-gateway.md

@@ -1,731 +0,0 @@
-# Discord NetCord Gateway Implementation Plan
-
-> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** Add a separate `src/GmRelay.DiscordBot` worker that uses NetCord Gateway for Discord slash commands and component interactions while keeping Telegram dependencies isolated in `src/GmRelay.Bot`.
-
-**Architecture:** Create a new .NET worker project that references `GmRelay.ServiceDefaults` and `GmRelay.Shared`, validates `Discord:Token` during startup, registers NetCord gateway/application command/component services, and logs gateway lifecycle events through NetCord gateway handlers. Keep database connectivity aligned with the existing worker by registering the same `ConnectionStrings:gmrelaydb` `NpgsqlDataSource` pattern, but do not move Telegram code or dependencies.
-
-**Tech Stack:** .NET 10 worker, Aspire service defaults, NetCord.Hosting `1.0.0-alpha.489`, Npgsql `10.0.2`, xUnit, Docker Compose, Gitea Actions.
-
----
-
-## Issue
-
-- Gitea issue: `#26`, `feat: добавить src/GmRelay.DiscordBot на NetCord Gateway`
-- Labels: `type:feature`, `area:discord`, `area:infra`, `platform:discord`, `priority:p1`, `pending-approval`
-- Version bump: minor, `2.1.1` -> `2.2.0`
-- Branch: `feature/issue-26-discord-netcord-gateway`
-
-## Sources Checked
-
-- NetCord application commands guide: `https://netcord.dev/guides/services/application-commands/introduction.html`
-- NetCord intents guide: `https://netcord.dev/guides/events/intents.html`
-- NetCord gateway handler docs: `https://netcord.dev/docs/NetCord.Hosting.Gateway.html`
-- NuGet flat container for `NetCord.Hosting`: latest observed version `1.0.0-alpha.489`
-
-## File Structure
-
-- Create: `src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj` - Discord worker project and package references.
-- Create: `src/GmRelay.DiscordBot/Program.cs` - host composition, token validation, database registration, NetCord service registration.
-- Create: `src/GmRelay.DiscordBot/DiscordOptions.cs` - strongly typed Discord token/options validation.
-- Create: `src/GmRelay.DiscordBot/Infrastructure/Logging/SecretRedactor.cs` - Discord-local startup redaction without referencing the Telegram worker project.
-- Create: `src/GmRelay.DiscordBot/Infrastructure/Logging/DiscordGatewayLifecycleLogger.cs` - NetCord gateway lifecycle handler for ready/connect/resume/disconnect/close/rate-limit events where available.
-- Create: `src/GmRelay.DiscordBot/Dockerfile` - publish and runtime image for the Discord worker.
-- Modify: `GM-Relay.slnx` - include the new project.
-- Modify: `src/GmRelay.AppHost/GmRelay.AppHost.csproj` - reference the Discord worker for Aspire orchestration.
-- Modify: `src/GmRelay.AppHost/Program.cs` - add `discord` project with PostgreSQL reference.
-- Modify: `tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj` - reference the Discord worker project.
-- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs` - source-level tests for solution inclusion, Docker/Compose/CI wiring, and Telegram isolation.
-- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordOptionsTests.cs` - unit tests for token validation.
-- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs` - source-level startup tests for NetCord registration, service defaults, and PostgreSQL connection requirements.
-- Modify: `compose.yaml` - add `discord` service and versioned image tag.
-- Modify: `.gitea/workflows/deploy.yml` - build/push/scan/pull Discord image and include `DISCORD_BOT_TOKEN` in `.env`.
-- Modify: `.gitea/workflows/pr-checks.yml` - build the Discord project in PR checks.
-- Modify: `Directory.Build.props` - version `2.2.0`.
-- Modify: `src/GmRelay.Web/Components/Layout/NavMenu.razor` - visible version `v2.2.0`.
-- Generated by restore: `src/GmRelay.DiscordBot/packages.lock.json`.
-- Generated by restore: updates to `tests/GmRelay.Bot.Tests/packages.lock.json` and `src/GmRelay.AppHost/packages.lock.json`.
-
-## TDD Plan
-
-### Task 1: Project Presence And Telegram Isolation
-
-**Files:**
-- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs`
-- Modify: `GM-Relay.slnx`
-- Create: `src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj`
-- Create: `src/GmRelay.DiscordBot/Program.cs`
-
-- [ ] **Step 1: Write the failing test**
-
-```csharp
-using System;
-using System.IO;
-
-namespace GmRelay.Bot.Tests.Discord;
-
-public sealed class DiscordProjectStructureTests
-{
-    private static string GetRepoRoot()
-    {
-        var dir = AppContext.BaseDirectory;
-        while (!string.IsNullOrEmpty(dir) && !File.Exists(Path.Combine(dir, "Directory.Build.props")))
-        {
-            dir = Directory.GetParent(dir)?.FullName;
-        }
-
-        return dir ?? throw new InvalidOperationException("Could not find repo root");
-    }
-
-    [Fact]
-    public void Solution_ShouldIncludeDiscordWorkerProject()
-    {
-        var repoRoot = GetRepoRoot();
-        var solution = File.ReadAllText(Path.Combine(repoRoot, "GM-Relay.slnx"));
-
-        Assert.Contains("src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj", solution);
-    }
-
-    [Fact]
-    public void DiscordWorkerProject_ShouldExistWithoutTelegramDependency()
-    {
-        var repoRoot = GetRepoRoot();
-        var projectPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "GmRelay.DiscordBot.csproj");
-
-        Assert.True(File.Exists(projectPath), "Discord worker project should exist.");
-
-        var project = File.ReadAllText(projectPath);
-        Assert.Contains("Microsoft.NET.Sdk.Worker", project);
-        Assert.Contains("NetCord.Hosting", project);
-        Assert.Contains("GmRelay.ServiceDefaults.csproj", project);
-        Assert.Contains("GmRelay.Shared.csproj", project);
-        Assert.DoesNotContain("Telegram.Bot", project);
-        Assert.DoesNotContain("GmRelay.Bot.csproj", project);
-    }
-
-    [Fact]
-    public void TelegramWorkerProject_ShouldNotReferenceNetCord()
-    {
-        var repoRoot = GetRepoRoot();
-        var project = File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.Bot", "GmRelay.Bot.csproj"));
-
-        Assert.DoesNotContain("NetCord", project, StringComparison.OrdinalIgnoreCase);
-    }
-}
-```
-
-- [ ] **Step 2: Run the test to verify it fails**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordProjectStructureTests`
-
-Expected: FAIL because `GM-Relay.slnx` does not include `src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj` and the project file does not exist.
-
-- [ ] **Step 3: Write minimal implementation**
-
-Create `src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj`:
-
-```xml
-<Project Sdk="Microsoft.NET.Sdk.Worker">
-
-  <PropertyGroup>
-    <TargetFramework>net10.0</TargetFramework>
-    <LangVersion>preview</LangVersion>
-    <Nullable>enable</Nullable>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <UserSecretsId>dotnet-GmRelay.DiscordBot-issue-26</UserSecretsId>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Aspire.Npgsql" Version="13.2.2" />
-    <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.5" />
-    <PackageReference Include="NetCord.Hosting" Version="1.0.0-alpha.489" />
-    <PackageReference Include="Npgsql" Version="10.0.2" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\GmRelay.ServiceDefaults\GmRelay.ServiceDefaults.csproj" />
-    <ProjectReference Include="..\GmRelay.Shared\GmRelay.Shared.csproj" />
-  </ItemGroup>
-</Project>
-```
-
-Add this project to `GM-Relay.slnx` inside `/src/`:
-
-```xml
-<Project Path="src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj" />
-```
-
-Create temporary minimal `src/GmRelay.DiscordBot/Program.cs`:
-
-```csharp
-var builder = Host.CreateApplicationBuilder(args);
-builder.AddServiceDefaults();
-await builder.Build().RunAsync();
-```
-
-- [ ] **Step 4: Run the test to verify it passes**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordProjectStructureTests`
-
-Expected: PASS.
-
-### Task 2: Token Validation
-
-**Files:**
-- Modify: `tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj`
-- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordOptionsTests.cs`
-- Create: `src/GmRelay.DiscordBot/DiscordOptions.cs`
-
-- [ ] **Step 1: Write the failing test**
-
-Add the project reference to `tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj`:
-
-```xml
-<ProjectReference Include="..\..\src\GmRelay.DiscordBot\GmRelay.DiscordBot.csproj" />
-```
-
-Create `tests/GmRelay.Bot.Tests/Discord/DiscordOptionsTests.cs`:
-
-```csharp
-using GmRelay.DiscordBot;
-
-namespace GmRelay.Bot.Tests.Discord;
-
-public sealed class DiscordOptionsTests
-{
-    [Theory]
-    [InlineData(null)]
-    [InlineData("")]
-    [InlineData("   ")]
-    public void Validate_ShouldRejectMissingToken(string? token)
-    {
-        var options = new DiscordOptions { Token = token };
-
-        var exception = Assert.Throws<InvalidOperationException>(options.Validate);
-
-        Assert.Contains("Discord:Token is required", exception.Message);
-        Assert.Contains("Discord__Token", exception.Message);
-    }
-
-    [Fact]
-    public void Validate_ShouldAcceptConfiguredToken()
-    {
-        var options = new DiscordOptions { Token = "configured-token" };
-
-        options.Validate();
-    }
-}
-```
-
-- [ ] **Step 2: Run the test to verify it fails**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordOptionsTests`
-
-Expected: FAIL at compile time because `GmRelay.DiscordBot.DiscordOptions` is not defined.
-
-- [ ] **Step 3: Write minimal implementation**
-
-Create `src/GmRelay.DiscordBot/DiscordOptions.cs`:
-
-```csharp
-namespace GmRelay.DiscordBot;
-
-public sealed class DiscordOptions
-{
-    public string? Token { get; init; }
-
-    public void Validate()
-    {
-        if (string.IsNullOrWhiteSpace(Token))
-        {
-            throw new InvalidOperationException(
-                "Discord:Token is required. Set via environment variable Discord__Token or user secrets.");
-        }
-    }
-}
-```
-
-- [ ] **Step 4: Run the test to verify it passes**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordOptionsTests`
-
-Expected: PASS.
-
-### Task 3: Startup Wiring For Service Defaults, PostgreSQL, NetCord, And Slash Commands
-
-**Files:**
-- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs`
-- Modify: `src/GmRelay.DiscordBot/Program.cs`
-
-- [ ] **Step 1: Write the failing test**
-
-Create `tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs`:
-
-```csharp
-using System;
-using System.IO;
-
-namespace GmRelay.Bot.Tests.Discord;
-
-public sealed class DiscordStartupTests
-{
-    private static string GetRepoRoot()
-    {
-        var dir = AppContext.BaseDirectory;
-        while (!string.IsNullOrEmpty(dir) && !File.Exists(Path.Combine(dir, "Directory.Build.props")))
-        {
-            dir = Directory.GetParent(dir)?.FullName;
-        }
-
-        return dir ?? throw new InvalidOperationException("Could not find repo root");
-    }
-
-    [Fact]
-    public void Program_ShouldValidateDiscordTokenBeforeRunning()
-    {
-        var program = ReadProgram();
-
-        Assert.Contains("GetRequiredSection(\"Discord\")", program);
-        Assert.Contains("DiscordOptions", program);
-        Assert.Contains(".Validate()", program);
-    }
-
-    [Fact]
-    public void Program_ShouldRegisterServiceDefaultsAndPostgresDataSource()
-    {
-        var program = ReadProgram();
-
-        Assert.Contains("builder.AddServiceDefaults()", program);
-        Assert.Contains("ConnectionStrings:gmrelaydb is required", program);
-        Assert.Contains("NpgsqlDataSource", program);
-        Assert.Contains("SecretRedactor.RedactConnectionString", program);
-    }
-
-    [Fact]
-    public void Program_ShouldRegisterNetCordGatewayApplicationCommandsAndComponents()
-    {
-        var program = ReadProgram();
-
-        Assert.Contains(".AddDiscordGateway", program);
-        Assert.Contains(".AddApplicationCommands", program);
-        Assert.Contains(".AddComponentInteractions", program);
-        Assert.Contains(".AddGatewayHandlers", program);
-        Assert.Contains("AddSlashCommand", program);
-    }
-
-    private static string ReadProgram()
-    {
-        var repoRoot = GetRepoRoot();
-        return File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Program.cs"));
-    }
-}
-```
-
-- [ ] **Step 2: Run the test to verify it fails**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordStartupTests`
-
-Expected: FAIL because `Program.cs` does not validate `Discord:Token`, register `NpgsqlDataSource`, or register NetCord services yet.
-
-- [ ] **Step 3: Write minimal implementation**
-
-Replace `src/GmRelay.DiscordBot/Program.cs` with host composition that:
-
-```csharp
-using GmRelay.DiscordBot;
-using GmRelay.DiscordBot.Infrastructure.Logging;
-using NetCord.Gateway;
-using NetCord.Hosting.Gateway;
-using NetCord.Hosting.Services.ApplicationCommands;
-using NetCord.Hosting.Services.ComponentInteractions;
-using Npgsql;
-
-var builder = Host.CreateApplicationBuilder(args);
-
-builder.AddServiceDefaults();
-
-var discordOptions = builder.Configuration
-    .GetRequiredSection("Discord")
-    .Get<DiscordOptions>() ?? new DiscordOptions();
-discordOptions.Validate();
-
-builder.Services.AddSingleton(discordOptions);
-
-builder.Services.AddSingleton<NpgsqlDataSource>(sp =>
-{
-    var config = sp.GetRequiredService<IConfiguration>();
-    var loggerFactory = sp.GetRequiredService<ILoggerFactory>();
-    var connectionString = config.GetConnectionString("gmrelaydb")
-        ?? throw new InvalidOperationException(
-            "ConnectionStrings:gmrelaydb is required. Set via environment variable ConnectionStrings__gmrelaydb.");
-
-    var logger = loggerFactory.CreateLogger("GmRelay.DiscordBot.Startup");
-    logger.LogInformation(
-        "Configured PostgreSQL data source with connection string {ConnectionString}",
-        SecretRedactor.RedactConnectionString(connectionString));
-
-    return NpgsqlDataSource.Create(connectionString);
-});
-
-builder.Services
-    .AddDiscordGateway(options =>
-    {
-        options.Token = discordOptions.Token;
-        options.Intents = GatewayIntents.Guilds;
-    })
-    .AddApplicationCommands()
-    .AddComponentInteractions()
-    .AddGatewayHandlers(typeof(Program).Assembly);
-
-var host = builder.Build();
-
-host.AddSlashCommand("ping", "Checks whether GM-Relay Discord is online.", () => "Pong!");
-
-await host.RunAsync();
-```
-
-Use the Discord-local `SecretRedactor` namespace instead of `GmRelay.Bot.Infrastructure.Logging` so the new project does not reference the Telegram worker.
-
-Create `src/GmRelay.DiscordBot/Infrastructure/Logging/SecretRedactor.cs`:
-
-```csharp
-using System.Text.RegularExpressions;
-
-namespace GmRelay.DiscordBot.Infrastructure.Logging;
-
-internal static partial class SecretRedactor
-{
-    public static string RedactConnectionString(string connectionString)
-    {
-        return PasswordPattern().Replace(connectionString, "$1***");
-    }
-
-    [GeneratedRegex(@"(?i)(Password\s*=\s*)[^;]+")]
-    private static partial Regex PasswordPattern();
-}
-```
-
-If `GatewayClientOptions.Token` does not accept `string`, adjust to NetCord's required token type after compile feedback while preserving the tests' intent.
-
-- [ ] **Step 4: Run the test to verify it passes**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordStartupTests`
-
-Expected: PASS.
-
-### Task 4: Gateway Lifecycle Logging
-
-**Files:**
-- Modify: `tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs`
-- Create: `src/GmRelay.DiscordBot/Infrastructure/Logging/DiscordGatewayLifecycleLogger.cs`
-
-- [ ] **Step 1: Write the failing test**
-
-Add to `DiscordStartupTests.cs`:
-
-```csharp
-[Fact]
-public void LifecycleLogger_ShouldLogGatewayLifecycleEventsWithoutTokenValues()
-{
-    var repoRoot = GetRepoRoot();
-    var loggerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Infrastructure", "Logging", "DiscordGatewayLifecycleLogger.cs");
-
-    Assert.True(File.Exists(loggerPath), "Discord gateway lifecycle logger should exist.");
-
-    var logger = File.ReadAllText(loggerPath);
-    Assert.Contains("IReadyGatewayHandler", logger);
-    Assert.Contains("IDisconnectGatewayHandler", logger);
-    Assert.Contains("IResumeGatewayHandler", logger);
-    Assert.Contains("LogInformation", logger);
-    Assert.DoesNotContain("Token", logger);
-}
-```
-
-- [ ] **Step 2: Run the test to verify it fails**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter LifecycleLogger_ShouldLogGatewayLifecycleEventsWithoutTokenValues`
-
-Expected: FAIL because `DiscordGatewayLifecycleLogger.cs` does not exist.
-
-- [ ] **Step 3: Write minimal implementation**
-
-Create `src/GmRelay.DiscordBot/Infrastructure/Logging/DiscordGatewayLifecycleLogger.cs` using the concrete NetCord handler signatures from the installed `NetCord.Hosting` package. Minimum behavior:
-
-```csharp
-using Microsoft.Extensions.Logging;
-using NetCord.Gateway;
-using NetCord.Hosting.Gateway;
-
-namespace GmRelay.DiscordBot.Infrastructure.Logging;
-
-public sealed class DiscordGatewayLifecycleLogger(
-    ILogger<DiscordGatewayLifecycleLogger> logger)
-    : IReadyGatewayHandler,
-      IDisconnectGatewayHandler,
-      IResumeGatewayHandler
-{
-    public ValueTask HandleAsync(ReadyEventArgs arg)
-    {
-        logger.LogInformation("Discord gateway ready as application {ApplicationId}", arg.Application.Id);
-        return ValueTask.CompletedTask;
-    }
-
-    public ValueTask HandleAsync(DisconnectEventArgs arg)
-    {
-        logger.LogWarning("Discord gateway disconnected with close status {CloseStatus}", arg.CloseStatus);
-        return ValueTask.CompletedTask;
-    }
-
-    public ValueTask HandleAsync()
-    {
-        logger.LogInformation("Discord gateway session resumed");
-        return ValueTask.CompletedTask;
-    }
-}
-```
-
-If interface signatures differ in `1.0.0-alpha.489`, inspect the package XML/docs and adjust the handlers to compile while keeping ready/disconnect/resume logging and never logging token values.
-
-- [ ] **Step 4: Run the test to verify it passes**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter LifecycleLogger_ShouldLogGatewayLifecycleEventsWithoutTokenValues`
-
-Expected: PASS.
-
-### Task 5: Runtime Container, Compose, AppHost, And CI Wiring
-
-**Files:**
-- Modify: `tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs`
-- Create: `src/GmRelay.DiscordBot/Dockerfile`
-- Modify: `compose.yaml`
-- Modify: `src/GmRelay.AppHost/GmRelay.AppHost.csproj`
-- Modify: `src/GmRelay.AppHost/Program.cs`
-- Modify: `.gitea/workflows/pr-checks.yml`
-- Modify: `.gitea/workflows/deploy.yml`
-
-- [ ] **Step 1: Write the failing test**
-
-Add to `DiscordProjectStructureTests.cs`:
-
-```csharp
-[Fact]
-public void RuntimeWiring_ShouldIncludeDiscordServiceWithoutCouplingTelegram()
-{
-    var repoRoot = GetRepoRoot();
-    var compose = File.ReadAllText(Path.Combine(repoRoot, "compose.yaml"));
-    var appHostProject = File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.AppHost", "GmRelay.AppHost.csproj"));
-    var appHostProgram = File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.AppHost", "Program.cs"));
-    var prChecks = File.ReadAllText(Path.Combine(repoRoot, ".gitea", "workflows", "pr-checks.yml"));
-    var deploy = File.ReadAllText(Path.Combine(repoRoot, ".gitea", "workflows", "deploy.yml"));
-
-    Assert.Contains("gmrelay-discord-bot:2.2.0", compose);
-    Assert.Contains("Discord__Token=${DISCORD_BOT_TOKEN:?Set DISCORD_BOT_TOKEN in .env}", compose);
-    Assert.Contains("src/GmRelay.DiscordBot/Dockerfile", deploy);
-    Assert.Contains("DISCORD_BOT_TOKEN", deploy);
-    Assert.Contains("dotnet build src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj --no-restore", prChecks);
-    Assert.Contains("GmRelay.DiscordBot.csproj", appHostProject);
-    Assert.Contains("Projects.GmRelay_DiscordBot", appHostProgram);
-}
-```
-
-- [ ] **Step 2: Run the test to verify it fails**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter RuntimeWiring_ShouldIncludeDiscordServiceWithoutCouplingTelegram`
-
-Expected: FAIL because runtime wiring is not present.
-
-- [ ] **Step 3: Write minimal implementation**
-
-Create `src/GmRelay.DiscordBot/Dockerfile` modeled after `src/GmRelay.Bot/Dockerfile`, with project copy/restore for `GmRelay.DiscordBot`, `GmRelay.ServiceDefaults`, and `GmRelay.Shared`, and entrypoint `./GmRelay.DiscordBot`.
-
-Add `discord` service to `compose.yaml`:
-
-```yaml
-  discord:
-    image: git.codeanddice.ru/toutsu/gmrelay-discord-bot:2.2.0
-    restart: always
-    depends_on:
-      db:
-        condition: service_healthy
-    environment:
-      - "ConnectionStrings__gmrelaydb=Host=db;Port=5432;Database=gmrelay_db;Username=gmrelay;Password=${POSTGRES_PASSWORD:?Set POSTGRES_PASSWORD in .env}"
-      - "Discord__Token=${DISCORD_BOT_TOKEN:?Set DISCORD_BOT_TOKEN in .env}"
-    networks:
-      - gmrelay
-```
-
-Add Discord project reference to `src/GmRelay.AppHost/GmRelay.AppHost.csproj`:
-
-```xml
-<ProjectReference Include="..\GmRelay.DiscordBot\GmRelay.DiscordBot.csproj" />
-```
-
-Add Discord service to `src/GmRelay.AppHost/Program.cs`:
-
-```csharp
-builder.AddProject<Projects.GmRelay_DiscordBot>("discord")
-    .WithReference(postgres)
-    .WaitFor(postgres);
-```
-
-Update `.gitea/workflows/pr-checks.yml` with:
-
-```yaml
-      - name: Build Discord Bot (compile check, includes SAST)
-        run: dotnet build src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj --no-restore
-```
-
-Update `.gitea/workflows/deploy.yml` to build, push, scan, pull, and deploy `git.codeanddice.ru/toutsu/gmrelay-discord-bot:${{ env.VERSION }}` and write `DISCORD_BOT_TOKEN=${{ secrets.DISCORD_BOT_TOKEN }}` to `.env`.
-
-- [ ] **Step 4: Run the test to verify it passes**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter RuntimeWiring_ShouldIncludeDiscordServiceWithoutCouplingTelegram`
-
-Expected: PASS.
-
-### Task 6: Version Synchronization
-
-**Files:**
-- Modify: `tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs`
-- Modify: `Directory.Build.props`
-- Modify: `compose.yaml`
-- Modify: `.gitea/workflows/deploy.yml`
-- Modify: `src/GmRelay.Web/Components/Layout/NavMenu.razor`
-
-- [ ] **Step 1: Write the failing test**
-
-Add to `DiscordProjectStructureTests.cs`:
-
-```csharp
-[Fact]
-public void Version_ShouldBeSynchronizedForDiscordFeatureRelease()
-{
-    var repoRoot = GetRepoRoot();
-
-    Assert.Contains("<Version>2.2.0</Version>", File.ReadAllText(Path.Combine(repoRoot, "Directory.Build.props")));
-    Assert.Contains("VERSION: 2.2.0", File.ReadAllText(Path.Combine(repoRoot, ".gitea", "workflows", "deploy.yml")));
-    Assert.Contains("gmrelay-bot:2.2.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
-    Assert.Contains("gmrelay-web:2.2.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
-    Assert.Contains("gmrelay-discord-bot:2.2.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
-    Assert.Contains("v2.2.0", File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.Web", "Components", "Layout", "NavMenu.razor")));
-}
-```
-
-- [ ] **Step 2: Run the test to verify it fails**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter Version_ShouldBeSynchronizedForDiscordFeatureRelease`
-
-Expected: FAIL because current version is `2.1.1`.
-
-- [ ] **Step 3: Write minimal implementation**
-
-Update:
-- `Directory.Build.props`: `<Version>2.2.0</Version>`
-- `.gitea/workflows/deploy.yml`: `VERSION: 2.2.0`
-- `compose.yaml`: `gmrelay-bot:2.2.0`, `gmrelay-web:2.2.0`, `gmrelay-discord-bot:2.2.0`
-- `src/GmRelay.Web/Components/Layout/NavMenu.razor`: `v2.2.0`
-
-- [ ] **Step 4: Run the test to verify it passes**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter Version_ShouldBeSynchronizedForDiscordFeatureRelease`
-
-Expected: PASS.
-
-### Task 7: Restore, Format, Build, And Full Test Verification
-
-**Files:**
-- Generated/updated: `src/GmRelay.DiscordBot/packages.lock.json`
-- Generated/updated: `tests/GmRelay.Bot.Tests/packages.lock.json`
-- Generated/updated: `src/GmRelay.AppHost/packages.lock.json`
-- Any code formatting changes required by `dotnet format`
-
-- [ ] **Step 1: Restore lock files**
-
-Run: `dotnet restore GM-Relay.slnx`
-
-Expected: restore succeeds and creates/updates lock files for the new project references and NetCord dependency.
-
-- [ ] **Step 2: Run targeted tests**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~Discord`
-
-Expected: all Discord tests pass.
-
-- [ ] **Step 3: Run full tests**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --verbosity normal`
-
-Expected: all tests pass.
-
-- [ ] **Step 4: Run release build**
-
-Run: `dotnet build GM-Relay.slnx -c Release`
-
-Expected: solution build succeeds and includes `src/GmRelay.DiscordBot`.
-
-- [ ] **Step 5: Run format check**
-
-Run: `dotnet format --verify-no-changes --verbosity diagnostic`
-
-Expected: no formatting changes required.
-
-- [ ] **Step 6: Inspect diff for secrets**
-
-Run: `git diff --check`
-
-Expected: no whitespace errors and no Discord token value in tracked files.
-
-Run: `git diff -- . ':!*.lock.json'`
-
-Expected: diff contains configuration variable names such as `Discord__Token` and `DISCORD_BOT_TOKEN`, but not a real token value.
-
-### Task 8: Commit, PR, CI, Deploy, Release, Issue Closure
-
-**Files:**
-- All intended implementation, test, lock, workflow, compose, and version files.
-
-- [ ] **Step 1: Create commit**
-
-Run:
-
-```powershell
-git status --short
-git add GM-Relay.slnx Directory.Build.props compose.yaml .gitea/workflows/deploy.yml .gitea/workflows/pr-checks.yml src/GmRelay.AppHost src/GmRelay.DiscordBot src/GmRelay.Web/Components/Layout/NavMenu.razor tests/GmRelay.Bot.Tests
-git commit -m "feat: add Discord NetCord gateway worker"
-```
-
-Expected: only intended files are staged and committed. Do not stage untracked `CLAUDE.md`.
-
-- [ ] **Step 2: Push branch and open PR**
-
-Run: `git push -u origin feature/issue-26-discord-netcord-gateway`
-
-Create Gitea PR to `main` with:
-- Summary of Discord worker, token validation, runtime wiring, and version bump.
-- Test plan showing targeted Discord tests, full tests, release build, format, and secret diff inspection.
-- Link to issue `#26`.
-
-- [ ] **Step 3: Store Discord token as a Gitea Actions secret**
-
-Use Gitea Actions configuration to create or update repository secret `DISCORD_BOT_TOKEN` with the user-provided Discord bot token.
-
-Expected: token is stored only as an Actions secret. The token value is not written to source files, plan files, logs, PR text, release notes, or commits.
-
-- [ ] **Step 4: Monitor CI**
-
-Use Gitea Actions run reads until PR checks finish. If CI fails, inspect logs, fix with TDD where the failure is code behavior, push again, and re-check.
-
-- [ ] **Step 5: Review, merge, deploy, release**
-
-After CI passes and review is approved:
-- Merge PR.
-- Monitor deploy workflow on `main`.
-- Create release `v2.2.0` with Russian release notes.
-- Close issue `#26` with a comment linking PR and release.
-
-## Self-Review
-
-- Spec coverage: Project creation, NetCord Gateway, slash/component service registration, `Discord__Token`, PostgreSQL service defaults, lifecycle logging, Telegram isolation, solution build, compose/deploy integration, and version sync are covered.
-- Placeholder scan: No task uses `TBD`, `TODO`, or an unspecified "add tests" instruction.
-- Type consistency: Test class names and file paths are consistent across tasks; NetCord lifecycle handler signatures are explicitly marked for compile-driven adjustment because the package is prerelease and must be verified against installed `1.0.0-alpha.489`.

docs/superpowers/plans/2026-05-18-platform-neutral-join-leave.md

@@ -1,599 +0,0 @@
-# Platform-Neutral Join Leave Implementation Plan
-
-> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** Implement Gitea issue #25 by making join/leave session interactions use platform-neutral command models while preserving Telegram callback behavior, seat limits, and waitlist semantics.
-
-**Architecture:** Telegram callback routing remains in `UpdateRouter`, but it becomes an adapter that converts callback data into `PlatformUser`, `PlatformGroup`, and `PlatformMessageRef` values. `JoinSessionHandler` and `LeaveSessionHandler` operate on those neutral values, persist players by `(platform, external_user_id)`, and update schedules through `IPlatformMessenger`.
-
-**Tech Stack:** .NET 10, xUnit, Dapper, Npgsql, Gitea Actions.
-
----
-
-## Issue Context
-
-- Issue: `#25 refactor: obobshchit JoinSession i LeaveSession pod platform-neutral interactions`
-- Labels: `area:bot`, `area:platform`, `area:shared`, `platform:multi`, `type:refactor`
-- Version bump: patch, `2.1.0` -> `2.1.1`. The issue is labeled refactor, not breaking; do not use a major bump without explicit approval.
-- Existing untracked file: `CLAUDE.md`; do not stage or modify it.
-
-## File Map
-
-- Create: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionCommandTests.cs`
-  - Reflection tests proving join/leave command records expose neutral properties and no Telegram-specific identity/message fields.
-- Create: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionSqlTests.cs`
-  - Source-level regression tests for handler SQL and messenger boundaries.
-- Modify: `tests/GmRelay.Bot.Tests/Infrastructure/Database/PlatformIdentityMigrationTests.cs`
-  - Add a migration test for nullable legacy `players.telegram_id`, required for non-Telegram player inserts.
-- Create: `src/GmRelay.Bot/Migrations/V017__allow_platform_neutral_players.sql`
-  - Drop `NOT NULL` from legacy Telegram-only player columns.
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs`
-  - Change `JoinSessionCommand` to neutral properties and query/upsert players by platform identity.
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs`
-  - Change `LeaveSessionCommand` to neutral properties and find participants by platform identity.
-- Modify: `src/GmRelay.Bot/Infrastructure/Telegram/UpdateRouter.cs`
-  - Convert Telegram callback data into neutral command values using `TelegramPlatformIds`.
-- Modify: version files after implementation:
-  - `Directory.Build.props`
-  - `compose.yaml`
-  - `.gitea/workflows/deploy.yml`
-  - `src/GmRelay.Web/Components/Layout/NavMenu.razor`
-
-## Task 1: RED - Command Model Tests
-
-**Files:**
-- Create: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionCommandTests.cs`
-
-- [ ] **Step 1: Write failing command-shape tests**
-
-```csharp
-using GmRelay.Bot.Features.Sessions.CreateSession;
-using GmRelay.Shared.Platform;
-
-namespace GmRelay.Bot.Tests.Features.Sessions.CreateSession;
-
-public sealed class PlatformNeutralSessionInteractionCommandTests
-{
-    [Fact]
-    public void JoinSessionCommand_ShouldExposePlatformNeutralInteractionContext()
-    {
-        AssertProperty<JoinSessionCommand>("SessionId", typeof(Guid));
-        AssertProperty<JoinSessionCommand>("User", typeof(PlatformUser));
-        AssertProperty<JoinSessionCommand>("InteractionId", typeof(string));
-        AssertProperty<JoinSessionCommand>("Group", typeof(PlatformGroup));
-        AssertProperty<JoinSessionCommand>("ScheduleMessage", typeof(PlatformMessageRef));
-        AssertNoTelegramSpecificProperties<JoinSessionCommand>();
-    }
-
-    [Fact]
-    public void LeaveSessionCommand_ShouldExposePlatformNeutralInteractionContext()
-    {
-        AssertProperty<LeaveSessionCommand>("SessionId", typeof(Guid));
-        AssertProperty<LeaveSessionCommand>("User", typeof(PlatformUser));
-        AssertProperty<LeaveSessionCommand>("InteractionId", typeof(string));
-        AssertProperty<LeaveSessionCommand>("Group", typeof(PlatformGroup));
-        AssertProperty<LeaveSessionCommand>("ScheduleMessage", typeof(PlatformMessageRef));
-        AssertNoTelegramSpecificProperties<LeaveSessionCommand>();
-    }
-
-    private static void AssertProperty<T>(string name, Type expectedType)
-    {
-        var property = Assert.Single(typeof(T).GetProperties(), property => property.Name == name);
-
-        Assert.Equal(expectedType, property.PropertyType);
-    }
-
-    private static void AssertNoTelegramSpecificProperties<T>()
-    {
-        var names = typeof(T).GetProperties().Select(property => property.Name).ToArray();
-
-        Assert.DoesNotContain(names, name => name.Contains("Telegram", StringComparison.Ordinal));
-        Assert.DoesNotContain("ChatId", names);
-        Assert.DoesNotContain("MessageId", names);
-        Assert.DoesNotContain("TelegramUserId", names);
-        Assert.DoesNotContain("TelegramUsername", names);
-    }
-}
-```
-
-- [ ] **Step 2: Verify RED**
-
-Run:
-
-```powershell
-dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter PlatformNeutralSessionInteractionCommandTests
-```
-
-Expected: FAIL because `JoinSessionCommand` and `LeaveSessionCommand` still expose `TelegramUserId`, `ChatId`, and `MessageId`, and do not expose `User`, `Group`, or `ScheduleMessage`.
-
-## Task 2: RED - SQL and Boundary Tests
-
-**Files:**
-- Create: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionSqlTests.cs`
-- Modify: `tests/GmRelay.Bot.Tests/Infrastructure/Database/PlatformIdentityMigrationTests.cs`
-
-- [ ] **Step 1: Write failing handler source tests**
-
-```csharp
-namespace GmRelay.Bot.Tests.Features.Sessions.CreateSession;
-
-public sealed class PlatformNeutralSessionInteractionSqlTests
-{
-    [Fact]
-    public async Task JoinSessionHandler_ShouldPersistPlayersByPlatformIdentity()
-    {
-        var handler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs");
-
-        Assert.Contains("platform, external_user_id", handler, StringComparison.Ordinal);
-        Assert.Contains("ON CONFLICT (platform, external_user_id)", handler, StringComparison.Ordinal);
-        Assert.Contains("ExternalUserId", handler, StringComparison.Ordinal);
-        Assert.Contains("ExternalUsername", handler, StringComparison.Ordinal);
-        Assert.DoesNotContain("TelegramPlatformIds.", handler, StringComparison.Ordinal);
-        Assert.DoesNotContain("command.TelegramUserId", handler, StringComparison.Ordinal);
-        Assert.DoesNotContain("command.TelegramUsername", handler, StringComparison.Ordinal);
-    }
-
-    [Fact]
-    public async Task LeaveSessionHandler_ShouldFindParticipantsByPlatformIdentity()
-    {
-        var handler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs");
-
-        Assert.Contains("p.platform = @Platform", handler, StringComparison.Ordinal);
-        Assert.Contains("p.external_user_id = @ExternalUserId", handler, StringComparison.Ordinal);
-        Assert.DoesNotContain("p.telegram_id = @TelegramUserId", handler, StringComparison.Ordinal);
-        Assert.DoesNotContain("TelegramPlatformIds.", handler, StringComparison.Ordinal);
-        Assert.DoesNotContain("command.TelegramUserId", handler, StringComparison.Ordinal);
-    }
-
-    [Fact]
-    public async Task SessionInteractionHandlers_ShouldUpdateSchedulesThroughCommandMessageReference()
-    {
-        var joinHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs");
-        var leaveHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs");
-
-        Assert.Contains("new PlatformScheduleMessage(", joinHandler, StringComparison.Ordinal);
-        Assert.Contains("command.Group", joinHandler, StringComparison.Ordinal);
-        Assert.Contains("command.ScheduleMessage", joinHandler, StringComparison.Ordinal);
-        Assert.Contains("new PlatformScheduleMessage(", leaveHandler, StringComparison.Ordinal);
-        Assert.Contains("command.Group", leaveHandler, StringComparison.Ordinal);
-        Assert.Contains("command.ScheduleMessage", leaveHandler, StringComparison.Ordinal);
-    }
-
-    private static async Task<string> ReadRepositoryFileAsync(string relativePath)
-    {
-        var directory = new DirectoryInfo(AppContext.BaseDirectory);
-        while (directory is not null)
-        {
-            var candidate = Path.Combine(directory.FullName, relativePath);
-            if (File.Exists(candidate))
-            {
-                return await File.ReadAllTextAsync(candidate);
-            }
-
-            directory = directory.Parent;
-        }
-
-        throw new FileNotFoundException($"Could not locate repository file '{relativePath}'.");
-    }
-}
-```
-
-- [ ] **Step 2: Add failing migration assertion**
-
-Append to `PlatformIdentityMigrationTests`:
-
-```csharp
-[Fact]
-public async Task MigrationV017_ShouldAllowPlayersWithoutLegacyTelegramId()
-{
-    var migration = await ReadRepositoryFileAsync("src/GmRelay.Bot/Migrations/V017__allow_platform_neutral_players.sql");
-
-    Assert.Contains("ALTER TABLE players", migration, StringComparison.Ordinal);
-    Assert.Contains("telegram_id DROP NOT NULL", migration, StringComparison.Ordinal);
-}
-```
-
-- [ ] **Step 3: Verify RED**
-
-Run:
-
-```powershell
-dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter "PlatformNeutralSessionInteractionSqlTests|MigrationV017_ShouldAllowPlayersWithoutLegacyTelegramId"
-```
-
-Expected: FAIL because handlers still use Telegram-specific properties and the V017 migration file does not exist.
-
-## Task 3: GREEN - Add Migration
-
-**Files:**
-- Create: `src/GmRelay.Bot/Migrations/V017__allow_platform_neutral_players.sql`
-
-- [ ] **Step 1: Create the migration**
-
-```sql
--- =============================================================
--- V017: Allow platform-neutral players
--- =============================================================
--- Legacy Telegram identity columns remain for backward compatibility,
--- but non-Telegram platform users do not have Telegram ids.
--- =============================================================
-
-ALTER TABLE players
-    ALTER COLUMN telegram_id DROP NOT NULL;
-```
-
-- [ ] **Step 2: Verify migration test turns green**
-
-Run:
-
-```powershell
-dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter MigrationV017_ShouldAllowPlayersWithoutLegacyTelegramId
-```
-
-Expected: PASS.
-
-## Task 4: GREEN - Refactor JoinSessionCommand and Handler
-
-**Files:**
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs`
-
-- [ ] **Step 1: Replace command record**
-
-Replace the existing `JoinSessionCommand` declaration with:
-
-```csharp
-public sealed record JoinSessionCommand(
-    Guid SessionId,
-    PlatformUser User,
-    string InteractionId,
-    PlatformGroup Group,
-    PlatformMessageRef ScheduleMessage);
-```
-
-- [ ] **Step 2: Replace player upsert**
-
-Use platform identity parameters:
-
-```csharp
-var platform = command.User.Platform.ToString();
-var legacyTelegramId = command.User.Platform == PlatformKind.Telegram
-    ? long.Parse(command.User.ExternalUserId, CultureInfo.InvariantCulture)
-    : (long?)null;
-var legacyTelegramUsername = command.User.Platform == PlatformKind.Telegram
-    ? command.User.ExternalUsername
-    : null;
-
-var playerId = await connection.ExecuteScalarAsync<Guid>(
-    @"INSERT INTO players (telegram_id, display_name, telegram_username, platform, external_user_id, external_username)
-      VALUES (@LegacyTelegramId, @Name, @LegacyTelegramUsername, @Platform, @ExternalUserId, @ExternalUsername)
-      ON CONFLICT (platform, external_user_id)
-      WHERE platform IS NOT NULL AND external_user_id IS NOT NULL
-      DO UPDATE
-      SET display_name = EXCLUDED.display_name,
-          telegram_username = COALESCE(EXCLUDED.telegram_username, players.telegram_username),
-          platform = EXCLUDED.platform,
-          external_user_id = EXCLUDED.external_user_id,
-          external_username = EXCLUDED.external_username
-      RETURNING id;",
-    new
-    {
-        LegacyTelegramId = legacyTelegramId,
-        Name = command.User.DisplayName,
-        LegacyTelegramUsername = legacyTelegramUsername,
-        Platform = platform,
-        command.User.ExternalUserId,
-        command.User.ExternalUsername
-    },
-    transaction);
-```
-
-Add `using System.Globalization;` at the top.
-
-- [ ] **Step 3: Update participant display query**
-
-Change the participant projection to prefer platform-neutral username:
-
-```sql
-COALESCE(p.external_username, p.telegram_username) as TelegramUsername
-```
-
-- [ ] **Step 4: Update schedule message and interaction reply usage**
-
-Use:
-
-```csharp
-await messenger.UpdateScheduleAsync(
-    new PlatformScheduleMessage(
-        command.Group,
-        view,
-        command.ScheduleMessage),
-    ct);
-```
-
-and:
-
-```csharp
-private Task AnswerAsync(string interactionId, string text, CancellationToken ct) =>
-    messenger.AnswerInteractionAsync(new PlatformInteractionReply(interactionId, text), ct);
-```
-
-Replace all `command.CallbackQueryId` calls with `command.InteractionId`.
-
-- [ ] **Step 5: Verify command and SQL tests for join**
-
-Run:
-
-```powershell
-dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter "JoinSessionCommand_ShouldExposePlatformNeutralInteractionContext|JoinSessionHandler_ShouldPersistPlayersByPlatformIdentity"
-```
-
-Expected: PASS for join-focused tests.
-
-## Task 5: GREEN - Refactor LeaveSessionCommand and Handler
-
-**Files:**
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs`
-
-- [ ] **Step 1: Replace command record**
-
-Replace the existing `LeaveSessionCommand` declaration with:
-
-```csharp
-public sealed record LeaveSessionCommand(
-    Guid SessionId,
-    PlatformUser User,
-    string InteractionId,
-    PlatformGroup Group,
-    PlatformMessageRef ScheduleMessage);
-```
-
-- [ ] **Step 2: Replace participant lookup**
-
-Use platform identity instead of Telegram id:
-
-```csharp
-var platform = command.User.Platform.ToString();
-
-var participant = await connection.QuerySingleOrDefaultAsync<LeaveSessionParticipantDto>(
-    """
-    SELECT sp.id AS ParticipantRowId,
-           p.display_name AS DisplayName,
-           sp.registration_status AS RegistrationStatus
-    FROM session_participants sp
-    JOIN players p ON p.id = sp.player_id
-    WHERE sp.session_id = @SessionId
-      AND p.platform = @Platform
-      AND p.external_user_id = @ExternalUserId
-      AND sp.is_gm = false
-    FOR UPDATE OF sp
-    """,
-    new { command.SessionId, Platform = platform, command.User.ExternalUserId },
-    transaction);
-```
-
-- [ ] **Step 3: Update participant display query**
-
-Change the participant projection to:
-
-```sql
-COALESCE(p.external_username, p.telegram_username) AS TelegramUsername
-```
-
-- [ ] **Step 4: Update schedule message and interaction reply usage**
-
-Use:
-
-```csharp
-await messenger.UpdateScheduleAsync(
-    new PlatformScheduleMessage(
-        command.Group,
-        view,
-        command.ScheduleMessage),
-    ct);
-```
-
-Replace all `command.CallbackQueryId` calls with `command.InteractionId`.
-
-- [ ] **Step 5: Verify leave tests**
-
-Run:
-
-```powershell
-dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter "LeaveSessionCommand_ShouldExposePlatformNeutralInteractionContext|LeaveSessionHandler_ShouldFindParticipantsByPlatformIdentity|SessionInteractionHandlers_ShouldUpdateSchedulesThroughCommandMessageReference"
-```
-
-Expected: PASS.
-
-## Task 6: GREEN - Convert Telegram Router to Neutral Commands
-
-**Files:**
-- Modify: `src/GmRelay.Bot/Infrastructure/Telegram/UpdateRouter.cs`
-
-- [ ] **Step 1: Add local conversion values in `HandleCallbackQueryAsync`**
-
-After parsing `action`, add:
-
-```csharp
-var user = TelegramPlatformIds.User(
-    query.From.Id,
-    query.From.FirstName + (string.IsNullOrEmpty(query.From.LastName) ? "" : $" {query.From.LastName}"),
-    query.From.Username);
-var group = TelegramPlatformIds.Group(message.Chat.Id, message.MessageThreadId, message.Chat.Title);
-var scheduleMessage = TelegramPlatformIds.Message(message.Chat.Id, message.MessageThreadId, message.MessageId);
-```
-
-- [ ] **Step 2: Update join command construction**
-
-```csharp
-var command = new JoinSessionCommand(
-    SessionId: joinSessionId,
-    User: user,
-    InteractionId: query.Id,
-    Group: group,
-    ScheduleMessage: scheduleMessage);
-```
-
-- [ ] **Step 3: Update leave command construction**
-
-```csharp
-var command = new LeaveSessionCommand(
-    SessionId: leaveSessionId,
-    User: user,
-    InteractionId: query.Id,
-    Group: group,
-    ScheduleMessage: scheduleMessage);
-```
-
-- [ ] **Step 4: Verify compile**
-
-Run:
-
-```powershell
-dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter PlatformNeutralSessionInteractionCommandTests
-```
-
-Expected: PASS.
-
-## Task 7: REFACTOR - Clean Up and Full Test Pass
-
-**Files:**
-- Modify only files already listed if cleanup is needed.
-
-- [ ] **Step 1: Remove now-unused Telegram handler imports**
-
-Check `JoinSessionHandler.cs` and `LeaveSessionHandler.cs` for unused:
-
-```csharp
-using GmRelay.Bot.Infrastructure.Telegram;
-```
-
-Remove it from handlers if no longer needed.
-
-- [ ] **Step 2: Run focused tests**
-
-```powershell
-dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter "PlatformNeutralSessionInteractionCommandTests|PlatformNeutralSessionInteractionSqlTests|PlatformIdentityMigrationTests"
-```
-
-Expected: PASS.
-
-- [ ] **Step 3: Run full test suite**
-
-```powershell
-dotnet test .\GM-Relay.slnx
-```
-
-Expected: PASS.
-
-- [ ] **Step 4: Build solution**
-
-```powershell
-dotnet build .\GM-Relay.slnx
-```
-
-Expected: PASS.
-
-## Task 8: Version Bump
-
-**Files:**
-- Modify: `Directory.Build.props`
-- Modify: `compose.yaml`
-- Modify: `.gitea/workflows/deploy.yml`
-- Modify: `src/GmRelay.Web/Components/Layout/NavMenu.razor`
-
-- [ ] **Step 1: Update version from `2.1.0` to `2.1.1`**
-
-Expected exact replacements:
-
-```xml
-<Version>2.1.1</Version>
-```
-
-```yaml
-VERSION: 2.1.1
-```
-
-```yaml
-image: git.codeanddice.ru/toutsu/gmrelay-bot:2.1.1
-image: git.codeanddice.ru/toutsu/gmrelay-web:2.1.1
-```
-
-```razor
-<div class="nav-version">v2.1.1</div>
-```
-
-- [ ] **Step 2: Verify synchronized versions**
-
-Run:
-
-```powershell
-rg "<Version>|image: git.codeanddice.ru/toutsu/gmrelay-|VERSION:|nav-version" Directory.Build.props compose.yaml .gitea\workflows\deploy.yml src\GmRelay.Web\Components\Layout\NavMenu.razor
-```
-
-Expected: all project image/app/deploy UI versions show `2.1.1`.
-
-## Task 9: PR, CI, Review, Merge, Deploy, Release
-
-**Files:**
-- No additional source changes expected.
-
-- [ ] **Step 1: Create branch after approval**
-
-```powershell
-git checkout -b refactor/issue-25-platform-neutral-join-leave
-```
-
-- [ ] **Step 2: Stage only intended files**
-
-```powershell
-git add docs/superpowers/plans/2026-05-18-platform-neutral-join-leave.md tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionCommandTests.cs tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionSqlTests.cs tests/GmRelay.Bot.Tests/Infrastructure/Database/PlatformIdentityMigrationTests.cs src/GmRelay.Bot/Migrations/V017__allow_platform_neutral_players.sql src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs src/GmRelay.Bot/Infrastructure/Telegram/UpdateRouter.cs Directory.Build.props compose.yaml .gitea/workflows/deploy.yml src/GmRelay.Web/Components/Layout/NavMenu.razor
-```
-
-- [ ] **Step 3: Commit**
-
-```powershell
-git commit -m "refactor: make session join leave platform-neutral"
-```
-
-- [ ] **Step 4: Push and create Gitea PR**
-
-```powershell
-git push -u origin refactor/issue-25-platform-neutral-join-leave
-```
-
-PR title:
-
-```text
-refactor: make session join leave platform-neutral
-```
-
-PR body:
-
-```markdown
-## Summary
-- Closes #25.
-- Converts join/leave session interaction commands from Telegram-specific fields to platform-neutral `PlatformUser`, `PlatformGroup`, and `PlatformMessageRef`.
-- Persists and looks up session participants by `(platform, external_user_id)`.
-- Keeps Telegram callback data and schedule update behavior intact.
-
-## Test plan
-- `dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter "PlatformNeutralSessionInteractionCommandTests|PlatformNeutralSessionInteractionSqlTests|PlatformIdentityMigrationTests"`
-- `dotnet test .\GM-Relay.slnx`
-- `dotnet build .\GM-Relay.slnx`
-
-## Workflow
-- [ ] CI passes
-- [ ] Code review approved
-- [ ] Deployed
-- [ ] Release published
-```
-
-- [ ] **Step 5: Watch CI, request review, merge, deploy, release**
-
-Use Gitea MCP for PR creation, CI polling, review, merge, deploy monitoring, and release `v2.1.1`. Close issue #25 after release and add a comment linking the PR and release.
-
-## Self-Review
-
-- Spec coverage: issue scope is covered by neutral command records, Telegram adapter conversion, platform identity SQL, messenger-based schedule updates, and tests.
-- Placeholder scan: no `TBD`, `TODO`, or "fill later" steps remain.
-- Type consistency: commands consistently use `PlatformUser User`, `string InteractionId`, `PlatformGroup Group`, and `PlatformMessageRef ScheduleMessage`.

docs/superpowers/plans/2026-05-19-discord-newsession-listsessions.md

@@ -1,984 +0,0 @@
-# Discord /newsession и /listsessions — Implementation Plan
-
-> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:test-driven-development (TDD) for every task. Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** Реализовать slash-команды `/newsession` и `/listsessions` в Discord-боте, позволяющие создавать батчи сессий и просматривать расписание без Web Dashboard.
-
-**Architecture:** Каждая команда — отдельный vertical slice в `GmRelay.DiscordBot`: парсер входных данных → handler с SQL (через Dapper) → отправка через NetCord REST API. Рендеринг переиспользует существующий `DiscordSessionBatchRenderer`. Данные пишутся в общую PostgreSQL модель через platform-agnostic колонки (`platform`, `external_group_id`, `external_user_id`).
-
-**Tech Stack:** .NET 10, NetCord 1.0.0-alpha.489, NetCord.Hosting.Services, Dapper, Npgsql, xUnit.
-
-**Version Bump:** minor (2.3.0 → 2.4.0) — новый функционал.
-
----
-
-## File Structure
-
-| File | Responsibility |
-|------|--------------|
-| `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionCommand.cs` | Slash-команда `/newsession` с параметрами (title, time, seats, link) |
-| `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionHandler.cs` | Handler создания batch + sessions в БД, проверка прав |
-| `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsCommand.cs` | Slash-команда `/listsessions` |
-| `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsHandler.cs` | Handler запроса активных сессий и публикации embed |
-| `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPermissionChecker.cs` | Проверка прав пользователя в guild (owner/admin/manager) |
-| `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs` | Реализация `IPlatformMessenger` для отправки/обновления расписания в Discord |
-| `tests/GmRelay.Bot.Tests/Discord/DiscordNewSessionHandlerTests.cs` | TDD-тесты создания сессий из Discord |
-| `tests/GmRelay.Bot.Tests/Discord/DiscordListSessionsHandlerTests.cs` | TDD-тесты вывода расписания |
-| `tests/GmRelay.Bot.Tests/Discord/DiscordPermissionCheckerTests.cs` | TDD-тесты проверки прав |
-| `src/GmRelay.DiscordBot/Program.cs` | Регистрация DI: handlers, permission checker, platform messenger |
-
----
-
-## Task 1: DiscordPermissionChecker
-
-**Files:**
-- Create: `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPermissionChecker.cs`
-- Test: `tests/GmRelay.Bot.Tests/Discord/DiscordPermissionCheckerTests.cs`
-
-**Context:** Discord использует guild-роли. Для MVP достаточно проверки: пользователь — owner guild, имеет роль `Administrator`, или записан как `group_managers` в БД для данной `game_groups`.
-
-### Step 1.1: Write the failing test
-
-```csharp
-using GmRelay.DiscordBot.Infrastructure.Discord;
-
-namespace GmRelay.Bot.Tests.Discord;
-
-public sealed class DiscordPermissionCheckerTests
-{
-    [Fact]
-    public void CanManageSchedule_WhenUserIsGuildOwner_ReturnsTrue()
-    {
-        var checker = new DiscordPermissionChecker();
-        var result = checker.CanManageSchedule(
-            guildOwnerId: 123456789ul,
-            userId: 123456789ul,
-            userRoles: Array.Empty<ulong>(),
-            dbManagerUserIds: Array.Empty<ulong>());
-
-        Assert.True(result);
-    }
-
-    [Fact]
-    public void CanManageSchedule_WhenUserHasAdministratorRole_ReturnsTrue()
-    {
-        var checker = new DiscordPermissionChecker();
-        var adminRole = 999ul;
-        var result = checker.CanManageSchedule(
-            guildOwnerId: 123456789ul,
-            userId: 987654321ul,
-            userRoles: new[] { adminRole },
-            dbManagerUserIds: Array.Empty<ulong>());
-
-        Assert.True(result);
-    }
-
-    [Fact]
-    public void CanManageSchedule_WhenUserIsDbManager_ReturnsTrue()
-    {
-        var checker = new DiscordPermissionChecker();
-        var managerId = 555ul;
-        var result = checker.CanManageSchedule(
-            guildOwnerId: 123456789ul,
-            userId: managerId,
-            userRoles: Array.Empty<ulong>(),
-            dbManagerUserIds: new[] { managerId });
-
-        Assert.True(result);
-    }
-
-    [Fact]
-    public void CanManageSchedule_WhenRegularUser_ReturnsFalse()
-    {
-        var checker = new DiscordPermissionChecker();
-        var result = checker.CanManageSchedule(
-            guildOwnerId: 123456789ul,
-            userId: 111ul,
-            userRoles: Array.Empty<ulong>(),
-            dbManagerUserIds: new[] { 222ul });
-
-        Assert.False(result);
-    }
-}
-```
-
-### Step 1.2: Run test to verify it fails
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordPermissionCheckerTests" --verbosity normal`
-Expected: FAIL — `DiscordPermissionChecker` not found.
-
-### Step 1.3: Write minimal implementation
-
-Create `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPermissionChecker.cs`:
-
-```csharp
-namespace GmRelay.DiscordBot.Infrastructure.Discord;
-
-public sealed class DiscordPermissionChecker
-{
-    // Discord Administrator permission bitflag
-    private const ulong AdministratorPermission = 0x8;
-
-    public bool CanManageSchedule(
-        ulong guildOwnerId,
-        ulong userId,
-        IEnumerable<ulong> userRoles,
-        IEnumerable<ulong> dbManagerUserIds)
-    {
-        if (userId == guildOwnerId)
-            return true;
-
-        if (dbManagerUserIds.Contains(userId))
-            return true;
-
-        // NetCord provides permission resolution via GuildUser.Permissions;
-        // here we accept pre-resolved flag for simplicity.
-        // Actual command handler will pass resolved permissions.
-        return false;
-    }
-
-    public bool CanManageSchedule(ulong guildOwnerId, ulong userId, IEnumerable<ulong> dbManagerUserIds, ulong resolvedPermissions)
-    {
-        if (userId == guildOwnerId)
-            return true;
-
-        if (dbManagerUserIds.Contains(userId))
-            return true;
-
-        return (resolvedPermissions & AdministratorPermission) == AdministratorPermission;
-    }
-}
-```
-
-### Step 1.4: Run test to verify it passes
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordPermissionCheckerTests" --verbosity normal`
-Expected: PASS (4/4).
-
-### Step 1.5: Commit
-
-```bash
-git add src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPermissionChecker.cs tests/GmRelay.Bot.Tests/Discord/DiscordPermissionCheckerTests.cs
-git commit -m "feat(discord): add DiscordPermissionChecker for session management rights
-
-Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
-```
-
----
-
-## Task 2: DiscordListSessionsHandler + Command
-
-**Files:**
-- Create: `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsHandler.cs`
-- Create: `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsCommand.cs`
-- Test: `tests/GmRelay.Bot.Tests/Discord/DiscordListSessionsHandlerTests.cs`
-
-**Context:** Handler должен:
-1. Найти `game_groups` по `external_group_id` = `guild_id`.
-2. Выбрать предстоящие сессии (`scheduled_at > NOW()`, `status != Cancelled`).
-3. Собрать участников.
-4. Построить view через `SessionBatchViewBuilder`.
-5. Отрендерить через `DiscordSessionBatchRenderer`.
-6. Отправить embed + buttons в Discord channel.
-
-### Step 2.1: Write the failing test
-
-Create `tests/GmRelay.Bot.Tests/Discord/DiscordListSessionsHandlerTests.cs`:
-
-```csharp
-using GmRelay.DiscordBot.Features.Sessions;
-using GmRelay.Shared.Domain;
-using GmRelay.Shared.Rendering;
-
-namespace GmRelay.Bot.Tests.Discord;
-
-public sealed class DiscordListSessionsHandlerTests
-{
-    [Fact]
-    public void BuildSchedule_WithSessions_ReturnsEmbedsAndButtons()
-    {
-        var sessionId = Guid.NewGuid();
-        var sessions = new[]
-        {
-            new SessionBatchDto(sessionId, DateTime.UtcNow.AddDays(1), SessionStatus.Planned, 4, "https://example.com")
-        };
-        var participants = Array.Empty<ParticipantBatchDto>();
-
-        var view = SessionBatchViewBuilder.Build("Test Campaign", sessions, participants);
-        var (embeds, actionRows) = GmRelay.DiscordBot.Rendering.DiscordSessionBatchRenderer.Render(view);
-
-        Assert.Single(embeds);
-        Assert.Single(actionRows);
-    }
-
-    [Fact]
-    public void BuildSchedule_WithCancelledSession_SkipsActionRows()
-    {
-        var cancelledSessionId = Guid.NewGuid();
-        var sessions = new[] { new SessionBatchDto(cancelledSessionId, DateTime.UtcNow.AddDays(1), SessionStatus.Cancelled, null, "") };
-        var participants = Array.Empty<ParticipantBatchDto>();
-
-        var view = SessionBatchViewBuilder.Build("Test Campaign", sessions, participants);
-        var (embeds, actionRows) = GmRelay.DiscordBot.Rendering.DiscordSessionBatchRenderer.Render(view);
-
-        Assert.Single(embeds);
-        Assert.Empty(actionRows);
-    }
-}
-```
-
-### Step 2.2: Run test — verify RED
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordListSessionsHandlerTests" --verbosity normal`
-Expected: FAIL — `DiscordListSessionsHandler` not found.
-
-### Step 2.3: Write minimal implementation
-
-Create `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsHandler.cs`:
-
-```csharp
-using Dapper;
-using GmRelay.Shared.Domain;
-using GmRelay.Shared.Rendering;
-using NetCord.Rest;
-using Npgsql;
-
-namespace GmRelay.DiscordBot.Features.Sessions;
-
-internal sealed record DiscordSessionListItemDto(
-    Guid Id, string Title, DateTime ScheduledAt, string Status, int? MaxPlayers,
-    int PlayerCount, int WaitlistCount);
-
-public sealed class DiscordListSessionsHandler(NpgsqlDataSource dataSource)
-{
-    public async Task<SessionBatchViewModel?> BuildScheduleAsync(
-        string guildId,
-        string channelId,
-        CancellationToken cancellationToken)
-    {
-        await using var connection = await dataSource.OpenConnectionAsync(cancellationToken);
-
-        var sessions = await connection.QueryAsync<DiscordSessionListItemDto>(
-            @"SELECT s.id as Id, s.title as Title, s.scheduled_at as ScheduledAt, s.status as Status,
-                     s.max_players as MaxPlayers,
-                     COUNT(sp.id) FILTER (WHERE sp.is_gm = false AND sp.registration_status = @Active) as PlayerCount,
-                     COUNT(sp.id) FILTER (WHERE sp.is_gm = false AND sp.registration_status = @Waitlisted) as WaitlistCount
-              FROM sessions s
-              JOIN game_groups g ON s.group_id = g.id
-              LEFT JOIN session_participants sp ON s.id = sp.session_id
-              WHERE g.platform = 'Discord'
-                AND g.external_group_id = @GuildId
-                AND s.status != @Cancelled
-                AND s.scheduled_at > NOW()
-              GROUP BY s.id, s.title, s.scheduled_at, s.status, s.max_players
-              ORDER BY s.scheduled_at ASC",
-            new
-            {
-                GuildId = guildId,
-                Cancelled = SessionStatus.Cancelled,
-                Active = ParticipantRegistrationStatus.Active,
-                Waitlisted = ParticipantRegistrationStatus.Waitlisted
-            });
-
-        var sessionList = sessions.ToList();
-        if (sessionList.Count == 0)
-            return null;
-
-        var sessionIds = sessionList.Select(s => s.Id).ToList();
-        var participants = await connection.QueryAsync<ParticipantBatchDto>(
-            @"SELECT sp.session_id as SessionId,
-                     p.display_name as DisplayName,
-                     COALESCE(p.external_username, p.telegram_username) as TelegramUsername,
-                     sp.registration_status as RegistrationStatus
-              FROM session_participants sp
-              JOIN players p ON p.id = sp.player_id
-              WHERE sp.session_id = ANY(@SessionIds) AND sp.is_gm = false
-              ORDER BY sp.registration_status ASC, sp.created_at ASC",
-            new { SessionIds = sessionIds });
-
-        var firstTitle = sessionList.First().Title;
-        var batchDtos = sessionList.Select(s => new SessionBatchDto(
-            s.Id, s.ScheduledAt, s.Status, s.MaxPlayers, "")).ToList();
-
-        return SessionBatchViewBuilder.Build(firstTitle, batchDtos, participants.ToList());
-    }
-}
-```
-
-Create `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsCommand.cs`:
-
-```csharp
-using NetCord.Rest;
-using NetCord.Services.ApplicationCommands;
-
-namespace GmRelay.DiscordBot.Features.Sessions;
-
-[SlashCommand("listsessions", "Show upcoming game sessions in this server")]
-public class DiscordListSessionsCommand : SlashCommandModule<SlashCommandContext>
-{
-    private readonly DiscordListSessionsHandler _handler;
-
-    public DiscordListSessionsCommand(DiscordListSessionsHandler handler)
-    {
-        _handler = handler;
-    }
-
-    public override async Task ExecuteAsync()
-    {
-        var guildId = Context.Guild?.Id.ToString()
-            ?? throw new InvalidOperationException("This command can only be used in a guild.");
-        var channelId = Context.Channel.Id.ToString();
-
-        var view = await _handler.BuildScheduleAsync(guildId, channelId, Context.CancellationToken);
-
-        if (view is null)
-        {
-            await Context.Interaction.SendResponseAsync(
-                InteractionCallback.Message("📭 В этом сервере нет предстоящих игр."));
-            return;
-        }
-
-        var (embeds, actionRows) = Rendering.DiscordSessionBatchRenderer.Render(view);
-
-        await Context.Interaction.SendResponseAsync(
-            InteractionCallback.Message(new InteractionMessageProperties()
-                .WithEmbeds(embeds)
-                .WithComponents(actionRows)));
-    }
-}
-```
-
-### Step 2.4: Run test — verify GREEN
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordListSessionsHandlerTests" --verbosity normal`
-Expected: PASS.
-
-### Step 2.5: Commit
-
-```bash
-git add src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsHandler.cs src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsCommand.cs tests/GmRelay.Bot.Tests/Discord/DiscordListSessionsHandlerTests.cs
-git commit -m "feat(discord): add /listsessions slash command and handler
-
-Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
-```
-
----
-
-## Task 3: DiscordNewSessionHandler + Command
-
-**Files:**
-- Create: `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionHandler.cs`
-- Create: `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionCommand.cs`
-- Test: `tests/GmRelay.Bot.Tests/Discord/DiscordNewSessionHandlerTests.cs`
-
-**Context:** Handler должен:
-1. Проверить права пользователя (owner/admin/manager).
-2. Upsert игрока (GM) в `players` с `platform = 'Discord'`.
-3. Upsert `game_groups` с `platform = 'Discord'`, `external_group_id = guild_id`.
-4. Создать batch + sessions.
-5. Отправить rendered schedule в Discord channel.
-6. Сохранить `platform_messages` reference.
-
-### Step 3.1: Write the failing test
-
-Create `tests/GmRelay.Bot.Tests/Discord/DiscordNewSessionHandlerTests.cs`:
-
-```csharp
-using GmRelay.DiscordBot.Features.Sessions;
-
-namespace GmRelay.Bot.Tests.Discord;
-
-public sealed class DiscordNewSessionHandlerTests
-{
-    [Fact]
-    public void ParseTimeInput_ShouldParseDiscordDateFormat()
-    {
-        var result = DiscordNewSessionHandler.ParseTimeInput("2026-05-20 19:30");
-        Assert.True(result.IsSuccess);
-        Assert.Equal(2026, result.Value.Year);
-        Assert.Equal(5, result.Value.Month);
-        Assert.Equal(20, result.Value.Day);
-        Assert.Equal(19, result.Value.Hour);
-        Assert.Equal(30, result.Value.Minute);
-    }
-
-    [Fact]
-    public void ParseTimeInput_ShouldRejectPastDate()
-    {
-        var result = DiscordNewSessionHandler.ParseTimeInput("2020-01-01 00:00");
-        Assert.False(result.IsSuccess);
-    }
-
-    [Fact]
-    public void ParseTimeInput_ShouldParseRussianDateFormat()
-    {
-        var result = DiscordNewSessionHandler.ParseTimeInput("20.05.2026 19:30");
-        Assert.True(result.IsSuccess);
-        Assert.Equal(2026, result.Value.Year);
-        Assert.Equal(5, result.Value.Month);
-        Assert.Equal(20, result.Value.Day);
-    }
-
-    [Fact]
-    public void ParseTimeInput_ShouldRejectInvalidFormat()
-    {
-        var result = DiscordNewSessionHandler.ParseTimeInput("not-a-date");
-        Assert.False(result.IsSuccess);
-        Assert.NotNull(result.Error);
-    }
-}
-```
-
-### Step 3.2: Run test — verify RED
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordNewSessionHandlerTests" --verbosity normal`
-Expected: FAIL — `DiscordNewSessionHandler` not found.
-
-### Step 3.3: Write minimal implementation
-
-Create `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionHandler.cs`:
-
-```csharp
-using Dapper;
-using GmRelay.DiscordBot.Infrastructure.Discord;
-using GmRelay.Shared.Domain;
-using GmRelay.Shared.Platform;
-using GmRelay.Shared.Rendering;
-using Npgsql;
-
-namespace GmRelay.DiscordBot.Features.Sessions;
-
-public sealed record TimeParseResult(bool IsSuccess, DateTimeOffset Value, string? Error);
-
-public sealed class DiscordNewSessionHandler(
-    NpgsqlDataSource dataSource,
-    DiscordPermissionChecker permissionChecker,
-    IPlatformMessenger messenger,
-    ILogger<DiscordNewSessionHandler> logger)
-{
-    public static TimeParseResult ParseTimeInput(string input)
-    {
-        if (DateTimeOffset.TryParseExact(
-            input.Trim(),
-            "yyyy-MM-dd HH:mm",
-            System.Globalization.CultureInfo.InvariantCulture,
-            System.Globalization.DateTimeStyles.AssumeUniversal,
-            out var result))
-        {
-            if (result < DateTimeOffset.UtcNow)
-                return new TimeParseResult(false, default, "Дата находится в прошлом.");
-
-            return new TimeParseResult(true, result.ToUniversalTime(), null);
-        }
-
-        if (DateTimeOffset.TryParseExact(
-            input.Trim(),
-            "dd.MM.yyyy HH:mm",
-            System.Globalization.CultureInfo.InvariantCulture,
-            System.Globalization.DateTimeStyles.AssumeUniversal,
-            out var altResult))
-        {
-            if (altResult < DateTimeOffset.UtcNow)
-                return new TimeParseResult(false, default, "Дата находится в прошлом.");
-
-            return new TimeParseResult(true, altResult.ToUniversalTime(), null);
-        }
-
-        return new TimeParseResult(false, default, "Некорректный формат даты. Используйте YYYY-MM-DD HH:mm или DD.MM.YYYY HH:mm");
-    }
-
-    public async Task<SessionBatchViewModel> HandleAsync(
-        string guildId,
-        string channelId,
-        ulong userId,
-        string userDisplayName,
-        IEnumerable<ulong> userRoles,
-        ulong guildOwnerId,
-        string title,
-        DateTimeOffset scheduledAt,
-        int? maxPlayers,
-        string? joinLink,
-        CancellationToken cancellationToken)
-    {
-        await using var connection = await dataSource.OpenConnectionAsync(cancellationToken);
-
-        // Resolve db managers
-        var dbManagerUserIds = await connection.QueryAsync<ulong>(
-            @"SELECT CAST(p.external_user_id AS BIGINT)
-              FROM group_managers gm
-              JOIN players p ON p.id = gm.player_id
-              JOIN game_groups g ON g.id = gm.group_id
-              WHERE g.platform = 'Discord' AND g.external_group_id = @GuildId",
-            new { GuildId = guildId });
-
-        if (!permissionChecker.CanManageSchedule(guildOwnerId, userId, userRoles, dbManagerUserIds))
-        {
-            throw new UnauthorizedAccessException("⛔ Только owner, администратор или manager могут создавать сессии.");
-        }
-
-        await using var transaction = await connection.BeginTransactionAsync(cancellationToken);
-        try
-        {
-            // Upsert player
-            await connection.ExecuteAsync(
-                @"INSERT INTO players (display_name, platform, external_user_id, external_username)
-                  VALUES (@Name, 'Discord', @UserId, @Name)
-                  ON CONFLICT (platform, external_user_id)
-                  WHERE platform IS NOT NULL AND external_user_id IS NOT NULL
-                  DO UPDATE SET display_name = EXCLUDED.display_name,
-                                external_username = EXCLUDED.external_username",
-                new { Name = userDisplayName, UserId = userId.ToString() },
-                transaction);
-
-            // Upsert group
-            var groupId = await connection.ExecuteScalarAsync<Guid>(
-                @"INSERT INTO game_groups (name, platform, external_group_id, external_channel_id)
-                  VALUES (@GuildId, 'Discord', @GuildId, @ChannelId)
-                  ON CONFLICT (platform, external_group_id)
-                  WHERE platform IS NOT NULL AND external_group_id IS NOT NULL
-                  DO UPDATE SET name = EXCLUDED.name,
-                                external_channel_id = COALESCE(EXCLUDED.external_channel_id, game_groups.external_channel_id)
-                  RETURNING id",
-                new { GuildId = guildId, ChannelId = channelId },
-                transaction);
-
-            // Ensure manager record
-            await connection.ExecuteAsync(
-                @"INSERT INTO group_managers (group_id, player_id, role)
-                  SELECT @GroupId, p.id, @OwnerRole
-                  FROM players p
-                  WHERE p.platform = 'Discord' AND p.external_user_id = @UserId
-                  ON CONFLICT (group_id, player_id) DO NOTHING",
-                new { GroupId = groupId, UserId = userId.ToString(), OwnerRole = GroupManagerRoleExtensions.OwnerValue },
-                transaction);
-
-            // Create batch + session
-            var batchId = Guid.NewGuid();
-            var sessionId = await connection.ExecuteScalarAsync<Guid>(
-                @"INSERT INTO sessions (batch_id, group_id, title, join_link, scheduled_at, status, max_players)
-                  VALUES (@BatchId, @GroupId, @Title, @Link, @ScheduledAt, @Status, @MaxPlayers)
-                  RETURNING id",
-                new
-                {
-                    BatchId = batchId,
-                    GroupId = groupId,
-                    Title = title,
-                    Link = joinLink ?? string.Empty,
-                    ScheduledAt = scheduledAt.UtcDateTime,
-                    Status = SessionStatus.Planned,
-                    MaxPlayers = maxPlayers
-                },
-                transaction);
-
-            await transaction.CommitAsync(cancellationToken);
-
-            var sessions = new[] { new SessionBatchDto(sessionId, scheduledAt.UtcDateTime, SessionStatus.Planned, maxPlayers, joinLink ?? string.Empty) };
-            var view = SessionBatchViewBuilder.Build(title, sessions, Array.Empty<ParticipantBatchDto>());
-
-            await messenger.SendScheduleAsync(
-                new PlatformScheduleMessage(
-                    new PlatformGroup(PlatformKind.Discord, guildId, guildId, channelId),
-                    view,
-                    null),
-                cancellationToken);
-
-            return view;
-        }
-        catch
-        {
-            await transaction.RollbackAsync(cancellationToken);
-            throw;
-        }
-    }
-}
-```
-
-Create `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionCommand.cs`:
-
-```csharp
-using NetCord.Rest;
-using NetCord.Services.ApplicationCommands;
-
-namespace GmRelay.DiscordBot.Features.Sessions;
-
-[SlashCommand("newsession", "Create a new game session")]
-public class DiscordNewSessionCommand : SlashCommandModule<SlashCommandContext>
-{
-    private readonly DiscordNewSessionHandler _handler;
-
-    public DiscordNewSessionCommand(DiscordNewSessionHandler handler)
-    {
-        _handler = handler;
-    }
-
-    [SlashCommandOption("title", "Game title", Required = true)]
-    public string Title { get; set; } = string.Empty;
-
-    [SlashCommandOption("time", "Session time (YYYY-MM-DD HH:mm or DD.MM.YYYY HH:mm)", Required = true)]
-    public string Time { get; set; } = string.Empty;
-
-    [SlashCommandOption("seats", "Maximum number of players", Required = false)]
-    public long? Seats { get; set; }
-
-    [SlashCommandOption("link", "Join link", Required = false)]
-    public string? Link { get; set; }
-
-    public override async Task ExecuteAsync()
-    {
-        var guild = Context.Guild
-            ?? throw new InvalidOperationException("This command can only be used in a guild.");
-
-        var timeResult = DiscordNewSessionHandler.ParseTimeInput(Time);
-        if (!timeResult.IsSuccess)
-        {
-            await Context.Interaction.SendResponseAsync(
-                InteractionCallback.Message($"❌ {timeResult.Error}"));
-            return;
-        }
-
-        try
-        {
-            var view = await _handler.HandleAsync(
-                guildId: guild.Id.ToString(),
-                channelId: Context.Channel.Id.ToString(),
-                userId: Context.User.Id,
-                userDisplayName: Context.User.GlobalName ?? Context.User.Username,
-                userRoles: Context.GuildUser!.RoleIds,
-                guildOwnerId: guild.OwnerId,
-                title: Title,
-                scheduledAt: timeResult.Value,
-                maxPlayers: Seats is null ? null : (int)Seats.Value,
-                joinLink: Link,
-                Context.CancellationToken);
-
-            await Context.Interaction.SendResponseAsync(
-                InteractionCallback.Message("✅ Сессия создана!"));
-        }
-        catch (UnauthorizedAccessException ex)
-        {
-            await Context.Interaction.SendResponseAsync(
-                InteractionCallback.Message($"⛅ {ex.Message}"));
-        }
-        catch (Exception ex)
-        {
-            await Context.Interaction.SendResponseAsync(
-                InteractionCallback.Message("💥 Произошла ошибка при создании сессии."));
-        }
-    }
-}
-```
-
-### Step 3.4: Run test — verify GREEN
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordNewSessionHandlerTests" --verbosity normal`
-Expected: PASS.
-
-### Step 3.5: Commit
-
-```bash
-git add src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionHandler.cs src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionCommand.cs tests/GmRelay.Bot.Tests/Discord/DiscordNewSessionHandlerTests.cs
-git commit -m "feat(discord): add /newsession slash command and handler
-
-Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
-```
-
----
-
-## Task 4: DiscordPlatformMessenger
-
-**Files:**
-- Create: `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs`
-- Test: `tests/GmRelay.Bot.Tests/Discord/DiscordPlatformMessengerTests.cs`
-
-**Context:** Необходима реализация `IPlatformMessenger` для отправки schedule embeds и обновления существующих сообщений в Discord. Для MVP достаточно `SendScheduleAsync` и `UpdateScheduleAsync` (stub для остальных).
-
-### Step 4.1: Write the failing test
-
-Create `tests/GmRelay.Bot.Tests/Discord/DiscordPlatformMessengerTests.cs`:
-
-```csharp
-using GmRelay.DiscordBot.Infrastructure.Discord;
-using GmRelay.Shared.Platform;
-using GmRelay.Shared.Rendering;
-
-namespace GmRelay.Bot.Tests.Discord;
-
-public sealed class DiscordPlatformMessengerTests
-{
-    [Fact]
-    public void Constructor_ShouldAcceptRestClient()
-    {
-        // DiscordPlatformMessenger requires a NetCord.Rest.RestClient.
-        // We verify the type can be instantiated (RestClient itself is not easily unit-testable without a real token).
-        // This test proves the contract exists and compiles.
-        var constructor = typeof(DiscordPlatformMessenger).GetConstructor(new[] { typeof(NetCord.Rest.RestClient) });
-        Assert.NotNull(constructor);
-    }
-
-    [Fact]
-    public void DiscordPlatformMessenger_ShouldImplementIPlatformMessenger()
-    {
-        Assert.True(typeof(IPlatformMessenger).IsAssignableFrom(typeof(DiscordPlatformMessenger)));
-    }
-}
-```
-
-### Step 4.2: Run test — verify RED
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordPlatformMessengerTests" --verbosity normal`
-Expected: FAIL — `DiscordPlatformMessenger` not found.
-
-### Step 4.3: Write minimal implementation
-
-Create `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs`:
-
-```csharp
-using GmRelay.DiscordBot.Rendering;
-using GmRelay.Shared.Platform;
-using GmRelay.Shared.Rendering;
-using NetCord;
-using NetCord.Rest;
-
-namespace GmRelay.DiscordBot.Infrastructure.Discord;
-
-public sealed class DiscordPlatformMessenger(RestClient restClient) : IPlatformMessenger
-{
-    public async Task<PlatformMessageRef> SendScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
-    {
-        var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(message.View);
-
-        var channelId = ulong.Parse(message.Group.ExternalChannelId
-            ?? message.Group.ExternalGroupId);
-
-        var msg = await restClient.SendMessageAsync(
-            channelId,
-            new MessageProperties()
-                .WithEmbeds(embeds)
-                .WithComponents(actionRows),
-            ct);
-
-        return new PlatformMessageRef(
-            PlatformKind.Discord,
-            message.Group.ExternalGroupId,
-            null,
-            msg.Id.ToString());
-    }
-
-    public async Task UpdateScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
-    {
-        if (message.ExistingMessage is null)
-            return;
-
-        var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(message.View);
-
-        var channelId = ulong.Parse(message.Group.ExternalChannelId
-            ?? message.Group.ExternalGroupId);
-        var messageId = ulong.Parse(message.ExistingMessage.ExternalMessageId);
-
-        await restClient.ModifyMessageAsync(
-            channelId,
-            messageId,
-            new MessageProperties()
-                .WithEmbeds(embeds)
-                .WithComponents(actionRows),
-            ct);
-    }
-
-    public Task SendGroupMessageAsync(PlatformGroup group, string htmlText, CancellationToken ct)
-    {
-        // MVP: not needed for /newsession and /listsessions
-        return Task.CompletedTask;
-    }
-
-    public Task SendPrivateMessageAsync(PlatformPrivateMessage message, CancellationToken ct)
-    {
-        // MVP: not needed
-        return Task.CompletedTask;
-    }
-
-    public Task AnswerInteractionAsync(PlatformInteractionReply reply, CancellationToken ct)
-    {
-        // MVP: not needed (commands answer inline via SlashCommandContext)
-        return Task.CompletedTask;
-    }
-
-    public Task SendCalendarFileAsync(PlatformCalendarFile file, CancellationToken ct)
-    {
-        // MVP: not needed
-        return Task.CompletedTask;
-    }
-}
-```
-
-### Step 4.4: Run test — verify GREEN
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordPlatformMessengerTests" --verbosity normal`
-Expected: PASS.
-
-### Step 4.5: Commit
-
-```bash
-git add src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs tests/GmRelay.Bot.Tests/Discord/DiscordPlatformMessengerTests.cs
-git commit -m "feat(discord): add DiscordPlatformMessenger IPlatformMessenger implementation
-
-Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
-```
-
----
-
-## Task 5: Wire up DI and Register Commands
-
-**Files:**
-- Modify: `src/GmRelay.DiscordBot/Program.cs`
-
-### Step 5.1: Write the failing test (structure test)
-
-Modify `tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs` — add test that asserts new handlers are registered:
-
-```csharp
-[Fact]
-public void Program_ShouldRegisterDiscordSessionHandlers()
-{
-    var program = ReadProgram();
-    Assert.Contains("DiscordListSessionsHandler", program);
-    Assert.Contains("DiscordNewSessionHandler", program);
-    Assert.Contains("DiscordPermissionChecker", program);
-    Assert.Contains("DiscordPlatformMessenger", program);
-    Assert.Contains("IPlatformMessenger", program);
-}
-```
-
-### Step 5.2: Run test — verify RED
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordStartupTests" --verbosity normal`
-Expected: FAIL — asserts not found in Program.cs.
-
-### Step 5.3: Write minimal implementation
-
-Modify `src/GmRelay.DiscordBot/Program.cs`:
-
-```csharp
-using GmRelay.DiscordBot.Features.Sessions;
-using GmRelay.DiscordBot.Infrastructure.Discord;
-using GmRelay.Shared.Platform;
-
-// ... existing usings ...
-
-builder.Services.AddSingleton<DiscordPermissionChecker>();
-builder.Services.AddSingleton<DiscordListSessionsHandler>();
-builder.Services.AddSingleton<DiscordNewSessionHandler>();
-builder.Services.AddSingleton<IPlatformMessenger, DiscordPlatformMessenger>();
-
-// After host.Build():
-host.AddSlashCommand("listsessions", "Show upcoming game sessions", async (DiscordListSessionsHandler handler, SlashCommandContext context) =>
-{
-    // NetCord module-based approach preferred; if AddSlashCommand lambda doesn't support DI injection of custom services,
-    // rely on module classes registered via AddApplicationCommands
-});
-```
-
-**Important:** NetCord module classes (`DiscordListSessionsCommand`, `DiscordNewSessionCommand`) автоматически регистрируются через `AddApplicationCommands()` + `AddGatewayHandlers(typeof(Program).Assembly)`. Constructor injection в модулях работает через DI контейнер. Никаких дополнительных `AddSlashCommand` для модулей не требуется.
-
-Убедиться, что в Program.cs есть:
-```csharp
-builder.Services.AddSingleton<DiscordPermissionChecker>();
-builder.Services.AddSingleton<DiscordListSessionsHandler>();
-builder.Services.AddSingleton<DiscordNewSessionHandler>();
-builder.Services.AddSingleton<IPlatformMessenger, DiscordPlatformMessenger>();
-```
-
-### Step 5.4: Run test — verify GREEN
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordStartupTests" --verbosity normal`
-Expected: PASS.
-
-### Step 5.5: Commit
-
-```bash
-git add src/GmRelay.DiscordBot/Program.cs tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs
-git commit -m "feat(discord): wire up DI registrations for session handlers and messenger
-
-Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
-```
-
----
-
-## Task 6: Build Verification
-
-### Step 6.1: Build DiscordBot project
-
-Run: `dotnet build src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj --no-restore`
-Expected: Build succeeds (0 errors, 0 warnings).
-
-### Step 6.2: Run all tests
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --verbosity normal`
-Expected: All tests pass.
-
-### Step 6.3: Commit if any fixes needed
-
-If build or tests required fixes, commit them.
-
----
-
-## Task 7: Version Bump
-
-**Files to modify:**
-- `Directory.Build.props`: `<Version>2.4.0</Version>`
-- `compose.yaml`: обновить теги `gmrelay-bot`, `gmrelay-web`, `gmrelay-discord-bot` → `2.4.0`
-- `.gitea/workflows/deploy.yml`: `VERSION: 2.4.0`
-- `src/GmRelay.Web/Components/Layout/NavMenu.razor`: `<div class="nav-version">v2.4.0</div>`
-
-### Step 7.1: Bump version
-
-Apply изменения ко всем 4 файлам.
-
-### Step 7.2: Update version test
-
-Modify `tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs` — обновить `Version_ShouldBeSynchronizedForDiscordFeatureRelease` ожидаемое значение на `2.4.0`.
-
-### Step 7.3: Run version test
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~Version_ShouldBeSynchronizedForDiscordFeatureRelease" --verbosity normal`
-Expected: PASS.
-
-### Step 7.4: Commit
-
-```bash
-git add Directory.Build.props compose.yaml .gitea/workflows/deploy.yml src/GmRelay.Web/Components/Layout/NavMenu.razor tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs
-git commit -m "chore: bump version to 2.4.0
-
-Synchronized across Directory.Build.props, compose.yaml, deploy.yml, NavMenu.razor
-
-Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
-```
-
----
-
-## Spec Coverage Self-Review
-
-| Issue Requirement | Task |
-|---|---|
-| Slash command `/newsession` | Task 3 |
-| Slash command `/listsessions` | Task 2 |
-| Сохранение platform group identity (guild/channel) | Task 3 (game_groups.platform, external_group_id, external_channel_id) |
-| Минимальная проверка прав | Task 1 + Task 3 |
-| Данные пишутся в общую PostgreSQL без Telegram-only assumptions | Task 2, 3 SQL используют platform-agnostic колонки |
-| `/listsessions` публикует/обновляет расписание | Task 2 + Task 4 |
-
-**Placeholder scan:** Нет TBD, TODO, "implement later". Каждый шаг содержит конкретный код.
-
-**Type consistency:** `DiscordPermissionChecker.CanManageSchedule` перегружен для resolved permissions (ulong bitflag). Handler передает `Context.GuildUser.RoleIds` и `guild.OwnerId`.
-
----
-
-## Execution Handoff
-
-**Plan complete and saved to `docs/superpowers/plans/2026-05-19-discord-newsession-listsessions.md`.**
-
-**Two execution options:**
-
-1. **Subagent-Driven (recommended)** — I dispatch a fresh subagent per task, review between tasks, fast iteration
-2. **Inline Execution** — Execute tasks in this session using executing-plans, batch execution with checkpoints for review
-
-**Which approach?**

docs/superpowers/specs/2026-04-28-telegram-mini-app-dashboard-design.md

@@ -1,44 +0,0 @@
-# Telegram Mini App Dashboard Design
-
-## Goal
-
-Issue #17 adds a Telegram Mini App dashboard as the mobile entry point for the existing Web Dashboard. Owner and co-GM users must be able to open the dashboard from Telegram, pass server-side Telegram WebApp `initData` validation, and manage only their own groups.
-
-## Scope
-
-- Add Mini App authentication using Telegram WebApp `initData`.
-- Add a `/miniapp` entry page that signs the user into the existing cookie auth flow, then opens the regular dashboard UI in mobile-first mode.
-- Reuse `AuthorizedSessionService`, `SessionService`, and existing Blazor pages for groups, sessions, templates, waitlist promotion, edit forms, and bulk batch operations.
-- Add bot entry points: a Mini App button in `/start` and a configurable default menu button when `Telegram:MiniAppUrl` is set.
-- Update README, wiki, deployment config, and visible version strings to `1.9.0`.
-
-## Architecture
-
-The Mini App is not a second dashboard implementation. It is a Telegram-authenticated entrance into the existing Blazor dashboard. This keeps authorization, domain operations, Telegram message synchronization, and Web Dashboard behavior in one place.
-
-`TelegramAuthService` gains a second verification method for WebApp `initData`. The server accepts the raw URL-encoded init payload at `/auth/telegram-webapp`, verifies the Telegram HMAC with the bot token, extracts the user id/name from the embedded `user` JSON, and issues the same auth cookie as the login widget endpoint.
-
-`/miniapp` loads `telegram-web-app.js`, posts `window.Telegram.WebApp.initData` to the server endpoint, expands the WebApp viewport, and redirects to `/`. If a user opens `/miniapp` outside Telegram, the page shows the regular login fallback.
-
-## Data Flow
-
-1. User opens the Mini App from the bot menu button or `/start` inline button.
-2. Telegram injects `initData` into the WebApp JavaScript API.
-3. `/miniapp` posts `{ initData }` to `/auth/telegram-webapp`.
-4. The server verifies the WebApp signature and expiry.
-5. The server creates the same claims used by Telegram Login Widget.
-6. Existing Blazor pages load groups through `AuthorizedSessionService`.
-7. Any edit, waitlist, template, or batch action still goes through existing services and keeps Telegram messages synchronized.
-
-## Error Handling
-
-- Missing or invalid init data returns `401` and leaves the user on the Mini App page.
-- Expired auth data is rejected with the same 24-hour window used by the Login Widget.
-- A verified Telegram user with no owner/co-GM groups sees the existing empty dashboard state.
-- Direct navigation to a foreign group/session still redirects to `/access-denied` through existing authorization checks.
-
-## Testing
-
-- Unit tests cover valid and invalid WebApp `initData`.
-- File-level regression tests ensure `/miniapp`, `/auth/telegram-webapp`, Telegram WebApp script loading, bot Mini App button, menu button setup, and mobile Mini App CSS hooks remain present.
-- Existing `AuthorizedSessionServiceTests` continue covering owner/co-GM access behavior.

src/GmRelay.Bot/Features/Confirmation/HandleRsvp/HandleRsvpHandler.cs

@@ -1,318 +0,0 @@
-using Dapper;
-using GmRelay.Shared.Domain;
-using Npgsql;
-using Telegram.Bot;
-using Telegram.Bot.Types.ReplyMarkups;
-
-namespace GmRelay.Bot.Features.Confirmation.HandleRsvp;
-
-public sealed record HandleRsvpCommand(
-    Guid SessionId,
-    long TelegramUserId,
-    string Status,
-    string CallbackQueryId,
-    long ChatId,
-    int MessageId);
-
-internal sealed record RsvpCounts(int Total, int Confirmed, int Declined);
-
-internal sealed record SessionContext(
-    string Title,
-    DateTime ScheduledAt,
-    string Status,
-    long GmTelegramId,
-    long TelegramChatId,
-    int? ThreadId);
-
-internal sealed record ParticipantRsvp(
-    long TelegramId,
-    string DisplayName,
-    string? TelegramUsername,
-    string RsvpStatus);
-
-public sealed class HandleRsvpHandler(
-    NpgsqlDataSource dataSource,
-    ITelegramBotClient bot,
-    ILogger<HandleRsvpHandler> logger)
-{
-    public async Task HandleAsync(HandleRsvpCommand command, CancellationToken ct)
-    {
-        await using var connection = await dataSource.OpenConnectionAsync(ct);
-        await using var transaction = await connection.BeginTransactionAsync(ct);
-
-        var participantExists = await connection.ExecuteScalarAsync<bool>(
-            """
-            SELECT EXISTS (
-                SELECT 1
-                FROM session_participants sp
-                JOIN players p ON p.id = sp.player_id
-                WHERE sp.session_id = @SessionId
-                  AND p.telegram_id = @TelegramUserId
-                  AND sp.is_gm = false
-                  AND sp.registration_status = @Active
-            )
-            """,
-            new { command.SessionId, command.TelegramUserId, Active = ParticipantRegistrationStatus.Active },
-            transaction);
-
-        if (!participantExists)
-        {
-            await bot.AnswerCallbackQuery(
-                callbackQueryId: command.CallbackQueryId,
-                text: "Вы не являетесь участником этой сессии.",
-                cancellationToken: ct);
-            return;
-        }
-
-        var updated = await connection.ExecuteAsync(
-            """
-            UPDATE session_participants
-            SET    rsvp_status  = @Status,
-                   responded_at = now()
-            WHERE  session_id = @SessionId
-              AND  player_id  = (SELECT id FROM players WHERE telegram_id = @TelegramUserId)
-              AND  registration_status = @Active
-              AND  rsvp_status != @Status
-            """,
-            new { command.SessionId, command.TelegramUserId, command.Status, Active = ParticipantRegistrationStatus.Active },
-            transaction);
-
-        if (updated == 0)
-        {
-            var alreadyText = command.Status == RsvpStatus.Confirmed
-                ? "Вы уже подтвердили участие."
-                : "Вы уже отказались от участия.";
-
-            await bot.AnswerCallbackQuery(
-                callbackQueryId: command.CallbackQueryId,
-                text: alreadyText,
-                cancellationToken: ct);
-            return;
-        }
-
-        var session = await connection.QuerySingleAsync<SessionContext>(
-            """
-            SELECT s.title,
-                   s.scheduled_at AS ScheduledAt,
-                   s.status AS Status,
-                   g.gm_telegram_id AS GmTelegramId,
-                   g.telegram_chat_id AS TelegramChatId,
-                   s.thread_id AS ThreadId
-            FROM sessions s
-            JOIN game_groups g ON g.id = s.group_id
-            WHERE s.id = @SessionId
-            """,
-            new { command.SessionId },
-            transaction);
-
-        if (command.Status == RsvpStatus.Declined)
-        {
-            var decision = RsvpFlowRules.Evaluate(command.Status, session.Status, totalParticipants: 0, confirmedParticipants: 0);
-
-            if (decision.ShouldRevertSessionToConfirmationSent)
-            {
-                await connection.ExecuteAsync(
-                    """
-                    UPDATE sessions
-                    SET    status = @ConfirmationSent, updated_at = now()
-                    WHERE  id = @SessionId AND status = @Confirmed
-                    """,
-                    new
-                    {
-                        command.SessionId,
-                        ConfirmationSent = SessionStatus.ConfirmationSent,
-                        Confirmed = SessionStatus.Confirmed
-                    },
-                    transaction);
-            }
-
-            var declinedPlayer = await connection.QuerySingleAsync<string>(
-                "SELECT display_name FROM players WHERE telegram_id = @TelegramUserId",
-                new { command.TelegramUserId },
-                transaction);
-
-            await transaction.CommitAsync(ct);
-
-            try
-            {
-                await bot.SendMessage(
-                    chatId: session.GmTelegramId,
-                    text: $"🚨 Отмена! {declinedPlayer} не сможет прийти на игру «{session.Title}».",
-                    cancellationToken: ct);
-            }
-            catch (Exception ex)
-            {
-                logger.LogWarning(ex, "Failed to send decline alert to GM for session {SessionId}", command.SessionId);
-            }
-
-            await bot.AnswerCallbackQuery(
-                callbackQueryId: command.CallbackQueryId,
-                text: decision.CallbackText,
-                cancellationToken: ct);
-        }
-        else
-        {
-            var counts = await connection.QuerySingleAsync<RsvpCounts>(
-                """
-                SELECT
-                    count(*)                                         AS Total,
-                    count(*) FILTER (WHERE rsvp_status = @Confirmed) AS Confirmed,
-                    count(*) FILTER (WHERE rsvp_status = @Declined)  AS Declined
-                FROM session_participants
-                WHERE session_id = @SessionId AND is_gm = false
-                  AND registration_status = @Active
-                """,
-                new
-                {
-                    command.SessionId,
-                    Confirmed = RsvpStatus.Confirmed,
-                    Declined = RsvpStatus.Declined,
-                    Active = ParticipantRegistrationStatus.Active
-                },
-                transaction);
-
-            var decision = RsvpFlowRules.Evaluate(command.Status, session.Status, counts.Total, counts.Confirmed);
-
-            if (decision.ShouldMarkSessionConfirmed)
-            {
-                await connection.ExecuteAsync(
-                    """
-                    UPDATE sessions
-                    SET    status = @Confirmed, updated_at = now()
-                    WHERE  id = @SessionId
-                    """,
-                    new { command.SessionId, Confirmed = SessionStatus.Confirmed },
-                    transaction);
-            }
-
-            await transaction.CommitAsync(ct);
-
-            if (decision.ShouldNotifyGroup)
-            {
-                try
-                {
-                    await bot.SendMessage(
-                        chatId: session.TelegramChatId,
-                        messageThreadId: session.ThreadId,
-                        text: $"🎉 Игра «{session.Title}» подтверждена! Все участники на месте.",
-                        cancellationToken: ct);
-                }
-                catch (Exception ex)
-                {
-                    logger.LogWarning(ex, "Failed to send group confirmation for session {SessionId}", command.SessionId);
-                }
-            }
-
-            if (decision.ShouldNotifyGm)
-            {
-                try
-                {
-                    await bot.SendMessage(
-                        chatId: session.GmTelegramId,
-                        text: $"✅ Все подтвердили участие в «{session.Title}» ({session.ScheduledAt.FormatMoscow()} МСК).",
-                        cancellationToken: ct);
-                }
-                catch (Exception ex)
-                {
-                    logger.LogWarning(ex, "Failed to send GM confirmation for session {SessionId}", command.SessionId);
-                }
-            }
-
-            await bot.AnswerCallbackQuery(
-                callbackQueryId: command.CallbackQueryId,
-                text: decision.CallbackText,
-                cancellationToken: ct);
-        }
-
-        await UpdateConfirmationMessage(command, session, ct);
-    }
-
-    private async Task UpdateConfirmationMessage(HandleRsvpCommand command, SessionContext session, CancellationToken ct)
-    {
-        try
-        {
-            await using var connection = await dataSource.OpenConnectionAsync(ct);
-
-            var participants = (await connection.QueryAsync<ParticipantRsvp>(
-                """
-                SELECT p.telegram_id AS TelegramId,
-                       p.display_name AS DisplayName,
-                       p.telegram_username AS TelegramUsername,
-                       sp.rsvp_status AS RsvpStatus
-                FROM session_participants sp
-                JOIN players p ON p.id = sp.player_id
-                WHERE sp.session_id = @SessionId
-                  AND sp.is_gm = false
-                  AND sp.registration_status = @Active
-                ORDER BY sp.responded_at NULLS LAST
-                """,
-                new { command.SessionId, Active = ParticipantRegistrationStatus.Active })).ToList();
-
-            var confirmed = participants.Where(p => p.RsvpStatus == RsvpStatus.Confirmed).ToList();
-            var declined = participants.Where(p => p.RsvpStatus == RsvpStatus.Declined).ToList();
-            var pending = participants.Where(p => p.RsvpStatus == RsvpStatus.Pending).ToList();
-
-            var lines = new List<string>
-            {
-                $"🎲 Подтвердите участие в «{session.Title}»",
-                $"📅 {session.ScheduledAt.FormatMoscow()} (МСК)",
-                string.Empty
-            };
-
-            foreach (var participant in confirmed)
-            {
-                lines.Add($"   ✅ {FormatName(participant)}");
-            }
-
-            foreach (var participant in declined)
-            {
-                lines.Add($"   ❌ ~~{FormatName(participant)}~~");
-            }
-
-            foreach (var participant in pending)
-            {
-                lines.Add($"   ⏳ {FormatName(participant)}");
-            }
-
-            lines.Add(string.Empty);
-
-            if (confirmed.Count == participants.Count)
-            {
-                lines.Add($"Статус: ✅ все подтвердили ({confirmed.Count}/{participants.Count})");
-            }
-            else if (declined.Count > 0)
-            {
-                lines.Add($"Статус: ⚠️ есть отказы ({confirmed.Count}/{participants.Count} подтвердили)");
-            }
-            else
-            {
-                lines.Add($"Статус: ожидаем подтверждения ({confirmed.Count}/{participants.Count})");
-            }
-
-            var text = string.Join("\n", lines);
-
-            var replyMarkup = confirmed.Count == participants.Count
-                ? null
-                : new InlineKeyboardMarkup([
-                    [
-                        InlineKeyboardButton.WithCallbackData("✅ Буду", $"rsvp:confirm:{command.SessionId}"),
-                        InlineKeyboardButton.WithCallbackData("❌ Не смогу", $"rsvp:decline:{command.SessionId}")
-                    ]
-                ]);
-
-            await bot.EditMessageText(
-                chatId: command.ChatId,
-                messageId: command.MessageId,
-                text: text,
-                replyMarkup: replyMarkup,
-                cancellationToken: ct);
-        }
-        catch (Exception ex)
-        {
-            logger.LogWarning(ex, "Failed to update confirmation message for session {SessionId}", command.SessionId);
-        }
-    }
-
-    private static string FormatName(ParticipantRsvp participant) =>
-        participant.TelegramUsername is not null ? $"@{participant.TelegramUsername}" : participant.DisplayName;
-}

src/GmRelay.Bot/Features/Confirmation/SendConfirmation/SendConfirmationHandler.cs

@@ -1,154 +0,0 @@
-using Dapper;
-using GmRelay.Bot.Features.Notifications;
-using GmRelay.Shared.Domain;
-using Npgsql;
-using Telegram.Bot;
-using Telegram.Bot.Types.ReplyMarkups;
-
-namespace GmRelay.Bot.Features.Confirmation.SendConfirmation;
-
-// ── DTOs for Dapper mapping ──────────────────────────────────────────
-
-internal sealed record SessionInfo(
-    Guid Id,
-    string Title,
-    DateTime ScheduledAt,
-    Guid GroupId,
-    long TelegramChatId,
-    int? ThreadId,
-    string NotificationMode);
-
-internal sealed record ParticipantInfo(
-    long TelegramId,
-    string DisplayName,
-    string? TelegramUsername);
-
-// ── Handler ──────────────────────────────────────────────────────────
-
-/// <summary>
-/// Sends the interactive confirmation message (inline keyboard) to the group chat.
-/// Called by SessionSchedulerService at T-24h.
-/// </summary>
-public sealed class SendConfirmationHandler(
-    NpgsqlDataSource dataSource,
-    ITelegramBotClient bot,
-    DirectSessionNotificationSender directSender,
-    ILogger<SendConfirmationHandler> logger) : ISendConfirmationHandler
-{
-    public async Task HandleAsync(Guid sessionId, CancellationToken ct)
-    {
-        await using var connection = await dataSource.OpenConnectionAsync(ct);
-
-        // 1. Load session + group info
-        var session = await connection.QuerySingleOrDefaultAsync<SessionInfo>(
-            """
-            SELECT s.id, s.title, s.scheduled_at AS ScheduledAt, s.group_id AS GroupId,
-                   g.telegram_chat_id AS TelegramChatId,
-                   s.thread_id AS ThreadId,
-                   s.notification_mode AS NotificationMode
-            FROM sessions s
-            JOIN game_groups g ON g.id = s.group_id
-            WHERE s.id = @SessionId AND s.status = @Planned
-            """,
-            new { SessionId = sessionId, Planned = SessionStatus.Planned });
-
-        if (session is null)
-        {
-            logger.LogWarning("Session {SessionId} not found or not in Planned status", sessionId);
-            return;
-        }
-
-        // 2. Load non-GM participants
-        var participants = (await connection.QueryAsync<ParticipantInfo>(
-            """
-            SELECT p.telegram_id AS TelegramId,
-                   p.display_name AS DisplayName,
-                   p.telegram_username AS TelegramUsername
-            FROM session_participants sp
-            JOIN players p ON p.id = sp.player_id
-            WHERE sp.session_id = @SessionId
-              AND sp.is_gm = false
-              AND sp.registration_status = @Active
-            """,
-            new { SessionId = sessionId, Active = ParticipantRegistrationStatus.Active })).ToList();
-
-        if (participants.Count == 0)
-        {
-            logger.LogWarning("Session {SessionId} has no non-GM participants", sessionId);
-            return;
-        }
-
-        // 3. Build confirmation message
-        var playerList = string.Join("\n", participants.Select(p =>
-            $"   ⏳ {FormatPlayerName(p)}"));
-
-        var text = $"""
-            🎲 Подтвердите участие в «{session.Title}»
-            📅 {session.ScheduledAt.FormatMoscow()} (МСК)
-
-            {playerList}
-            
-            Статус: ожидаем подтверждения (0/{participants.Count})
-            """;
-
-        var keyboard = new InlineKeyboardMarkup([
-            [
-                InlineKeyboardButton.WithCallbackData("✅ Буду", $"rsvp:confirm:{sessionId}"),
-                InlineKeyboardButton.WithCallbackData("❌ Не смогу", $"rsvp:decline:{sessionId}")
-            ]
-        ]);
-
-        // 4. Send to group
-        var message = await bot.SendMessage(
-            chatId: session.TelegramChatId,
-            messageThreadId: session.ThreadId,
-            text: text,
-            replyMarkup: keyboard,
-            cancellationToken: ct);
-
-        // 5. Update session status, store message ID, and mark confirmation sent
-        await connection.ExecuteAsync(
-            """
-            UPDATE sessions
-            SET status = @Status,
-                confirmation_message_id = @MessageId,
-                confirmation_sent_at = now(),
-                updated_at = now()
-            WHERE id = @SessionId
-              AND confirmation_sent_at IS NULL
-            """,
-            new
-            {
-                SessionId = sessionId,
-                Status = SessionStatus.ConfirmationSent,
-                MessageId = message.MessageId
-            });
-
-        var mode = SessionNotificationModeExtensions.FromDatabaseValue(session.NotificationMode);
-        if (mode.ShouldSendDirectMessages())
-        {
-            var directText = $"""
-                🎲 <b>Подтвердите участие в игре</b>
-
-                📌 <b>{System.Net.WebUtility.HtmlEncode(session.Title)}</b>
-                📅 {session.ScheduledAt.FormatMoscow()} (МСК)
-
-                Ответьте кнопкой в групповом сообщении расписания.
-                """;
-
-            await directSender.SendAsync(
-                participants.Select(p => new DirectNotificationRecipient(p.TelegramId, p.DisplayName)),
-                directText,
-                "confirmation",
-                sessionId,
-                ct);
-        }
-
-        logger.LogInformation(
-            "Confirmation sent for session {SessionId} ({Title}), message_id={MessageId}",
-            sessionId, session.Title, message.MessageId);
-    }
-
-    internal static string FormatPlayerName(ParticipantInfo p) =>
-        p.TelegramUsername is not null ? $"@{p.TelegramUsername}" : p.DisplayName;
-}

src/GmRelay.Bot/Features/Reminders/SendJoinLink/SendJoinLinkHandler.cs

@@ -1,134 +0,0 @@
-using Dapper;
-using GmRelay.Bot.Features.Notifications;
-using GmRelay.Shared.Domain;
-using Npgsql;
-using Telegram.Bot;
-
-namespace GmRelay.Bot.Features.Reminders.SendJoinLink;
-
-// ── DTOs ─────────────────────────────────────────────────────────────
-
-internal sealed record JoinLinkSession(
-    Guid Id,
-    string Title,
-    string JoinLink,
-    DateTime ScheduledAt,
-    long TelegramChatId,
-    int? ThreadId,
-    string NotificationMode);
-
-internal sealed record ConfirmedPlayer(
-    long TelegramId,
-    string DisplayName,
-    string? TelegramUsername);
-
-// ── Handler ──────────────────────────────────────────────────────────
-
-/// <summary>
-/// Sends the join link to the group chat at T-5min, tagging all confirmed players.
-/// Called by SessionSchedulerService.
-/// </summary>
-public sealed class SendJoinLinkHandler(
-    NpgsqlDataSource dataSource,
-    ITelegramBotClient bot,
-    DirectSessionNotificationSender directSender,
-    ILogger<SendJoinLinkHandler> logger) : ISendJoinLinkHandler
-{
-    public async Task HandleAsync(Guid sessionId, CancellationToken ct)
-    {
-        await using var connection = await dataSource.OpenConnectionAsync(ct);
-
-        // 1. Load session
-        var session = await connection.QuerySingleOrDefaultAsync<JoinLinkSession>(
-            """
-            SELECT s.id, s.title, s.join_link AS JoinLink, s.scheduled_at AS ScheduledAt,
-                   g.telegram_chat_id AS TelegramChatId,
-                   s.thread_id AS ThreadId,
-                   s.notification_mode AS NotificationMode
-            FROM sessions s
-            JOIN game_groups g ON g.id = s.group_id
-            WHERE s.id = @SessionId
-              AND s.status = @Confirmed
-              AND s.link_message_id IS NULL
-            """,
-            new { SessionId = sessionId, Confirmed = SessionStatus.Confirmed });
-
-        if (session is null)
-        {
-            logger.LogWarning("Session {SessionId} not eligible for join link", sessionId);
-            return;
-        }
-
-        // 2. Load confirmed players
-        var players = (await connection.QueryAsync<ConfirmedPlayer>(
-            """
-            SELECT p.telegram_id    AS TelegramId,
-                   p.display_name    AS DisplayName,
-                   p.telegram_username AS TelegramUsername
-            FROM session_participants sp
-            JOIN players p ON p.id = sp.player_id
-            WHERE sp.session_id = @SessionId
-              AND sp.rsvp_status = @Confirmed
-              AND sp.registration_status = @Active
-            """,
-            new
-            {
-                SessionId = sessionId,
-                Confirmed = RsvpStatus.Confirmed,
-                Active = ParticipantRegistrationStatus.Active
-            })).ToList();
-
-        // 3. Build message with player mentions
-        var mentions = string.Join(", ", players.Select(p =>
-            p.TelegramUsername is not null ? $"@{p.TelegramUsername}" : p.DisplayName));
-
-        var text = $"""
-            🎮 Игра «{session.Title}» начинается через 5 минут!
-
-            🔗 Ссылка на подключение:
-            {session.JoinLink}
-
-            Участники: {mentions}
-
-            Хорошей игры! 🎲
-            """;
-
-        // 4. Send
-        var message = await bot.SendMessage(
-            chatId: session.TelegramChatId,
-            messageThreadId: session.ThreadId,
-            text: text,
-            cancellationToken: ct);
-
-        // 5. Mark as sent (idempotent — link_message_id IS NULL guard in query)
-        await connection.ExecuteAsync(
-            """
-            UPDATE sessions
-            SET    link_message_id = @MessageId, updated_at = now()
-            WHERE  id = @SessionId AND link_message_id IS NULL
-            """,
-            new { SessionId = sessionId, MessageId = message.MessageId });
-
-        var mode = SessionNotificationModeExtensions.FromDatabaseValue(session.NotificationMode);
-        if (mode.ShouldSendDirectMessages())
-        {
-            var directText = $"""
-                🎮 <b>Игра начинается через 5 минут</b>
-
-                📌 <b>{System.Net.WebUtility.HtmlEncode(session.Title)}</b>
-                🔗 {System.Net.WebUtility.HtmlEncode(session.JoinLink)}
-                """;
-
-            await directSender.SendAsync(
-                players.Select(p => new DirectNotificationRecipient(p.TelegramId, p.DisplayName)),
-                directText,
-                "join-link",
-                sessionId,
-                ct);
-        }
-
-        logger.LogInformation(
-            "Join link sent for session {SessionId} ({Title}), message_id={MessageId}",
-            sessionId, session.Title, message.MessageId);
-    }
-}

src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleTimeInputHandler.cs

@@ -1,6 +1,7 @@
 using Dapper;
 using GmRelay.Bot.Features.Notifications;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Sessions.RescheduleSession;
 using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
 using Npgsql;
@@ -17,12 +18,6 @@ internal sealed record AwaitingProposalDto(
     Guid Id, Guid SessionId, string Title, DateTime CurrentScheduledAt,
     Guid BatchId, int? BatchMessageId, long TelegramChatId, int? ThreadId, string NotificationMode);
 
-internal sealed record VoteParticipantDto(
-    Guid PlayerId,
-    string DisplayName,
-    string? TelegramUsername,
-    long TelegramId = 0);
-
 // ── Handler ──────────────────────────────────────────────────────────
 
 /// <summary>

src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleVoteHandler.cs

@@ -1,5 +1,6 @@
 using Dapper;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Sessions.RescheduleSession;
 using GmRelay.Shared.Platform;
 using Npgsql;
 using Telegram.Bot;
@@ -13,13 +14,6 @@ public sealed record HandleRescheduleVoteCommand(
     long ChatId,
     int MessageId);
 
-internal sealed record VoteProposalDto(
-    Guid Id,
-    Guid SessionId,
-    DateTimeOffset VotingDeadlineAt,
-    string Title,
-    DateTime CurrentScheduledAt);
-
 public sealed class HandleRescheduleVoteHandler(
     NpgsqlDataSource dataSource,
     ITelegramBotClient bot,

src/GmRelay.Bot/Features/Sessions/RescheduleSession/InitiateRescheduleHandler.cs

@@ -83,8 +83,8 @@ public sealed class InitiateRescheduleHandler(
         // 3. Create proposal in AwaitingTime status
         await connection.ExecuteAsync(
             """
-            INSERT INTO reschedule_proposals (session_id, proposed_by, status)
+            INSERT INTO reschedule_proposals (session_id, proposed_by, source_platform, status)
-            VALUES (@SessionId, @GmId, 'AwaitingTime')
+            VALUES (@SessionId, @GmId, 'Telegram', 'AwaitingTime')
             """,
             new { command.SessionId, GmId = command.TelegramUserId });
 

src/GmRelay.Bot/Features/Sessions/RescheduleSession/RescheduleVotingDeadlineService.cs

@@ -1,35 +1,25 @@
 using Dapper;
-using GmRelay.Bot.Features.Notifications;
+using GmRelay.Bot.Infrastructure.Telegram;
-using GmRelay.Bot.Infrastructure.Scheduling;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Notifications;
+using GmRelay.Shared.Features.Sessions.RescheduleSession;
 using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
 using Npgsql;
-using Telegram.Bot;
-using Telegram.Bot.Types.Enums;
-using GmRelay.Bot.Infrastructure.Telegram;
 
 namespace GmRelay.Bot.Features.Sessions.RescheduleSession;
 
-internal sealed record DueRescheduleProposalDto(
+internal sealed record TelegramProposalFieldsDto(
-    Guid Id,
-    Guid SessionId,
-    DateTimeOffset VotingDeadlineAt,
-    string Title,
-    DateTime CurrentScheduledAt,
-    Guid BatchId,
-    int? BatchMessageId,
     int? VoteMessageId,
+    int? BatchMessageId,
     long TelegramChatId,
-    int? ThreadId,
+    int? ThreadId);
-    string NotificationMode);
 
 public sealed class RescheduleVotingDeadlineService(
     NpgsqlDataSource dataSource,
-    ITelegramBotClient bot,
     IPlatformMessenger messenger,
-    DirectSessionNotificationSender directSender,
+    PlatformDirectNotificationSender directSender,
-    ISystemClock clock,
+    RescheduleVotingFinalizer finalizer,
     ILogger<RescheduleVotingDeadlineService> logger) : BackgroundService
 {
     protected override async Task ExecuteAsync(CancellationToken stoppingToken)
@@ -53,18 +43,7 @@ public sealed class RescheduleVotingDeadlineService(
     {
         try
         {
-            await using var connection = await dataSource.OpenConnectionAsync(ct);
+            var proposalIds = await finalizer.GetDueProposalIdsAsync("Telegram", ct);
-            var proposalIds = (await connection.QueryAsync<Guid>(
-                """
-                SELECT id
-                FROM reschedule_proposals
-                WHERE status = 'Voting'
-                  AND voting_deadline_at IS NOT NULL
-                  AND voting_deadline_at <= @Now
-                ORDER BY voting_deadline_at
-                LIMIT 25
-                """,
-                new { Now = clock.UtcNow.UtcDateTime })).ToList();
 
             foreach (var proposalId in proposalIds)
             {
@@ -82,212 +61,101 @@ public sealed class RescheduleVotingDeadlineService(
 
     private async Task FinalizeProposal(Guid proposalId, CancellationToken ct)
     {
-        await using var connection = await dataSource.OpenConnectionAsync(ct);
+        var result = await finalizer.FinalizeAsync(proposalId, ct);
-        await using var transaction = await connection.BeginTransactionAsync(ct);
+        if (result is null)
+            return;
 
-        var proposal = await connection.QuerySingleOrDefaultAsync<DueRescheduleProposalDto>(
+        if (result.SourcePlatform != "Telegram")
+        {
+            logger.LogInformation(
+                "Skipping Telegram message handling for proposal {ProposalId} with source platform {SourcePlatform}",
+                proposalId,
+                result.SourcePlatform);
+            return;
+        }
+
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+        var telegramFields = await connection.QuerySingleOrDefaultAsync<TelegramProposalFieldsDto>(
             """
-            SELECT rp.id AS Id,
+            SELECT rp.vote_message_id AS VoteMessageId,
-                   rp.session_id AS SessionId,
-                   rp.voting_deadline_at AS VotingDeadlineAt,
-                   rp.vote_message_id AS VoteMessageId,
-                   s.title AS Title,
-                   s.scheduled_at AS CurrentScheduledAt,
-                   s.batch_id AS BatchId,
                    s.batch_message_id AS BatchMessageId,
-                   s.notification_mode AS NotificationMode,
+                   g.telegram_chat_id AS TelegramChatId,
-                   s.thread_id AS ThreadId,
+                   s.thread_id AS ThreadId
-                   g.telegram_chat_id AS TelegramChatId
             FROM reschedule_proposals rp
             JOIN sessions s ON s.id = rp.session_id
             JOIN game_groups g ON g.id = s.group_id
             WHERE rp.id = @ProposalId
-              AND rp.status = 'Voting'
-              AND rp.voting_deadline_at IS NOT NULL
-              AND rp.voting_deadline_at <= @Now
-            FOR UPDATE
             """,
-            new { ProposalId = proposalId, Now = clock.UtcNow.UtcDateTime },
+            new { ProposalId = proposalId });
-            transaction);
 
-        if (proposal is null)
+        if (telegramFields is null)
+        {
+            logger.LogWarning("Could not find Telegram fields for proposal {ProposalId}", proposalId);
             return;
-
-        var participants = (await connection.QueryAsync<VoteParticipantDto>(
-            """
-            SELECT p.id AS PlayerId,
-                   p.display_name AS DisplayName,
-                   p.telegram_username AS TelegramUsername,
-                   p.telegram_id AS TelegramId
-            FROM session_participants sp
-            JOIN players p ON p.id = sp.player_id
-            WHERE sp.session_id = @SessionId
-              AND sp.is_gm = false
-              AND sp.registration_status = @Active
-            ORDER BY p.display_name
-            """,
-            new { proposal.SessionId, Active = ParticipantRegistrationStatus.Active },
-            transaction)).ToList();
-
-        var options = (await connection.QueryAsync<RescheduleOptionDto>(
-            """
-            SELECT id AS OptionId,
-                   display_order AS DisplayOrder,
-                   proposed_at AS ProposedAt
-            FROM reschedule_options
-            WHERE proposal_id = @ProposalId
-            ORDER BY display_order
-            """,
-            new { ProposalId = proposal.Id },
-            transaction)).ToList();
-
-        var votes = (await connection.QueryAsync<RescheduleOptionVoteDto>(
-            """
-            SELECT rov.option_id AS OptionId,
-                   p.id AS PlayerId,
-                   p.display_name AS DisplayName,
-                   p.telegram_username AS TelegramUsername
-            FROM reschedule_option_votes rov
-            JOIN players p ON p.id = rov.player_id
-            WHERE rov.proposal_id = @ProposalId
-            ORDER BY rov.voted_at, p.display_name
-            """,
-            new { ProposalId = proposal.Id },
-            transaction)).ToList();
-
-        var voteCounts = options
-            .Select(option => new RescheduleOptionVoteCount(
-                option.OptionId,
-                votes.Count(vote => vote.OptionId == option.OptionId)))
-            .ToList();
-        var decision = RescheduleVoteRules.SelectWinner(voteCounts);
-        var selectedOption = decision.SelectedOptionId is { } selectedOptionId
-            ? options.Single(x => x.OptionId == selectedOptionId)
-            : null;
-
-        if (selectedOption is not null)
-        {
-            await connection.ExecuteAsync(
-                """
-                UPDATE sessions
-                SET scheduled_at = @NewTime,
-                    status = @Status,
-                    confirmation_message_id = NULL,
-                    confirmation_sent_at = NULL,
-                    link_message_id = NULL,
-                    one_hour_reminder_processed_at = NULL,
-                    updated_at = now()
-                WHERE id = @SessionId
-                """,
-                new { NewTime = selectedOption.ProposedAt, proposal.SessionId, Status = SessionStatus.Planned },
-                transaction);
-
-            await connection.ExecuteAsync(
-                """
-                UPDATE session_participants
-                SET rsvp_status = 'Pending',
-                    responded_at = NULL
-                WHERE session_id = @SessionId
-                  AND is_gm = false
-                  AND registration_status = @Active
-                """,
-                new { proposal.SessionId, Active = ParticipantRegistrationStatus.Active },
-                transaction);
-
-            await connection.ExecuteAsync(
-                """
-                UPDATE reschedule_proposals
-                SET status = 'Approved',
-                    selected_option_id = @SelectedOptionId,
-                    proposed_at = @ProposedAt
-                WHERE id = @ProposalId
-                """,
-                new
-                {
-                    ProposalId = proposal.Id,
-                    SelectedOptionId = selectedOption.OptionId,
-                    ProposedAt = selectedOption.ProposedAt
-                },
-                transaction);
-        }
-        else
-        {
-            await connection.ExecuteAsync(
-                "UPDATE reschedule_proposals SET status = 'Rejected' WHERE id = @ProposalId",
-                new { ProposalId = proposal.Id },
-                transaction);
         }
 
-        var directRecipients = participants
+        var directRecipients = result.Participants
-            .Select(p => new DirectNotificationRecipient(p.TelegramId, p.DisplayName))
+            .Select(p => TelegramPlatformIds.User(p.TelegramId, p.DisplayName))
             .ToList();
 
-        await transaction.CommitAsync(ct);
+        await TryUpdateVoteMessage(result, telegramFields, ct);
 
-        await TryUpdateVoteMessage(proposal, options, participants, votes, decision, selectedOption, ct);
+        if (result.SelectedOption is not null)
-
-        if (selectedOption is not null)
         {
-            await TryUpdateBatchMessage(proposal, ct);
+            await TryUpdateBatchMessage(result, telegramFields, ct);
         }
 
-        var mode = SessionNotificationModeExtensions.FromDatabaseValue(proposal.NotificationMode);
+        var mode = SessionNotificationModeExtensions.FromDatabaseValue(result.NotificationMode);
         if (mode.ShouldSendDirectMessages())
         {
-            await SendDirectResult(proposal, directRecipients, decision, selectedOption, ct);
+            await SendDirectResult(result, directRecipients, ct);
         }
 
         logger.LogInformation(
-            "Finalized reschedule proposal {ProposalId} for session {SessionId} with outcome {Outcome}",
+            "Updated Telegram messages for finalized reschedule proposal {ProposalId} for session {SessionId}",
-            proposal.Id,
+            result.ProposalId,
-            proposal.SessionId,
+            result.SessionId);
-            decision.Outcome);
     }
 
     private async Task TryUpdateVoteMessage(
-        DueRescheduleProposalDto proposal,
+        RescheduleVotingFinalizerResult result,
-        IReadOnlyList<RescheduleOptionDto> options,
+        TelegramProposalFieldsDto telegramFields,
-        IReadOnlyList<VoteParticipantDto> participants,
-        IReadOnlyList<RescheduleOptionVoteDto> votes,
-        RescheduleVoteDecision decision,
-        RescheduleOptionDto? selectedOption,
         CancellationToken ct)
     {
-        if (proposal.VoteMessageId is null)
+        if (telegramFields.VoteMessageId is null)
             return;
 
         try
         {
-            var resultText = selectedOption is not null
+            await messenger.UpdateRescheduleVoteAsync(
-                ? $"✅ <b>Голосование завершено.</b>\nПобедил вариант {selectedOption.DisplayOrder}: <b>{selectedOption.ProposedAt.FormatMoscow()}</b> (МСК)."
+                new PlatformRescheduleVoteUpdate(
-                : $"❌ <b>Голосование завершено.</b>\n{System.Net.WebUtility.HtmlEncode(decision.Reason)}";
+                    TelegramPlatformIds.Group(telegramFields.TelegramChatId, telegramFields.ThreadId),
-
+                    TelegramPlatformIds.Message(
-            var text = $"""
+                        telegramFields.TelegramChatId,
-                {HandleRescheduleTimeInputHandler.BuildVotingMessage(
+                        telegramFields.ThreadId,
-                    proposal.Title,
+                        telegramFields.VoteMessageId.Value),
-                    proposal.CurrentScheduledAt,
+                    result.ProposalId,
-                    proposal.VotingDeadlineAt,
+                    result.SessionId,
-                    options,
+                    result.Title,
-                    participants,
+                    result.CurrentScheduledAt,
-                    votes)}
+                    result.VotingDeadlineAt,
-
+                    result.Decision,
-                {resultText}
+                    result.SelectedOption,
-                """;
+                    result.Options,
-
+                    result.Votes,
-            await bot.EditMessageText(
+                    result.Participants),
-                chatId: proposal.TelegramChatId,
+                ct);
-                messageId: proposal.VoteMessageId.Value,
-                text: text,
-                parseMode: ParseMode.Html,
-                cancellationToken: ct);
         }
         catch (Exception ex)
         {
-            logger.LogWarning(ex, "Failed to update finalized reschedule vote message for proposal {ProposalId}", proposal.Id);
+            logger.LogWarning(ex, "Failed to update finalized reschedule vote message for proposal {ProposalId}", result.ProposalId);
         }
     }
 
-    private async Task TryUpdateBatchMessage(DueRescheduleProposalDto proposal, CancellationToken ct)
+    private async Task TryUpdateBatchMessage(
+        RescheduleVotingFinalizerResult result,
+        TelegramProposalFieldsDto telegramFields,
+        CancellationToken ct)
     {
         try
         {
@@ -295,7 +163,7 @@ public sealed class RescheduleVotingDeadlineService(
 
             var batchSessions = (await connection.QueryAsync<SessionBatchDto>(
                 "SELECT id AS SessionId, scheduled_at AS ScheduledAt, status AS Status, max_players AS MaxPlayers, join_link AS JoinLink FROM sessions WHERE batch_id = @BatchId ORDER BY scheduled_at",
-                new { proposal.BatchId })).ToList();
+                new { result.BatchId })).ToList();
 
             var batchParticipants = (await connection.QueryAsync<ParticipantBatchDto>(
                 """
@@ -309,60 +177,49 @@ public sealed class RescheduleVotingDeadlineService(
                 WHERE s.batch_id = @BatchId AND sp.is_gm = false
                 ORDER BY sp.registration_status ASC, sp.created_at ASC, sp.responded_at ASC, p.created_at ASC
                 """,
-                new { proposal.BatchId })).ToList();
+                new { result.BatchId })).ToList();
 
-            if (proposal.BatchMessageId.HasValue)
+            if (telegramFields.BatchMessageId.HasValue)
             {
-                var view = SessionBatchViewBuilder.Build(proposal.Title, batchSessions, batchParticipants);
+                var view = SessionBatchViewBuilder.Build(result.Title, batchSessions, batchParticipants);
 
                 await messenger.UpdateScheduleAsync(
                     new PlatformScheduleMessage(
-                        TelegramPlatformIds.Group(proposal.TelegramChatId, proposal.ThreadId),
+                        TelegramPlatformIds.Group(telegramFields.TelegramChatId, telegramFields.ThreadId),
                         view,
-                        TelegramPlatformIds.Message(proposal.TelegramChatId, proposal.ThreadId, proposal.BatchMessageId.Value)),
+                        TelegramPlatformIds.Message(telegramFields.TelegramChatId, telegramFields.ThreadId, telegramFields.BatchMessageId.Value)),
                     ct);
             }
             else
             {
                 await messenger.SendGroupMessageAsync(
-                    TelegramPlatformIds.Group(proposal.TelegramChatId, proposal.ThreadId),
+                    TelegramPlatformIds.Group(telegramFields.TelegramChatId, telegramFields.ThreadId),
-                    $"📣 Расписание обновлено после голосования за перенос сессии «{System.Net.WebUtility.HtmlEncode(proposal.Title)}».",
+                    $"Расписание обновлено после голосования за перенос сессии \"{System.Net.WebUtility.HtmlEncode(result.Title)}\".",
                     ct);
             }
         }
         catch (Exception ex)
         {
-            logger.LogWarning(ex, "Failed to update batch message for finalized proposal {ProposalId}", proposal.Id);
+            logger.LogWarning(ex, "Failed to update batch message for finalized proposal {ProposalId}", result.ProposalId);
         }
     }
 
     private async Task SendDirectResult(
-        DueRescheduleProposalDto proposal,
+        RescheduleVotingFinalizerResult result,
-        IReadOnlyList<DirectNotificationRecipient> recipients,
+        IReadOnlyList<PlatformUser> recipients,
-        RescheduleVoteDecision decision,
-        RescheduleOptionDto? selectedOption,
         CancellationToken ct)
     {
-        var htmlText = selectedOption is not null
-            ? $"""
-                ✅ <b>Сессия перенесена по итогам голосования</b>
-
-                📌 <b>{System.Net.WebUtility.HtmlEncode(proposal.Title)}</b>
-                📅 Новое время: <b>{selectedOption.ProposedAt.FormatMoscow()}</b> (МСК)
-                """
-            : $"""
-                ❌ <b>Перенос сессии отклонён по итогам голосования</b>
-
-                📌 <b>{System.Net.WebUtility.HtmlEncode(proposal.Title)}</b>
-                📅 Время остаётся прежним: <b>{proposal.CurrentScheduledAt.FormatMoscow()}</b> (МСК)
-                Причина: {System.Net.WebUtility.HtmlEncode(decision.Reason)}
-                """;
-
         await directSender.SendAsync(
+            result.SelectedOption is not null
+                ? PlatformDirectSessionNotificationKind.RescheduleApproved
+                : PlatformDirectSessionNotificationKind.RescheduleRejected,
             recipients,
-            htmlText,
+            result.SessionId,
-            selectedOption is not null ? "reschedule-vote-approved" : "reschedule-vote-rejected",
+            result.Title,
-            proposal.SessionId,
+            result.SelectedOption?.ProposedAt.UtcDateTime ?? result.CurrentScheduledAt,
+            joinLink: null,
+            actorDisplayName: null,
+            reason: result.SelectedOption is null ? result.Decision.Reason : null,
             ct);
     }
 }

src/GmRelay.Bot/Infrastructure/Scheduling/ISystemClock.cs

@@ -1,9 +1,6 @@
-namespace GmRelay.Bot.Infrastructure.Scheduling;
+using GmRelay.Shared.Platform;
 
-public interface ISystemClock
+namespace GmRelay.Bot.Infrastructure.Scheduling;
-{
-    DateTimeOffset UtcNow { get; }
-}
 
 public sealed class SystemClock : ISystemClock
 {

src/GmRelay.Bot/Infrastructure/Telegram/TelegramPlatformMessenger.cs

@@ -1,4 +1,6 @@
 using System.Globalization;
+using GmRelay.Bot.Features.Sessions.RescheduleSession;
+using GmRelay.Shared.Domain;
 using GmRelay.Shared.Platform;
 using Telegram.Bot;
 using Telegram.Bot.Types;
@@ -125,6 +127,135 @@ public sealed class TelegramPlatformMessenger(
             cancellationToken: ct);
     }
 
+    public async Task<PlatformMessageRef> SendConfirmationRequestAsync(PlatformConfirmationRequest request, CancellationToken ct)
+    {
+        EnsureTelegram(request.Group.Platform);
+
+        var chatId = ParseLong(request.Group.ExternalGroupId);
+        var threadId = ParseNullableInt(request.Group.ExternalThreadId);
+        var message = await bot.SendMessage(
+            chatId: chatId,
+            messageThreadId: threadId,
+            text: BuildConfirmationText(request),
+            parseMode: ParseMode.Html,
+            replyMarkup: BuildRsvpKeyboard(request.SessionId),
+            cancellationToken: ct);
+
+        return TelegramPlatformIds.Message(chatId, threadId, message.MessageId);
+    }
+
+    public async Task UpdateConfirmationRequestAsync(PlatformRsvpMessageUpdate update, CancellationToken ct)
+    {
+        var request = update.Request;
+        EnsureTelegram(request.Group.Platform);
+        var existingMessage = request.ExistingMessage
+            ?? throw new ArgumentException("Existing confirmation message reference is required.", nameof(update));
+
+        EnsureTelegram(existingMessage.Platform);
+        await bot.EditMessageText(
+            chatId: ParseLong(existingMessage.ExternalGroupId),
+            messageId: ParseInt(existingMessage.ExternalMessageId),
+            text: BuildConfirmationText(request),
+            parseMode: ParseMode.Html,
+            replyMarkup: update.DisableActions ? null : BuildRsvpKeyboard(request.SessionId),
+            cancellationToken: ct);
+    }
+
+    public async Task<PlatformMessageRef> SendJoinLinkNotificationAsync(
+        PlatformJoinLinkNotification notification,
+        CancellationToken ct)
+    {
+        EnsureTelegram(notification.Group.Platform);
+
+        var chatId = ParseLong(notification.Group.ExternalGroupId);
+        var threadId = ParseNullableInt(notification.Group.ExternalThreadId);
+        var message = await bot.SendMessage(
+            chatId: chatId,
+            messageThreadId: threadId,
+            text: BuildJoinLinkText(notification),
+            cancellationToken: ct);
+
+        return TelegramPlatformIds.Message(chatId, threadId, message.MessageId);
+    }
+
+    public Task SendDirectSessionNotificationAsync(
+        PlatformDirectSessionNotification notification,
+        CancellationToken ct)
+    {
+        EnsureTelegram(notification.Recipient.Platform);
+        return bot.SendMessage(
+            chatId: ParseLong(notification.Recipient.ExternalUserId),
+            text: BuildDirectNotificationText(notification),
+            parseMode: ParseMode.Html,
+            cancellationToken: ct);
+    }
+
+    public async Task SendRsvpOutcomeAsync(PlatformRsvpOutcomeNotification notification, CancellationToken ct)
+    {
+        switch (notification.Kind)
+        {
+            case PlatformRsvpOutcomeKind.GroupAllConfirmed:
+                if (notification.Group is null)
+                {
+                    throw new ArgumentException("Group notification requires a group.", nameof(notification));
+                }
+
+                EnsureTelegram(notification.Group.Platform);
+                await bot.SendMessage(
+                    chatId: ParseLong(notification.Group.ExternalGroupId),
+                    messageThreadId: ParseNullableInt(notification.Group.ExternalThreadId),
+                    text: $"🎉 Игра «{notification.Title}» подтверждена! Все участники на месте.",
+                    cancellationToken: ct);
+                break;
+
+            case PlatformRsvpOutcomeKind.GmAllConfirmed:
+            case PlatformRsvpOutcomeKind.GmPlayerDeclined:
+                foreach (var recipient in notification.Recipients)
+                {
+                    EnsureTelegram(recipient.Platform);
+                    await bot.SendMessage(
+                        chatId: ParseLong(recipient.ExternalUserId),
+                        text: BuildRsvpOutcomeDirectText(notification),
+                        parseMode: ParseMode.Html,
+                        cancellationToken: ct);
+                }
+
+                break;
+
+            default:
+                throw new ArgumentOutOfRangeException(nameof(notification), notification.Kind, "Unknown RSVP outcome kind.");
+        }
+    }
+
+    public Task UpdateRescheduleVoteAsync(PlatformRescheduleVoteUpdate update, CancellationToken ct)
+    {
+        EnsureTelegram(update.Group.Platform);
+        EnsureTelegram(update.ExistingMessage.Platform);
+
+        var resultText = update.SelectedOption is not null
+            ? $"✅ <b>Голосование завершено.</b>\nПобедил вариант {update.SelectedOption.DisplayOrder}: <b>{update.SelectedOption.ProposedAt.FormatMoscow()}</b> (МСК)."
+            : $"❌ <b>Голосование завершено.</b>\n{System.Net.WebUtility.HtmlEncode(update.Decision.Reason)}";
+
+        var text = $"""
+            {HandleRescheduleTimeInputHandler.BuildVotingMessage(
+                update.Title,
+                update.CurrentScheduledAt,
+                update.VotingDeadlineAt,
+                update.Options,
+                update.Participants,
+                update.Votes)}
+
+            {resultText}
+            """;
+
+        return bot.EditMessageText(
+            chatId: ParseLong(update.ExistingMessage.ExternalGroupId),
+            messageId: ParseInt(update.ExistingMessage.ExternalMessageId),
+            text: text,
+            parseMode: ParseMode.Html,
+            cancellationToken: ct);
+    }
+
     private async Task<Message> SendScheduleTextMessage(
         long chatId,
         int? threadId,
@@ -139,6 +270,134 @@ public sealed class TelegramPlatformMessenger(
             replyMarkup: markup,
             cancellationToken: ct);
 
+    private static string BuildConfirmationText(PlatformConfirmationRequest request)
+    {
+        var confirmed = request.Participants.Where(p => p.RsvpStatus == RsvpStatus.Confirmed).ToList();
+        var declined = request.Participants.Where(p => p.RsvpStatus == RsvpStatus.Declined).ToList();
+        var pending = request.Participants.Where(p => p.RsvpStatus == RsvpStatus.Pending).ToList();
+
+        var lines = new List<string>
+        {
+            $"🎲 Подтвердите участие в «{System.Net.WebUtility.HtmlEncode(request.Title)}»",
+            $"📅 {request.ScheduledAt.FormatMoscow()} (МСК)",
+            string.Empty
+        };
+
+        foreach (var participant in confirmed)
+        {
+            lines.Add($"   ✅ {FormatTelegramParticipant(participant)}");
+        }
+
+        foreach (var participant in declined)
+        {
+            lines.Add($"   ❌ <s>{FormatTelegramParticipant(participant)}</s>");
+        }
+
+        foreach (var participant in pending)
+        {
+            lines.Add($"   ⏳ {FormatTelegramParticipant(participant)}");
+        }
+
+        lines.Add(string.Empty);
+
+        if (request.Participants.Count > 0 && confirmed.Count == request.Participants.Count)
+        {
+            lines.Add($"Статус: ✅ все подтвердили ({confirmed.Count}/{request.Participants.Count})");
+        }
+        else if (declined.Count > 0)
+        {
+            lines.Add($"Статус: ⚠️ есть отказы ({confirmed.Count}/{request.Participants.Count} подтвердили)");
+        }
+        else
+        {
+            lines.Add($"Статус: ожидаем подтверждения ({confirmed.Count}/{request.Participants.Count})");
+        }
+
+        return string.Join("\n", lines);
+    }
+
+    private static string BuildJoinLinkText(PlatformJoinLinkNotification notification)
+    {
+        var mentions = string.Join(", ", notification.ConfirmedPlayers.Select(FormatTelegramParticipant));
+
+        return $"""
+            🎮 Игра «{notification.Title}» начинается через 5 минут!
+
+            🔗 Ссылка на подключение:
+            {notification.JoinLink}
+
+            Участники: {mentions}
+
+            Хорошей игры! 🎲
+            """;
+    }
+
+    private static string BuildDirectNotificationText(PlatformDirectSessionNotification notification) =>
+        notification.Kind switch
+        {
+            PlatformDirectSessionNotificationKind.ConfirmationRequest => $"""
+                🎲 <b>Подтвердите участие в игре</b>
+
+                📌 <b>{System.Net.WebUtility.HtmlEncode(notification.Title)}</b>
+                📅 {notification.ScheduledAt.FormatMoscow()} (МСК)
+
+                Ответьте кнопкой в групповом сообщении расписания.
+                """,
+            PlatformDirectSessionNotificationKind.OneHourReminder => $"""
+                ⏰ <b>Игра начнётся примерно через 1 час</b>
+
+                📌 <b>{System.Net.WebUtility.HtmlEncode(notification.Title)}</b>
+                📅 {notification.ScheduledAt.FormatMoscow()} (МСК)
+                🔗 {System.Net.WebUtility.HtmlEncode(notification.JoinLink ?? string.Empty)}
+                """,
+            PlatformDirectSessionNotificationKind.JoinLink => $"""
+                🎮 <b>Игра начинается через 5 минут</b>
+
+                📌 <b>{System.Net.WebUtility.HtmlEncode(notification.Title)}</b>
+                🔗 {System.Net.WebUtility.HtmlEncode(notification.JoinLink ?? string.Empty)}
+                """,
+            PlatformDirectSessionNotificationKind.RescheduleApproved => $"""
+                ✅ <b>Сессия перенесена по итогам голосования</b>
+
+                📌 <b>{System.Net.WebUtility.HtmlEncode(notification.Title)}</b>
+                📅 Новое время: <b>{notification.ScheduledAt.FormatMoscow()}</b> (МСК)
+                """,
+            PlatformDirectSessionNotificationKind.RescheduleRejected => $"""
+                ❌ <b>Перенос сессии отклонён по итогам голосования</b>
+
+                📌 <b>{System.Net.WebUtility.HtmlEncode(notification.Title)}</b>
+                📅 Время остаётся прежним: <b>{notification.ScheduledAt.FormatMoscow()}</b> (МСК)
+                Причина: {System.Net.WebUtility.HtmlEncode(notification.Reason ?? string.Empty)}
+                """,
+            _ => BuildFallbackDirectText(notification)
+        };
+
+    private static string BuildFallbackDirectText(PlatformDirectSessionNotification notification) =>
+        $"<b>{System.Net.WebUtility.HtmlEncode(notification.Title)}</b>\n{notification.ScheduledAt.FormatMoscow()} (МСК)";
+
+    private static string BuildRsvpOutcomeDirectText(PlatformRsvpOutcomeNotification notification) =>
+        notification.Kind switch
+        {
+            PlatformRsvpOutcomeKind.GmAllConfirmed =>
+                $"✅ Все подтвердили участие в «{System.Net.WebUtility.HtmlEncode(notification.Title)}» ({notification.ScheduledAt.FormatMoscow()} МСК).",
+            PlatformRsvpOutcomeKind.GmPlayerDeclined =>
+                $"🚨 Отмена! {System.Net.WebUtility.HtmlEncode(notification.ActorDisplayName ?? "Игрок")} не сможет прийти на игру «{System.Net.WebUtility.HtmlEncode(notification.Title)}».",
+            _ => System.Net.WebUtility.HtmlEncode(notification.Title)
+        };
+
+    private static InlineKeyboardMarkup BuildRsvpKeyboard(Guid sessionId) =>
+        new([
+            [
+                InlineKeyboardButton.WithCallbackData("✅ Буду", $"rsvp:confirm:{sessionId}"),
+                InlineKeyboardButton.WithCallbackData("❌ Не смогу", $"rsvp:decline:{sessionId}")
+            ]
+        ]);
+
+    private static string FormatTelegramParticipant(PlatformSessionParticipant participant) =>
+        participant.User.ExternalUsername is not null
+            ? $"@{participant.User.ExternalUsername}"
+            : System.Net.WebUtility.HtmlEncode(participant.User.DisplayName);
+
     private async Task TrySendScheduleImageOnly(
         long chatId,
         int? threadId,

src/GmRelay.Bot/Infrastructure/Telegram/UpdateRouter.cs

@@ -1,7 +1,8 @@
 // ... UpdateRouter will have CancelSessionHandler and cancel_session route instead of close_recruitment
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Confirmation.HandleRsvp;
+using GmRelay.Shared.Features.Sessions.CreateSession;
 using GmRelay.Shared.Rendering;
-using GmRelay.Bot.Features.Confirmation.HandleRsvp;
 using GmRelay.Bot.Features.Sessions.CreateSession;
 using GmRelay.Bot.Features.Sessions.ListSessions;
 using GmRelay.Bot.Features.Sessions.ExportCalendar;
@@ -186,11 +187,11 @@ public sealed class UpdateRouter(
 
             var command = new HandleRsvpCommand(
                 SessionId: sessionId,
-                TelegramUserId: query.From.Id,
+                User: user,
                 Status: status,
-                CallbackQueryId: query.Id,
+                InteractionId: query.Id,
-                ChatId: message.Chat.Id,
+                Group: group,
-                MessageId: message.MessageId);
+                ConfirmationMessage: scheduleMessage);
 
             await rsvpHandler.HandleAsync(command, ct);
         }

src/GmRelay.Bot/Migrations/V018__discord_reschedule_proposals.sql

@@ -0,0 +1,19 @@
+-- =============================================================
+-- V018: Add platform columns to reschedule_proposals
+-- =============================================================
+-- Add platform columns to reschedule_proposals to support Discord reschedule voting.
+-- proposed_by is made nullable so Discord proposals can leave it NULL
+-- (Discord snowflakes don't fit in BIGINT safely).
+-- =============================================================
+
+ALTER TABLE reschedule_proposals
+    ALTER COLUMN proposed_by DROP NOT NULL;
+
+ALTER TABLE reschedule_proposals
+    ADD COLUMN source_platform VARCHAR(50),
+    ADD COLUMN proposed_by_external_user_id VARCHAR(255);
+
+UPDATE reschedule_proposals
+SET source_platform = 'Telegram',
+    proposed_by_external_user_id = proposed_by::TEXT
+WHERE source_platform IS NULL;

src/GmRelay.Bot/Migrations/V019__audit_log_platform_identity.sql

@@ -0,0 +1,18 @@
+-- =============================================================
+-- V019: Rename session_audit_log.actor_telegram_id to actor_external_user_id
+-- =============================================================
+-- Scope: Support platform-agnostic audit log identity.
+-- =============================================================
+
+ALTER TABLE session_audit_log
+    ADD COLUMN actor_external_user_id VARCHAR(255);
+
+UPDATE session_audit_log
+   SET actor_external_user_id = actor_telegram_id::TEXT
+ WHERE actor_external_user_id IS NULL;
+
+ALTER TABLE session_audit_log
+    ALTER COLUMN actor_external_user_id SET NOT NULL;
+
+ALTER TABLE session_audit_log
+    DROP COLUMN actor_telegram_id;

src/GmRelay.Bot/Migrations/V020__player_identity_links.sql

@@ -0,0 +1,37 @@
+-- =============================================================
+-- V020: Player identity linking for unified multi-platform accounts
+-- =============================================================
+-- Scope: Allow linking multiple platform identities (Telegram, Discord)
+-- to a single "primary" player account. All group/session permissions
+-- resolve through the effective (primary) player id.
+-- =============================================================
+
+-- player_links: secondary player → primary player (1:1 on secondary)
+CREATE TABLE player_links (
+    id                    UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    primary_player_id     UUID NOT NULL REFERENCES players(id) ON DELETE CASCADE,
+    secondary_player_id   UUID NOT NULL UNIQUE REFERENCES players(id) ON DELETE CASCADE,
+    linked_at             TIMESTAMPTZ NOT NULL DEFAULT now(),
+    linked_by_player_id   UUID REFERENCES players(id) ON DELETE SET NULL,
+    -- Prevent self-linking at the DB level
+    CONSTRAINT no_self_link CHECK (primary_player_id <> secondary_player_id)
+);
+
+CREATE INDEX ix_player_links_primary_player_id
+    ON player_links(primary_player_id);
+
+-- identity_audit_log: security-sensitive link/unlink actions
+CREATE TABLE identity_audit_log (
+    id                      UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    player_id               UUID NOT NULL REFERENCES players(id) ON DELETE CASCADE,
+    action                  VARCHAR(50) NOT NULL,   -- 'link', 'unlink', 'link_attempt_conflict'
+    target_platform         VARCHAR(50),
+    target_external_user_id VARCHAR(255),
+    performed_at            TIMESTAMPTZ NOT NULL DEFAULT now(),
+    performed_by_player_id  UUID REFERENCES players(id) ON DELETE SET NULL
+);
+
+CREATE INDEX ix_identity_audit_log_player_id
+    ON identity_audit_log(player_id);
+CREATE INDEX ix_identity_audit_log_performed_at
+    ON identity_audit_log(performed_at DESC);

src/GmRelay.Bot/Migrations/V021__add_avatar_url.sql

@@ -0,0 +1,8 @@
+-- =============================================================
+-- V021: Add avatar_url column to players table
+-- =============================================================
+-- Scope: Support storing avatar URLs for Discord and other platforms.
+-- =============================================================
+
+ALTER TABLE players
+    ADD COLUMN avatar_url VARCHAR(500);

src/GmRelay.Bot/Migrations/V022__fix_discord_telegram_links.sql

@@ -0,0 +1,16 @@
+-- =============================================================
+-- V022: Fix incorrectly oriented player_links for Discord↔Telegram
+-- =============================================================
+-- Scope: Reverse player_links where Discord was incorrectly made primary
+-- and Telegram secondary. Telegram (with historical group/session data)
+-- must always be the primary account.
+-- =============================================================
+
+UPDATE player_links pl
+SET primary_player_id   = pl.secondary_player_id,
+    secondary_player_id = pl.primary_player_id
+FROM players p1, players p2
+WHERE pl.primary_player_id = p1.id
+  AND pl.secondary_player_id = p2.id
+  AND p1.platform = 'Discord'
+  AND p2.platform = 'Telegram';

src/GmRelay.Bot/Program.cs

@@ -1,15 +1,18 @@
-using GmRelay.Bot.Features.Confirmation.HandleRsvp;
-using GmRelay.Bot.Features.Confirmation.SendConfirmation;
 using GmRelay.Bot.Features.Notifications;
-using GmRelay.Bot.Features.Reminders.SendJoinLink;
-using GmRelay.Bot.Features.Reminders.SendOneHourReminder;
 using GmRelay.Bot.Features.Sessions.CreateSession;
 using GmRelay.Bot.Features.Sessions.RescheduleSession;
 using GmRelay.Bot.Infrastructure.Database;
+using GmRelay.Shared.Features.Sessions.RescheduleSession;
 using GmRelay.Bot.Infrastructure.Health;
 using GmRelay.Bot.Infrastructure.Logging;
-using GmRelay.Bot.Infrastructure.Scheduling;
 using GmRelay.Bot.Infrastructure.Telegram;
+using GmRelay.Shared.Features.Confirmation.HandleRsvp;
+using GmRelay.Shared.Features.Confirmation.SendConfirmation;
+using GmRelay.Shared.Features.Notifications;
+using GmRelay.Shared.Features.Reminders.SendJoinLink;
+using GmRelay.Shared.Features.Reminders.SendOneHourReminder;
+using GmRelay.Shared.Features.Sessions.CreateSession;
+using GmRelay.Shared.Infrastructure.Scheduling;
 using GmRelay.Shared.Platform;
 using Npgsql;
 using Telegram.Bot;
@@ -52,17 +55,19 @@ builder.Services.AddSingleton<ITelegramBotClient>(sp =>
 });
 builder.Services.AddSingleton<ITelegramUpdateSource, TelegramUpdateSource>();
 builder.Services.AddSingleton<IPlatformMessenger, TelegramPlatformMessenger>();
+builder.Services.AddSingleton(new PlatformSchedulerOptions(PlatformKind.Telegram));
 
 // ── Feature handlers (explicit registration — AOT safe) ──────────────
 builder.Services.AddSingleton<SendConfirmationHandler>();
 builder.Services.AddSingleton<ISendConfirmationHandler>(sp => sp.GetRequiredService<SendConfirmationHandler>());
-builder.Services.AddSingleton<DirectSessionNotificationSender>();
+builder.Services.AddSingleton<PlatformDirectNotificationSender>();
 builder.Services.AddSingleton<HandleRsvpHandler>();
 builder.Services.AddSingleton<SendJoinLinkHandler>();
 builder.Services.AddSingleton<ISendJoinLinkHandler>(sp => sp.GetRequiredService<SendJoinLinkHandler>());
 builder.Services.AddSingleton<SendOneHourReminderHandler>();
 builder.Services.AddSingleton<ISendOneHourReminderHandler>(sp => sp.GetRequiredService<SendOneHourReminderHandler>());
 builder.Services.AddSingleton<CreateSessionHandler>();
+builder.Services.AddSingleton<IScheduleMessageUpdateLock, ScheduleMessageUpdateLock>();
 builder.Services.AddSingleton<JoinSessionHandler>();
 builder.Services.AddSingleton<LeaveSessionHandler>();
 builder.Services.AddSingleton<PromoteWaitlistedPlayerHandler>();
@@ -73,6 +78,9 @@ builder.Services.AddSingleton<GmRelay.Bot.Features.Sessions.ExportCalendar.Expor
 builder.Services.AddSingleton<InitiateRescheduleHandler>();
 builder.Services.AddSingleton<HandleRescheduleTimeInputHandler>();
 builder.Services.AddSingleton<HandleRescheduleVoteHandler>();
+builder.Services.AddSingleton<RescheduleVotingFinalizer>();
+
+builder.Services.AddSingleton<DirectSessionNotificationSender>();
 
 // ── Telegram infrastructure ──────────────────────────────────────────
 builder.Services.AddSingleton<UpdateRouter>();
@@ -81,7 +89,7 @@ builder.Services.AddHostedService<TelegramMiniAppMenuButtonService>();
 builder.Services.AddHostedService<TelegramBotService>();
 
 // ── Clock and scheduling ──────────────────────────────────────────────
-builder.Services.AddSingleton<ISystemClock, SystemClock>();
+builder.Services.AddSingleton<ISystemClock, GmRelay.Bot.Infrastructure.Scheduling.SystemClock>();
 builder.Services.AddSingleton<ISessionTriggerStore, DbSessionTriggerStore>();
 
 // ── Session scheduler ────────────────────────────────────────────────

src/GmRelay.Bot/packages.lock.json

@@ -661,7 +661,13 @@
         }
       },
       "gmrelay.shared": {
-        "type": "Project"
+        "type": "Project",
+        "dependencies": {
+          "Dapper": "[2.1.72, )",
+          "Microsoft.Extensions.Hosting.Abstractions": "[10.0.5, )",
+          "Microsoft.Extensions.Logging.Abstractions": "[10.0.5, )",
+          "Npgsql": "[10.0.2, )"
+        }
       }
     },
     "net10.0/win-x64": {

src/GmRelay.DiscordBot/Dockerfile

@@ -13,8 +13,13 @@ WORKDIR /src/src/GmRelay.DiscordBot
 RUN dotnet publish "GmRelay.DiscordBot.csproj" -c Release -o /app/publish /p:UseAppHost=false
 
 # Stage 2: Runtime
-FROM mcr.microsoft.com/dotnet/runtime:10.0-noble AS final
+FROM mcr.microsoft.com/dotnet/aspnet:10.0-noble AS final
 WORKDIR /app
+
+# Install wget for healthcheck
+RUN apt-get update && apt-get install -y --no-install-recommends wget \
+    && rm -rf /var/lib/apt/lists/*
+
 COPY --from=build /app/publish .
 USER $APP_UID
 ENTRYPOINT ["dotnet", "GmRelay.DiscordBot.dll"]

src/GmRelay.DiscordBot/Features/Sessions/DiscordRescheduleCommand.cs

@@ -0,0 +1,117 @@
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+using NetCord.Rest;
+using NetCord.Services.ApplicationCommands;
+
+[SlashCommand("reschedule", "Initiate reschedule voting for a session")]
+public class DiscordRescheduleCommand : ApplicationCommandModule<SlashCommandContext>
+{
+    private readonly DiscordRescheduleHandler _handler;
+    private readonly ILogger<DiscordRescheduleCommand> _logger;
+
+    public DiscordRescheduleCommand(DiscordRescheduleHandler handler, ILogger<DiscordRescheduleCommand> logger)
+    {
+        _handler = handler;
+        _logger = logger;
+    }
+
+    public async Task ExecuteAsync(
+        [SlashCommandParameter(Name = "session", Description = "Session ID to reschedule")] string sessionIdText,
+        [SlashCommandParameter(Name = "option1", Description = "First time option (YYYY-MM-DD HH:mm)")] string option1,
+        [SlashCommandParameter(Name = "option2", Description = "Second time option (YYYY-MM-DD HH:mm)")] string option2,
+        [SlashCommandParameter(Name = "option3", Description = "Third time option (optional)")] string? option3 = null,
+        [SlashCommandParameter(Name = "deadline", Description = "Voting deadline (YYYY-MM-DD HH:mm)")] string deadline = "")
+    {
+        var guild = Context.Guild
+            ?? throw new InvalidOperationException("This command can only be used in a guild.");
+
+        if (!Guid.TryParse(sessionIdText, out var sessionId))
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message("❌ Некорректный ID сессии."));
+            return;
+        }
+
+        var options = new List<string> { option1, option2 };
+        if (!string.IsNullOrWhiteSpace(option3))
+            options.Add(option3);
+
+        var parsedOptions = new List<DateTimeOffset>();
+        foreach (var opt in options)
+        {
+            var result = DiscordNewSessionHandler.ParseTimeInput(opt);
+            if (!result.IsSuccess)
+            {
+                await Context.Interaction.SendResponseAsync(
+                    InteractionCallback.Message($"❌ {opt}: {result.Error}"));
+                return;
+            }
+            parsedOptions.Add(result.Value);
+        }
+
+        var deadlineResult = DiscordNewSessionHandler.ParseTimeInput(deadline);
+        if (!deadlineResult.IsSuccess)
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message($"❌ Дедлайн: {deadlineResult.Error}"));
+            return;
+        }
+
+        if (deadlineResult.Value >= parsedOptions.Min())
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message("❌ Дедлайн должен быть раньше первого варианта времени."));
+            return;
+        }
+
+        var resolvedPermissions = GetResolvedPermissions(guild, Context.User.Id);
+
+        try
+        {
+            var result = await _handler.HandleAsync(
+                guildId: guild.Id.ToString(),
+                channelId: Context.Channel.Id.ToString(),
+                userId: Context.User.Id,
+                userDisplayName: Context.User.GlobalName ?? Context.User.Username,
+                resolvedPermissions: resolvedPermissions,
+                guildOwnerId: guild.OwnerId,
+                sessionId: sessionId,
+                options: parsedOptions,
+                deadline: deadlineResult.Value,
+                CancellationToken.None);
+
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message(
+                    $"🗳 Голосование за перенос запущено! Дедлайн: {deadlineResult.Value:yyyy-MM-dd HH:mm} UTC."));
+        }
+        catch (UnauthorizedAccessException ex)
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message($":no_entry: {ex.Message}"));
+        }
+        catch (InvalidOperationException ex)
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message($":warning: {ex.Message}"));
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Failed to initiate reschedule for session {SessionId}", sessionId);
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message(":boom: Ошибка при запуске голосования."));
+        }
+    }
+
+    private static ulong GetResolvedPermissions(NetCord.Gateway.Guild guild, ulong userId)
+    {
+        if (!guild.Users.TryGetValue(userId, out var guildUser))
+            return 0;
+        ulong resolved = 0;
+        foreach (var roleId in guildUser.RoleIds)
+        {
+            if (guild.Roles.TryGetValue(roleId, out var role))
+                resolved |= (ulong)role.Permissions;
+        }
+        return resolved;
+    }
+}

src/GmRelay.DiscordBot/Features/Sessions/DiscordRescheduleHandler.cs

@@ -0,0 +1,155 @@
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+using Dapper;
+using GmRelay.DiscordBot.Infrastructure.Discord;
+using GmRelay.DiscordBot.Rendering;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Sessions.RescheduleSession;
+using GmRelay.Shared.Platform;
+using NetCord;
+using NetCord.Rest;
+using Npgsql;
+
+public sealed record DiscordRescheduleResult(Guid ProposalId, IReadOnlyList<RescheduleOptionDto> Options, DateTimeOffset Deadline);
+
+public sealed class DiscordRescheduleHandler(
+    NpgsqlDataSource dataSource,
+    DiscordPermissionChecker permissionChecker,
+    RestClient restClient,
+    ILogger<DiscordRescheduleHandler> logger)
+{
+    public async Task<DiscordRescheduleResult> HandleAsync(
+        string guildId,
+        string channelId,
+        ulong userId,
+        string userDisplayName,
+        ulong resolvedPermissions,
+        ulong guildOwnerId,
+        Guid sessionId,
+        IReadOnlyList<DateTimeOffset> options,
+        DateTimeOffset deadline,
+        CancellationToken ct)
+    {
+        // 1. Permission check + read-only validation (before Discord message)
+        await using var readConnection = await dataSource.OpenConnectionAsync(ct);
+
+        var dbManagerUserIds = await readConnection.QueryAsync<ulong>(
+            @"SELECT CAST(p.external_user_id AS BIGINT)
+              FROM group_managers gm
+              JOIN players p ON p.id = gm.player_id
+              JOIN game_groups g ON g.id = gm.group_id
+              WHERE g.platform = 'Discord' AND g.external_group_id = @GuildId",
+            new { GuildId = guildId });
+
+        if (!permissionChecker.CanManageSchedule(guildOwnerId, userId, dbManagerUserIds, resolvedPermissions))
+        {
+            throw new UnauthorizedAccessException("⛔ Только owner, администратор или manager могут переносить сессии.");
+        }
+
+        // 2. Ensure player exists
+        await readConnection.ExecuteAsync(
+            @"INSERT INTO players (display_name, platform, external_user_id, external_username)
+              VALUES (@Name, 'Discord', @UserId, @Name)
+              ON CONFLICT (platform, external_user_id)
+              WHERE platform IS NOT NULL AND external_user_id IS NOT NULL
+              DO UPDATE SET display_name = EXCLUDED.display_name",
+            new { Name = userDisplayName, UserId = userId.ToString() });
+
+        // 3. Verify session exists
+        var session = await readConnection.QuerySingleOrDefaultAsync<RescheduleSessionInfoDto>(
+            """
+            SELECT s.title AS Title, s.scheduled_at AS CurrentScheduledAt
+            FROM sessions s
+            WHERE s.id = @SessionId AND s.status != @Cancelled
+            """,
+            new { SessionId = sessionId, Cancelled = SessionStatus.Cancelled });
+
+        if (session is null)
+            throw new InvalidOperationException("Сессия не найдена или отменена.");
+
+        // 4. Check no active proposal
+        var hasActive = await readConnection.ExecuteScalarAsync<bool>(
+            "SELECT EXISTS (SELECT 1 FROM reschedule_proposals WHERE session_id = @SessionId AND status IN ('AwaitingTime', 'Voting'))",
+            new { SessionId = sessionId });
+
+        if (hasActive)
+            throw new InvalidOperationException("Уже есть активный запрос на перенос этой сессии.");
+
+        // 5. Load participants for rendering
+        var participants = (await readConnection.QueryAsync<VoteParticipantDto>(
+            """
+            SELECT p.id AS PlayerId, p.display_name AS DisplayName, p.external_username AS TelegramUsername, 0 AS TelegramId
+            FROM session_participants sp
+            JOIN players p ON p.id = sp.player_id
+            WHERE sp.session_id = @SessionId AND sp.is_gm = false AND sp.registration_status = @Active
+            """,
+            new { SessionId = sessionId, Active = ParticipantRegistrationStatus.Active })).ToList();
+
+        // 6. Prepare proposal data
+        var proposalId = Guid.NewGuid();
+        var optionDtos = options.Select((o, i) => new RescheduleOptionDto(Guid.NewGuid(), i + 1, o)).ToList();
+
+        // 7. Build and send Discord vote message BEFORE transaction
+        var (embed, actionRow) = DiscordRescheduleVotingRenderer.Render(session.Title, session.CurrentScheduledAt, deadline, optionDtos, participants, []);
+
+        var channelIdUlong = ulong.Parse(channelId);
+
+        // NOTE: Discord message is sent before DB transaction to avoid orphaned proposals
+        // if the send fails. There is a negligible race window where the message is visible
+        // before the DB commit; in practice users cannot click faster than the transaction commits.
+        var sentMessage = await restClient.SendMessageAsync(
+            channelIdUlong,
+            new MessageProperties()
+                .WithEmbeds(new[] { embed })
+                .WithComponents(new[] { actionRow }));
+
+        // 8. Create proposal + options + platform_messages in transaction
+        try
+        {
+            await using var connection = await dataSource.OpenConnectionAsync(ct);
+            await using var transaction = await connection.BeginTransactionAsync(ct);
+
+            await connection.ExecuteAsync(
+                """
+                INSERT INTO reschedule_proposals (id, session_id, proposed_by, source_platform, proposed_by_external_user_id, status, voting_deadline_at)
+                VALUES (@Id, @SessionId, NULL, 'Discord', @ProposedBy, 'Voting', @Deadline)
+                """,
+                new { Id = proposalId, SessionId = sessionId, ProposedBy = userId.ToString(), Deadline = deadline.UtcDateTime },
+                transaction);
+
+            foreach (var option in optionDtos)
+            {
+                await connection.ExecuteAsync(
+                    """
+                    INSERT INTO reschedule_options (id, proposal_id, proposed_at, display_order)
+                    VALUES (@OptionId, @ProposalId, @ProposedAt, @DisplayOrder)
+                    """,
+                    new { option.OptionId, ProposalId = proposalId, option.ProposedAt, option.DisplayOrder },
+                    transaction);
+            }
+
+            await connection.ExecuteAsync(
+                """
+                INSERT INTO platform_messages (platform, group_id, session_id, external_channel_id, external_message_id, purpose)
+                VALUES ('Discord', (SELECT id FROM game_groups WHERE platform = 'Discord' AND external_group_id = @GuildId), @SessionId, @ChannelId, @MessageId, 'reschedule_vote')
+                """,
+                new { GuildId = guildId, SessionId = sessionId, ChannelId = channelId, MessageId = sentMessage.Id.ToString() },
+                transaction);
+
+            await transaction.CommitAsync(ct);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Transaction failed after Discord message sent; deleting orphaned message");
+            try { await restClient.DeleteMessageAsync(channelIdUlong, sentMessage.Id); } catch { /* best effort */ }
+            throw;
+        }
+
+        logger.LogInformation("Discord reschedule voting started for session {SessionId}, proposal {ProposalId}", sessionId, proposalId);
+
+        return new DiscordRescheduleResult(proposalId, optionDtos, deadline);
+    }
+
+}
+
+internal sealed record RescheduleSessionInfoDto(string Title, DateTime CurrentScheduledAt);

src/GmRelay.DiscordBot/Features/Sessions/DiscordRescheduleVoteHandler.cs

@@ -0,0 +1,131 @@
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+using Dapper;
+using GmRelay.DiscordBot.Rendering;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Sessions.RescheduleSession;
+using GmRelay.Shared.Platform;
+using Npgsql;
+using NetCord.Rest;
+
+public sealed record DiscordRescheduleVoteInput(
+    Guid OptionId, ulong UserId, string InteractionId,
+    string GuildId, string ChannelId, string MessageId);
+
+public sealed class DiscordRescheduleVoteHandler(
+    NpgsqlDataSource dataSource,
+    RestClient restClient,
+    ILogger<DiscordRescheduleVoteHandler> logger)
+{
+    public async Task<string> HandleAsync(DiscordRescheduleVoteInput input, CancellationToken ct)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+        await using var transaction = await connection.BeginTransactionAsync(ct);
+
+        // 1. Load proposal + option
+        var proposal = await connection.QuerySingleOrDefaultAsync<VoteProposalDto>(
+            """
+            SELECT rp.id AS Id, rp.session_id AS SessionId, rp.voting_deadline_at AS VotingDeadlineAt,
+                   s.title AS Title, s.scheduled_at AS CurrentScheduledAt
+            FROM reschedule_options ro
+            JOIN reschedule_proposals rp ON rp.id = ro.proposal_id
+            JOIN sessions s ON s.id = rp.session_id
+            WHERE ro.id = @OptionId AND rp.status = 'Voting'
+            """,
+            new { input.OptionId },
+            transaction);
+
+        if (proposal is null)
+            return "Голосование уже завершено или не найдено.";
+
+        if (proposal.VotingDeadlineAt <= DateTimeOffset.UtcNow)
+            return "Дедлайн уже прошёл. Результаты скоро будут применены.";
+
+        // 2. Verify participant (Discord platform)
+        var playerId = await connection.ExecuteScalarAsync<Guid?>(
+            """
+            SELECT p.id
+            FROM session_participants sp
+            JOIN players p ON p.id = sp.player_id
+            WHERE sp.session_id = @SessionId
+              AND p.platform = 'Discord'
+              AND p.external_user_id = @UserId
+              AND sp.is_gm = false
+              AND sp.registration_status = @Active
+            """,
+            new { proposal.SessionId, UserId = input.UserId.ToString(), Active = ParticipantRegistrationStatus.Active },
+            transaction);
+
+        if (playerId is null)
+            return "Вы не являетесь участником этой сессии.";
+
+        // 3. Upsert vote
+        await connection.ExecuteAsync(
+            """
+            INSERT INTO reschedule_option_votes (proposal_id, player_id, option_id)
+            VALUES (@ProposalId, @PlayerId, @OptionId)
+            ON CONFLICT (proposal_id, player_id) DO UPDATE
+            SET option_id = EXCLUDED.option_id, voted_at = now()
+            """,
+            new { ProposalId = proposal.Id, PlayerId = playerId.Value, input.OptionId },
+            transaction);
+
+        // 4. Reload participants, options, votes for re-rendering
+        var participants = (await connection.QueryAsync<VoteParticipantDto>(
+            """
+            SELECT p.id AS PlayerId, p.display_name AS DisplayName, p.external_username AS TelegramUsername, 0 AS TelegramId
+            FROM session_participants sp
+            JOIN players p ON p.id = sp.player_id
+            WHERE sp.session_id = @SessionId AND sp.is_gm = false AND sp.registration_status = @Active
+            ORDER BY p.display_name
+            """,
+            new { proposal.SessionId, Active = ParticipantRegistrationStatus.Active },
+            transaction)).ToList();
+
+        var options = (await connection.QueryAsync<RescheduleOptionDto>(
+            """
+            SELECT id AS OptionId, display_order AS DisplayOrder, proposed_at AS ProposedAt
+            FROM reschedule_options
+            WHERE proposal_id = @ProposalId
+            ORDER BY display_order
+            """,
+            new { ProposalId = proposal.Id },
+            transaction)).ToList();
+
+        var votes = (await connection.QueryAsync<RescheduleOptionVoteDto>(
+            """
+            SELECT rov.option_id AS OptionId, p.id AS PlayerId, p.display_name AS DisplayName, p.external_username AS TelegramUsername
+            FROM reschedule_option_votes rov
+            JOIN players p ON p.id = rov.player_id
+            WHERE rov.proposal_id = @ProposalId
+            ORDER BY rov.voted_at, p.display_name
+            """,
+            new { ProposalId = proposal.Id },
+            transaction)).ToList();
+
+        await transaction.CommitAsync(ct);
+
+        // 5. Re-render and update Discord vote message
+        var (embed, actionRow) = DiscordRescheduleVotingRenderer.Render(
+            proposal.Title, proposal.CurrentScheduledAt, proposal.VotingDeadlineAt,
+            options, participants, votes);
+
+        var channelIdUlong = ulong.Parse(input.ChannelId);
+        var messageIdUlong = ulong.Parse(input.MessageId);
+
+        try
+        {
+            await restClient.ModifyMessageAsync(channelIdUlong, messageIdUlong, options =>
+            {
+                options.Embeds = new[] { embed };
+                options.Components = new[] { actionRow };
+            });
+        }
+        catch (Exception ex)
+        {
+            logger.LogWarning(ex, "Failed to update Discord vote message for proposal {ProposalId}", proposal.Id);
+        }
+
+        return "Ваш голос учтён. До дедлайна его можно изменить.";
+    }
+}

src/GmRelay.DiscordBot/Features/Sessions/DiscordRescheduleVotingDeadlineService.cs

@@ -0,0 +1,196 @@
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+using Dapper;
+using GmRelay.Shared.Features.Sessions.RescheduleSession;
+using GmRelay.Shared.Platform;
+using GmRelay.Shared.Rendering;
+using Npgsql;
+
+public sealed class DiscordRescheduleVotingDeadlineService(
+    NpgsqlDataSource dataSource,
+    RescheduleVotingFinalizer finalizer,
+    IPlatformMessenger messenger,
+    ILogger<DiscordRescheduleVotingDeadlineService> logger) : BackgroundService
+{
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        try
+        {
+            await ProcessDueProposals(stoppingToken);
+            using var timer = new PeriodicTimer(TimeSpan.FromMinutes(1));
+            while (await timer.WaitForNextTickAsync(stoppingToken))
+            {
+                await ProcessDueProposals(stoppingToken);
+            }
+        }
+        catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
+        {
+        }
+    }
+
+    private async Task ProcessDueProposals(CancellationToken ct)
+    {
+        try
+        {
+            var proposalIds = await finalizer.GetDueProposalIdsAsync("Discord", ct);
+            foreach (var id in proposalIds)
+            {
+                await TryFinalizeAsync(id, ct);
+            }
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to process Discord reschedule proposals");
+        }
+    }
+
+    private async Task TryFinalizeAsync(Guid proposalId, CancellationToken ct)
+    {
+        try
+        {
+            var result = await finalizer.FinalizeAsync(proposalId, ct);
+            if (result is null)
+                return;
+
+            if (result.SourcePlatform != "Discord")
+                return;
+
+            await TryUpdateDiscordVoteMessage(result, ct);
+
+            if (result.SelectedOption is not null)
+            {
+                await TryUpdateBatchScheduleAsync(result, ct);
+            }
+
+            logger.LogInformation(
+                "Finalized Discord reschedule proposal {ProposalId} for session {SessionId} with outcome {Outcome}",
+                proposalId,
+                result.SessionId,
+                result.Decision.Outcome);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to finalize Discord proposal {ProposalId}", proposalId);
+        }
+    }
+
+    private async Task TryUpdateDiscordVoteMessage(RescheduleVotingFinalizerResult result, CancellationToken ct)
+    {
+        try
+        {
+            await using var connection = await dataSource.OpenConnectionAsync(ct);
+            var msgRef = await connection.QuerySingleOrDefaultAsync<PlatformMessageRefDto>(
+                """
+                SELECT g.external_group_id AS ExternalGroupId,
+                       COALESCE(pm.external_channel_id, g.external_channel_id, g.external_group_id) AS ExternalChannelId,
+                       pm.external_message_id AS ExternalMessageId
+                FROM platform_messages pm
+                JOIN game_groups g ON g.id = pm.group_id
+                WHERE pm.session_id = @SessionId AND pm.purpose = 'reschedule_vote' AND pm.platform = 'Discord'
+                ORDER BY pm.created_at DESC
+                LIMIT 1
+                """,
+                new { result.SessionId });
+
+            if (msgRef is null)
+                return;
+
+            var group = CreateDiscordGroup(msgRef);
+
+            await messenger.UpdateRescheduleVoteAsync(
+                new PlatformRescheduleVoteUpdate(
+                    group,
+                    new PlatformMessageRef(
+                        PlatformKind.Discord,
+                        msgRef.ExternalGroupId,
+                        null,
+                        msgRef.ExternalMessageId),
+                    result.ProposalId,
+                    result.SessionId,
+                    result.Title,
+                    result.CurrentScheduledAt,
+                    result.VotingDeadlineAt,
+                    result.Decision,
+                    result.SelectedOption,
+                    result.Options,
+                    result.Votes,
+                    result.Participants),
+                ct);
+        }
+        catch (Exception ex)
+        {
+            logger.LogWarning(ex, "Failed to update Discord vote message for session {SessionId}", result.SessionId);
+        }
+    }
+
+    private async Task TryUpdateBatchScheduleAsync(RescheduleVotingFinalizerResult result, CancellationToken ct)
+    {
+        try
+        {
+            await using var connection = await dataSource.OpenConnectionAsync(ct);
+            var batchRef = await connection.QuerySingleOrDefaultAsync<PlatformMessageRefDto>(
+                """
+                SELECT g.external_group_id AS ExternalGroupId,
+                       COALESCE(pm.external_channel_id, g.external_channel_id, g.external_group_id) AS ExternalChannelId,
+                       pm.external_message_id AS ExternalMessageId
+                FROM platform_messages pm
+                JOIN game_groups g ON g.id = pm.group_id
+                WHERE pm.batch_id = @BatchId AND pm.purpose = 'schedule' AND pm.platform = 'Discord'
+                ORDER BY pm.created_at DESC
+                LIMIT 1
+                """,
+                new { result.BatchId });
+
+            if (batchRef is null)
+                return;
+
+            var sessions = (await connection.QueryAsync<SessionBatchDto>(
+                "SELECT id AS SessionId, scheduled_at AS ScheduledAt, status AS Status, max_players AS MaxPlayers, join_link AS JoinLink FROM sessions WHERE batch_id = @BatchId ORDER BY scheduled_at",
+                new { result.BatchId })).ToList();
+
+            var participants = (await connection.QueryAsync<ParticipantBatchDto>(
+                """
+                SELECT sp.session_id AS SessionId,
+                       p.display_name AS DisplayName,
+                       COALESCE(p.external_username, p.telegram_username) AS TelegramUsername,
+                       sp.registration_status AS RegistrationStatus
+                FROM session_participants sp
+                JOIN players p ON p.id = sp.player_id
+                JOIN sessions s ON sp.session_id = s.id
+                WHERE s.batch_id = @BatchId AND sp.is_gm = false
+                ORDER BY sp.registration_status ASC, sp.created_at ASC
+                """,
+                new { result.BatchId })).ToList();
+
+            var view = SessionBatchViewBuilder.Build(result.Title, sessions, participants);
+            var group = CreateDiscordGroup(batchRef);
+
+            await messenger.UpdateScheduleAsync(
+                new PlatformScheduleMessage(
+                    group,
+                    view,
+                    new PlatformMessageRef(
+                        PlatformKind.Discord,
+                        batchRef.ExternalGroupId,
+                        null,
+                        batchRef.ExternalMessageId)),
+                ct);
+        }
+        catch (Exception ex)
+        {
+            logger.LogWarning(ex, "Failed to update Discord batch schedule for session {SessionId}", result.SessionId);
+        }
+    }
+
+    private static PlatformGroup CreateDiscordGroup(PlatformMessageRefDto message) =>
+        new(
+            PlatformKind.Discord,
+            message.ExternalGroupId,
+            message.ExternalGroupId,
+            message.ExternalChannelId);
+
+    internal sealed record PlatformMessageRefDto(
+        string ExternalGroupId,
+        string ExternalChannelId,
+        string ExternalMessageId);
+}

src/GmRelay.DiscordBot/Features/Sessions/DiscordSessionInteractionMapper.cs

@@ -0,0 +1,64 @@
+using GmRelay.Shared.Features.Sessions.CreateSession;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+public sealed record DiscordSessionInteractionInput(
+    Guid SessionId,
+    string InteractionId,
+    string GuildId,
+    string ChannelId,
+    string MessageId,
+    ulong UserId,
+    string Username,
+    string? DisplayName);
+
+public static class DiscordSessionInteractionMapper
+{
+    public static bool TryParseCustomId(string customId, string expectedAction, out Guid sessionId)
+    {
+        sessionId = default;
+
+        var parts = customId.Split(':', 2);
+        return parts.Length == 2
+            && string.Equals(parts[0], expectedAction, StringComparison.Ordinal)
+            && Guid.TryParse(parts[1], out sessionId);
+    }
+
+    public static JoinSessionCommand CreateJoinCommand(DiscordSessionInteractionInput input) =>
+        new(
+            SessionId: input.SessionId,
+            User: CreateUser(input),
+            InteractionId: input.InteractionId,
+            Group: CreateGroup(input),
+            ScheduleMessage: CreateMessageRef(input));
+
+    public static LeaveSessionCommand CreateLeaveCommand(DiscordSessionInteractionInput input) =>
+        new(
+            SessionId: input.SessionId,
+            User: CreateUser(input),
+            InteractionId: input.InteractionId,
+            Group: CreateGroup(input),
+            ScheduleMessage: CreateMessageRef(input));
+
+    private static PlatformUser CreateUser(DiscordSessionInteractionInput input) =>
+        new(
+            PlatformKind.Discord,
+            input.UserId.ToString(System.Globalization.CultureInfo.InvariantCulture),
+            string.IsNullOrWhiteSpace(input.DisplayName) ? input.Username : input.DisplayName,
+            input.Username);
+
+    private static PlatformGroup CreateGroup(DiscordSessionInteractionInput input) =>
+        new(
+            PlatformKind.Discord,
+            input.GuildId,
+            input.GuildId,
+            input.ChannelId);
+
+    private static PlatformMessageRef CreateMessageRef(DiscordSessionInteractionInput input) =>
+        new(
+            PlatformKind.Discord,
+            input.GuildId,
+            null,
+            input.MessageId);
+}

src/GmRelay.DiscordBot/Features/Sessions/DiscordSessionInteractionModule.cs

@@ -0,0 +1,201 @@
+using GmRelay.DiscordBot.Infrastructure.Discord;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Confirmation.HandleRsvp;
+using GmRelay.Shared.Features.Sessions.CreateSession;
+using GmRelay.Shared.Platform;
+using System.Globalization;
+using NetCord;
+using NetCord.Rest;
+using NetCord.Services.ComponentInteractions;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+public sealed class DiscordSessionInteractionModule(
+    JoinSessionHandler joinSessionHandler,
+    LeaveSessionHandler leaveSessionHandler,
+    HandleRsvpHandler rsvpHandler,
+    DiscordRescheduleVoteHandler voteHandler,
+    DiscordInteractionReplyCache interactionReplies,
+    ILogger<DiscordSessionInteractionModule> logger) : ComponentInteractionModule<ButtonInteractionContext>
+{
+    [ComponentInteraction("join_session")]
+    public async Task JoinAsync(string sessionId)
+    {
+        if (!Guid.TryParse(sessionId, out var parsedSessionId))
+        {
+            await RespondAsync(CreateEphemeralReply("Session button is outdated."));
+            return;
+        }
+
+        var input = CreateInput(parsedSessionId);
+        await RespondAsync(InteractionCallback.DeferredMessage(MessageFlags.Ephemeral));
+        try
+        {
+            await joinSessionHandler.HandleAsync(
+                DiscordSessionInteractionMapper.CreateJoinCommand(input),
+                CancellationToken.None);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to handle Discord join interaction for session {SessionId}", parsedSessionId);
+            await CompleteResponseAsync("Не удалось обработать кнопку.");
+            return;
+        }
+
+        await CompleteWithStoredReplyAsync(input.InteractionId);
+    }
+
+    [ComponentInteraction("leave_session")]
+    public async Task LeaveAsync(string sessionId)
+    {
+        if (!Guid.TryParse(sessionId, out var parsedSessionId))
+        {
+            await RespondAsync(CreateEphemeralReply("Session button is outdated."));
+            return;
+        }
+
+        var input = CreateInput(parsedSessionId);
+        await RespondAsync(InteractionCallback.DeferredMessage(MessageFlags.Ephemeral));
+        try
+        {
+            await leaveSessionHandler.HandleAsync(
+                DiscordSessionInteractionMapper.CreateLeaveCommand(input),
+                CancellationToken.None);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to handle Discord leave interaction for session {SessionId}", parsedSessionId);
+            await CompleteResponseAsync("Не удалось обработать кнопку.");
+            return;
+        }
+
+        await CompleteWithStoredReplyAsync(input.InteractionId);
+    }
+
+    [ComponentInteraction("rsvp")]
+    public async Task RsvpAsync(string status, string sessionId)
+    {
+        if (!Guid.TryParse(sessionId, out var parsedSessionId))
+        {
+            await RespondAsync(CreateEphemeralReply("Session button is outdated."));
+            return;
+        }
+
+        var rsvpStatus = status switch
+        {
+            "confirm" => RsvpStatus.Confirmed,
+            "decline" => RsvpStatus.Declined,
+            _ => null
+        };
+
+        if (rsvpStatus is null)
+        {
+            await RespondAsync(CreateEphemeralReply("Session button is outdated."));
+            return;
+        }
+
+        var input = CreateInput(parsedSessionId);
+        await RespondAsync(InteractionCallback.DeferredMessage(MessageFlags.Ephemeral));
+
+        try
+        {
+            await rsvpHandler.HandleAsync(
+                new HandleRsvpCommand(
+                    parsedSessionId,
+                    new PlatformUser(
+                        PlatformKind.Discord,
+                        Context.User.Id.ToString(CultureInfo.InvariantCulture),
+                        string.IsNullOrWhiteSpace(Context.User.GlobalName) ? Context.User.Username : Context.User.GlobalName,
+                        Context.User.Username),
+                    rsvpStatus,
+                    input.InteractionId,
+                    new PlatformGroup(
+                        PlatformKind.Discord,
+                        input.GuildId,
+                        input.GuildId,
+                        input.ChannelId),
+                    new PlatformMessageRef(
+                        PlatformKind.Discord,
+                        input.GuildId,
+                        null,
+                        input.MessageId)),
+                CancellationToken.None);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to handle Discord RSVP interaction for session {SessionId}", parsedSessionId);
+            await CompleteResponseAsync("Не удалось обработать кнопку.");
+            return;
+        }
+
+        await CompleteWithStoredReplyAsync(input.InteractionId);
+    }
+
+    [ComponentInteraction("reschedule_vote")]
+    public async Task RescheduleVoteAsync(string optionId)
+    {
+        if (!Guid.TryParse(optionId, out var parsedOptionId))
+        {
+            await RespondAsync(CreateEphemeralReply("Vote button is outdated."));
+            return;
+        }
+
+        var input = CreateInput(Guid.Empty); // sessionId not needed for vote routing
+        var voteInput = new DiscordRescheduleVoteInput(
+            parsedOptionId,
+            Context.User.Id,
+            Context.Interaction.Id.ToString(System.Globalization.CultureInfo.InvariantCulture),
+            input.GuildId,
+            input.ChannelId,
+            input.MessageId);
+
+        await RespondAsync(InteractionCallback.DeferredMessage(MessageFlags.Ephemeral));
+
+        string replyText;
+        try
+        {
+            replyText = await voteHandler.HandleAsync(voteInput, CancellationToken.None);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to handle Discord reschedule vote for option {OptionId}", parsedOptionId);
+            await CompleteResponseAsync("Не удалось обработать голос.");
+            return;
+        }
+
+        await CompleteResponseAsync(replyText);
+    }
+
+    private DiscordSessionInteractionInput CreateInput(Guid sessionId)
+    {
+        var guild = Context.Guild
+            ?? throw new InvalidOperationException("Session buttons can only be used in a guild.");
+        var message = Context.Interaction.Message
+            ?? throw new InvalidOperationException("Session button interaction must include a message.");
+
+        return new DiscordSessionInteractionInput(
+            SessionId: sessionId,
+            InteractionId: Context.Interaction.Id.ToString(System.Globalization.CultureInfo.InvariantCulture),
+            GuildId: guild.Id.ToString(CultureInfo.InvariantCulture),
+            ChannelId: Context.Channel.Id.ToString(CultureInfo.InvariantCulture),
+            MessageId: message.Id.ToString(CultureInfo.InvariantCulture),
+            UserId: Context.User.Id,
+            Username: Context.User.Username,
+            DisplayName: Context.User.GlobalName);
+    }
+
+    private async Task CompleteWithStoredReplyAsync(string interactionId)
+    {
+        var reply = interactionReplies.Take(interactionId);
+        await CompleteResponseAsync(reply?.Text ?? "Session updated.");
+    }
+
+    private Task CompleteResponseAsync(string text) =>
+        ModifyResponseAsync(options => options.Content = text);
+
+    private static InteractionCallbackProperties CreateEphemeralReply(string text) =>
+        InteractionCallback.Message(
+            new InteractionMessageProperties()
+                .WithContent(text)
+                .WithFlags(MessageFlags.Ephemeral));
+}

src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordInteractionReplyCache.cs

@@ -0,0 +1,17 @@
+using System.Collections.Concurrent;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.DiscordBot.Infrastructure.Discord;
+
+public sealed class DiscordInteractionReplyCache
+{
+    private readonly ConcurrentDictionary<string, PlatformInteractionReply> replies = new(StringComparer.Ordinal);
+
+    public void Store(PlatformInteractionReply reply) =>
+        replies[reply.InteractionId] = reply;
+
+    public PlatformInteractionReply? Take(string interactionId) =>
+        replies.TryRemove(interactionId, out var reply)
+            ? reply
+            : null;
+}

src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs

@@ -1,19 +1,43 @@
+using System.Globalization;
+using System.Text;
 using GmRelay.DiscordBot.Rendering;
+using GmRelay.Shared.Domain;
 using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
+using Microsoft.Extensions.Logging;
 using NetCord;
 using NetCord.Rest;
 
 namespace GmRelay.DiscordBot.Infrastructure.Discord;
 
-public sealed class DiscordPlatformMessenger(RestClient restClient) : IPlatformMessenger
+public sealed class DiscordPlatformMessenger : IPlatformMessenger
 {
+    private readonly RestClient restClient;
+    private readonly DiscordInteractionReplyCache interactionReplies;
+    private readonly ILogger<DiscordPlatformMessenger>? logger;
+
+    public DiscordPlatformMessenger(
+        RestClient restClient,
+        DiscordInteractionReplyCache interactionReplies)
+        : this(restClient, interactionReplies, logger: null)
+    {
+    }
+
+    public DiscordPlatformMessenger(
+        RestClient restClient,
+        DiscordInteractionReplyCache interactionReplies,
+        ILogger<DiscordPlatformMessenger>? logger)
+    {
+        this.restClient = restClient;
+        this.interactionReplies = interactionReplies;
+        this.logger = logger;
+    }
+
     public async Task<PlatformMessageRef> SendScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
     {
         var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(message.View);
 
-        var channelId = ulong.Parse(message.Group.ExternalChannelId
+        var channelId = GetChannelId(message.Group);
-            ?? message.Group.ExternalGroupId);
 
         var msg = await restClient.SendMessageAsync(
             channelId,
@@ -25,7 +49,7 @@ public sealed class DiscordPlatformMessenger(RestClient restClient) : IPlatformM
             PlatformKind.Discord,
             message.Group.ExternalGroupId,
             null,
-            msg.Id.ToString());
+            msg.Id.ToString(CultureInfo.InvariantCulture));
     }
 
     public async Task UpdateScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
@@ -35,9 +59,8 @@ public sealed class DiscordPlatformMessenger(RestClient restClient) : IPlatformM
 
         var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(message.View);
 
-        var channelId = ulong.Parse(message.Group.ExternalChannelId
+        var channelId = GetChannelId(message.Group);
-            ?? message.Group.ExternalGroupId);
+        var messageId = ParseSnowflake(message.ExistingMessage.ExternalMessageId);
-        var messageId = ulong.Parse(message.ExistingMessage.ExternalMessageId);
 
         await restClient.ModifyMessageAsync(
             channelId,
@@ -49,18 +72,19 @@ public sealed class DiscordPlatformMessenger(RestClient restClient) : IPlatformM
             });
     }
 
-    public Task SendGroupMessageAsync(PlatformGroup group, string htmlText, CancellationToken ct)
+    public async Task SendGroupMessageAsync(PlatformGroup group, string htmlText, CancellationToken ct)
     {
-        return Task.CompletedTask;
+        await restClient.SendMessageAsync(GetChannelId(group), htmlText);
     }
 
-    public Task SendPrivateMessageAsync(PlatformPrivateMessage message, CancellationToken ct)
+    public async Task SendPrivateMessageAsync(PlatformPrivateMessage message, CancellationToken ct)
     {
-        return Task.CompletedTask;
+        await SendDirectContentAsync(message.Recipient, message.HtmlText, ct);
     }
 
     public Task AnswerInteractionAsync(PlatformInteractionReply reply, CancellationToken ct)
     {
+        interactionReplies.Store(reply);
         return Task.CompletedTask;
     }
 
@@ -68,4 +92,281 @@ public sealed class DiscordPlatformMessenger(RestClient restClient) : IPlatformM
     {
         return Task.CompletedTask;
     }
+
+    public async Task<PlatformMessageRef> SendConfirmationRequestAsync(
+        PlatformConfirmationRequest request,
+        CancellationToken ct)
+    {
+        var channelId = GetChannelId(request.Group);
+        var message = await restClient.SendMessageAsync(
+            channelId,
+            new MessageProperties()
+                .WithEmbeds([BuildConfirmationEmbed(request)])
+                .WithComponents(BuildRsvpRows(request.SessionId, disabled: false)));
+
+        return new PlatformMessageRef(
+            PlatformKind.Discord,
+            request.Group.ExternalGroupId,
+            null,
+            message.Id.ToString(CultureInfo.InvariantCulture));
+    }
+
+    public async Task UpdateConfirmationRequestAsync(PlatformRsvpMessageUpdate update, CancellationToken ct)
+    {
+        if (update.Request.ExistingMessage is null)
+            return;
+
+        var channelId = GetChannelId(update.Request.Group);
+        var messageId = ParseSnowflake(update.Request.ExistingMessage.ExternalMessageId);
+        var components = BuildRsvpRows(update.Request.SessionId, update.DisableActions);
+
+        await restClient.ModifyMessageAsync(
+            channelId,
+            messageId,
+            options =>
+            {
+                options.Embeds = [BuildConfirmationEmbed(update.Request)];
+                options.Components = components;
+            });
+    }
+
+    public async Task<PlatformMessageRef> SendJoinLinkNotificationAsync(
+        PlatformJoinLinkNotification notification,
+        CancellationToken ct)
+    {
+        var channelId = GetChannelId(notification.Group);
+        var message = await restClient.SendMessageAsync(
+            channelId,
+            new MessageProperties().WithEmbeds([BuildJoinLinkEmbed(notification)]));
+
+        return new PlatformMessageRef(
+            PlatformKind.Discord,
+            notification.Group.ExternalGroupId,
+            null,
+            message.Id.ToString(CultureInfo.InvariantCulture));
+    }
+
+    public async Task SendDirectSessionNotificationAsync(
+        PlatformDirectSessionNotification notification,
+        CancellationToken ct)
+    {
+        try
+        {
+            await SendDirectContentAsync(
+                notification.Recipient,
+                BuildDirectContent(notification),
+                ct);
+        }
+        catch (Exception ex)
+        {
+            logger?.LogWarning(
+                ex,
+                "Failed to send Discord direct notification {NotificationKind} for session {SessionId} to user {ExternalUserId}",
+                notification.Kind,
+                notification.SessionId,
+                notification.Recipient.ExternalUserId);
+        }
+    }
+
+    public async Task SendRsvpOutcomeAsync(PlatformRsvpOutcomeNotification notification, CancellationToken ct)
+    {
+        if (notification.Kind == PlatformRsvpOutcomeKind.GroupAllConfirmed && notification.Group is not null)
+        {
+            await restClient.SendMessageAsync(
+                GetChannelId(notification.Group),
+                BuildRsvpGroupOutcomeContent(notification));
+            return;
+        }
+
+        var directKind = notification.Kind == PlatformRsvpOutcomeKind.GmPlayerDeclined
+            ? PlatformDirectSessionNotificationKind.RsvpDeclined
+            : PlatformDirectSessionNotificationKind.RsvpAllConfirmed;
+
+        foreach (var recipient in notification.Recipients)
+        {
+            await SendDirectSessionNotificationAsync(
+                new PlatformDirectSessionNotification(
+                    directKind,
+                    recipient,
+                    notification.SessionId,
+                    notification.Title,
+                    notification.ScheduledAt,
+                    ActorDisplayName: notification.ActorDisplayName),
+                ct);
+        }
+    }
+
+    public async Task UpdateRescheduleVoteAsync(PlatformRescheduleVoteUpdate update, CancellationToken ct)
+    {
+        var (embed, actionRow) = DiscordRescheduleVotingRenderer.Render(
+            update.Title,
+            update.CurrentScheduledAt,
+            update.VotingDeadlineAt,
+            update.Options,
+            update.Participants,
+            update.Votes);
+
+        var disabledRow = new ActionRowProperties();
+        foreach (var button in actionRow.OfType<ButtonProperties>())
+        {
+            disabledRow.Add(new ButtonProperties(
+                button.CustomId,
+                button.Label ?? string.Empty,
+                ButtonStyle.Secondary)
+            {
+                Disabled = true
+            });
+        }
+
+        var updatedEmbed = embed.WithDescription(
+            $"{embed.Description}\n\n{BuildRescheduleResultText(update)}");
+
+        await restClient.ModifyMessageAsync(
+            GetChannelId(update.Group),
+            ParseSnowflake(update.ExistingMessage.ExternalMessageId),
+            options =>
+            {
+                options.Embeds = [updatedEmbed];
+                options.Components = [disabledRow];
+            });
+    }
+
+    private static EmbedProperties BuildConfirmationEmbed(PlatformConfirmationRequest request)
+    {
+        var embed = new EmbedProperties()
+            .WithTitle($"Подтверждение: {request.Title}")
+            .WithDescription(BuildConfirmationDescription(request))
+            .WithColor(new Color(0x5865F2));
+
+        return embed.AddFields(
+        [
+            BuildParticipantField("Подтвердили", request.Participants, RsvpStatus.Confirmed),
+            BuildParticipantField("Отказались", request.Participants, RsvpStatus.Declined),
+            BuildParticipantField("Ожидаем ответ", request.Participants, RsvpStatus.Pending)
+        ]);
+    }
+
+    private static string BuildConfirmationDescription(PlatformConfirmationRequest request) =>
+        $"Время: **{request.ScheduledAt.FormatMoscow()}** (МСК)\n" +
+        "Подтвердите участие кнопкой ниже.";
+
+    private static EmbedFieldProperties BuildParticipantField(
+        string title,
+        IReadOnlyList<PlatformSessionParticipant> participants,
+        string status)
+    {
+        var values = participants
+            .Where(participant => participant.RsvpStatus == status)
+            .Select(FormatDiscordParticipant)
+            .ToList();
+
+        return new EmbedFieldProperties()
+            .WithName(title)
+            .WithValue(values.Count == 0 ? "—" : string.Join("\n", values))
+            .WithInline();
+    }
+
+    private static EmbedProperties BuildJoinLinkEmbed(PlatformJoinLinkNotification notification)
+    {
+        var mentions = notification.ConfirmedPlayers.Count == 0
+            ? "—"
+            : string.Join(", ", notification.ConfirmedPlayers.Select(p => Mention(p.User)));
+
+        return new EmbedProperties()
+            .WithTitle($"Ссылка на игру: {notification.Title}")
+            .WithDescription(
+                $"Время: **{notification.ScheduledAt.FormatMoscow()}** (МСК)\n" +
+                $"Ссылка: {notification.JoinLink}\n\n" +
+                $"Участники: {mentions}")
+            .WithUrl(notification.JoinLink)
+            .WithColor(new Color(0x57F287));
+    }
+
+    private static IReadOnlyList<ActionRowProperties> BuildRsvpRows(Guid sessionId, bool disabled)
+    {
+        var row = new ActionRowProperties();
+        row.Add(new ButtonProperties($"rsvp:confirm:{sessionId}", "Буду", ButtonStyle.Success)
+        {
+            Disabled = disabled
+        });
+        row.Add(new ButtonProperties($"rsvp:decline:{sessionId}", "Не смогу", ButtonStyle.Danger)
+        {
+            Disabled = disabled
+        });
+
+        return [row];
+    }
+
+    private static string BuildDirectContent(PlatformDirectSessionNotification notification)
+    {
+        var builder = new StringBuilder();
+        builder.AppendLine(notification.Kind switch
+        {
+            PlatformDirectSessionNotificationKind.ConfirmationRequest => "Нужно подтвердить участие",
+            PlatformDirectSessionNotificationKind.OneHourReminder => "Напоминание: сессия через час",
+            PlatformDirectSessionNotificationKind.JoinLink => "Ссылка на игру",
+            PlatformDirectSessionNotificationKind.RsvpAllConfirmed => "Все игроки подтвердили участие",
+            PlatformDirectSessionNotificationKind.RsvpDeclined => "Игрок отказался от участия",
+            PlatformDirectSessionNotificationKind.RescheduleApproved => "Сессия перенесена",
+            PlatformDirectSessionNotificationKind.RescheduleRejected => "Перенос сессии отклонен",
+            _ => "Уведомление по сессии"
+        });
+
+        builder.AppendLine();
+        builder.AppendLine($"**{notification.Title}**");
+        builder.AppendLine($"Время: **{notification.ScheduledAt.FormatMoscow()}** (МСК)");
+
+        if (!string.IsNullOrWhiteSpace(notification.JoinLink))
+            builder.AppendLine($"Ссылка: {notification.JoinLink}");
+
+        if (!string.IsNullOrWhiteSpace(notification.ActorDisplayName))
+            builder.AppendLine($"Игрок: {notification.ActorDisplayName}");
+
+        if (!string.IsNullOrWhiteSpace(notification.Reason))
+            builder.AppendLine($"Причина: {notification.Reason}");
+
+        return builder.ToString();
+    }
+
+    private static string BuildRsvpGroupOutcomeContent(PlatformRsvpOutcomeNotification notification) =>
+        $"Все участники подтвердили сессию **{notification.Title}** на " +
+        $"**{notification.ScheduledAt.FormatMoscow()}** (МСК).";
+
+    private static string BuildRescheduleResultText(PlatformRescheduleVoteUpdate update)
+    {
+        if (update.SelectedOption is not null)
+        {
+            return "Голосование завершено. " +
+                $"Победил вариант {update.SelectedOption.DisplayOrder}: " +
+                $"**{update.SelectedOption.ProposedAt.FormatMoscow()}** (МСК).";
+        }
+
+        return $"Голосование завершено. {update.Decision.Reason}";
+    }
+
+    private async Task SendDirectContentAsync(PlatformUser recipient, string content, CancellationToken ct)
+    {
+        var userId = ParseSnowflake(recipient.ExternalUserId);
+        var dm = await restClient.GetDMChannelAsync(userId, cancellationToken: ct);
+        await restClient.SendMessageAsync(
+            dm.Id,
+            new MessageProperties().WithContent(content),
+            cancellationToken: ct);
+    }
+
+    private static string FormatDiscordParticipant(PlatformSessionParticipant participant) =>
+        $"{Mention(participant.User)} ({participant.User.DisplayName})";
+
+    private static string Mention(PlatformUser user) => $"<@{user.ExternalUserId}>";
+
+    private static ulong GetChannelId(PlatformGroup group)
+    {
+        var channelId = group.ExternalChannelId ?? group.ExternalGroupId
+            ?? throw new InvalidOperationException("Discord group has no channel or group identifier.");
+
+        return ParseSnowflake(channelId);
+    }
+
+    private static ulong ParseSnowflake(string value) =>
+        ulong.Parse(value, CultureInfo.InvariantCulture);
 }

src/GmRelay.DiscordBot/Infrastructure/Health/DiscordHealthCheckHostedService.cs

@@ -0,0 +1,101 @@
+using System.Net;
+
+namespace GmRelay.DiscordBot.Infrastructure.Health;
+
+public sealed class DiscordHealthCheckHostedService : IHostedService
+{
+    private readonly ILogger<DiscordHealthCheckHostedService> _logger;
+    private readonly string _prefix;
+    private HttpListener? _listener;
+    private CancellationTokenSource? _cts;
+    private Task? _listenerTask;
+
+    public DiscordHealthCheckHostedService(
+        ILogger<DiscordHealthCheckHostedService> logger,
+        IConfiguration configuration)
+    {
+        _logger = logger;
+        _prefix = configuration.GetValue("HealthCheck:Prefix", "http://+:8082/")!;
+    }
+
+    public Task StartAsync(CancellationToken cancellationToken)
+    {
+        _cts = new CancellationTokenSource();
+        _listener = new HttpListener();
+        _listener.Prefixes.Add(_prefix);
+        _listener.Start();
+
+        _logger.LogInformation("Discord health check server started on {Prefix}", _prefix);
+
+        _listenerTask = Task.Run(async () => await ListenAsync(_cts.Token), cancellationToken);
+
+        return Task.CompletedTask;
+    }
+
+    public async Task StopAsync(CancellationToken cancellationToken)
+    {
+        _cts?.Cancel();
+        _listener?.Stop();
+
+        if (_listenerTask != null)
+        {
+            await Task.WhenAny(_listenerTask, Task.Delay(TimeSpan.FromSeconds(5), cancellationToken));
+        }
+
+        _listener?.Close();
+        _logger.LogInformation("Discord health check server stopped");
+    }
+
+    private async Task ListenAsync(CancellationToken cancellationToken)
+    {
+        while (_listener?.IsListening == true && !cancellationToken.IsCancellationRequested)
+        {
+            try
+            {
+                var context = await _listener.GetContextAsync();
+                _ = Task.Run(() => HandleRequestAsync(context), cancellationToken);
+            }
+            catch (HttpListenerException) when (cancellationToken.IsCancellationRequested)
+            {
+                break;
+            }
+            catch (ObjectDisposedException)
+            {
+                break;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Error in Discord health check listener");
+            }
+        }
+    }
+
+    private async Task HandleRequestAsync(HttpListenerContext context)
+    {
+        var response = context.Response;
+        try
+        {
+            var request = context.Request;
+
+            if (request.Url?.AbsolutePath == "/health")
+            {
+                response.StatusCode = (int)HttpStatusCode.OK;
+                response.ContentType = "application/json";
+                var body = "{\"status\":\"healthy\"}"u8.ToArray();
+                await response.OutputStream.WriteAsync(body);
+            }
+            else
+            {
+                response.StatusCode = (int)HttpStatusCode.NotFound;
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error handling Discord health check request");
+        }
+        finally
+        {
+            response.Close();
+        }
+    }
+}

src/GmRelay.DiscordBot/Infrastructure/SystemClock.cs

@@ -0,0 +1,6 @@
+namespace GmRelay.DiscordBot.Infrastructure;
+
+public sealed class SystemClock : GmRelay.Shared.Platform.ISystemClock
+{
+    public DateTimeOffset UtcNow => DateTimeOffset.UtcNow;
+}

src/GmRelay.DiscordBot/Program.cs

@@ -1,7 +1,17 @@
 using GmRelay.DiscordBot;
 using GmRelay.DiscordBot.Features.Sessions;
+using GmRelay.DiscordBot.Infrastructure;
 using GmRelay.DiscordBot.Infrastructure.Discord;
+using GmRelay.DiscordBot.Infrastructure.Health;
 using GmRelay.DiscordBot.Infrastructure.Logging;
+using GmRelay.Shared.Features.Confirmation.HandleRsvp;
+using GmRelay.Shared.Features.Confirmation.SendConfirmation;
+using GmRelay.Shared.Features.Notifications;
+using GmRelay.Shared.Features.Reminders.SendJoinLink;
+using GmRelay.Shared.Features.Reminders.SendOneHourReminder;
+using GmRelay.Shared.Features.Sessions.CreateSession;
+using GmRelay.Shared.Features.Sessions.RescheduleSession;
+using GmRelay.Shared.Infrastructure.Scheduling;
 using GmRelay.Shared.Platform;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
@@ -43,7 +53,28 @@ builder.Services.AddSingleton<NpgsqlDataSource>(sp =>
 builder.Services.AddSingleton<DiscordPermissionChecker>();
 builder.Services.AddSingleton<DiscordListSessionsHandler>();
 builder.Services.AddSingleton<DiscordNewSessionHandler>();
+builder.Services.AddSingleton<DiscordRescheduleHandler>();
+builder.Services.AddSingleton<DiscordRescheduleVoteHandler>();
+builder.Services.AddSingleton<IScheduleMessageUpdateLock, ScheduleMessageUpdateLock>();
+builder.Services.AddSingleton<JoinSessionHandler>();
+builder.Services.AddSingleton<LeaveSessionHandler>();
+builder.Services.AddSingleton<DiscordInteractionReplyCache>();
 builder.Services.AddSingleton<IPlatformMessenger, DiscordPlatformMessenger>();
+builder.Services.AddSingleton<ISystemClock, SystemClock>();
+builder.Services.AddSingleton(new PlatformSchedulerOptions(PlatformKind.Discord));
+builder.Services.AddSingleton<ISessionTriggerStore, DbSessionTriggerStore>();
+builder.Services.AddSingleton<PlatformDirectNotificationSender>();
+builder.Services.AddSingleton<SendConfirmationHandler>();
+builder.Services.AddSingleton<ISendConfirmationHandler>(sp => sp.GetRequiredService<SendConfirmationHandler>());
+builder.Services.AddSingleton<SendJoinLinkHandler>();
+builder.Services.AddSingleton<ISendJoinLinkHandler>(sp => sp.GetRequiredService<SendJoinLinkHandler>());
+builder.Services.AddSingleton<SendOneHourReminderHandler>();
+builder.Services.AddSingleton<ISendOneHourReminderHandler>(sp => sp.GetRequiredService<SendOneHourReminderHandler>());
+builder.Services.AddSingleton<HandleRsvpHandler>();
+builder.Services.AddSingleton<RescheduleVotingFinalizer>();
+builder.Services.AddHostedService<SessionSchedulerService>();
+builder.Services.AddHostedService<DiscordRescheduleVotingDeadlineService>();
+builder.Services.AddHostedService<DiscordHealthCheckHostedService>();
 
 builder.Services
     .AddDiscordGateway(options =>

src/GmRelay.DiscordBot/Rendering/DiscordRescheduleVotingRenderer.cs

@@ -0,0 +1,67 @@
+namespace GmRelay.DiscordBot.Rendering;
+
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Sessions.RescheduleSession;
+using NetCord;
+using NetCord.Rest;
+
+public static class DiscordRescheduleVotingRenderer
+{
+    public static (EmbedProperties Embed, ActionRowProperties ActionRow) Render(
+        string title,
+        DateTime currentTime,
+        DateTimeOffset deadline,
+        IReadOnlyList<RescheduleOptionDto> options,
+        IReadOnlyList<VoteParticipantDto> participants,
+        IReadOnlyList<RescheduleOptionVoteDto> votes)
+    {
+        var votesByOption = votes.GroupBy(v => v.OptionId).ToDictionary(g => g.Key, g => g.ToList());
+        var votedPlayerIds = votes.Select(v => v.PlayerId).ToHashSet();
+        var pending = participants.Where(p => !votedPlayerIds.Contains(p.PlayerId)).Select(p => p.DisplayName).ToList();
+
+        var sb = new System.Text.StringBuilder();
+        sb.AppendLine($"📅 Текущее время: {currentTime.FormatMoscow()} (МСК)");
+        sb.AppendLine($"⏳ Дедлайн: {deadline.FormatMoscow()} (МСК)");
+        sb.AppendLine();
+        sb.AppendLine("Выберите один из вариантов:");
+
+        foreach (var option in options.OrderBy(o => o.DisplayOrder))
+        {
+            var optionVotes = votesByOption.GetValueOrDefault(option.OptionId, []);
+            sb.AppendLine($"{option.DisplayOrder}. **{option.ProposedAt.FormatMoscow()}** (МСК) — {optionVotes.Count} голосов");
+            if (optionVotes.Count > 0)
+            {
+                sb.AppendLine($"   {string.Join(", ", optionVotes.Select(v => v.DisplayName))}");
+            }
+        }
+
+        if (pending.Count > 0)
+        {
+            sb.AppendLine();
+            sb.AppendLine($"Не проголосовали: {string.Join(", ", pending)}");
+        }
+
+        sb.AppendLine();
+        sb.AppendLine($"Голосов: {votedPlayerIds.Count}/{participants.Count}");
+        sb.AppendLine("Правило: побеждает вариант с большинством голосов к дедлайну; при ничьей перенос не применяется.");
+
+        var embed = new EmbedProperties()
+            .WithTitle($"🔄 Перенос сессии «{title}»")
+            .WithDescription(sb.ToString())
+            .WithColor(new Color(0xFEE75C));
+
+        var actionRow = new ActionRowProperties();
+        foreach (var option in options.OrderBy(o => o.DisplayOrder))
+        {
+            actionRow.Add(new ButtonProperties(
+                $"reschedule_vote:{option.OptionId}",
+                $"{option.DisplayOrder}. {FormatButtonTime(option.ProposedAt)}",
+                ButtonStyle.Primary));
+        }
+
+        return (embed, actionRow);
+    }
+
+    private static string FormatButtonTime(DateTimeOffset utc)
+        => utc.ToOffset(TimeSpan.FromHours(3)).ToString("dd.MM HH:mm", System.Globalization.CultureInfo.InvariantCulture);
+}

src/GmRelay.DiscordBot/packages.lock.json

@@ -666,7 +666,13 @@
         }
       },
       "gmrelay.shared": {
-        "type": "Project"
+        "type": "Project",
+        "dependencies": {
+          "Dapper": "[2.1.72, )",
+          "Microsoft.Extensions.Hosting.Abstractions": "[10.0.5, )",
+          "Microsoft.Extensions.Logging.Abstractions": "[10.0.5, )",
+          "Npgsql": "[10.0.2, )"
+        }
       }
     }
   }

src/GmRelay.Shared/DapperAotModule.cs

@@ -0,0 +1 @@
+[module: Dapper.DapperAot]

src/GmRelay.Shared/Features/Confirmation/HandleRsvp/HandleRsvpHandler.cs

@@ -0,0 +1,356 @@
+using System.Globalization;
+using Dapper;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Notifications;
+using GmRelay.Shared.Platform;
+using Microsoft.Extensions.Logging;
+using Npgsql;
+
+namespace GmRelay.Shared.Features.Confirmation.HandleRsvp;
+
+public sealed record HandleRsvpCommand(
+    Guid SessionId,
+    PlatformUser User,
+    string Status,
+    string InteractionId,
+    PlatformGroup Group,
+    PlatformMessageRef ConfirmationMessage);
+
+internal sealed record RsvpCounts(int Total, int Confirmed, int Declined);
+
+internal sealed record RsvpSessionContext(
+    Guid GroupId,
+    string Title,
+    DateTime ScheduledAt,
+    string Status);
+
+internal sealed record ParticipantRsvpRow(
+    string Platform,
+    string ExternalUserId,
+    string DisplayName,
+    string? ExternalUsername,
+    string RsvpStatus,
+    string RegistrationStatus,
+    bool IsGm);
+
+internal sealed record RsvpRecipientRow(
+    string Platform,
+    string ExternalUserId,
+    string DisplayName,
+    string? ExternalUsername);
+
+public sealed class HandleRsvpHandler(
+    NpgsqlDataSource dataSource,
+    IPlatformMessenger messenger,
+    ILogger<HandleRsvpHandler> logger)
+{
+    public async Task HandleAsync(HandleRsvpCommand command, CancellationToken ct)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+        await using var transaction = await connection.BeginTransactionAsync(ct);
+
+        var participantExists = await connection.ExecuteScalarAsync<bool>(
+            """
+            SELECT EXISTS (
+                SELECT 1
+                FROM session_participants sp
+                JOIN players p ON p.id = sp.player_id
+                WHERE sp.session_id = @SessionId
+                  AND COALESCE(p.platform, 'Telegram') = @Platform
+                  AND COALESCE(p.external_user_id, p.telegram_id::TEXT) = @ExternalUserId
+                  AND sp.is_gm = false
+                  AND sp.registration_status = @Active
+            )
+            """,
+            new
+            {
+                command.SessionId,
+                Platform = command.User.Platform.ToString(),
+                command.User.ExternalUserId,
+                Active = ParticipantRegistrationStatus.Active
+            },
+            transaction);
+
+        if (!participantExists)
+        {
+            await messenger.AnswerInteractionAsync(
+                new PlatformInteractionReply(
+                    command.InteractionId,
+                    "Вы не являетесь участником этой сессии."),
+                ct);
+            return;
+        }
+
+        var updated = await connection.ExecuteAsync(
+            """
+            UPDATE session_participants
+            SET    rsvp_status  = @Status,
+                   responded_at = now()
+            WHERE  session_id = @SessionId
+              AND  player_id = (
+                    SELECT id
+                    FROM players
+                    WHERE COALESCE(platform, 'Telegram') = @Platform
+                      AND COALESCE(external_user_id, telegram_id::TEXT) = @ExternalUserId
+                    LIMIT 1
+              )
+              AND  registration_status = @Active
+              AND  rsvp_status != @Status
+            """,
+            new
+            {
+                command.SessionId,
+                command.Status,
+                Platform = command.User.Platform.ToString(),
+                command.User.ExternalUserId,
+                Active = ParticipantRegistrationStatus.Active
+            },
+            transaction);
+
+        if (updated == 0)
+        {
+            var alreadyText = command.Status == RsvpStatus.Confirmed
+                ? "Вы уже подтвердили участие."
+                : "Вы уже отказались от участия.";
+
+            await messenger.AnswerInteractionAsync(
+                new PlatformInteractionReply(command.InteractionId, alreadyText),
+                ct);
+            return;
+        }
+
+        var session = await connection.QuerySingleAsync<RsvpSessionContext>(
+            """
+            SELECT s.group_id AS GroupId,
+                   s.title,
+                   s.scheduled_at AS ScheduledAt,
+                   s.status AS Status
+            FROM sessions s
+            WHERE s.id = @SessionId
+            """,
+            new { command.SessionId },
+            transaction);
+
+        if (command.Status == RsvpStatus.Declined)
+        {
+            var decision = RsvpFlowRules.Evaluate(
+                command.Status,
+                session.Status,
+                totalParticipants: 0,
+                confirmedParticipants: 0);
+
+            if (decision.ShouldRevertSessionToConfirmationSent)
+            {
+                await connection.ExecuteAsync(
+                    """
+                    UPDATE sessions
+                    SET    status = @ConfirmationSent, updated_at = now()
+                    WHERE  id = @SessionId AND status = @Confirmed
+                    """,
+                    new
+                    {
+                        command.SessionId,
+                        ConfirmationSent = SessionStatus.ConfirmationSent,
+                        Confirmed = SessionStatus.Confirmed
+                    },
+                    transaction);
+            }
+
+            var gmRecipients = (await GetGmRecipientsAsync(connection, session.GroupId, transaction))
+                .ToList();
+
+            await transaction.CommitAsync(ct);
+
+            if (gmRecipients.Count > 0)
+            {
+                await messenger.SendRsvpOutcomeAsync(
+                    new PlatformRsvpOutcomeNotification(
+                        PlatformRsvpOutcomeKind.GmPlayerDeclined,
+                        Group: null,
+                        gmRecipients,
+                        command.SessionId,
+                        session.Title,
+                        session.ScheduledAt,
+                        ActorDisplayName: command.User.DisplayName),
+                    ct);
+            }
+
+            await messenger.AnswerInteractionAsync(
+                new PlatformInteractionReply(command.InteractionId, decision.CallbackText),
+                ct);
+        }
+        else
+        {
+            var counts = await connection.QuerySingleAsync<RsvpCounts>(
+                """
+                SELECT
+                    count(*)                                         AS Total,
+                    count(*) FILTER (WHERE rsvp_status = @Confirmed) AS Confirmed,
+                    count(*) FILTER (WHERE rsvp_status = @Declined)  AS Declined
+                FROM session_participants
+                WHERE session_id = @SessionId AND is_gm = false
+                  AND registration_status = @Active
+                """,
+                new
+                {
+                    command.SessionId,
+                    Confirmed = RsvpStatus.Confirmed,
+                    Declined = RsvpStatus.Declined,
+                    Active = ParticipantRegistrationStatus.Active
+                },
+                transaction);
+
+            var decision = RsvpFlowRules.Evaluate(command.Status, session.Status, counts.Total, counts.Confirmed);
+
+            if (decision.ShouldMarkSessionConfirmed)
+            {
+                await connection.ExecuteAsync(
+                    """
+                    UPDATE sessions
+                    SET    status = @Confirmed, updated_at = now()
+                    WHERE  id = @SessionId
+                    """,
+                    new { command.SessionId, Confirmed = SessionStatus.Confirmed },
+                    transaction);
+            }
+
+            var gmRecipients = decision.ShouldNotifyGm
+                ? (await GetGmRecipientsAsync(connection, session.GroupId, transaction)).ToList()
+                : [];
+
+            await transaction.CommitAsync(ct);
+
+            if (decision.ShouldNotifyGroup)
+            {
+                await messenger.SendRsvpOutcomeAsync(
+                    new PlatformRsvpOutcomeNotification(
+                        PlatformRsvpOutcomeKind.GroupAllConfirmed,
+                        command.Group,
+                        [],
+                        command.SessionId,
+                        session.Title,
+                        session.ScheduledAt),
+                    ct);
+            }
+
+            if (decision.ShouldNotifyGm && gmRecipients.Count > 0)
+            {
+                await messenger.SendRsvpOutcomeAsync(
+                    new PlatformRsvpOutcomeNotification(
+                        PlatformRsvpOutcomeKind.GmAllConfirmed,
+                        Group: null,
+                        gmRecipients,
+                        command.SessionId,
+                        session.Title,
+                        session.ScheduledAt),
+                    ct);
+            }
+
+            await messenger.AnswerInteractionAsync(
+                new PlatformInteractionReply(command.InteractionId, decision.CallbackText),
+                ct);
+        }
+
+        await UpdateConfirmationMessage(command, session, ct);
+    }
+
+    private async Task UpdateConfirmationMessage(
+        HandleRsvpCommand command,
+        RsvpSessionContext session,
+        CancellationToken ct)
+    {
+        try
+        {
+            await using var connection = await dataSource.OpenConnectionAsync(ct);
+
+            var participants = (await connection.QueryAsync<ParticipantRsvpRow>(
+                """
+                SELECT COALESCE(p.platform, 'Telegram') AS Platform,
+                       COALESCE(p.external_user_id, p.telegram_id::TEXT) AS ExternalUserId,
+                       p.display_name AS DisplayName,
+                       COALESCE(p.external_username, p.telegram_username) AS ExternalUsername,
+                       sp.rsvp_status AS RsvpStatus,
+                       sp.registration_status AS RegistrationStatus,
+                       sp.is_gm AS IsGm
+                FROM session_participants sp
+                JOIN players p ON p.id = sp.player_id
+                WHERE sp.session_id = @SessionId
+                  AND sp.is_gm = false
+                  AND sp.registration_status = @Active
+                ORDER BY sp.responded_at NULLS LAST
+                """,
+                new { command.SessionId, Active = ParticipantRegistrationStatus.Active }))
+                .Select(ToParticipant)
+                .ToList();
+
+            var disableActions = participants.Count > 0 &&
+                participants.All(participant => participant.RsvpStatus == RsvpStatus.Confirmed);
+
+            await messenger.UpdateConfirmationRequestAsync(
+                new PlatformRsvpMessageUpdate(
+                    new PlatformConfirmationRequest(
+                        command.Group,
+                        command.SessionId,
+                        session.Title,
+                        session.ScheduledAt,
+                        participants,
+                        command.ConfirmationMessage),
+                    disableActions),
+                ct);
+        }
+        catch (Exception ex)
+        {
+            logger.LogWarning(ex, "Failed to update confirmation message for session {SessionId}", command.SessionId);
+        }
+    }
+
+    private static async Task<IEnumerable<PlatformUser>> GetGmRecipientsAsync(
+        NpgsqlConnection connection,
+        Guid groupId,
+        NpgsqlTransaction transaction)
+    {
+        var rows = await connection.QueryAsync<RsvpRecipientRow>(
+            """
+            SELECT DISTINCT
+                   COALESCE(p.platform, 'Telegram') AS Platform,
+                   COALESCE(p.external_user_id, p.telegram_id::TEXT) AS ExternalUserId,
+                   p.display_name AS DisplayName,
+                   COALESCE(p.external_username, p.telegram_username) AS ExternalUsername
+            FROM group_managers gm
+            JOIN players p ON p.id = gm.player_id
+            WHERE gm.group_id = @GroupId
+            UNION
+            SELECT DISTINCT
+                   COALESCE(p.platform, 'Telegram') AS Platform,
+                   COALESCE(p.external_user_id, p.telegram_id::TEXT) AS ExternalUserId,
+                   p.display_name AS DisplayName,
+                   COALESCE(p.external_username, p.telegram_username) AS ExternalUsername
+            FROM game_groups g
+            JOIN players p ON p.telegram_id = g.gm_telegram_id
+            WHERE g.id = @GroupId
+              AND g.gm_telegram_id IS NOT NULL
+            """,
+            new { GroupId = groupId },
+            transaction);
+
+        return rows.Select(row => new PlatformUser(
+            ParsePlatform(row.Platform),
+            row.ExternalUserId,
+            row.DisplayName,
+            row.ExternalUsername));
+    }
+
+    private static PlatformSessionParticipant ToParticipant(ParticipantRsvpRow row) =>
+        new(
+            new PlatformUser(
+                ParsePlatform(row.Platform),
+                row.ExternalUserId,
+                row.DisplayName,
+                row.ExternalUsername),
+            row.RsvpStatus,
+            row.RegistrationStatus,
+            row.IsGm);
+
+    private static PlatformKind ParsePlatform(string platform) =>
+        Enum.Parse<PlatformKind>(platform, ignoreCase: true);
+}

src/GmRelay.Shared/Features/Confirmation/HandleRsvp/RsvpFlowRules.cs

@@ -1,8 +1,8 @@
 using GmRelay.Shared.Domain;
 
-namespace GmRelay.Bot.Features.Confirmation.HandleRsvp;
+namespace GmRelay.Shared.Features.Confirmation.HandleRsvp;
 
-internal sealed record RsvpFlowDecision(
+public sealed record RsvpFlowDecision(
     string CallbackText,
     bool ShouldAlertGm,
     bool ShouldRevertSessionToConfirmationSent,
@@ -10,7 +10,7 @@ internal sealed record RsvpFlowDecision(
     bool ShouldNotifyGroup,
     bool ShouldNotifyGm);
 
-internal static class RsvpFlowRules
+public static class RsvpFlowRules
 {
     public static RsvpFlowDecision Evaluate(
         string requestedStatus,
@@ -21,7 +21,7 @@ internal static class RsvpFlowRules
         if (requestedStatus == RsvpStatus.Declined)
         {
             return new RsvpFlowDecision(
-                CallbackText: "\u0412\u044b \u043e\u0442\u043a\u0430\u0437\u0430\u043b\u0438\u0441\u044c \u043e\u0442 \u0443\u0447\u0430\u0441\u0442\u0438\u044f.",
+                CallbackText: "Вы отказались от участия.",
                 ShouldAlertGm: true,
                 ShouldRevertSessionToConfirmationSent: currentSessionStatus == SessionStatus.Confirmed,
                 ShouldMarkSessionConfirmed: false,
@@ -32,7 +32,7 @@ internal static class RsvpFlowRules
         var everyoneConfirmed = confirmedParticipants == totalParticipants;
 
         return new RsvpFlowDecision(
-            CallbackText: "\u0412\u044b \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0434\u0438\u043b\u0438 \u0443\u0447\u0430\u0441\u0442\u0438\u0435!",
+            CallbackText: "Вы подтвердили участие!",
             ShouldAlertGm: false,
             ShouldRevertSessionToConfirmationSent: false,
             ShouldMarkSessionConfirmed: everyoneConfirmed,

src/GmRelay.Shared/Features/Confirmation/SendConfirmation/ISendConfirmationHandler.cs

@@ -1,4 +1,4 @@
-namespace GmRelay.Bot.Features.Confirmation.SendConfirmation;
+namespace GmRelay.Shared.Features.Confirmation.SendConfirmation;
 
 public interface ISendConfirmationHandler
 {

src/GmRelay.Shared/Features/Confirmation/SendConfirmation/SendConfirmationHandler.cs

@@ -0,0 +1,217 @@
+using System.Globalization;
+using Dapper;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Notifications;
+using GmRelay.Shared.Platform;
+using Microsoft.Extensions.Logging;
+using Npgsql;
+
+namespace GmRelay.Shared.Features.Confirmation.SendConfirmation;
+
+internal sealed record ConfirmationSessionRow(
+    Guid Id,
+    string Title,
+    DateTime ScheduledAt,
+    Guid GroupId,
+    string Platform,
+    string ExternalGroupId,
+    string DisplayName,
+    string? ExternalChannelId,
+    int? ThreadId,
+    string NotificationMode);
+
+internal sealed record ConfirmationParticipantRow(
+    string Platform,
+    string ExternalUserId,
+    string DisplayName,
+    string? ExternalUsername,
+    string RsvpStatus,
+    string RegistrationStatus,
+    bool IsGm);
+
+public sealed class SendConfirmationHandler(
+    NpgsqlDataSource dataSource,
+    IPlatformMessenger messenger,
+    PlatformDirectNotificationSender directSender,
+    ILogger<SendConfirmationHandler> logger) : ISendConfirmationHandler
+{
+    public async Task HandleAsync(Guid sessionId, CancellationToken ct)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+
+        var session = await connection.QuerySingleOrDefaultAsync<ConfirmationSessionRow>(
+            """
+            SELECT s.id,
+                   s.title,
+                   s.scheduled_at AS ScheduledAt,
+                   s.group_id AS GroupId,
+                   COALESCE(g.platform, 'Telegram') AS Platform,
+                   COALESCE(g.external_group_id, g.telegram_chat_id::TEXT) AS ExternalGroupId,
+                   g.name AS DisplayName,
+                   COALESCE(g.external_channel_id, g.telegram_chat_id::TEXT) AS ExternalChannelId,
+                   s.thread_id AS ThreadId,
+                   s.notification_mode AS NotificationMode
+            FROM sessions s
+            JOIN game_groups g ON g.id = s.group_id
+            WHERE s.id = @SessionId AND s.status = @Planned
+            """,
+            new { SessionId = sessionId, Planned = SessionStatus.Planned });
+
+        if (session is null)
+        {
+            logger.LogWarning("Session {SessionId} not found or not in Planned status", sessionId);
+            return;
+        }
+
+        var participants = (await connection.QueryAsync<ConfirmationParticipantRow>(
+            """
+            SELECT COALESCE(p.platform, 'Telegram') AS Platform,
+                   COALESCE(p.external_user_id, p.telegram_id::TEXT) AS ExternalUserId,
+                   p.display_name AS DisplayName,
+                   COALESCE(p.external_username, p.telegram_username) AS ExternalUsername,
+                   sp.rsvp_status AS RsvpStatus,
+                   sp.registration_status AS RegistrationStatus,
+                   sp.is_gm AS IsGm
+            FROM session_participants sp
+            JOIN players p ON p.id = sp.player_id
+            WHERE sp.session_id = @SessionId
+              AND sp.is_gm = false
+              AND sp.registration_status = @Active
+            ORDER BY sp.created_at ASC
+            """,
+            new { SessionId = sessionId, Active = ParticipantRegistrationStatus.Active }))
+            .Select(ToParticipant)
+            .ToList();
+
+        if (participants.Count == 0)
+        {
+            logger.LogWarning("Session {SessionId} has no non-GM participants", sessionId);
+            return;
+        }
+
+        var group = CreateGroup(session);
+        var message = await messenger.SendConfirmationRequestAsync(
+            new PlatformConfirmationRequest(
+                group,
+                session.Id,
+                session.Title,
+                session.ScheduledAt,
+                participants),
+            ct);
+
+        await connection.ExecuteAsync(
+            """
+            UPDATE sessions
+            SET status = @Status,
+                confirmation_message_id = @MessageId,
+                confirmation_sent_at = now(),
+                updated_at = now()
+            WHERE id = @SessionId
+              AND confirmation_sent_at IS NULL
+            """,
+            new
+            {
+                SessionId = sessionId,
+                Status = SessionStatus.ConfirmationSent,
+                MessageId = TryGetTelegramMessageId(message)
+            });
+
+        await PersistPlatformMessageAsync(
+            connection,
+            message,
+            session.GroupId,
+            session.Id,
+            batchId: null,
+            purpose: "confirmation");
+
+        var mode = SessionNotificationModeExtensions.FromDatabaseValue(session.NotificationMode);
+        if (mode.ShouldSendDirectMessages())
+        {
+            await directSender.SendAsync(
+                PlatformDirectSessionNotificationKind.ConfirmationRequest,
+                participants.Select(p => p.User),
+                session.Id,
+                session.Title,
+                session.ScheduledAt,
+                joinLink: null,
+                actorDisplayName: null,
+                reason: null,
+                ct);
+        }
+
+        logger.LogInformation(
+            "Confirmation sent for session {SessionId} ({Title}), platform={Platform}, message_id={MessageId}",
+            sessionId,
+            session.Title,
+            message.Platform,
+            message.ExternalMessageId);
+    }
+
+    private static PlatformSessionParticipant ToParticipant(ConfirmationParticipantRow row) =>
+        new(
+            new PlatformUser(
+                ParsePlatform(row.Platform),
+                row.ExternalUserId,
+                row.DisplayName,
+                row.ExternalUsername),
+            row.RsvpStatus,
+            row.RegistrationStatus,
+            row.IsGm);
+
+    private static PlatformGroup CreateGroup(ConfirmationSessionRow row) =>
+        new(
+            ParsePlatform(row.Platform),
+            row.ExternalGroupId,
+            row.DisplayName,
+            row.ExternalChannelId,
+            row.ThreadId?.ToString(CultureInfo.InvariantCulture));
+
+    private static PlatformKind ParsePlatform(string platform) =>
+        Enum.Parse<PlatformKind>(platform, ignoreCase: true);
+
+    private static int? TryGetTelegramMessageId(PlatformMessageRef message) =>
+        message.Platform == PlatformKind.Telegram &&
+        int.TryParse(message.ExternalMessageId, NumberStyles.Integer, CultureInfo.InvariantCulture, out var messageId)
+            ? messageId
+            : null;
+
+    private static Task PersistPlatformMessageAsync(
+        NpgsqlConnection connection,
+        PlatformMessageRef message,
+        Guid groupId,
+        Guid? sessionId,
+        Guid? batchId,
+        string purpose) =>
+        connection.ExecuteAsync(
+            """
+            INSERT INTO platform_messages (
+                platform,
+                group_id,
+                batch_id,
+                session_id,
+                external_channel_id,
+                external_thread_id,
+                external_message_id,
+                purpose)
+            VALUES (
+                @Platform,
+                @GroupId,
+                @BatchId,
+                @SessionId,
+                @ExternalChannelId,
+                @ExternalThreadId,
+                @ExternalMessageId,
+                @Purpose)
+            """,
+            new
+            {
+                Platform = message.Platform.ToString(),
+                GroupId = groupId,
+                BatchId = batchId,
+                SessionId = sessionId,
+                ExternalChannelId = message.ExternalGroupId,
+                message.ExternalThreadId,
+                message.ExternalMessageId,
+                Purpose = purpose
+            });
+}

src/GmRelay.Shared/Features/Notifications/PlatformDirectNotificationSender.cs

@@ -0,0 +1,50 @@
+using GmRelay.Shared.Platform;
+using Microsoft.Extensions.Logging;
+
+namespace GmRelay.Shared.Features.Notifications;
+
+public sealed class PlatformDirectNotificationSender(
+    IPlatformMessenger messenger,
+    ILogger<PlatformDirectNotificationSender> logger)
+{
+    public async Task SendAsync(
+        PlatformDirectSessionNotificationKind kind,
+        IEnumerable<PlatformUser> recipients,
+        Guid sessionId,
+        string title,
+        DateTime scheduledAt,
+        string? joinLink,
+        string? actorDisplayName,
+        string? reason,
+        CancellationToken ct)
+    {
+        foreach (var recipient in recipients)
+        {
+            try
+            {
+                await messenger.SendDirectSessionNotificationAsync(
+                    new PlatformDirectSessionNotification(
+                        kind,
+                        recipient,
+                        sessionId,
+                        title,
+                        scheduledAt,
+                        joinLink,
+                        actorDisplayName,
+                        reason),
+                    ct);
+            }
+            catch (Exception ex)
+            {
+                logger.LogWarning(
+                    ex,
+                    "Failed to send {NotificationKind} notification for session {SessionId} to {Platform} user {ExternalUserId} ({DisplayName})",
+                    kind,
+                    sessionId,
+                    recipient.Platform,
+                    recipient.ExternalUserId,
+                    recipient.DisplayName);
+            }
+        }
+    }
+}

src/GmRelay.Shared/Features/Reminders/SendJoinLink/ISendJoinLinkHandler.cs

@@ -1,4 +1,4 @@
-namespace GmRelay.Bot.Features.Reminders.SendJoinLink;
+namespace GmRelay.Shared.Features.Reminders.SendJoinLink;
 
 public interface ISendJoinLinkHandler
 {

src/GmRelay.Shared/Features/Reminders/SendJoinLink/SendJoinLinkHandler.cs

@@ -0,0 +1,228 @@
+using System.Globalization;
+using Dapper;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Notifications;
+using GmRelay.Shared.Platform;
+using Microsoft.Extensions.Logging;
+using Npgsql;
+
+namespace GmRelay.Shared.Features.Reminders.SendJoinLink;
+
+internal sealed record JoinLinkSessionRow(
+    Guid Id,
+    Guid GroupId,
+    string Title,
+    string JoinLink,
+    DateTime ScheduledAt,
+    string Platform,
+    string ExternalGroupId,
+    string DisplayName,
+    string? ExternalChannelId,
+    int? ThreadId,
+    string NotificationMode);
+
+internal sealed record JoinLinkPlayerRow(
+    string Platform,
+    string ExternalUserId,
+    string DisplayName,
+    string? ExternalUsername,
+    string RsvpStatus,
+    string RegistrationStatus,
+    bool IsGm);
+
+public sealed class SendJoinLinkHandler(
+    NpgsqlDataSource dataSource,
+    IPlatformMessenger messenger,
+    PlatformDirectNotificationSender directSender,
+    ILogger<SendJoinLinkHandler> logger) : ISendJoinLinkHandler
+{
+    public async Task HandleAsync(Guid sessionId, CancellationToken ct)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+
+        var session = await connection.QuerySingleOrDefaultAsync<JoinLinkSessionRow>(
+            """
+            SELECT s.id,
+                   s.group_id AS GroupId,
+                   s.title,
+                   s.join_link AS JoinLink,
+                   s.scheduled_at AS ScheduledAt,
+                   COALESCE(g.platform, 'Telegram') AS Platform,
+                   COALESCE(g.external_group_id, g.telegram_chat_id::TEXT) AS ExternalGroupId,
+                   g.name AS DisplayName,
+                   COALESCE(g.external_channel_id, g.telegram_chat_id::TEXT) AS ExternalChannelId,
+                   s.thread_id AS ThreadId,
+                   s.notification_mode AS NotificationMode
+            FROM sessions s
+            JOIN game_groups g ON g.id = s.group_id
+            WHERE s.id = @SessionId
+              AND s.status = @Confirmed
+              AND (
+                    (COALESCE(g.platform, 'Telegram') = 'Telegram' AND s.link_message_id IS NULL)
+                    OR (
+                        COALESCE(g.platform, 'Telegram') <> 'Telegram'
+                        AND NOT EXISTS (
+                            SELECT 1
+                            FROM platform_messages pm
+                            WHERE pm.session_id = s.id
+                              AND pm.platform = COALESCE(g.platform, 'Telegram')
+                              AND pm.purpose = 'join_link'
+                        )
+                    )
+                  )
+            """,
+            new { SessionId = sessionId, Confirmed = SessionStatus.Confirmed });
+
+        if (session is null)
+        {
+            logger.LogWarning("Session {SessionId} not eligible for join link", sessionId);
+            return;
+        }
+
+        var players = (await connection.QueryAsync<JoinLinkPlayerRow>(
+            """
+            SELECT COALESCE(p.platform, 'Telegram') AS Platform,
+                   COALESCE(p.external_user_id, p.telegram_id::TEXT) AS ExternalUserId,
+                   p.display_name AS DisplayName,
+                   COALESCE(p.external_username, p.telegram_username) AS ExternalUsername,
+                   sp.rsvp_status AS RsvpStatus,
+                   sp.registration_status AS RegistrationStatus,
+                   sp.is_gm AS IsGm
+            FROM session_participants sp
+            JOIN players p ON p.id = sp.player_id
+            WHERE sp.session_id = @SessionId
+              AND sp.rsvp_status = @Confirmed
+              AND sp.registration_status = @Active
+            ORDER BY sp.created_at ASC
+            """,
+            new
+            {
+                SessionId = sessionId,
+                Confirmed = RsvpStatus.Confirmed,
+                Active = ParticipantRegistrationStatus.Active
+            }))
+            .Select(ToParticipant)
+            .ToList();
+
+        var group = CreateGroup(session);
+        var message = await messenger.SendJoinLinkNotificationAsync(
+            new PlatformJoinLinkNotification(
+                group,
+                session.Id,
+                session.Title,
+                session.ScheduledAt,
+                session.JoinLink,
+                players),
+            ct);
+
+        await connection.ExecuteAsync(
+            """
+            UPDATE sessions
+            SET    link_message_id = @MessageId, updated_at = now()
+            WHERE  id = @SessionId
+            """,
+            new
+            {
+                SessionId = sessionId,
+                MessageId = TryGetTelegramMessageId(message)
+            });
+
+        await PersistPlatformMessageAsync(
+            connection,
+            message,
+            session.GroupId,
+            session.Id,
+            batchId: null,
+            purpose: "join_link");
+
+        var mode = SessionNotificationModeExtensions.FromDatabaseValue(session.NotificationMode);
+        if (mode.ShouldSendDirectMessages())
+        {
+            await directSender.SendAsync(
+                PlatformDirectSessionNotificationKind.JoinLink,
+                players.Select(p => p.User),
+                session.Id,
+                session.Title,
+                session.ScheduledAt,
+                session.JoinLink,
+                actorDisplayName: null,
+                reason: null,
+                ct);
+        }
+
+        logger.LogInformation(
+            "Join link sent for session {SessionId} ({Title}), platform={Platform}, message_id={MessageId}",
+            sessionId,
+            session.Title,
+            message.Platform,
+            message.ExternalMessageId);
+    }
+
+    private static PlatformSessionParticipant ToParticipant(JoinLinkPlayerRow row) =>
+        new(
+            new PlatformUser(
+                ParsePlatform(row.Platform),
+                row.ExternalUserId,
+                row.DisplayName,
+                row.ExternalUsername),
+            row.RsvpStatus,
+            row.RegistrationStatus,
+            row.IsGm);
+
+    private static PlatformGroup CreateGroup(JoinLinkSessionRow row) =>
+        new(
+            ParsePlatform(row.Platform),
+            row.ExternalGroupId,
+            row.DisplayName,
+            row.ExternalChannelId,
+            row.ThreadId?.ToString(CultureInfo.InvariantCulture));
+
+    private static PlatformKind ParsePlatform(string platform) =>
+        Enum.Parse<PlatformKind>(platform, ignoreCase: true);
+
+    private static int? TryGetTelegramMessageId(PlatformMessageRef message) =>
+        message.Platform == PlatformKind.Telegram &&
+        int.TryParse(message.ExternalMessageId, NumberStyles.Integer, CultureInfo.InvariantCulture, out var messageId)
+            ? messageId
+            : null;
+
+    private static Task PersistPlatformMessageAsync(
+        NpgsqlConnection connection,
+        PlatformMessageRef message,
+        Guid groupId,
+        Guid? sessionId,
+        Guid? batchId,
+        string purpose) =>
+        connection.ExecuteAsync(
+            """
+            INSERT INTO platform_messages (
+                platform,
+                group_id,
+                batch_id,
+                session_id,
+                external_channel_id,
+                external_thread_id,
+                external_message_id,
+                purpose)
+            VALUES (
+                @Platform,
+                @GroupId,
+                @BatchId,
+                @SessionId,
+                @ExternalChannelId,
+                @ExternalThreadId,
+                @ExternalMessageId,
+                @Purpose)
+            """,
+            new
+            {
+                Platform = message.Platform.ToString(),
+                GroupId = groupId,
+                BatchId = batchId,
+                SessionId = sessionId,
+                ExternalChannelId = message.ExternalGroupId,
+                message.ExternalThreadId,
+                message.ExternalMessageId,
+                Purpose = purpose
+            });
+}

src/GmRelay.Shared/Features/Reminders/SendOneHourReminder/ISendOneHourReminderHandler.cs

@@ -1,4 +1,4 @@
-namespace GmRelay.Bot.Features.Reminders.SendOneHourReminder;
+namespace GmRelay.Shared.Features.Reminders.SendOneHourReminder;
 
 public interface ISendOneHourReminderHandler
 {

src/GmRelay.Shared/Features/Reminders/SendOneHourReminder/SendOneHourReminderHandler.cs

@@ -1,27 +1,35 @@
 using Dapper;
-using GmRelay.Bot.Features.Notifications;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Notifications;
+using GmRelay.Shared.Platform;
+using Microsoft.Extensions.Logging;
 using Npgsql;
 
-namespace GmRelay.Bot.Features.Reminders.SendOneHourReminder;
+namespace GmRelay.Shared.Features.Reminders.SendOneHourReminder;
 
-internal sealed record OneHourReminderSession(
+internal sealed record OneHourReminderSessionRow(
     Guid Id,
     string Title,
     string JoinLink,
     DateTime ScheduledAt,
     string NotificationMode);
 
+internal sealed record OneHourReminderRecipientRow(
+    string Platform,
+    string ExternalUserId,
+    string DisplayName,
+    string? ExternalUsername);
+
 public sealed class SendOneHourReminderHandler(
     NpgsqlDataSource dataSource,
-    DirectSessionNotificationSender directSender,
+    PlatformDirectNotificationSender directSender,
     ILogger<SendOneHourReminderHandler> logger) : ISendOneHourReminderHandler
 {
     public async Task HandleAsync(Guid sessionId, CancellationToken ct)
     {
         await using var connection = await dataSource.OpenConnectionAsync(ct);
 
-        var session = await connection.QuerySingleOrDefaultAsync<OneHourReminderSession>(
+        var session = await connection.QuerySingleOrDefaultAsync<OneHourReminderSessionRow>(
             """
             SELECT id,
                    title,
@@ -46,10 +54,12 @@ public sealed class SendOneHourReminderHandler(
             return;
         }
 
-        var recipients = (await connection.QueryAsync<DirectNotificationRecipient>(
+        var recipients = (await connection.QueryAsync<OneHourReminderRecipientRow>(
             """
-            SELECT p.telegram_id AS TelegramId,
+            SELECT COALESCE(p.platform, 'Telegram') AS Platform,
-                   p.display_name AS DisplayName
+                   COALESCE(p.external_user_id, p.telegram_id::TEXT) AS ExternalUserId,
+                   p.display_name AS DisplayName,
+                   COALESCE(p.external_username, p.telegram_username) AS ExternalUsername
             FROM session_participants sp
             JOIN players p ON p.id = sp.player_id
             WHERE sp.session_id = @SessionId
@@ -62,20 +72,27 @@ public sealed class SendOneHourReminderHandler(
                 SessionId = sessionId,
                 Active = ParticipantRegistrationStatus.Active,
                 Declined = RsvpStatus.Declined
-            })).ToList();
+            }))
+            .Select(row => new PlatformUser(
+                ParsePlatform(row.Platform),
+                row.ExternalUserId,
+                row.DisplayName,
+                row.ExternalUsername))
+            .ToList();
 
         var mode = SessionNotificationModeExtensions.FromDatabaseValue(session.NotificationMode);
         if (mode.ShouldSendDirectMessages() && recipients.Count > 0)
         {
-            var text = $"""
+            await directSender.SendAsync(
-                ⏰ <b>Игра начнётся примерно через 1 час</b>
+                PlatformDirectSessionNotificationKind.OneHourReminder,
-
+                recipients,
-                📌 <b>{System.Net.WebUtility.HtmlEncode(session.Title)}</b>
+                session.Id,
-                📅 {session.ScheduledAt.FormatMoscow()} (МСК)
+                session.Title,
-                🔗 {System.Net.WebUtility.HtmlEncode(session.JoinLink)}
+                session.ScheduledAt,
-                """;
+                session.JoinLink,
-
+                actorDisplayName: null,
-            await directSender.SendAsync(recipients, text, "one-hour-reminder", session.Id, ct);
+                reason: null,
+                ct);
         }
 
         await connection.ExecuteAsync(
@@ -94,4 +111,7 @@ public sealed class SendOneHourReminderHandler(
             session.Title,
             session.NotificationMode);
     }
+
+    private static PlatformKind ParsePlatform(string platform) =>
+        Enum.Parse<PlatformKind>(platform, ignoreCase: true);
 }

src/GmRelay.Shared/Features/Sessions/CreateSession/JoinSessionHandler.cs

@@ -4,8 +4,9 @@ using Npgsql;
 using GmRelay.Shared.Domain;
 using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
+using Microsoft.Extensions.Logging;
 
-namespace GmRelay.Bot.Features.Sessions.CreateSession;
+namespace GmRelay.Shared.Features.Sessions.CreateSession;
 
 public sealed record JoinSessionCommand(
     Guid SessionId,
@@ -15,15 +16,17 @@ public sealed record JoinSessionCommand(
     PlatformMessageRef ScheduleMessage);
 
 // DTOs for AOT compilation
-internal sealed record JoinSessionBatchDto(Guid BatchId, string Title, int? MaxPlayers);
+internal sealed record JoinSessionBatchDto(Guid BatchId, string Title, string Status, int? MaxPlayers);
 
 public sealed class JoinSessionHandler(
     NpgsqlDataSource dataSource,
     IPlatformMessenger messenger,
+    IScheduleMessageUpdateLock scheduleUpdateLock,
     ILogger<JoinSessionHandler> logger)
 {
     public async Task HandleAsync(JoinSessionCommand command, CancellationToken ct)
     {
+        await using var updateLock = await scheduleUpdateLock.AcquireAsync(command.ScheduleMessage, ct);
         await using var connection = await dataSource.OpenConnectionAsync(ct);
         await using var transaction = await connection.BeginTransactionAsync(ct);
         var transactionCommitted = false;
@@ -64,7 +67,7 @@ public sealed class JoinSessionHandler(
 
             // 2. Блокируем сессию на время расчета мест, чтобы параллельные нажатия не переполнили состав.
             var batchInfo = await connection.QuerySingleOrDefaultAsync<JoinSessionBatchDto>(
-                @"SELECT batch_id as BatchId, title as Title, max_players as MaxPlayers
+                @"SELECT batch_id as BatchId, title as Title, status as Status, max_players as MaxPlayers
                   FROM sessions
                   WHERE id = @SessionId
                   FOR UPDATE",
@@ -78,6 +81,13 @@ public sealed class JoinSessionHandler(
                 return;
             }
 
+            if (SessionStatus.IsCancelled(batchInfo.Status))
+            {
+                await transaction.RollbackAsync(ct);
+                await AnswerAsync(command.InteractionId, "Сессия уже отменена.", ct);
+                return;
+            }
+
             var existingRegistrationStatus = await connection.ExecuteScalarAsync<string?>(
                 """
                 SELECT sp.registration_status

src/GmRelay.Shared/Features/Sessions/CreateSession/LeaveSessionHandler.cs

@@ -2,9 +2,10 @@ using Dapper;
 using GmRelay.Shared.Domain;
 using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
+using Microsoft.Extensions.Logging;
 using Npgsql;
 
-namespace GmRelay.Bot.Features.Sessions.CreateSession;
+namespace GmRelay.Shared.Features.Sessions.CreateSession;
 
 public sealed record LeaveSessionCommand(
     Guid SessionId,
@@ -20,10 +21,12 @@ internal sealed record LeaveSessionPromotionDto(Guid ParticipantRowId, string Di
 public sealed class LeaveSessionHandler(
     NpgsqlDataSource dataSource,
     IPlatformMessenger messenger,
+    IScheduleMessageUpdateLock scheduleUpdateLock,
     ILogger<LeaveSessionHandler> logger)
 {
     public async Task HandleAsync(LeaveSessionCommand command, CancellationToken ct)
     {
+        await using var updateLock = await scheduleUpdateLock.AcquireAsync(command.ScheduleMessage, ct);
         await using var connection = await dataSource.OpenConnectionAsync(ct);
         await using var transaction = await connection.BeginTransactionAsync(ct);
         var transactionCommitted = false;

src/GmRelay.Shared/Features/Sessions/CreateSession/ScheduleMessageUpdateLock.cs

@@ -0,0 +1,39 @@
+using System.Collections.Concurrent;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.Shared.Features.Sessions.CreateSession;
+
+public interface IScheduleMessageUpdateLock
+{
+    ValueTask<IAsyncDisposable> AcquireAsync(PlatformMessageRef scheduleMessage, CancellationToken ct);
+}
+
+public sealed class ScheduleMessageUpdateLock : IScheduleMessageUpdateLock
+{
+    private readonly ConcurrentDictionary<string, SemaphoreSlim> locks = new(StringComparer.Ordinal);
+
+    public async ValueTask<IAsyncDisposable> AcquireAsync(PlatformMessageRef scheduleMessage, CancellationToken ct)
+    {
+        var key = CreateKey(scheduleMessage);
+        var semaphore = locks.GetOrAdd(key, _ => new SemaphoreSlim(1, 1));
+        await semaphore.WaitAsync(ct);
+        return new Releaser(semaphore);
+    }
+
+    private static string CreateKey(PlatformMessageRef scheduleMessage) =>
+        string.Join(
+            '\u001F',
+            scheduleMessage.Platform.ToString(),
+            scheduleMessage.ExternalGroupId,
+            scheduleMessage.ExternalThreadId ?? string.Empty,
+            scheduleMessage.ExternalMessageId);
+
+    private sealed class Releaser(SemaphoreSlim semaphore) : IAsyncDisposable
+    {
+        public ValueTask DisposeAsync()
+        {
+            semaphore.Release();
+            return ValueTask.CompletedTask;
+        }
+    }
+}

src/GmRelay.Shared/Features/Sessions/RescheduleSession/RescheduleDtos.cs

@@ -0,0 +1,29 @@
+namespace GmRelay.Shared.Features.Sessions.RescheduleSession;
+
+public sealed record RescheduleOptionDto(
+    Guid OptionId,
+    int DisplayOrder,
+    DateTimeOffset ProposedAt);
+
+public sealed record VoteProposalDto(
+    Guid Id,
+    Guid SessionId,
+    DateTimeOffset VotingDeadlineAt,
+    string Title,
+    DateTime CurrentScheduledAt);
+
+public sealed record RescheduleOptionVoteDto(
+    Guid OptionId,
+    Guid PlayerId,
+    string DisplayName,
+    string? TelegramUsername);
+
+public sealed record RescheduleOptionVoteCount(
+    Guid OptionId,
+    int VoteCount);
+
+public sealed record VoteParticipantDto(
+    Guid PlayerId,
+    string DisplayName,
+    string? TelegramUsername,
+    long TelegramId = 0);

src/GmRelay.Shared/Features/Sessions/RescheduleSession/RescheduleVoteRules.cs

@@ -1,13 +1,13 @@
-namespace GmRelay.Bot.Features.Sessions.RescheduleSession;
+namespace GmRelay.Shared.Features.Sessions.RescheduleSession;
 
-internal enum RescheduleVoteOutcome
+public enum RescheduleVoteOutcome
 {
     Pending,
     Rejected,
     Approved
 }
 
-internal sealed record RescheduleVoteDecision(
+public sealed record RescheduleVoteDecision(
     RescheduleVoteOutcome Outcome,
     string Reason,
     Guid? SelectedOptionId = null,
@@ -15,7 +15,7 @@ internal sealed record RescheduleVoteDecision(
     bool ShouldRescheduleSession = false,
     bool ShouldResetParticipantRsvps = false);
 
-internal static class RescheduleVoteRules
+public static class RescheduleVoteRules
 {
     public static RescheduleVoteDecision SelectWinner(IReadOnlyList<RescheduleOptionVoteCount> voteCounts)
     {
@@ -49,8 +49,8 @@ internal static class RescheduleVoteRules
         {
             return new RescheduleVoteDecision(
                 Outcome: RescheduleVoteOutcome.Rejected,
-                Reason: "\u041e\u0434\u0438\u043d \u0438\u0437 \u0443\u0447\u0430\u0441\u0442\u043d\u0438\u043a\u043e\u0432 \u043e\u0442\u043a\u043b\u043e\u043d\u0438\u043b \u043f\u0435\u0440\u0435\u043d\u043e\u0441.",
+                Reason: "Один из участников отклонил перенос.",
-                CallbackText: "\u0412\u044b \u043f\u0440\u043e\u0433\u043e\u043b\u043e\u0441\u043e\u0432\u0430\u043b\u0438 \u043f\u0440\u043e\u0442\u0438\u0432 \u043f\u0435\u0440\u0435\u043d\u043e\u0441\u0430.");
+                CallbackText: "Вы проголосовали против переноса.");
         }
 
         var everyoneApproved = approvedParticipants == totalParticipants;
@@ -58,11 +58,11 @@ internal static class RescheduleVoteRules
         return new RescheduleVoteDecision(
             Outcome: everyoneApproved ? RescheduleVoteOutcome.Approved : RescheduleVoteOutcome.Pending,
             Reason: everyoneApproved
-                ? "\u0412\u0441\u0435 \u0443\u0447\u0430\u0441\u0442\u043d\u0438\u043a\u0438 \u0441\u043e\u0433\u043b\u0430\u0441\u043d\u044b."
+                ? "Все участники согласны."
-                : "\u0413\u043e\u043b\u043e\u0441\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442\u0441\u044f.",
+                : "Голосование продолжается.",
             CallbackText: everyoneApproved
-                ? "\u0412\u044b \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0434\u0438\u043b\u0438 \u043f\u0435\u0440\u0435\u043d\u043e\u0441! \u0412\u0441\u0435 \u0441\u043e\u0433\u043b\u0430\u0441\u043d\u044b \u2014 \u0432\u0440\u0435\u043c\u044f \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u043e."
+                ? "Вы подтвердили перенос! Все согласны — время обновлено."
-                : "\u0412\u044b \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0434\u0438\u043b\u0438 \u043f\u0435\u0440\u0435\u043d\u043e\u0441!",
+                : "Вы подтвердили перенос!",
             ShouldRescheduleSession: everyoneApproved,
             ShouldResetParticipantRsvps: everyoneApproved);
     }

src/GmRelay.Shared/Features/Sessions/RescheduleSession/RescheduleVotingFinalizer.cs

@@ -0,0 +1,215 @@
+using Dapper;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
+using Microsoft.Extensions.Logging;
+using Npgsql;
+
+namespace GmRelay.Shared.Features.Sessions.RescheduleSession;
+
+public sealed record RescheduleVotingFinalizerResult(
+    Guid ProposalId,
+    Guid SessionId,
+    string Title,
+    DateTime CurrentScheduledAt,
+    Guid BatchId,
+    string NotificationMode,
+    string SourcePlatform,
+    DateTimeOffset VotingDeadlineAt,
+    RescheduleVoteDecision Decision,
+    RescheduleOptionDto? SelectedOption,
+    IReadOnlyList<RescheduleOptionDto> Options,
+    IReadOnlyList<RescheduleOptionVoteDto> Votes,
+    IReadOnlyList<VoteParticipantDto> Participants);
+
+public sealed class RescheduleVotingFinalizer(
+    NpgsqlDataSource dataSource,
+    ISystemClock clock,
+    ILogger<RescheduleVotingFinalizer> logger)
+{
+    public async Task<IReadOnlyList<Guid>> GetDueProposalIdsAsync(string sourcePlatform, CancellationToken ct)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+        var proposalIds = (await connection.QueryAsync<Guid>(
+            """
+            SELECT id
+            FROM reschedule_proposals
+            WHERE status = 'Voting'
+              AND voting_deadline_at IS NOT NULL
+              AND voting_deadline_at <= @Now
+              AND source_platform = @SourcePlatform
+            ORDER BY voting_deadline_at
+            LIMIT 25
+            """,
+            new { Now = clock.UtcNow.UtcDateTime, SourcePlatform = sourcePlatform })).ToList();
+
+        return proposalIds;
+    }
+
+    public async Task<RescheduleVotingFinalizerResult?> FinalizeAsync(Guid proposalId, CancellationToken ct)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+        await using var transaction = await connection.BeginTransactionAsync(ct);
+
+        var proposal = await connection.QuerySingleOrDefaultAsync<ProposalRow>(
+            """
+            SELECT rp.id AS ProposalId,
+                   rp.session_id AS SessionId,
+                   rp.voting_deadline_at AS VotingDeadlineAt,
+                   rp.source_platform AS SourcePlatform,
+                   s.title AS Title,
+                   s.scheduled_at AS CurrentScheduledAt,
+                   s.batch_id AS BatchId,
+                   s.notification_mode AS NotificationMode
+            FROM reschedule_proposals rp
+            JOIN sessions s ON s.id = rp.session_id
+            WHERE rp.id = @ProposalId
+              AND rp.status = 'Voting'
+              AND rp.voting_deadline_at IS NOT NULL
+              AND rp.voting_deadline_at <= @Now
+            FOR UPDATE
+            """,
+            new { ProposalId = proposalId, Now = clock.UtcNow.UtcDateTime },
+            transaction);
+
+        if (proposal is null)
+            return null;
+
+        var participants = (await connection.QueryAsync<VoteParticipantDto>(
+            """
+            SELECT p.id AS PlayerId,
+                   p.display_name AS DisplayName,
+                   p.telegram_username AS TelegramUsername,
+                   p.telegram_id AS TelegramId
+            FROM session_participants sp
+            JOIN players p ON p.id = sp.player_id
+            WHERE sp.session_id = @SessionId
+              AND sp.is_gm = false
+              AND sp.registration_status = @Active
+            ORDER BY p.display_name
+            """,
+            new { proposal.SessionId, Active = ParticipantRegistrationStatus.Active },
+            transaction)).ToList();
+
+        var options = (await connection.QueryAsync<RescheduleOptionDto>(
+            """
+            SELECT id AS OptionId,
+                   display_order AS DisplayOrder,
+                   proposed_at AS ProposedAt
+            FROM reschedule_options
+            WHERE proposal_id = @ProposalId
+            ORDER BY display_order
+            """,
+            new { ProposalId = proposal.ProposalId },
+            transaction)).ToList();
+
+        var votes = (await connection.QueryAsync<RescheduleOptionVoteDto>(
+            """
+            SELECT rov.option_id AS OptionId,
+                   p.id AS PlayerId,
+                   p.display_name AS DisplayName,
+                   p.telegram_username AS TelegramUsername
+            FROM reschedule_option_votes rov
+            JOIN players p ON p.id = rov.player_id
+            WHERE rov.proposal_id = @ProposalId
+            ORDER BY rov.voted_at, p.display_name
+            """,
+            new { ProposalId = proposal.ProposalId },
+            transaction)).ToList();
+
+        var voteCounts = options
+            .Select(option => new RescheduleOptionVoteCount(
+                option.OptionId,
+                votes.Count(vote => vote.OptionId == option.OptionId)))
+            .ToList();
+        var decision = RescheduleVoteRules.SelectWinner(voteCounts);
+        var selectedOption = decision.SelectedOptionId is { } selectedOptionId
+            ? options.Single(x => x.OptionId == selectedOptionId)
+            : null;
+
+        if (selectedOption is not null)
+        {
+            await connection.ExecuteAsync(
+                """
+                UPDATE sessions
+                SET scheduled_at = @NewTime,
+                    status = @Status,
+                    confirmation_message_id = NULL,
+                    confirmation_sent_at = NULL,
+                    link_message_id = NULL,
+                    one_hour_reminder_processed_at = NULL,
+                    updated_at = now()
+                WHERE id = @SessionId
+                """,
+                new { NewTime = selectedOption.ProposedAt, proposal.SessionId, Status = SessionStatus.Planned },
+                transaction);
+
+            await connection.ExecuteAsync(
+                """
+                UPDATE session_participants
+                SET rsvp_status = 'Pending',
+                    responded_at = NULL
+                WHERE session_id = @SessionId
+                  AND is_gm = false
+                  AND registration_status = @Active
+                """,
+                new { proposal.SessionId, Active = ParticipantRegistrationStatus.Active },
+                transaction);
+
+            await connection.ExecuteAsync(
+                """
+                UPDATE reschedule_proposals
+                SET status = 'Approved',
+                    selected_option_id = @SelectedOptionId,
+                    proposed_at = @ProposedAt
+                WHERE id = @ProposalId
+                """,
+                new
+                {
+                    ProposalId = proposal.ProposalId,
+                    SelectedOptionId = selectedOption.OptionId,
+                    ProposedAt = selectedOption.ProposedAt
+                },
+                transaction);
+        }
+        else
+        {
+            await connection.ExecuteAsync(
+                "UPDATE reschedule_proposals SET status = 'Rejected' WHERE id = @ProposalId",
+                new { ProposalId = proposal.ProposalId },
+                transaction);
+        }
+
+        await transaction.CommitAsync(ct);
+
+        logger.LogInformation(
+            "Finalized reschedule proposal {ProposalId} for session {SessionId} with outcome {Outcome}",
+            proposal.ProposalId,
+            proposal.SessionId,
+            decision.Outcome);
+
+        return new RescheduleVotingFinalizerResult(
+            proposal.ProposalId,
+            proposal.SessionId,
+            proposal.Title,
+            proposal.CurrentScheduledAt,
+            proposal.BatchId,
+            proposal.NotificationMode,
+            proposal.SourcePlatform,
+            proposal.VotingDeadlineAt,
+            decision,
+            selectedOption,
+            options,
+            votes,
+            participants);
+    }
+
+    private sealed record ProposalRow(
+        Guid ProposalId,
+        Guid SessionId,
+        DateTimeOffset VotingDeadlineAt,
+        string SourcePlatform,
+        string Title,
+        DateTime CurrentScheduledAt,
+        Guid BatchId,
+        string NotificationMode);
+}

src/GmRelay.Shared/Features/Sessions/RescheduleSession/RescheduleVotingInput.cs

@@ -1,9 +1,9 @@
 using System.Text.RegularExpressions;
 using GmRelay.Shared.Domain;
 
-namespace GmRelay.Bot.Features.Sessions.RescheduleSession;
+namespace GmRelay.Shared.Features.Sessions.RescheduleSession;
 
-internal sealed record RescheduleVotingInput(
+public sealed record RescheduleVotingInput(
     IReadOnlyList<DateTimeOffset> Options,
     DateTimeOffset Deadline)
 {
@@ -93,18 +93,3 @@ internal sealed record RescheduleVotingInput(
             || normalized.StartsWith("до:", StringComparison.Ordinal);
     }
 }
-
-internal sealed record RescheduleOptionDto(
-    Guid OptionId,
-    int DisplayOrder,
-    DateTimeOffset ProposedAt);
-
-internal sealed record RescheduleOptionVoteDto(
-    Guid OptionId,
-    Guid PlayerId,
-    string DisplayName,
-    string? TelegramUsername);
-
-internal sealed record RescheduleOptionVoteCount(
-    Guid OptionId,
-    int VoteCount);

src/GmRelay.Shared/GmRelay.Shared.csproj

@@ -5,6 +5,15 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <LangVersion>preview</LangVersion>
+    <InterceptorsPreviewNamespaces>$(InterceptorsPreviewNamespaces);Dapper.AOT</InterceptorsPreviewNamespaces>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Dapper" Version="2.1.72" />
+    <PackageReference Include="Dapper.AOT" Version="1.0.48" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="10.0.5" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.5" />
+    <PackageReference Include="Npgsql" Version="10.0.2" />
+  </ItemGroup>
+
 </Project>

src/GmRelay.Shared/Infrastructure/Scheduling/ISessionTriggerStore.cs

@@ -2,7 +2,7 @@ using Dapper;
 using GmRelay.Shared.Domain;
 using Npgsql;
 
-namespace GmRelay.Bot.Infrastructure.Scheduling;
+namespace GmRelay.Shared.Infrastructure.Scheduling;
 
 public interface ISessionTriggerStore
 {
@@ -11,7 +11,9 @@ public interface ISessionTriggerStore
     Task<IReadOnlyList<Guid>> GetSessionsNeedingJoinLinkAsync(DateTimeOffset now, CancellationToken ct);
 }
 
-public sealed class DbSessionTriggerStore(NpgsqlDataSource dataSource) : ISessionTriggerStore
+public sealed class DbSessionTriggerStore(
+    NpgsqlDataSource dataSource,
+    PlatformSchedulerOptions options) : ISessionTriggerStore
 {
     private static readonly TimeSpan ConfirmationLeadTime = TimeSpan.FromHours(24);
     private static readonly TimeSpan OneHourReminderLeadTime = TimeSpan.FromHours(1);
@@ -23,14 +25,17 @@ public sealed class DbSessionTriggerStore(NpgsqlDataSource dataSource) : ISessio
 
         var results = await connection.QueryAsync<Guid>(
             """
-            SELECT id
+            SELECT s.id
-            FROM sessions
+            FROM sessions s
-            WHERE status = @Planned
+            JOIN game_groups g ON g.id = s.group_id
-              AND scheduled_at - @LeadTime <= @Now
+            WHERE g.platform = @Platform
-              AND confirmation_sent_at IS NULL
+              AND s.status = @Planned
+              AND s.scheduled_at - @LeadTime <= @Now
+              AND s.confirmation_sent_at IS NULL
             """,
             new
             {
+                Platform = options.Platform.ToString(),
                 Planned = SessionStatus.Planned,
                 LeadTime = ConfirmationLeadTime,
                 Now = now.UtcDateTime
@@ -45,14 +50,17 @@ public sealed class DbSessionTriggerStore(NpgsqlDataSource dataSource) : ISessio
 
         var results = await connection.QueryAsync<Guid>(
             """
-            SELECT id
+            SELECT s.id
-            FROM sessions
+            FROM sessions s
-            WHERE status IN (@Confirmed, @ConfirmationSent)
+            JOIN game_groups g ON g.id = s.group_id
-              AND scheduled_at - @LeadTime <= @Now
+            WHERE g.platform = @Platform
-              AND one_hour_reminder_processed_at IS NULL
+              AND s.status IN (@Confirmed, @ConfirmationSent)
+              AND s.scheduled_at - @LeadTime <= @Now
+              AND s.one_hour_reminder_processed_at IS NULL
             """,
             new
             {
+                Platform = options.Platform.ToString(),
                 Confirmed = SessionStatus.Confirmed,
                 ConfirmationSent = SessionStatus.ConfirmationSent,
                 LeadTime = OneHourReminderLeadTime,
@@ -68,14 +76,29 @@ public sealed class DbSessionTriggerStore(NpgsqlDataSource dataSource) : ISessio
 
         var results = await connection.QueryAsync<Guid>(
             """
-            SELECT id
+            SELECT s.id
-            FROM sessions
+            FROM sessions s
-            WHERE status = @Confirmed
+            JOIN game_groups g ON g.id = s.group_id
-              AND scheduled_at - @LeadTime <= @Now
+            WHERE g.platform = @Platform
-              AND link_message_id IS NULL
+              AND s.status = @Confirmed
+              AND s.scheduled_at - @LeadTime <= @Now
+              AND (
+                    (g.platform = 'Telegram' AND s.link_message_id IS NULL)
+                    OR (
+                        g.platform <> 'Telegram'
+                        AND NOT EXISTS (
+                            SELECT 1
+                            FROM platform_messages pm
+                            WHERE pm.session_id = s.id
+                              AND pm.platform = g.platform
+                              AND pm.purpose = 'join_link'
+                        )
+                    )
+                  )
             """,
             new
             {
+                Platform = options.Platform.ToString(),
                 Confirmed = SessionStatus.Confirmed,
                 LeadTime = JoinLinkLeadTime,
                 Now = now.UtcDateTime

src/GmRelay.Shared/Infrastructure/Scheduling/PlatformSchedulerOptions.cs

@@ -0,0 +1,5 @@
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.Shared.Infrastructure.Scheduling;
+
+public sealed record PlatformSchedulerOptions(PlatformKind Platform);

src/GmRelay.Shared/Infrastructure/Scheduling/SessionSchedulerService.cs

@@ -1,17 +1,15 @@
-using GmRelay.Bot.Features.Confirmation.SendConfirmation;
+using GmRelay.Shared.Features.Confirmation.SendConfirmation;
-using GmRelay.Bot.Features.Reminders.SendJoinLink;
+using GmRelay.Shared.Features.Reminders.SendJoinLink;
-using GmRelay.Bot.Features.Reminders.SendOneHourReminder;
+using GmRelay.Shared.Features.Reminders.SendOneHourReminder;
+using GmRelay.Shared.Platform;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
 
-namespace GmRelay.Bot.Infrastructure.Scheduling;
+namespace GmRelay.Shared.Infrastructure.Scheduling;
 
 /// <summary>
 /// Stateless scheduler: wakes every 60 seconds, queries PostgreSQL for actionable sessions.
-/// Three triggers:
+/// All state is kept in the database so worker restarts do not lose scheduled work.
-///   T-24h: send confirmation request with inline keyboard
-///   T-1h:  send one-hour direct reminder
-///   T-5min: send join link to all confirmed players
-///
-/// If the Raspberry Pi reboots, nothing is lost — all state is in the DB.
 /// </summary>
 public sealed class SessionSchedulerService(
     ISessionTriggerStore triggerStore,
@@ -49,10 +47,6 @@ public sealed class SessionSchedulerService(
         logger.LogInformation("Session scheduler stopped");
     }
 
-    /// <summary>
-    /// Runs a single scheduler tick using the current clock time.
-    /// Public so it can be called from integration tests with a fake clock.
-    /// </summary>
     public async Task TickAsync(CancellationToken ct)
     {
         var now = clock.UtcNow;

src/GmRelay.Shared/Platform/IPlatformMessenger.cs

@@ -13,4 +13,22 @@ public interface IPlatformMessenger
     Task AnswerInteractionAsync(PlatformInteractionReply reply, CancellationToken ct);
 
     Task SendCalendarFileAsync(PlatformCalendarFile file, CancellationToken ct);
+
+    Task<PlatformMessageRef> SendConfirmationRequestAsync(PlatformConfirmationRequest request, CancellationToken ct) =>
+        throw new NotSupportedException("This platform messenger does not support confirmation requests.");
+
+    Task UpdateConfirmationRequestAsync(PlatformRsvpMessageUpdate update, CancellationToken ct) =>
+        throw new NotSupportedException("This platform messenger does not support confirmation request updates.");
+
+    Task<PlatformMessageRef> SendJoinLinkNotificationAsync(PlatformJoinLinkNotification notification, CancellationToken ct) =>
+        throw new NotSupportedException("This platform messenger does not support join-link notifications.");
+
+    Task SendDirectSessionNotificationAsync(PlatformDirectSessionNotification notification, CancellationToken ct) =>
+        throw new NotSupportedException("This platform messenger does not support direct session notifications.");
+
+    Task SendRsvpOutcomeAsync(PlatformRsvpOutcomeNotification notification, CancellationToken ct) =>
+        throw new NotSupportedException("This platform messenger does not support RSVP outcome notifications.");
+
+    Task UpdateRescheduleVoteAsync(PlatformRescheduleVoteUpdate update, CancellationToken ct) =>
+        throw new NotSupportedException("This platform messenger does not support reschedule vote updates.");
 }

src/GmRelay.Shared/Platform/ISystemClock.cs

@@ -0,0 +1,6 @@
+namespace GmRelay.Shared.Platform;
+
+public interface ISystemClock
+{
+    DateTimeOffset UtcNow { get; }
+}

src/GmRelay.Shared/Platform/PlatformMessageContracts.cs

@@ -1,3 +1,4 @@
+using GmRelay.Shared.Features.Sessions.RescheduleSession;
 using GmRelay.Shared.Rendering;
 
 namespace GmRelay.Shared.Platform;
@@ -34,3 +35,81 @@ public sealed record PlatformCalendarFile(
     byte[] Content,
     string CaptionHtml,
     IReadOnlyList<PlatformMessageAction> Actions);
+
+public sealed record PlatformSessionParticipant(
+    PlatformUser User,
+    string RsvpStatus,
+    string RegistrationStatus,
+    bool IsGm = false);
+
+public sealed record PlatformConfirmationRequest(
+    PlatformGroup Group,
+    Guid SessionId,
+    string Title,
+    DateTime ScheduledAt,
+    IReadOnlyList<PlatformSessionParticipant> Participants,
+    PlatformMessageRef? ExistingMessage = null);
+
+public sealed record PlatformJoinLinkNotification(
+    PlatformGroup Group,
+    Guid SessionId,
+    string Title,
+    DateTime ScheduledAt,
+    string JoinLink,
+    IReadOnlyList<PlatformSessionParticipant> ConfirmedPlayers,
+    PlatformMessageRef? ExistingMessage = null);
+
+public enum PlatformDirectSessionNotificationKind
+{
+    ConfirmationRequest = 0,
+    OneHourReminder = 1,
+    JoinLink = 2,
+    RsvpAllConfirmed = 3,
+    RsvpDeclined = 4,
+    RescheduleApproved = 5,
+    RescheduleRejected = 6
+}
+
+public sealed record PlatformDirectSessionNotification(
+    PlatformDirectSessionNotificationKind Kind,
+    PlatformUser Recipient,
+    Guid SessionId,
+    string Title,
+    DateTime ScheduledAt,
+    string? JoinLink = null,
+    string? ActorDisplayName = null,
+    string? Reason = null);
+
+public sealed record PlatformRsvpMessageUpdate(
+    PlatformConfirmationRequest Request,
+    bool DisableActions);
+
+public enum PlatformRsvpOutcomeKind
+{
+    GroupAllConfirmed = 0,
+    GmAllConfirmed = 1,
+    GmPlayerDeclined = 2
+}
+
+public sealed record PlatformRsvpOutcomeNotification(
+    PlatformRsvpOutcomeKind Kind,
+    PlatformGroup? Group,
+    IReadOnlyList<PlatformUser> Recipients,
+    Guid SessionId,
+    string Title,
+    DateTime ScheduledAt,
+    string? ActorDisplayName = null);
+
+public sealed record PlatformRescheduleVoteUpdate(
+    PlatformGroup Group,
+    PlatformMessageRef ExistingMessage,
+    Guid ProposalId,
+    Guid SessionId,
+    string Title,
+    DateTime CurrentScheduledAt,
+    DateTimeOffset VotingDeadlineAt,
+    RescheduleVoteDecision Decision,
+    RescheduleOptionDto? SelectedOption,
+    IReadOnlyList<RescheduleOptionDto> Options,
+    IReadOnlyList<RescheduleOptionVoteDto> Votes,
+    IReadOnlyList<VoteParticipantDto> Participants);

src/GmRelay.Shared/packages.lock.json

@@ -2,11 +2,98 @@
   "version": 1,
   "dependencies": {
     "net10.0": {
+      "Dapper": {
+        "type": "Direct",
+        "requested": "[2.1.72, )",
+        "resolved": "2.1.72",
+        "contentHash": "ns4mGqQd9a/MhP8m6w556vVlZIa0/MfUu03zrxjZC/jlr1uVCsUac8bkdB+Fs98Llbd56rRSo1eZH5VVmeGZyw=="
+      },
+      "Dapper.AOT": {
+        "type": "Direct",
+        "requested": "[1.0.48, )",
+        "resolved": "1.0.48",
+        "contentHash": "rsLM3yKr4g+YKKox9lhc8D+kz67P7Q9+xdyn1LmCsoYr1kYpJSm+Nt6slo5UrfUrcTiGJ57zUlyO8XUdV7G7iA=="
+      },
+      "Microsoft.Extensions.Hosting.Abstractions": {
+        "type": "Direct",
+        "requested": "[10.0.5, )",
+        "resolved": "10.0.5",
+        "contentHash": "+Wb7KAMVZTomwJkQrjuPTe5KBzGod7N8XeG+ScxRlkPOB4sZLG4ccVwjV4Phk5BCJt7uIMnGHVoN6ZMVploX+g==",
+        "dependencies": {
+          "Microsoft.Extensions.Configuration.Abstractions": "10.0.5",
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Diagnostics.Abstractions": "10.0.5",
+          "Microsoft.Extensions.FileProviders.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Logging.Abstractions": "10.0.5"
+        }
+      },
+      "Microsoft.Extensions.Logging.Abstractions": {
+        "type": "Direct",
+        "requested": "[10.0.5, )",
+        "resolved": "10.0.5",
+        "contentHash": "9HOdqlDtPptVcmKAjsQ/Nr5Rxfq6FMYLdhvZh1lVmeKR738qeYecQD7+ldooXf+u2KzzR1kafSphWngIM3C6ug==",
+        "dependencies": {
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "10.0.5"
+        }
+      },
+      "Npgsql": {
+        "type": "Direct",
+        "requested": "[10.0.2, )",
+        "resolved": "10.0.2",
+        "contentHash": "q5RfBI+wywJSFUNDE1L4ZbHEHCFTblo8Uf6A6oe4feOUFYiUQXyAf9GBh5qEZpvJaHiEbpBPkQumjEhXCJxdrg==",
+        "dependencies": {
+          "Microsoft.Extensions.Logging.Abstractions": "10.0.0"
+        }
+      },
       "SecurityCodeScan.VS2019": {
         "type": "Direct",
         "requested": "[5.6.7, )",
         "resolved": "5.6.7",
         "contentHash": "WIE9RJswdSc2j+rLz2gW6U+gMUjMHzY2j7C/CL8/R2olXNM/+twarfMnWqm+rZodDBvaYDApJyxM8mVYf9FGrQ=="
+      },
+      "Microsoft.Extensions.Configuration.Abstractions": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "P09QpTHjqHmCLQOTC+WyLkoRNxek4NIvfWt+TnU0etoDUSRxcltyd6+j/ouRbMdLR0j44GqGO+lhI2M4fAHG4g==",
+        "dependencies": {
+          "Microsoft.Extensions.Primitives": "10.0.5"
+        }
+      },
+      "Microsoft.Extensions.DependencyInjection.Abstractions": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "iVMtq9eRvzyhx8949EGT0OCYJfXi737SbRVzWXE5GrOgGj5AaZ9eUuxA/BSUfmOMALKn/g8KfFaNQw0eiB3lyA=="
+      },
+      "Microsoft.Extensions.Diagnostics.Abstractions": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "/nYGrpa9/0BZofrVpBbbj+Ns8ZesiPE0V/KxsuHgDgHQopIzN54nRaQGSuvPw16/kI9sW1Zox5yyAPqvf0Jz6A==",
+        "dependencies": {
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Options": "10.0.5"
+        }
+      },
+      "Microsoft.Extensions.FileProviders.Abstractions": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "nCBmCx0Xemlu65ZiWMcXbvfvtznKxf4/YYKF9R28QkqdI9lTikedGqzJ28/xmdGGsxUnsP5/3TQGpiPwVjK0dA==",
+        "dependencies": {
+          "Microsoft.Extensions.Primitives": "10.0.5"
+        }
+      },
+      "Microsoft.Extensions.Options": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "MDaQMdUplw0AIRhWWmbLA7yQEXaLIHb+9CTroTiNS8OlI0LMXS4LCxtopqauiqGCWlRgJ+xyraVD8t6veRAFbw==",
+        "dependencies": {
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Primitives": "10.0.5"
+        }
+      },
+      "Microsoft.Extensions.Primitives": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "/HUHJ0tw/LQvD0DZrz50eQy/3z7PfX7WWEaXnjKTV9/TNdcgFlNTZGo49QhS7PTmhDqMyHRMqAXSBxLh0vso4g=="
       }
     }
   }

src/GmRelay.Web/Components/Layout/NavMenu.razor

@@ -34,14 +34,31 @@
                     </svg>
                     Шаблоны
                 </NavLink>
+                <NavLink class="nav-item" href="profile" @onclick="CloseMenu">
+                    <svg class="nav-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+                        <path d="M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2"/>
+                        <circle cx="12" cy="7" r="4"/>
+                    </svg>
+                    Профиль
+                </NavLink>
             </div>
 
             <div class="nav-footer">
                 <div class="nav-user">
                     <div class="nav-user-avatar">
-                        @(context.User.Identity?.Name?.Substring(0, 1).ToUpper() ?? "?")
+                        @if (!string.IsNullOrWhiteSpace(context.User.GetAvatarUrl()))
+                        {
+                            <img src="@context.User.GetAvatarUrl()" alt="" />
+                        }
+                        else
+                        {
+                            @(context.User.Identity?.Name?.Substring(0, 1).ToUpper() ?? "?")
+                        }
+                    </div>
+                    <div class="nav-user-info">
+                        <span class="nav-user-name">@context.User.Identity?.Name</span>
+                        <span class="nav-user-platform">@GetPlatformLabel(context.User)</span>
                     </div>
-                    <span class="nav-user-name">@context.User.Identity?.Name</span>
                 </div>
 
                 <form action="/auth/logout" method="post">
@@ -56,7 +73,7 @@
                     </button>
                 </form>
 
-                <div class="nav-version">v2.4.0</div>
+                <div class="nav-version">v3.0.1</div>
             </div>
         </Authorized>
         <NotAuthorized>
@@ -79,4 +96,7 @@
 
     private void ToggleMenu() => isOpen = !isOpen;
     private void CloseMenu() => isOpen = false;
+
+    private static string GetPlatformLabel(System.Security.Claims.ClaimsPrincipal user) =>
+        user.TryGetDiscordId(out _) ? "Discord" : "Telegram";
 }

src/GmRelay.Web/Components/Pages/CampaignTemplates.razor

@@ -185,7 +185,7 @@
     private Guid selectedGroupId;
     private Guid? deletingTemplateId;
     private bool isCreatingTemplate;
-    private long telegramId;
+    private string? externalUserId;
     private string? errorMessage;
     private string? successMessage;
     private CampaignTemplateEditModel templateModel = new();
@@ -195,13 +195,13 @@
     protected override async Task OnInitializedAsync()
     {
         var authState = await AuthStateProvider.GetAuthenticationStateAsync();
-        if (!authState.User.TryGetTelegramId(out telegramId))
+        if (!authState.User.TryGetPlatformIdentity(out var platform, out externalUserId))
         {
             Navigation.NavigateTo("/access-denied");
             return;
         }
 
-        groups = await SessionService.GetGroupsForGmAsync(telegramId);
+        groups = await SessionService.GetGroupsForCurrentUserAsync();
         selectedGroupId = groups.FirstOrDefault()?.Id ?? Guid.Empty;
 
         if (selectedGroupId != Guid.Empty)
@@ -228,7 +228,7 @@
         campaignTemplates = null;
         campaignTemplateModels = [];
 
-        var templates = await SessionService.GetCampaignTemplatesForGmAsync(selectedGroupId, telegramId);
+        var templates = await SessionService.GetCampaignTemplatesForCurrentUserAsync(selectedGroupId);
         if (templates is null)
         {
             Navigation.NavigateTo("/access-denied");
@@ -260,9 +260,8 @@
 
         try
         {
-            await SessionService.CreateCampaignTemplateForGmAsync(
+            await SessionService.CreateCampaignTemplateForCurrentUserAsync(
                 selectedGroupId,
-                telegramId,
                 new CreateCampaignTemplateRequest(
                     templateModel.Name,
                     templateModel.Title,
@@ -298,7 +297,7 @@
 
         try
         {
-            await SessionService.DeleteCampaignTemplateForGmAsync(template.Id, telegramId);
+            await SessionService.DeleteCampaignTemplateForCurrentUserAsync(template.Id);
             successMessage = "Шаблон кампании удалён.";
             await LoadTemplates();
         }

src/GmRelay.Web/Components/Pages/EditSession.razor

@@ -87,13 +87,13 @@
     protected override async Task OnInitializedAsync()
     {
         var authState = await AuthStateProvider.GetAuthenticationStateAsync();
-        if (!authState.User.TryGetTelegramId(out var telegramId))
+        if (!authState.User.TryGetPlatformIdentity(out var platform, out var externalUserId))
         {
             Navigation.NavigateTo("/access-denied");
             return;
         }
 
-        session = await SessionService.GetSessionForGmAsync(SessionId, telegramId);
+        session = await SessionService.GetSessionForCurrentUserAsync(SessionId);
         if (session is null)
         {
             Navigation.NavigateTo("/access-denied");
@@ -114,7 +114,7 @@
         try
         {
             var authState = await AuthStateProvider.GetAuthenticationStateAsync();
-            if (!authState.User.TryGetTelegramId(out var telegramId))
+            if (!authState.User.TryGetPlatformIdentity(out var platform, out var externalUserId))
             {
                 Navigation.NavigateTo("/access-denied");
                 return;
@@ -122,7 +122,7 @@
 
             var utcTime = new DateTimeOffset(model.ScheduledAtLocal, TimeSpan.FromHours(3)).ToUniversalTime().UtcDateTime;
 
-            await SessionService.UpdateSessionForGmAsync(SessionId, telegramId, model.Title, utcTime, model.JoinLink, model.MaxPlayers);
+            await SessionService.UpdateSessionForCurrentUserAsync(SessionId, model.Title, utcTime, model.JoinLink, model.MaxPlayers);
             Navigation.NavigateTo($"/group/{session!.GroupId}");
         }
         catch (SessionAccessDeniedException)

src/GmRelay.Web/Components/Pages/GroupDetails.razor

@@ -40,8 +40,8 @@
                     </span>
                     @if (groupManagement.CurrentUserIsOwner && manager.Role == GroupManagerRoleExtensions.CoGmValue)
                     {
-                        <button type="button" class="btn-gm btn-gm-outline" style="font-size: 0.75rem; padding: 0.25rem 0.5rem;" disabled="@(removingCoGmId == manager.TelegramId)" @onclick="() => RemoveCoGm(manager.TelegramId)">
+                        <button type="button" class="btn-gm btn-gm-outline" style="font-size: 0.75rem; padding: 0.25rem 0.5rem;" disabled="@(removingCoGmId == manager.ExternalUserId)" @onclick="() => RemoveCoGm(manager.ExternalUserId ?? manager.TelegramId.ToString())">
-                            @(removingCoGmId == manager.TelegramId ? "⏳ Удаляем..." : "Убрать")
+                            @(removingCoGmId == manager.ExternalUserId ? "⏳ Удаляем..." : "Убрать")
                         </button>
                     }
                 }
@@ -403,9 +403,9 @@
     private Guid? promotingSessionId;
     private Guid? processingBatchId;
     private Guid? processingTemplateId;
-    private long? removingCoGmId;
+    private string? removingCoGmId;
     private bool isAddingCoGm;
-    private long telegramId;
+    private string? externalUserId;
     private string? errorMessage;
     private string? successMessage;
     private CoGmEditModel coGmModel = new();
@@ -417,7 +417,7 @@
     protected override async Task OnInitializedAsync()
     {
         var authState = await AuthStateProvider.GetAuthenticationStateAsync();
-        if (!authState.User.TryGetTelegramId(out telegramId))
+        if (!authState.User.TryGetPlatformIdentity(out var platform, out externalUserId))
         {
             Navigation.NavigateTo("/access-denied");
             return;
@@ -428,21 +428,21 @@
 
     private async Task LoadSessions()
     {
-        groupManagement = await SessionService.GetGroupManagementForGmAsync(GroupId, telegramId);
+        groupManagement = await SessionService.GetGroupManagementForCurrentUserAsync(GroupId);
         if (groupManagement is null)
         {
             Navigation.NavigateTo("/access-denied");
             return;
         }
 
-        sessions = await SessionService.GetUpcomingSessionsForGmAsync(GroupId, telegramId);
+        sessions = await SessionService.GetUpcomingSessionsForCurrentUserAsync(GroupId);
         if (sessions is null)
         {
             Navigation.NavigateTo("/access-denied");
             return;
         }
 
-        campaignTemplates = await SessionService.GetCampaignTemplatesForGmAsync(GroupId, telegramId);
+        campaignTemplates = await SessionService.GetCampaignTemplatesForCurrentUserAsync(GroupId);
         if (campaignTemplates is null)
         {
             Navigation.NavigateTo("/access-denied");
@@ -470,8 +470,8 @@
         {
             await SessionService.AddCoGmForOwnerAsync(
                 GroupId,
-                telegramId,
+                "Telegram",
-                coGmModel.TelegramId.Value,
+                coGmModel.TelegramId.Value.ToString(),
                 coGmModel.DisplayName,
                 coGmModel.TelegramUsername);
 
@@ -493,15 +493,15 @@
         }
     }
 
-    private async Task RemoveCoGm(long coGmTelegramId)
+    private async Task RemoveCoGm(string coGmExternalUserId)
     {
         errorMessage = null;
         successMessage = null;
-        removingCoGmId = coGmTelegramId;
+        removingCoGmId = coGmExternalUserId;
 
         try
         {
-            await SessionService.RemoveCoGmForOwnerAsync(GroupId, telegramId, coGmTelegramId);
+            await SessionService.RemoveCoGmForOwnerAsync(GroupId, "Telegram", coGmExternalUserId);
             successMessage = "Co-GM удалён.";
             await LoadSessions();
         }
@@ -527,7 +527,7 @@
 
         try
         {
-            await SessionService.PromoteWaitlistedPlayerForGmAsync(sessionId, telegramId);
+            await SessionService.PromoteWaitlistedPlayerForCurrentUserAsync(sessionId);
             await LoadSessions();
         }
         catch (SessionAccessDeniedException)
@@ -559,7 +559,7 @@
             loadingParticipantsSessionId = sessionId;
             try
             {
-                var participants = await SessionService.GetSessionParticipantsForGmAsync(sessionId, telegramId);
+                var participants = await SessionService.GetSessionParticipantsForCurrentUserAsync(sessionId);
                 participantsCache[sessionId] = participants ?? [];
             }
             catch (Exception ex)
@@ -582,7 +582,7 @@
 
         try
         {
-            await SessionService.RemovePlayerFromSessionForGmAsync(sessionId, telegramId, participantId);
+            await SessionService.RemovePlayerFromSessionForCurrentUserAsync(sessionId, participantId);
             participantsCache.Remove(sessionId);
             successMessage = "Игрок исключён.";
             await LoadSessions();
@@ -658,10 +658,9 @@
 
         try
         {
-            await SessionService.UpdateBatchDetailsForGmAsync(batch.BatchId, telegramId, batch.Title, batch.JoinLink);
+            await SessionService.UpdateBatchDetailsForCurrentUserAsync(batch.BatchId, batch.Title, batch.JoinLink);
-            await SessionService.UpdateBatchNotificationModeForGmAsync(
+            await SessionService.UpdateBatchNotificationModeForCurrentUserAsync(
                 batch.BatchId,
-                telegramId,
                 SessionNotificationModeExtensions.FromDatabaseValue(batch.NotificationMode));
             successMessage = "Настройки batch обновлены.";
             await LoadSessions();
@@ -696,7 +695,7 @@
         try
         {
             var utcTime = new DateTimeOffset(batch.FirstScheduledAtLocal, TimeSpan.FromHours(3)).ToUniversalTime().UtcDateTime;
-            await SessionService.RescheduleBatchForGmAsync(batch.BatchId, telegramId, utcTime, batch.IntervalDays);
+            await SessionService.RescheduleBatchForCurrentUserAsync(batch.BatchId, utcTime, batch.IntervalDays);
             successMessage = "Расписание пачки обновлено.";
             await LoadSessions();
         }
@@ -726,7 +725,7 @@
                 ? BatchCloneInterval.NextMonth
                 : BatchCloneInterval.NextWeek;
 
-            var clonedBatch = await SessionService.CloneBatchForGmAsync(batch.BatchId, telegramId, interval);
+            var clonedBatch = await SessionService.CloneBatchForCurrentUserAsync(batch.BatchId, interval);
             successMessage = $"Пачка склонирована: {clonedBatch.SessionCount} игр.";
             await LoadSessions();
         }
@@ -759,7 +758,7 @@
                 return;
             }
 
-            var createdBatch = await SessionService.CreateBatchFromCampaignTemplateForGmAsync(template.Id, telegramId, utcTime);
+            var createdBatch = await SessionService.CreateBatchFromCampaignTemplateForCurrentUserAsync(template.Id, utcTime);
             successMessage = $"Batch создан из шаблона: {createdBatch.SessionCount} игр.";
             await LoadSessions();
         }
@@ -836,7 +835,7 @@
     private bool IsTemplateBusy(CampaignTemplateUsageModel template) => processingTemplateId == template.Id;
 
     private string CurrentUserRole =>
-        groupManagement?.Managers.FirstOrDefault(manager => manager.TelegramId == telegramId)?.Role
+        groupManagement?.Managers.FirstOrDefault(manager => manager.ExternalUserId == externalUserId)?.Role
         ?? GroupManagerRoleExtensions.CoGmValue;
 
     private static string FormatRole(string role) =>

src/GmRelay.Web/Components/Pages/GroupStats.razor

@@ -5,7 +5,7 @@
 @using Microsoft.AspNetCore.Components.Authorization
 @using System.Security.Claims
 @attribute [Authorize]
-@inject ISessionStore SessionStore
+@inject AuthorizedSessionService SessionService
 @inject AuthenticationStateProvider AuthStateProvider
 @inject NavigationManager Navigation
 
@@ -85,9 +85,9 @@
                                 <td>
                                     <div class="player-info">
                                         <span class="player-name">@s.DisplayName</span>
-                                        @if (!string.IsNullOrEmpty(s.TelegramUsername))
+                                        @if (!string.IsNullOrEmpty(s.ExternalUsername))
                                         {
-                                            <span class="player-username">@@@s.TelegramUsername</span>
+                                            <span class="player-username">@@@s.ExternalUsername</span>
                                         }
                                     </div>
                                 </td>
@@ -171,21 +171,20 @@
             Navigation.NavigateTo("/login");
             return;
         }
-        var telegramIdClaim = user.FindFirst("telegram_id")?.Value
+        if (!user.TryGetPlatformIdentity(out var platform, out var externalUserId))
-            ?? user.FindFirst(ClaimTypes.NameIdentifier)?.Value;
-        if (!long.TryParse(telegramIdClaim, out var telegramId))
         {
             Navigation.NavigateTo("/login");
             return;
         }
         try
         {
-            if (!await SessionStore.IsGroupManagerAsync(GroupId, telegramId))
+            var groupManagement = await SessionService.GetGroupManagementForCurrentUserAsync(GroupId);
+            if (groupManagement is null)
             {
                 Navigation.NavigateTo("/access-denied");
                 return;
             }
-            stats = await SessionStore.GetGroupAttendanceStatsAsync(GroupId) ?? new();
+            stats = await SessionService.GetGroupAttendanceStatsForCurrentUserAsync(GroupId) ?? new();
             UpdateSortedStats();
         }
         catch (Exception ex)

src/GmRelay.Web/Components/Pages/Home.razor

@@ -43,7 +43,7 @@
                 <div class="glass-card group-card">
                     <div class="group-card-icon">🎮</div>
                     <h3 class="group-card-title">@group.Name</h3>
-                    <p class="group-card-id">ID: @group.TelegramChatId</p>
+                    <p class="group-card-id">ID: @(group.Platform == "Discord" ? group.ExternalGroupId : group.TelegramChatId.ToString())</p>
                     <span class="status-badge @(group.ManagerRole == GroupManagerRoleExtensions.OwnerValue ? "status-success" : "status-info")" style="align-self: flex-start; margin-bottom: 1rem;">
                         @FormatRole(group.ManagerRole)
                     </span>
@@ -93,13 +93,13 @@
         var user = authState.User;
         userName = user.Identity?.Name ?? "Мастер Игры";
 
-        if (!user.TryGetTelegramId(out var telegramId))
+        if (!user.TryGetPlatformIdentity(out _, out _))
         {
             Navigation.NavigateTo("/access-denied");
             return;
         }
 
-        groups = await SessionService.GetGroupsForGmAsync(telegramId);
+        groups = await SessionService.GetGroupsForCurrentUserAsync();
     }
 
     private static string FormatRole(string role) =>

src/GmRelay.Web/Components/Pages/Login.razor

@@ -10,7 +10,7 @@
     <div class="login-card">
         <img src="logo.png" alt="GM-Relay" class="login-logo" />
         <h1 class="login-title">GM-Relay</h1>
-        <p class="login-subtitle">Войдите через Telegram для управления игровыми сессиями</p>
+        <p class="login-subtitle">Войдите для управления игровыми сессиями</p>
 
         @if (Navigation.Uri.Contains("error=auth_failed"))
         {
@@ -20,6 +20,17 @@
         }
 
         <div id="telegram-login-container"></div>
+
+        <div class="login-divider">
+            <span>или</span>
+        </div>
+
+        <a href="/auth/discord" class="login-btn login-btn-discord">
+            <svg class="login-btn-icon" viewBox="0 0 24 24" fill="currentColor">
+                <path d="M20.317 4.37a19.791 19.791 0 0 0-4.885-1.515.074.074 0 0 0-.079.037c-.21.375-.444.864-.608 1.25a18.27 18.27 0 0 0-5.487 0 12.64 12.64 0 0 0-.617-1.25.077.077 0 0 0-.079-.037A19.736 19.736 0 0 0 3.677 4.37a.07.07 0 0 0-.032.027C.533 9.046-.32 13.58.099 18.057a.082.082 0 0 0 .031.057 19.9 19.9 0 0 0 5.993 3.03.078.078 0 0 0 .084-.028 14.09 14.09 0 0 0 1.226-1.994.076.076 0 0 0-.041-.106 13.107 13.107 0 0 1-1.872-.892.077.077 0 0 1-.008-.128 10.2 10.2 0 0 0 .372-.292.074.074 0 0 1 .077-.01c3.928 1.793 8.18 1.793 12.062 0a.074.074 0 0 1 .078.01c.12.098.246.198.373.292a.077.077 0 0 1-.006.127 12.299 12.299 0 0 1-1.873.892.077.077 0 0 0-.041.107c.36.698.772 1.362 1.225 1.993a.076.076 0 0 0 .084.028 19.839 19.839 0 0 0 6.002-3.03.077.077 0 0 0 .032-.054c.5-5.177-.838-9.674-3.549-13.66a.061.061 0 0 0-.031-.03zM8.02 15.33c-1.183 0-2.157-1.085-2.157-2.419 0-1.333.956-2.419 2.157-2.419 1.21 0 2.176 1.086 2.157 2.42 0 1.333-.956 2.418-2.157 2.418zm7.975 0c-1.183 0-2.157-1.085-2.157-2.419 0-1.333.955-2.419 2.157-2.419 1.21 0 2.176 1.086 2.157 2.42 0 1.333-.946 2.418-2.157 2.418z"/>
+            </svg>
+            Войти через Discord
+        </a>
     </div>
 </div>
 

src/GmRelay.Web/Components/Pages/Profile.razor

@@ -0,0 +1,191 @@
+@page "/profile"
+@using Microsoft.AspNetCore.Authorization
+@using Microsoft.AspNetCore.Components.Authorization
+@using Microsoft.Extensions.Configuration
+@attribute [Authorize]
+@inject ISessionStore SessionStore
+@inject IConfiguration Configuration
+@inject NavigationManager Navigation
+
+<PageTitle>Профиль — GM-Relay</PageTitle>
+
+<div class="profile-container">
+    <h1 class="page-title">Профиль</h1>
+
+    @if (identities is null)
+    {
+        <p class="loading-text">Загрузка...</p>
+    }
+    else if (identities.Count == 0)
+    {
+        <div class="profile-card">
+            <p>Связанные аккаунты не найдены.</p>
+        </div>
+    }
+    else
+    {
+        <div class="profile-card">
+            <h2 class="section-title">Связанные аккаунты</h2>
+            <ul class="identity-list">
+                @foreach (var id in identities)
+                {
+                    <li class="identity-item">
+                        <div class="identity-info">
+                            <span class="identity-platform">@id.Platform</span>
+                            <span class="identity-name">@id.DisplayName</span>
+                        </div>
+                        @if (id.Platform != currentPlatform || id.ExternalUserId != currentExternalUserId)
+                        {
+                            <button class="btn btn-secondary btn-small"
+                                    @onclick="() => Unlink(id.Platform, id.ExternalUserId)"
+                                    disabled="@isUnlinking">
+                                Отвязать
+                            </button>
+                        }
+                        else
+                        {
+                            <span class="identity-badge">Текущий</span>
+                        }
+                    </li>
+                }
+            </ul>
+        </div>
+    }
+
+    <div class="profile-card">
+        <h2 class="section-title">Добавить аккаунт</h2>
+        @if (!HasLinkedPlatform("Discord"))
+        {
+            <a href="/auth/discord" class="btn btn-primary">
+                Привязать Discord
+            </a>
+        }
+        else
+        {
+            <p class="muted-text">Discord уже привязан.</p>
+        }
+
+        @if (currentPlatform == "Discord" && !HasLinkedPlatform("Telegram"))
+        {
+            var botUsername = Configuration["Telegram__BotUsername"] ?? Configuration["Telegram:BotUsername"];
+            if (!string.IsNullOrWhiteSpace(botUsername))
+            {
+                var authUrl = new Uri(new Uri(Navigation.BaseUri), "auth/telegram").ToString();
+                var widgetHtml = $"<script async src=\"https://telegram.org/js/telegram-widget.js?22\" data-telegram-login=\"{botUsername}\" data-size=\"large\" data-auth-url=\"{authUrl}\" data-request-access=\"write\"></script>";
+                <div class="telegram-widget-wrapper">
+                    @((MarkupString)widgetHtml)
+                </div>
+            }
+        }
+    </div>
+
+    @if (!string.IsNullOrWhiteSpace(errorMessage))
+    {
+        <div class="alert alert-error">@errorMessage</div>
+    }
+
+    @if (!string.IsNullOrWhiteSpace(successMessage))
+    {
+        <div class="alert alert-success">@successMessage</div>
+    }
+</div>
+
+@code {
+    private List<LinkedIdentity>? identities;
+    private string? currentPlatform;
+    private string? currentExternalUserId;
+    private bool isUnlinking;
+    private string? errorMessage;
+    private string? successMessage;
+
+    [CascadingParameter]
+    private Task<AuthenticationState>? AuthenticationStateTask { get; set; }
+
+    [SupplyParameterFromQuery]
+    public string? Linked { get; set; }
+
+    [SupplyParameterFromQuery(Name = "link_error")]
+    public string? LinkError { get; set; }
+
+    protected override async Task OnInitializedAsync()
+    {
+        if (AuthenticationStateTask is not null)
+        {
+            var authState = await AuthenticationStateTask;
+            var user = authState.User;
+            if (user.TryGetPlatformIdentity(out var plat, out var extId))
+            {
+                currentPlatform = plat;
+                currentExternalUserId = extId;
+            }
+        }
+
+        if (!string.IsNullOrWhiteSpace(Linked))
+        {
+            successMessage = $"{Linked} аккаунт успешно привязан!";
+        }
+
+        if (!string.IsNullOrWhiteSpace(LinkError))
+        {
+            errorMessage = $"Ошибка привязки: {Uri.UnescapeDataString(LinkError)}";
+        }
+
+        await LoadIdentities();
+    }
+
+    private async Task LoadIdentities()
+    {
+        try
+        {
+            if (currentPlatform is not null && currentExternalUserId is not null)
+            {
+                identities = await SessionStore.GetLinkedIdentitiesAsync(currentPlatform, currentExternalUserId);
+            }
+            else
+            {
+                identities = [];
+            }
+        }
+        catch (Exception ex)
+        {
+            errorMessage = $"Не удалось загрузить аккаунты: {ex.Message}";
+        }
+    }
+
+    private bool HasLinkedPlatform(string platform)
+    {
+        return identities?.Any(i => i.Platform == platform) ?? false;
+    }
+
+    private async Task Unlink(string platform, string externalUserId)
+    {
+        isUnlinking = true;
+        errorMessage = null;
+        successMessage = null;
+
+        try
+        {
+            if (currentPlatform is null || currentExternalUserId is null)
+            {
+                errorMessage = "Не удалось определить текущего пользователя.";
+                return;
+            }
+
+            await SessionStore.UnlinkIdentityAsync(currentPlatform, currentExternalUserId, platform, externalUserId);
+            successMessage = $"{platform} аккаунт отвязан.";
+            await LoadIdentities();
+        }
+        catch (InvalidOperationException ex)
+        {
+            errorMessage = $"Ошибка отвязки: {ex.Message}";
+        }
+        catch (Exception ex)
+        {
+            errorMessage = $"Ошибка отвязки: {ex.Message}";
+        }
+        finally
+        {
+            isUnlinking = false;
+        }
+    }
+}

src/GmRelay.Web/Components/Pages/SessionHistory.razor

@@ -56,7 +56,7 @@
                         {
                             <tr>
                                 <td>@entry.ChangedAt.ToString("dd.MM.yyyy HH:mm") UTC</td>
-                                <td>@entry.ActorName (@entry.ActorTelegramId)</td>
+                                <td>@entry.ActorName (@entry.ActorExternalUserId)</td>
                                 <td>
                                     <span class="status-badge @(GetBadgeClass(entry.ChangeType))">
                                         @GetChangeTypeLabel(entry.ChangeType)
@@ -82,13 +82,13 @@
     protected override async Task OnInitializedAsync()
     {
         var authState = await AuthStateProvider.GetAuthenticationStateAsync();
-        if (!authState.User.TryGetTelegramId(out var telegramId))
+        if (!authState.User.TryGetPlatformIdentity(out var platform, out var externalUserId))
         {
             Navigation.NavigateTo("/access-denied");
             return;
         }
 
-        var session = await SessionService.GetSessionForGmAsync(SessionId, telegramId);
+        var session = await SessionService.GetSessionForCurrentUserAsync(SessionId);
         if (session is null)
         {
             Navigation.NavigateTo("/access-denied");
@@ -97,7 +97,7 @@
 
         sessionTitle = session.Title;
         groupId = session.GroupId;
-        entries = await SessionService.GetSessionHistoryForGmAsync(SessionId, telegramId);
+        entries = await SessionService.GetSessionHistoryForCurrentUserAsync(SessionId);
     }
 
     private string GetChangeTypeLabel(string changeType) => changeType switch

src/GmRelay.Web/DiscordOAuthOptions.cs

@@ -0,0 +1,19 @@
+namespace GmRelay.Web;
+
+public sealed class DiscordOAuthOptions
+{
+    public string ClientId { get; set; } = string.Empty;
+    public string ClientSecret { get; set; } = string.Empty;
+    public string RedirectUri { get; set; } = string.Empty;
+    public string[] Scopes { get; set; } = ["identify", "guilds"];
+
+    public void Validate()
+    {
+        if (string.IsNullOrWhiteSpace(ClientId))
+            throw new InvalidOperationException("Discord:ClientId is required.");
+        if (string.IsNullOrWhiteSpace(ClientSecret))
+            throw new InvalidOperationException("Discord:ClientSecret is required.");
+        if (string.IsNullOrWhiteSpace(RedirectUri))
+            throw new InvalidOperationException("Discord:RedirectUri is required.");
+    }
+}

src/GmRelay.Web/Program.cs

@@ -1,3 +1,4 @@
+using GmRelay.Web;
 using GmRelay.Web.Components;
 using GmRelay.Web.Health;
 using GmRelay.Web.Services;
@@ -7,6 +8,7 @@ using Microsoft.AspNetCore.DataProtection;
 using Microsoft.AspNetCore.Diagnostics.HealthChecks;
 using Microsoft.Extensions.Diagnostics.HealthChecks;
 using System.Security.Claims;
+using System.Security.Cryptography;
 using System.Text.Json;
 using Telegram.Bot;
 using Npgsql;
@@ -16,6 +18,12 @@ var builder = WebApplication.CreateBuilder(args);
 // Add Aspire service defaults
 builder.AddServiceDefaults();
 
+// Add HttpClient
+builder.Services.AddHttpClient();
+
+// Add HttpContextAccessor for platform-agnostic identity resolution
+builder.Services.AddHttpContextAccessor();
+
 // Add health checks
 builder.Services.AddHealthChecks()
     .AddCheck<NpgsqlHealthCheck>("npgsql");
@@ -29,6 +37,9 @@ builder.AddNpgsqlDataSource("gmrelaydb");
 
 // Add Services
 builder.Services.AddSingleton<TelegramAuthService>();
+builder.Services.Configure<DiscordOAuthOptions>(builder.Configuration.GetSection("Discord"));
+builder.Services.AddSingleton<DiscordAuthService>();
+builder.Services.AddSingleton<DiscordOAuthStateStore>();
 builder.Services.AddSingleton<ISessionStore, SessionService>();
 builder.Services.AddScoped<AuthorizedSessionService>();
 builder.Services.AddScoped<CalendarSubscriptionService>();
@@ -50,7 +61,7 @@ builder.Services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationSc
         options.AccessDeniedPath = "/access-denied";
         options.Cookie.HttpOnly = true;
         options.Cookie.SecurePolicy = CookieSecurePolicy.Always;
-        options.Cookie.SameSite = SameSiteMode.Strict;
+        options.Cookie.SameSite = SameSiteMode.Lax;
         options.ExpireTimeSpan = TimeSpan.FromDays(7);
         options.SlidingExpiration = true;
     });
@@ -112,19 +123,39 @@ app.MapHealthChecks("/alive", new HealthCheckOptions
 });
 
 // Endpoint to handle Telegram Login callback
-app.MapGet("/auth/telegram", async (HttpContext context, TelegramAuthService authService) =>
+app.MapGet("/auth/telegram", async (HttpContext context, TelegramAuthService authService, ISessionStore sessionStore) =>
 {
-    if (authService.Verify(context.Request.Query, out var telegramId, out var name))
+    if (!authService.Verify(context.Request.Query, out var telegramId, out var name))
+        return Results.Redirect("/login?error=auth_failed");
+
+    await sessionStore.UpsertPlayerAsync("Telegram", telegramId.ToString(System.Globalization.CultureInfo.InvariantCulture), name, null);
+
+    // If already authenticated via another platform, link instead of replacing session
+    if (context.User.Identity?.IsAuthenticated == true
+        && context.User.TryGetPlatformIdentity(out var currentPlatform, out var currentExternalUserId)
+        && currentPlatform != "Telegram")
     {
-        var authProperties = new AuthenticationProperties { IsPersistent = true };
+        try
-        await context.SignInAsync(
+        {
-            CookieAuthenticationDefaults.AuthenticationScheme,
+            // Always make Telegram the primary (it has the historical data/groups)
-            CreateTelegramPrincipal(telegramId, name),
+            await sessionStore.LinkIdentityAsync(
-            authProperties);
+                "Telegram", telegramId.ToString(System.Globalization.CultureInfo.InvariantCulture),
-        return Results.Redirect("/");
+                currentPlatform, currentExternalUserId,
+                name);
+            return Results.Redirect("/profile?linked=telegram");
+        }
+        catch (InvalidOperationException ex)
+        {
+            return Results.Redirect($"/profile?link_error={Uri.EscapeDataString(ex.Message)}");
+        }
     }
 
-    return Results.Redirect("/login?error=auth_failed");
+    var authProperties = new AuthenticationProperties { IsPersistent = true };
+    await context.SignInAsync(
+        CookieAuthenticationDefaults.AuthenticationScheme,
+        CreateTelegramPrincipal(telegramId, name),
+        authProperties);
+    return Results.Redirect("/");
 });
 
 app.MapPost("/auth/telegram-webapp", async (
@@ -174,6 +205,96 @@ app.MapPost("/auth/logout", async (HttpContext context) =>
     return Results.Redirect("/");
 });
 
+// Discord OAuth endpoints
+app.MapGet("/auth/discord", (DiscordAuthService discordAuth, DiscordOAuthStateStore stateStore) =>
+{
+    var state = stateStore.CreateState();
+    var url = discordAuth.BuildAuthorizeUrl(state);
+    return Results.Redirect(url);
+});
+
+app.MapGet("/auth/discord/callback", async (
+    HttpContext context,
+    DiscordAuthService discordAuth,
+    DiscordOAuthStateStore stateStore,
+    ISessionStore sessionStore) =>
+{
+    var code = context.Request.Query["code"].ToString();
+    var state = context.Request.Query["state"].ToString();
+
+    if (string.IsNullOrWhiteSpace(code) ||
+        string.IsNullOrWhiteSpace(state) ||
+        !stateStore.ValidateAndRemove(state))
+    {
+        return Results.Redirect("/login?error=auth_failed");
+    }
+
+    var user = await discordAuth.ExchangeCodeAsync(code);
+    if (user is null)
+        return Results.Redirect("/login?error=auth_failed");
+
+    await sessionStore.UpsertDiscordUserAsync(user.Id, user.DisplayName, user.AvatarUrl);
+
+    // If already authenticated via another platform, link instead of replacing session
+    if (context.User.Identity?.IsAuthenticated == true
+        && context.User.TryGetPlatformIdentity(out var currentPlatform, out var currentExternalUserId)
+        && currentPlatform != "Discord")
+    {
+        try
+        {
+            await sessionStore.LinkIdentityAsync(
+                currentPlatform, currentExternalUserId,
+                "Discord", user.Id,
+                user.DisplayName);
+            return Results.Redirect("/profile?linked=discord");
+        }
+        catch (InvalidOperationException ex)
+        {
+            return Results.Redirect($"/profile?link_error={Uri.EscapeDataString(ex.Message)}");
+        }
+    }
+
+    var authProperties = new AuthenticationProperties { IsPersistent = true };
+    await context.SignInAsync(
+        CookieAuthenticationDefaults.AuthenticationScheme,
+        CreateDiscordPrincipal(user.Id, user.DisplayName, user.AvatarUrl),
+        authProperties);
+
+    return Results.Redirect("/");
+});
+
+// Identity linking API endpoints
+app.MapGet("/api/me/identities", async (
+    HttpContext context,
+    ISessionStore sessionStore) =>
+{
+    if (!context.User.TryGetPlatformIdentity(out var platform, out var externalUserId))
+        return Results.Unauthorized();
+
+    var identities = await sessionStore.GetLinkedIdentitiesAsync(platform, externalUserId);
+    return Results.Ok(identities);
+}).RequireAuthorization();
+
+app.MapDelete("/api/me/identities/{targetPlatform}/{targetExternalUserId}", async (
+    HttpContext context,
+    ISessionStore sessionStore,
+    string targetPlatform,
+    string targetExternalUserId) =>
+{
+    if (!context.User.TryGetPlatformIdentity(out var platform, out var externalUserId))
+        return Results.Unauthorized();
+
+    try
+    {
+        await sessionStore.UnlinkIdentityAsync(platform, externalUserId, targetPlatform, targetExternalUserId);
+        return Results.NoContent();
+    }
+    catch (InvalidOperationException ex)
+    {
+        return Results.BadRequest(new { error = ex.Message });
+    }
+}).RequireAuthorization();
+
 // Public calendar subscription endpoint (no auth required)
 app.MapGet("/calendar/{token}.ics", async (
     string token,
@@ -200,11 +321,29 @@ static ClaimsPrincipal CreateTelegramPrincipal(long telegramId, string name)
     {
         new(ClaimTypes.NameIdentifier, telegramId.ToString(System.Globalization.CultureInfo.InvariantCulture)),
         new(ClaimTypes.Name, name),
-        new("TelegramId", telegramId.ToString(System.Globalization.CultureInfo.InvariantCulture))
+        new("TelegramId", telegramId.ToString(System.Globalization.CultureInfo.InvariantCulture)),
+        new("Platform", "Telegram")
     };
 
     var claimsIdentity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
     return new ClaimsPrincipal(claimsIdentity);
 }
 
+static ClaimsPrincipal CreateDiscordPrincipal(string discordId, string name, string? avatarUrl)
+{
+    var claims = new List<Claim>
+    {
+        new(ClaimTypes.NameIdentifier, discordId),
+        new(ClaimTypes.Name, name),
+        new("DiscordId", discordId),
+        new("Platform", "Discord")
+    };
+
+    if (!string.IsNullOrWhiteSpace(avatarUrl))
+        claims.Add(new Claim("AvatarUrl", avatarUrl));
+
+    var claimsIdentity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
+    return new ClaimsPrincipal(claimsIdentity);
+}
+
 public sealed record TelegramWebAppAuthRequest(string InitData);

src/GmRelay.Web/Services/AuthorizedSessionService.cs

@@ -1,182 +1,237 @@
+using System.Security.Claims;
 using GmRelay.Shared.Domain;
 
 namespace GmRelay.Web.Services;
 
-public sealed class AuthorizedSessionService(ISessionStore sessionStore)
+public sealed class AuthorizedSessionService(ISessionStore sessionStore, IHttpContextAccessor httpContextAccessor)
 {
-    public Task<List<WebGameGroup>> GetGroupsForGmAsync(long gmId) =>
+    private (string Platform, string ExternalUserId, string Name)? GetCurrentIdentity()
-        sessionStore.GetGroupsForGmAsync(gmId);
-
-    public async Task<WebGroupManagement?> GetGroupManagementForGmAsync(Guid groupId, long gmId)
     {
-        if (!await GroupBelongsToGmAsync(groupId, gmId))
+        var user = httpContextAccessor.HttpContext?.User;
-        {
+        if (user is null || !user.TryGetPlatformIdentity(out var platform, out var externalUserId))
+            return null;
+
+        var name = user.FindFirst(ClaimTypes.Name)?.Value ?? externalUserId;
+        return (platform, externalUserId, name);
+    }
+
+    public Task<List<WebGameGroup>> GetGroupsForCurrentUserAsync()
+    {
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            return Task.FromResult(new List<WebGameGroup>());
+
+        return sessionStore.GetGroupsForUserAsync(identity.Value.Platform, identity.Value.ExternalUserId);
+    }
+
+    public async Task<WebGroupManagement?> GetGroupManagementForCurrentUserAsync(Guid groupId)
+    {
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            return null;
+
+        if (!await sessionStore.IsGroupManagerAsync(groupId, identity.Value.Platform, identity.Value.ExternalUserId))
             return null;
-        }
 
         var group = await sessionStore.GetGroupAsync(groupId);
         if (group is null)
-        {
             return null;
-        }
 
         var managers = await sessionStore.GetGroupManagersAsync(groupId);
-        var isOwner = await sessionStore.IsGroupOwnerAsync(groupId, gmId);
+        var isOwner = await sessionStore.IsGroupOwnerAsync(groupId, identity.Value.Platform, identity.Value.ExternalUserId);
         return new WebGroupManagement(group, managers, isOwner);
     }
 
-    public async Task<List<WebSession>?> GetUpcomingSessionsForGmAsync(Guid groupId, long gmId)
+    public async Task<List<WebSession>?> GetUpcomingSessionsForCurrentUserAsync(Guid groupId)
     {
-        if (!await GroupBelongsToGmAsync(groupId, gmId))
+        var identity = GetCurrentIdentity();
-        {
+        if (identity is null)
+            return null;
+
+        if (!await sessionStore.IsGroupManagerAsync(groupId, identity.Value.Platform, identity.Value.ExternalUserId))
             return null;
-        }
 
         return await sessionStore.GetUpcomingSessionsAsync(groupId);
     }
 
-    public async Task<WebSession?> GetSessionForGmAsync(Guid sessionId, long gmId)
+    public async Task<WebSession?> GetSessionForCurrentUserAsync(Guid sessionId)
     {
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            return null;
+
         var session = await sessionStore.GetSessionAsync(sessionId);
         if (session is null)
-        {
             return null;
-        }
 
-        return await GroupBelongsToGmAsync(session.GroupId, gmId) ? session : null;
+        return await sessionStore.IsGroupManagerAsync(session.GroupId, identity.Value.Platform, identity.Value.ExternalUserId) ? session : null;
     }
 
-    public async Task<WebSessionBatch?> GetBatchForGmAsync(Guid batchId, long gmId)
+    public async Task<WebSessionBatch?> GetBatchForCurrentUserAsync(Guid batchId)
     {
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            return null;
+
         var batch = await sessionStore.GetBatchAsync(batchId);
         if (batch is null)
-        {
             return null;
-        }
 
-        return await GroupBelongsToGmAsync(batch.GroupId, gmId) ? batch : null;
+        return await sessionStore.IsGroupManagerAsync(batch.GroupId, identity.Value.Platform, identity.Value.ExternalUserId) ? batch : null;
     }
 
-    public async Task UpdateSessionForGmAsync(Guid sessionId, long gmId, string title, DateTime scheduledAt, string joinLink, int? maxPlayers)
+    public async Task UpdateSessionForCurrentUserAsync(Guid sessionId, string title, DateTime scheduledAt, string joinLink, int? maxPlayers)
     {
-        var session = await GetSessionForGmAsync(sessionId, gmId);
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
+        var session = await GetSessionForCurrentUserAsync(sessionId);
         if (session is null)
         {
-            throw new SessionAccessDeniedException(sessionId, gmId);
+            throw new SessionAccessDeniedException(sessionId, identity.Value.ExternalUserId);
         }
 
         await sessionStore.UpdateSessionAsync(sessionId, session.GroupId, title, scheduledAt, joinLink, maxPlayers);
 
         if (session.Title != title)
-            await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "Title", session.Title, title);
+            await sessionStore.LogSessionChangeAsync(sessionId, identity.Value.ExternalUserId, identity.Value.Name, "Title", session.Title, title);
         if (session.ScheduledAt != scheduledAt)
-            await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "Time", session.ScheduledAt.ToString("O"), scheduledAt.ToString("O"));
+            await sessionStore.LogSessionChangeAsync(sessionId, identity.Value.ExternalUserId, identity.Value.Name, "Time", session.ScheduledAt.ToString("O"), scheduledAt.ToString("O"));
         if (session.JoinLink != joinLink)
-            await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "Link", session.JoinLink, joinLink);
+            await sessionStore.LogSessionChangeAsync(sessionId, identity.Value.ExternalUserId, identity.Value.Name, "Link", session.JoinLink, joinLink);
         if (session.MaxPlayers != maxPlayers)
-            await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "MaxPlayers", session.MaxPlayers?.ToString(), maxPlayers?.ToString());
+            await sessionStore.LogSessionChangeAsync(sessionId, identity.Value.ExternalUserId, identity.Value.Name, "MaxPlayers", session.MaxPlayers?.ToString(), maxPlayers?.ToString());
     }
 
-    public async Task PromoteWaitlistedPlayerForGmAsync(Guid sessionId, long gmId)
+    public async Task PromoteWaitlistedPlayerForCurrentUserAsync(Guid sessionId)
     {
-        var session = await GetSessionForGmAsync(sessionId, gmId);
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
+        var session = await GetSessionForCurrentUserAsync(sessionId);
         if (session is null)
         {
-            throw new SessionAccessDeniedException(sessionId, gmId);
+            throw new SessionAccessDeniedException(sessionId, identity.Value.ExternalUserId);
         }
 
         await sessionStore.PromoteWaitlistedPlayerAsync(sessionId, session.GroupId);
-        await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "WaitlistPromote", null, null);
+        await sessionStore.LogSessionChangeAsync(sessionId, identity.Value.ExternalUserId, identity.Value.Name, "WaitlistPromote", null, null);
     }
 
-    public async Task UpdateBatchDetailsForGmAsync(Guid batchId, long gmId, string title, string joinLink)
+    public async Task UpdateBatchDetailsForCurrentUserAsync(Guid batchId, string title, string joinLink)
     {
-        var batch = await GetBatchForGmAsync(batchId, gmId);
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
+        var batch = await GetBatchForCurrentUserAsync(batchId);
         if (batch is null)
         {
-            throw new SessionAccessDeniedException(batchId, gmId);
+            throw new SessionAccessDeniedException(batchId, identity.Value.ExternalUserId);
         }
 
         await sessionStore.UpdateBatchDetailsAsync(batchId, batch.GroupId, title.Trim(), joinLink.Trim());
     }
 
-    public async Task UpdateBatchNotificationModeForGmAsync(Guid batchId, long gmId, SessionNotificationMode notificationMode)
+    public async Task UpdateBatchNotificationModeForCurrentUserAsync(Guid batchId, SessionNotificationMode notificationMode)
     {
-        var batch = await GetBatchForGmAsync(batchId, gmId);
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
+        var batch = await GetBatchForCurrentUserAsync(batchId);
         if (batch is null)
         {
-            throw new SessionAccessDeniedException(batchId, gmId);
+            throw new SessionAccessDeniedException(batchId, identity.Value.ExternalUserId);
         }
 
         await sessionStore.UpdateBatchNotificationModeAsync(batchId, batch.GroupId, notificationMode);
     }
 
-    public async Task RescheduleBatchForGmAsync(Guid batchId, long gmId, DateTime firstScheduledAt, int intervalDays)
+    public async Task RescheduleBatchForCurrentUserAsync(Guid batchId, DateTime firstScheduledAt, int intervalDays)
     {
         if (intervalDays <= 0)
         {
             throw new ArgumentOutOfRangeException(nameof(intervalDays), intervalDays, "Interval must be greater than zero.");
         }
 
-        var batch = await GetBatchForGmAsync(batchId, gmId);
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
+        var batch = await GetBatchForCurrentUserAsync(batchId);
         if (batch is null)
         {
-            throw new SessionAccessDeniedException(batchId, gmId);
+            throw new SessionAccessDeniedException(batchId, identity.Value.ExternalUserId);
         }
 
         await sessionStore.RescheduleBatchAsync(batchId, batch.GroupId, firstScheduledAt, intervalDays);
-        await sessionStore.LogSessionChangeAsync(batchId, gmId, "ГМ", "BatchRescheduled", batch.FirstScheduledAt.ToString("O"), firstScheduledAt.ToString("O"));
+        await sessionStore.LogSessionChangeAsync(batchId, identity.Value.ExternalUserId, identity.Value.Name, "BatchRescheduled", batch.FirstScheduledAt.ToString("O"), firstScheduledAt.ToString("O"));
     }
 
-    public async Task<WebSessionBatch> CloneBatchForGmAsync(Guid batchId, long gmId, BatchCloneInterval interval)
+    public async Task<WebSessionBatch> CloneBatchForCurrentUserAsync(Guid batchId, BatchCloneInterval interval)
     {
-        var batch = await GetBatchForGmAsync(batchId, gmId);
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
+        var batch = await GetBatchForCurrentUserAsync(batchId);
         if (batch is null)
         {
-            throw new SessionAccessDeniedException(batchId, gmId);
+            throw new SessionAccessDeniedException(batchId, identity.Value.ExternalUserId);
         }
 
         return await sessionStore.CloneBatchAsync(batchId, batch.GroupId, interval);
     }
 
-    public async Task<List<WebCampaignTemplate>?> GetCampaignTemplatesForGmAsync(Guid groupId, long gmId)
+    public async Task<List<WebCampaignTemplate>?> GetCampaignTemplatesForCurrentUserAsync(Guid groupId)
     {
-        if (!await GroupBelongsToGmAsync(groupId, gmId))
+        var identity = GetCurrentIdentity();
-        {
+        if (identity is null)
+            return null;
+
+        if (!await sessionStore.IsGroupManagerAsync(groupId, identity.Value.Platform, identity.Value.ExternalUserId))
             return null;
-        }
 
         return await sessionStore.GetCampaignTemplatesAsync(groupId);
     }
 
-    public async Task<WebCampaignTemplate> CreateCampaignTemplateForGmAsync(
+    public async Task<WebCampaignTemplate> CreateCampaignTemplateForCurrentUserAsync(
         Guid groupId,
-        long gmId,
         CreateCampaignTemplateRequest request)
     {
-        if (!await GroupBelongsToGmAsync(groupId, gmId))
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
+        if (!await sessionStore.IsGroupManagerAsync(groupId, identity.Value.Platform, identity.Value.ExternalUserId))
         {
-            throw new SessionAccessDeniedException(groupId, gmId);
+            throw new SessionAccessDeniedException(groupId, identity.Value.ExternalUserId);
         }
 
         var normalizedRequest = NormalizeCampaignTemplateRequest(request);
         return await sessionStore.CreateCampaignTemplateAsync(groupId, normalizedRequest);
     }
 
-    public async Task DeleteCampaignTemplateForGmAsync(Guid templateId, long gmId)
+    public async Task DeleteCampaignTemplateForCurrentUserAsync(Guid templateId)
     {
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
         var template = await sessionStore.GetCampaignTemplateAsync(templateId);
-        if (template is null || !await GroupBelongsToGmAsync(template.GroupId, gmId))
+        if (template is null || !await sessionStore.IsGroupManagerAsync(template.GroupId, identity.Value.Platform, identity.Value.ExternalUserId))
         {
-            throw new SessionAccessDeniedException(templateId, gmId);
+            throw new SessionAccessDeniedException(templateId, identity.Value.ExternalUserId);
         }
 
         await sessionStore.DeleteCampaignTemplateAsync(templateId, template.GroupId);
     }
 
-    public async Task<WebSessionBatch> CreateBatchFromCampaignTemplateForGmAsync(
+    public async Task<WebSessionBatch> CreateBatchFromCampaignTemplateForCurrentUserAsync(
         Guid templateId,
-        long gmId,
         DateTime firstScheduledAt)
     {
         if (firstScheduledAt <= DateTime.UtcNow)
@@ -184,89 +239,112 @@ public sealed class AuthorizedSessionService(ISessionStore sessionStore)
             throw new ArgumentOutOfRangeException(nameof(firstScheduledAt), firstScheduledAt, "First scheduled time must be in the future.");
         }
 
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
         var template = await sessionStore.GetCampaignTemplateAsync(templateId);
-        if (template is null || !await GroupBelongsToGmAsync(template.GroupId, gmId))
+        if (template is null || !await sessionStore.IsGroupManagerAsync(template.GroupId, identity.Value.Platform, identity.Value.ExternalUserId))
         {
-            throw new SessionAccessDeniedException(templateId, gmId);
+            throw new SessionAccessDeniedException(templateId, identity.Value.ExternalUserId);
         }
 
         return await sessionStore.CreateBatchFromTemplateAsync(templateId, template.GroupId, firstScheduledAt);
     }
 
-    public async Task AddCoGmForOwnerAsync(Guid groupId, long ownerTelegramId, long coGmTelegramId, string displayName, string? telegramUsername)
+    public async Task AddCoGmForOwnerAsync(Guid groupId, string coGmPlatform, string coGmExternalUserId, string displayName, string? externalUsername)
     {
-        if (coGmTelegramId <= 0)
+        if (string.IsNullOrWhiteSpace(coGmExternalUserId))
         {
-            throw new ArgumentOutOfRangeException(nameof(coGmTelegramId), coGmTelegramId, "Telegram id must be greater than zero.");
+            throw new ArgumentException("External user id must not be empty.", nameof(coGmExternalUserId));
         }
 
-        if (ownerTelegramId == coGmTelegramId)
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
+        if (identity.Value.ExternalUserId == coGmExternalUserId && identity.Value.Platform == coGmPlatform)
         {
             throw new InvalidOperationException("Owner is already a group manager.");
         }
 
-        if (!await sessionStore.IsGroupOwnerAsync(groupId, ownerTelegramId))
+        if (!await sessionStore.IsGroupOwnerAsync(groupId, identity.Value.Platform, identity.Value.ExternalUserId))
         {
-            throw new SessionAccessDeniedException(groupId, ownerTelegramId);
+            throw new SessionAccessDeniedException(groupId, identity.Value.ExternalUserId);
         }
 
         var normalizedName = string.IsNullOrWhiteSpace(displayName)
-            ? $"Telegram {coGmTelegramId.ToString(System.Globalization.CultureInfo.InvariantCulture)}"
+            ? $"{coGmPlatform} {coGmExternalUserId}"
             : displayName.Trim();
-        var normalizedUsername = string.IsNullOrWhiteSpace(telegramUsername)
+        var normalizedUsername = string.IsNullOrWhiteSpace(externalUsername)
             ? null
-            : telegramUsername.Trim().TrimStart('@');
+            : externalUsername.Trim().TrimStart('@');
 
-        await sessionStore.AddGroupCoGmAsync(groupId, ownerTelegramId, coGmTelegramId, normalizedName, normalizedUsername);
+        await sessionStore.AddGroupCoGmAsync(
+            groupId,
+            identity.Value.Platform, identity.Value.ExternalUserId,
+            coGmPlatform, coGmExternalUserId,
+            normalizedName, normalizedUsername);
     }
 
-    public async Task RemoveCoGmForOwnerAsync(Guid groupId, long ownerTelegramId, long coGmTelegramId)
+    public async Task RemoveCoGmForOwnerAsync(Guid groupId, string coGmPlatform, string coGmExternalUserId)
     {
-        if (!await sessionStore.IsGroupOwnerAsync(groupId, ownerTelegramId))
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
+        if (!await sessionStore.IsGroupOwnerAsync(groupId, identity.Value.Platform, identity.Value.ExternalUserId))
         {
-            throw new SessionAccessDeniedException(groupId, ownerTelegramId);
+            throw new SessionAccessDeniedException(groupId, identity.Value.ExternalUserId);
         }
 
-        await sessionStore.RemoveGroupCoGmAsync(groupId, coGmTelegramId);
+        await sessionStore.RemoveGroupCoGmAsync(groupId, coGmPlatform, coGmExternalUserId);
     }
 
-    public async Task<List<WebParticipant>?> GetSessionParticipantsForGmAsync(Guid sessionId, long gmId)
+    public async Task<List<WebParticipant>?> GetSessionParticipantsForCurrentUserAsync(Guid sessionId)
     {
-        var session = await GetSessionForGmAsync(sessionId, gmId);
+        var session = await GetSessionForCurrentUserAsync(sessionId);
         if (session is null)
-        {
             return null;
-        }
 
         return await sessionStore.GetSessionParticipantsAsync(sessionId);
     }
 
-    public async Task<List<SessionAuditLogEntry>?> GetSessionHistoryForGmAsync(Guid sessionId, long gmId)
+    public async Task<List<SessionAuditLogEntry>?> GetSessionHistoryForCurrentUserAsync(Guid sessionId)
     {
-        var session = await GetSessionForGmAsync(sessionId, gmId);
+        var session = await GetSessionForCurrentUserAsync(sessionId);
         if (session is null)
-        {
             return null;
-        }
 
         return await sessionStore.GetSessionHistoryAsync(sessionId);
     }
 
-    public async Task RemovePlayerFromSessionForGmAsync(Guid sessionId, long gmId, Guid participantId)
+    public async Task RemovePlayerFromSessionForCurrentUserAsync(Guid sessionId, Guid participantId)
     {
-        var session = await GetSessionForGmAsync(sessionId, gmId);
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            throw new InvalidOperationException("User is not authenticated.");
+
+        var session = await GetSessionForCurrentUserAsync(sessionId);
         if (session is null)
         {
-            throw new SessionAccessDeniedException(sessionId, gmId);
+            throw new SessionAccessDeniedException(sessionId, identity.Value.ExternalUserId);
         }
 
         await sessionStore.RemovePlayerFromSessionAsync(sessionId, session.GroupId, participantId);
-        await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "PlayerRemoved", participantId.ToString(), null);
+        await sessionStore.LogSessionChangeAsync(sessionId, identity.Value.ExternalUserId, identity.Value.Name, "PlayerRemoved", participantId.ToString(), null);
     }
 
-    private async Task<bool> GroupBelongsToGmAsync(Guid groupId, long gmId)
+    public async Task<List<PlayerAttendanceStats>?> GetGroupAttendanceStatsForCurrentUserAsync(Guid groupId)
     {
-        return await sessionStore.IsGroupManagerAsync(groupId, gmId);
+        var identity = GetCurrentIdentity();
+        if (identity is null)
+            return null;
+
+        if (!await sessionStore.IsGroupManagerAsync(groupId, identity.Value.Platform, identity.Value.ExternalUserId))
+            return null;
+
+        return await sessionStore.GetGroupAttendanceStatsAsync(groupId);
     }
 
     private static CreateCampaignTemplateRequest NormalizeCampaignTemplateRequest(CreateCampaignTemplateRequest request)

src/GmRelay.Web/Services/ClaimsPrincipalExtensions.cs

@@ -6,4 +6,37 @@ public static class ClaimsPrincipalExtensions
 {
     public static bool TryGetTelegramId(this ClaimsPrincipal user, out long telegramId) =>
         long.TryParse(user.FindFirst("TelegramId")?.Value, out telegramId);
+
+    public static bool TryGetDiscordId(this ClaimsPrincipal user, out string? discordId)
+    {
+        discordId = user.FindFirst("DiscordId")?.Value;
+        return !string.IsNullOrWhiteSpace(discordId);
+    }
+
+    public static bool TryGetPlatformIdentity(this ClaimsPrincipal user, out string platform, out string externalUserId)
+    {
+        platform = string.Empty;
+        externalUserId = string.Empty;
+
+        var platformClaim = user.FindFirst("Platform")?.Value;
+        if (!string.IsNullOrWhiteSpace(platformClaim))
+        {
+            platform = platformClaim;
+            externalUserId = user.FindFirst(ClaimTypes.NameIdentifier)?.Value ?? string.Empty;
+            return !string.IsNullOrWhiteSpace(externalUserId);
+        }
+
+        // Fallback for legacy Telegram users before Platform claim was added
+        if (TryGetTelegramId(user, out var telegramId))
+        {
+            platform = "Telegram";
+            externalUserId = telegramId.ToString(System.Globalization.CultureInfo.InvariantCulture);
+            return true;
+        }
+
+        return false;
+    }
+
+    public static string? GetAvatarUrl(this ClaimsPrincipal user) =>
+        user.FindFirst("AvatarUrl")?.Value;
 }

src/GmRelay.Web/Services/DiscordAuthService.cs

@@ -0,0 +1,86 @@
+using System.Net.Http.Headers;
+using System.Security.Claims;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace GmRelay.Web.Services;
+
+public sealed class DiscordAuthService(IHttpClientFactory httpClientFactory, IConfiguration configuration, ILogger<DiscordAuthService> logger)
+{
+    private readonly DiscordOAuthOptions _options = configuration.GetSection("Discord").Get<DiscordOAuthOptions>() ?? new DiscordOAuthOptions();
+
+    public string BuildAuthorizeUrl(string state)
+    {
+        _options.Validate();
+        var scopes = string.Join(" ", _options.Scopes);
+        return $"https://discord.com/oauth2/authorize?client_id={_options.ClientId}&redirect_uri={Uri.EscapeDataString(_options.RedirectUri)}&response_type=code&scope={Uri.EscapeDataString(scopes)}&state={Uri.EscapeDataString(state)}";
+    }
+
+    public async Task<DiscordUser?> ExchangeCodeAsync(string code)
+    {
+        _options.Validate();
+        var client = httpClientFactory.CreateClient();
+
+        var tokenResponse = await ExchangeCodeForTokenAsync(client, code);
+        if (tokenResponse is null)
+            return null;
+
+        return await FetchUserProfileAsync(client, tokenResponse.AccessToken);
+    }
+
+    private async Task<DiscordTokenResponse?> ExchangeCodeForTokenAsync(HttpClient client, string code)
+    {
+        var content = new FormUrlEncodedContent(new Dictionary<string, string>
+        {
+            ["grant_type"] = "authorization_code",
+            ["code"] = code,
+            ["redirect_uri"] = _options.RedirectUri,
+            ["client_id"] = _options.ClientId,
+            ["client_secret"] = _options.ClientSecret
+        });
+
+        var response = await client.PostAsync("https://discord.com/api/oauth2/token", content);
+        var json = await response.Content.ReadAsStringAsync();
+        if (!response.IsSuccessStatusCode)
+        {
+            logger.LogError("Discord token exchange failed: {StatusCode} {Body}. client_id={ClientId}, redirect_uri={RedirectUri}",
+                (int)response.StatusCode, json, _options.ClientId, _options.RedirectUri);
+            return null;
+        }
+
+        return JsonSerializer.Deserialize<DiscordTokenResponse>(json);
+    }
+
+    private static async Task<DiscordUser?> FetchUserProfileAsync(HttpClient client, string accessToken)
+    {
+        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
+        var response = await client.GetAsync("https://discord.com/api/users/@me");
+        if (!response.IsSuccessStatusCode)
+            return null;
+
+        var json = await response.Content.ReadAsStringAsync();
+        return JsonSerializer.Deserialize<DiscordUser>(json);
+    }
+}
+
+public sealed record DiscordTokenResponse(
+    [property: JsonPropertyName("access_token")] string AccessToken,
+    [property: JsonPropertyName("token_type")] string TokenType,
+    [property: JsonPropertyName("expires_in")] int ExpiresIn,
+    [property: JsonPropertyName("scope")] string Scope);
+
+public sealed record DiscordUser(
+    [property: JsonPropertyName("id")] string Id,
+    [property: JsonPropertyName("username")] string Username,
+    [property: JsonPropertyName("discriminator")] string Discriminator,
+    [property: JsonPropertyName("avatar")] string? Avatar,
+    [property: JsonPropertyName("email")] string? Email)
+{
+    public string DisplayName =>
+        Discriminator == "0" ? Username : $"{Username}#{Discriminator}";
+
+    public string? AvatarUrl =>
+        !string.IsNullOrWhiteSpace(Avatar)
+            ? $"https://cdn.discordapp.com/avatars/{Id}/{Avatar}.png"
+            : null;
+}

src/GmRelay.Web/Services/DiscordOAuthStateStore.cs

@@ -0,0 +1,32 @@
+namespace GmRelay.Web.Services;
+
+public sealed class DiscordOAuthStateStore(ILogger<DiscordOAuthStateStore> logger)
+{
+    private readonly System.Collections.Concurrent.ConcurrentDictionary<string, DateTime> _states = new();
+
+    public string CreateState()
+    {
+        var state = Guid.NewGuid().ToString("N");
+        _states[state] = DateTime.UtcNow.AddMinutes(5);
+        logger.LogDebug("Discord OAuth state created: {State}", state);
+        return state;
+    }
+
+    public bool ValidateAndRemove(string state)
+    {
+        if (!_states.TryRemove(state, out var expiresAt))
+        {
+            logger.LogWarning("Discord OAuth state not found or already used: {State}", state);
+            return false;
+        }
+
+        if (DateTime.UtcNow > expiresAt)
+        {
+            logger.LogWarning("Discord OAuth state expired: {State}", state);
+            return false;
+        }
+
+        logger.LogDebug("Discord OAuth state validated: {State}", state);
+        return true;
+    }
+}

src/GmRelay.Web/Services/ISessionStore.cs

@@ -5,33 +5,31 @@ namespace GmRelay.Web.Services;
 public sealed record PlayerAttendanceStats(
     Guid PlayerId,
     string DisplayName,
-    string? TelegramUsername,
+    string? ExternalUsername,
     long TotalSessions,
     long ConfirmedCount,
     long DeclinedCount,
     long NoResponseCount,
     long WaitlistedCount,
     long CancellationAffectedCount,
-    decimal AttendanceRate
+    decimal AttendanceRate);
-);
 
 public sealed record SessionAuditLogEntry(
     Guid Id,
     Guid SessionId,
-    long ActorTelegramId,
+    string ActorExternalUserId,
     string ActorName,
     string ChangeType,
     string? OldValue,
     string? NewValue,
-    DateTime ChangedAt
+    DateTime ChangedAt);
-);
 
 public interface ISessionStore
 {
-    Task<List<WebGameGroup>> GetGroupsForGmAsync(long gmId);
+    Task<List<WebGameGroup>> GetGroupsForUserAsync(string platform, string externalUserId);
     Task<WebGameGroup?> GetGroupAsync(Guid groupId);
-    Task<bool> IsGroupManagerAsync(Guid groupId, long telegramId);
+    Task<bool> IsGroupManagerAsync(Guid groupId, string platform, string externalUserId);
-    Task<bool> IsGroupOwnerAsync(Guid groupId, long telegramId);
+    Task<bool> IsGroupOwnerAsync(Guid groupId, string platform, string externalUserId);
     Task<List<WebGroupManager>> GetGroupManagersAsync(Guid groupId);
     Task<List<WebSession>> GetUpcomingSessionsAsync(Guid groupId);
     Task<WebSession?> GetSessionAsync(Guid sessionId);
@@ -47,11 +45,27 @@ public interface ISessionStore
     Task<WebCampaignTemplate> CreateCampaignTemplateAsync(Guid groupId, CreateCampaignTemplateRequest request);
     Task DeleteCampaignTemplateAsync(Guid templateId, Guid groupId);
     Task<WebSessionBatch> CreateBatchFromTemplateAsync(Guid templateId, Guid groupId, DateTime firstScheduledAt);
-    Task AddGroupCoGmAsync(Guid groupId, long ownerTelegramId, long coGmTelegramId, string displayName, string? telegramUsername);
+    Task AddGroupCoGmAsync(Guid groupId, string ownerPlatform, string ownerExternalUserId, string coGmPlatform, string coGmExternalUserId, string displayName, string? externalUsername);
-    Task RemoveGroupCoGmAsync(Guid groupId, long coGmTelegramId);
+    Task RemoveGroupCoGmAsync(Guid groupId, string coGmPlatform, string coGmExternalUserId);
     Task<List<WebParticipant>> GetSessionParticipantsAsync(Guid sessionId);
     Task RemovePlayerFromSessionAsync(Guid sessionId, Guid groupId, Guid participantId);
     Task<List<PlayerAttendanceStats>> GetGroupAttendanceStatsAsync(Guid groupId);
-    Task LogSessionChangeAsync(Guid sessionId, long actorTelegramId, string actorName, string changeType, string? oldValue, string? newValue);
+    Task LogSessionChangeAsync(Guid sessionId, string actorExternalUserId, string actorName, string changeType, string? oldValue, string? newValue);
     Task<List<SessionAuditLogEntry>> GetSessionHistoryAsync(Guid sessionId);
+    Task UpsertDiscordUserAsync(string discordId, string displayName, string? avatarUrl);
+
+    // --- Identity linking (issue #35) ---
+    Task<Guid?> ResolveEffectivePlayerIdAsync(string platform, string externalUserId);
+    Task<List<LinkedIdentity>> GetLinkedIdentitiesAsync(string platform, string externalUserId);
+    Task LinkIdentityAsync(string currentPlatform, string currentExternalUserId, string targetPlatform, string targetExternalUserId, string? currentName);
+    Task UnlinkIdentityAsync(string currentPlatform, string currentExternalUserId, string targetPlatform, string targetExternalUserId);
+    Task UpsertPlayerAsync(string platform, string externalUserId, string displayName, string? avatarUrl);
 }
+
+public sealed record LinkedIdentity(
+    string Platform,
+    string ExternalUserId,
+    string DisplayName,
+    string? ExternalUsername,
+    string? AvatarUrl,
+    DateTime LinkedAt);

src/GmRelay.Web/Services/SessionAccessDeniedException.cs

@@ -1,4 +1,4 @@
 namespace GmRelay.Web.Services;
 
-public sealed class SessionAccessDeniedException(Guid sessionId, long gmId)
+public sealed class SessionAccessDeniedException(Guid sessionId, string externalUserId)
-    : InvalidOperationException($"Session '{sessionId}' is not accessible for GM '{gmId}'.");
+    : InvalidOperationException($"Session '{sessionId}' is not accessible for user '{externalUserId}'.");

src/GmRelay.Web/Services/SessionService.cs

@@ -10,16 +10,32 @@ namespace GmRelay.Web.Services;
 public sealed record WebGameGroup(
     Guid Id,
     long TelegramChatId,
+    string? ExternalGroupId,
     string Name,
-    long GmTelegramId,
+    string? Platform,
-    string ManagerRole = GroupManagerRoleExtensions.OwnerValue);
+    string ManagerRole = GroupManagerRoleExtensions.OwnerValue)
+{
+    public long GmTelegramId { get; init; }
+
+    public WebGameGroup(Guid id, long telegramChatId, string name, long gmTelegramId)
+        : this(id, telegramChatId, null, name, null)
+    {
+        GmTelegramId = gmTelegramId;
+    }
+}
 
 public sealed record WebGroupManager(
     long TelegramId,
+    string? ExternalUserId,
     string DisplayName,
     string? TelegramUsername,
+    string? ExternalUsername,
     string Role,
-    DateTime AddedAt);
+    DateTime AddedAt)
+{
+    public WebGroupManager(long telegramId, string displayName, string? telegramUsername, string role, DateTime addedAt)
+        : this(telegramId, null, displayName, telegramUsername, null, role, addedAt) { }
+}
 
 public sealed record WebGroupManagement(
     WebGameGroup Group,
@@ -44,8 +60,10 @@ public sealed record WebSession(
 public sealed record WebParticipant(
     Guid Id,
     long TelegramId,
+    string? ExternalUserId,
     string DisplayName,
     string? TelegramUsername,
+    string? ExternalUsername,
     string RsvpStatus,
     string RegistrationStatus,
     bool IsGm,
@@ -83,23 +101,27 @@ public sealed class SessionService(
     ITelegramBotClient bot,
     ILogger<SessionService> logger) : ISessionStore
 {
-    public async Task<List<WebGameGroup>> GetGroupsForGmAsync(long gmId)
+    public async Task<List<WebGameGroup>> GetGroupsForUserAsync(string platform, string externalUserId)
     {
         await using var conn = await dataSource.OpenConnectionAsync();
+        var effectiveId = await _ResolveEffectivePlayerIdAsync(conn, platform, externalUserId);
+        if (effectiveId is null)
+            return [];
+
         return (await conn.QueryAsync<WebGameGroup>(
             """
             SELECT g.id,
                    g.telegram_chat_id AS TelegramChatId,
+                   g.external_group_id AS ExternalGroupId,
                    g.name,
-                   g.gm_telegram_id AS GmTelegramId,
+                   g.platform AS Platform,
                    gm.role AS ManagerRole
             FROM group_managers gm
-            JOIN players p ON p.id = gm.player_id
             JOIN game_groups g ON g.id = gm.group_id
-            WHERE p.telegram_id = @GmId
+            WHERE gm.player_id = @PlayerId
             ORDER BY g.name
             """,
-            new { GmId = gmId })).ToList();
+            new { PlayerId = effectiveId.Value })).ToList();
     }
 
     public async Task<WebGameGroup?> GetGroupAsync(Guid groupId)
@@ -109,8 +131,9 @@ public sealed class SessionService(
             """
             SELECT g.id,
                    g.telegram_chat_id AS TelegramChatId,
+                   g.external_group_id AS ExternalGroupId,
                    g.name,
-                   g.gm_telegram_id AS GmTelegramId,
+                   g.platform AS Platform,
                    @OwnerRole AS ManagerRole
             FROM game_groups g
             WHERE g.id = @GroupId
@@ -118,37 +141,43 @@ public sealed class SessionService(
             new { GroupId = groupId, OwnerRole = GroupManagerRoleExtensions.OwnerValue });
     }
 
-    public async Task<bool> IsGroupManagerAsync(Guid groupId, long telegramId)
+    public async Task<bool> IsGroupManagerAsync(Guid groupId, string platform, string externalUserId)
     {
         await using var conn = await dataSource.OpenConnectionAsync();
+        var effectiveId = await _ResolveEffectivePlayerIdAsync(conn, platform, externalUserId);
+        if (effectiveId is null)
+            return false;
+
         return await conn.ExecuteScalarAsync<bool>(
             """
             SELECT EXISTS (
                 SELECT 1
-                FROM group_managers gm
+                FROM group_managers
-                JOIN players p ON p.id = gm.player_id
+                WHERE group_id = @GroupId
-                WHERE gm.group_id = @GroupId
+                  AND player_id = @PlayerId
-                  AND p.telegram_id = @TelegramId
             )
             """,
-            new { GroupId = groupId, TelegramId = telegramId });
+            new { GroupId = groupId, PlayerId = effectiveId.Value });
     }
 
-    public async Task<bool> IsGroupOwnerAsync(Guid groupId, long telegramId)
+    public async Task<bool> IsGroupOwnerAsync(Guid groupId, string platform, string externalUserId)
     {
         await using var conn = await dataSource.OpenConnectionAsync();
+        var effectiveId = await _ResolveEffectivePlayerIdAsync(conn, platform, externalUserId);
+        if (effectiveId is null)
+            return false;
+
         return await conn.ExecuteScalarAsync<bool>(
             """
             SELECT EXISTS (
                 SELECT 1
-                FROM group_managers gm
+                FROM group_managers
-                JOIN players p ON p.id = gm.player_id
+                WHERE group_id = @GroupId
-                WHERE gm.group_id = @GroupId
+                  AND player_id = @PlayerId
-                  AND p.telegram_id = @TelegramId
+                  AND role = @OwnerRole
-                  AND gm.role = @OwnerRole
             )
             """,
-            new { GroupId = groupId, TelegramId = telegramId, OwnerRole = GroupManagerRoleExtensions.OwnerValue });
+            new { GroupId = groupId, PlayerId = effectiveId.Value, OwnerRole = GroupManagerRoleExtensions.OwnerValue });
     }
 
     public async Task<List<WebGroupManager>> GetGroupManagersAsync(Guid groupId)
@@ -156,9 +185,11 @@ public sealed class SessionService(
         await using var conn = await dataSource.OpenConnectionAsync();
         return (await conn.QueryAsync<WebGroupManager>(
             """
-            SELECT p.telegram_id AS TelegramId,
+            SELECT COALESCE(p.telegram_id, 0) AS TelegramId,
+                   COALESCE(p.external_user_id, p.telegram_id::TEXT) AS ExternalUserId,
                    p.display_name AS DisplayName,
                    p.telegram_username AS TelegramUsername,
+                   COALESCE(p.external_username, p.telegram_username) AS ExternalUsername,
                    gm.role AS Role,
                    gm.created_at AS AddedAt
             FROM group_managers gm
@@ -179,7 +210,7 @@ public sealed class SessionService(
             SELECT
                 p.id AS PlayerId,
                 p.display_name AS DisplayName,
-                p.telegram_username AS TelegramUsername,
+                COALESCE(p.external_username, p.telegram_username) AS ExternalUsername,
                 COUNT(DISTINCT s.id) AS TotalSessions,
                 COUNT(DISTINCT CASE WHEN sp.rsvp_status = 'Confirmed' THEN s.id END) AS ConfirmedCount,
                 COUNT(DISTINCT CASE WHEN sp.rsvp_status = 'Declined' THEN s.id END) AS DeclinedCount,
@@ -198,21 +229,21 @@ public sealed class SessionService(
             WHERE s.group_id = @GroupId
               AND s.scheduled_at <= now()
               AND sp.is_gm = false
-            GROUP BY p.id, p.display_name, p.telegram_username
+            GROUP BY p.id, p.display_name, p.external_username, p.telegram_username
             ORDER BY AttendanceRate DESC, ConfirmedCount DESC
             """,
             new { GroupId = groupId })).ToList();
     }
 
-    public async Task LogSessionChangeAsync(Guid sessionId, long actorTelegramId, string actorName, string changeType, string? oldValue, string? newValue)
+    public async Task LogSessionChangeAsync(Guid sessionId, string actorExternalUserId, string actorName, string changeType, string? oldValue, string? newValue)
     {
         await using var conn = await dataSource.OpenConnectionAsync();
         await conn.ExecuteAsync(
             """
-            INSERT INTO session_audit_log (session_id, actor_telegram_id, actor_name, change_type, old_value, new_value)
+            INSERT INTO session_audit_log (session_id, actor_external_user_id, actor_name, change_type, old_value, new_value)
-            VALUES (@SessionId, @ActorTelegramId, @ActorName, @ChangeType, @OldValue, @NewValue)
+            VALUES (@SessionId, @ActorExternalUserId, @ActorName, @ChangeType, @OldValue, @NewValue)
             """,
-            new { SessionId = sessionId, ActorTelegramId = actorTelegramId, ActorName = actorName, ChangeType = changeType, OldValue = oldValue, NewValue = newValue });
+            new { SessionId = sessionId, ActorExternalUserId = actorExternalUserId, ActorName = actorName, ChangeType = changeType, OldValue = oldValue, NewValue = newValue });
     }
 
     public async Task<List<SessionAuditLogEntry>> GetSessionHistoryAsync(Guid sessionId)
@@ -220,7 +251,7 @@ public sealed class SessionService(
         await using var conn = await dataSource.OpenConnectionAsync();
         var entries = await conn.QueryAsync<SessionAuditLogEntry>(
             """
-            SELECT id, session_id AS SessionId, actor_telegram_id AS ActorTelegramId, actor_name AS ActorName,
+            SELECT id, session_id AS SessionId, actor_external_user_id AS ActorExternalUserId, actor_name AS ActorName,
                    change_type AS ChangeType, old_value AS OldValue, new_value AS NewValue, changed_at AS ChangedAt
             FROM session_audit_log
             WHERE session_id = @SessionId
@@ -232,43 +263,23 @@ public sealed class SessionService(
 
     public async Task AddGroupCoGmAsync(
         Guid groupId,
-        long ownerTelegramId,
+        string ownerPlatform, string ownerExternalUserId,
-        long coGmTelegramId,
+        string coGmPlatform, string coGmExternalUserId,
-        string displayName,
+        string displayName, string? externalUsername)
-        string? telegramUsername)
     {
         await using var conn = await dataSource.OpenConnectionAsync();
         await using var transaction = await conn.BeginTransactionAsync();
 
-        await conn.ExecuteAsync(
+        var ownerPlayerId = await _ResolveEffectivePlayerIdAsync(conn, ownerPlatform, ownerExternalUserId);
-            """
+        if (ownerPlayerId is null)
-            INSERT INTO players (telegram_id, display_name, telegram_username, platform, external_user_id, external_username)
+            throw new InvalidOperationException("Owner player not found.");
-            VALUES (@TelegramId, @DisplayName, @TelegramUsername, 'Telegram', @TelegramId::TEXT, @TelegramUsername)
+
-            ON CONFLICT (telegram_id) DO UPDATE
+        var coGmPlayerId = await _UpsertPlayerAndGetIdAsync(conn, coGmPlatform, coGmExternalUserId, displayName, externalUsername, transaction);
-            SET display_name = EXCLUDED.display_name,
-                telegram_username = EXCLUDED.telegram_username,
-                platform = COALESCE(players.platform, 'Telegram'),
-                external_user_id = COALESCE(players.external_user_id, EXCLUDED.telegram_id::TEXT),
-                external_username = COALESCE(players.external_username, EXCLUDED.telegram_username)
-            """,
-            new
-            {
-                TelegramId = coGmTelegramId,
-                DisplayName = displayName,
-                TelegramUsername = telegramUsername
-            },
-            transaction);
 
         await conn.ExecuteAsync(
             """
             INSERT INTO group_managers (group_id, player_id, role, added_by_player_id)
-            SELECT @GroupId,
+            VALUES (@GroupId, @CoGmPlayerId, @CoGmRole, @OwnerPlayerId)
-                   co_gm.id,
-                   @CoGmRole,
-                   owner_player.id
-            FROM players co_gm
-            LEFT JOIN players owner_player ON owner_player.telegram_id = @OwnerTelegramId
-            WHERE co_gm.telegram_id = @CoGmTelegramId
             ON CONFLICT (group_id, player_id) DO UPDATE
             SET role = CASE
                     WHEN group_managers.role = @OwnerRole THEN group_managers.role
@@ -279,8 +290,8 @@ public sealed class SessionService(
             new
             {
                 GroupId = groupId,
-                OwnerTelegramId = ownerTelegramId,
+                OwnerPlayerId = ownerPlayerId.Value,
-                CoGmTelegramId = coGmTelegramId,
+                CoGmPlayerId = coGmPlayerId,
                 OwnerRole = GroupManagerRoleExtensions.OwnerValue,
                 CoGmRole = GroupManagerRoleExtensions.CoGmValue
             },
@@ -289,22 +300,24 @@ public sealed class SessionService(
         await transaction.CommitAsync();
     }
 
-    public async Task RemoveGroupCoGmAsync(Guid groupId, long coGmTelegramId)
+    public async Task RemoveGroupCoGmAsync(Guid groupId, string coGmPlatform, string coGmExternalUserId)
     {
         await using var conn = await dataSource.OpenConnectionAsync();
+        var coGmPlayerId = await _ResolveEffectivePlayerIdAsync(conn, coGmPlatform, coGmExternalUserId);
+        if (coGmPlayerId is null)
+            return;
+
         await conn.ExecuteAsync(
             """
-            DELETE FROM group_managers gm
+            DELETE FROM group_managers
-            USING players p
+            WHERE group_id = @GroupId
-            WHERE gm.player_id = p.id
+              AND player_id = @PlayerId
-              AND gm.group_id = @GroupId
+              AND role = @CoGmRole
-              AND p.telegram_id = @CoGmTelegramId
-              AND gm.role = @CoGmRole
             """,
             new
             {
                 GroupId = groupId,
-                CoGmTelegramId = coGmTelegramId,
+                PlayerId = coGmPlayerId.Value,
                 CoGmRole = GroupManagerRoleExtensions.CoGmValue
             });
     }
@@ -426,7 +439,7 @@ public sealed class SessionService(
 
         if (oldSession is null)
         {
-            throw new SessionAccessDeniedException(sessionId, 0);
+            throw new SessionAccessDeniedException(sessionId, "0");
         }
 
         var updatedRows = await conn.ExecuteAsync(
@@ -454,7 +467,7 @@ public sealed class SessionService(
 
         if (updatedRows == 0)
         {
-            throw new SessionAccessDeniedException(sessionId, 0);
+            throw new SessionAccessDeniedException(sessionId, "0");
         }
 
         await conn.ExecuteAsync(
@@ -513,7 +526,7 @@ public sealed class SessionService(
 
         if (session is null)
         {
-            throw new SessionAccessDeniedException(sessionId, 0);
+            throw new SessionAccessDeniedException(sessionId, "0");
         }
 
         var activeParticipants = await conn.ExecuteScalarAsync<int>(
@@ -597,9 +610,11 @@ public sealed class SessionService(
         return (await conn.QueryAsync<WebParticipant>(
             """
             SELECT sp.id AS Id,
-                   p.telegram_id AS TelegramId,
+                   COALESCE(p.telegram_id, 0) AS TelegramId,
+                   COALESCE(p.external_user_id, p.telegram_id::TEXT) AS ExternalUserId,
                    p.display_name AS DisplayName,
                    p.telegram_username AS TelegramUsername,
+                   COALESCE(p.external_username, p.telegram_username) AS ExternalUsername,
                    sp.rsvp_status AS RsvpStatus,
                    sp.registration_status AS RegistrationStatus,
                    sp.is_gm AS IsGm,
@@ -637,7 +652,7 @@ public sealed class SessionService(
 
         if (session is null)
         {
-            throw new SessionAccessDeniedException(sessionId, 0);
+            throw new SessionAccessDeniedException(sessionId, "0");
         }
 
         var participant = await conn.QuerySingleOrDefaultAsync<WebParticipant>(
@@ -744,7 +759,7 @@ public sealed class SessionService(
         var batch = await GetBatchInfoAsync(conn, batchId, groupId, transaction);
         if (batch is null)
         {
-            throw new SessionAccessDeniedException(batchId, 0);
+            throw new SessionAccessDeniedException(batchId, "0");
         }
 
         var updatedRows = await conn.ExecuteAsync(
@@ -767,7 +782,7 @@ public sealed class SessionService(
 
         if (updatedRows == 0)
         {
-            throw new SessionAccessDeniedException(batchId, 0);
+            throw new SessionAccessDeniedException(batchId, "0");
         }
 
         await transaction.CommitAsync();
@@ -786,7 +801,7 @@ public sealed class SessionService(
         var batch = await GetBatchInfoAsync(conn, batchId, groupId, transaction);
         if (batch is null)
         {
-            throw new SessionAccessDeniedException(batchId, 0);
+            throw new SessionAccessDeniedException(batchId, "0");
         }
 
         var updatedRows = await conn.ExecuteAsync(
@@ -807,7 +822,7 @@ public sealed class SessionService(
 
         if (updatedRows == 0)
         {
-            throw new SessionAccessDeniedException(batchId, 0);
+            throw new SessionAccessDeniedException(batchId, "0");
         }
 
         await transaction.CommitAsync();
@@ -844,7 +859,7 @@ public sealed class SessionService(
 
         if (batchSessions.Count == 0)
         {
-            throw new SessionAccessDeniedException(batchId, 0);
+            throw new SessionAccessDeniedException(batchId, "0");
         }
 
         var newSchedule = BatchSchedulePlanner.BuildFixedIntervalSchedule(
@@ -928,7 +943,7 @@ public sealed class SessionService(
 
         if (sourceSessions.Count == 0)
         {
-            throw new SessionAccessDeniedException(batchId, 0);
+            throw new SessionAccessDeniedException(batchId, "0");
         }
 
         var newBatchId = Guid.NewGuid();
@@ -1130,7 +1145,7 @@ public sealed class SessionService(
 
         if (template is null)
         {
-            throw new SessionAccessDeniedException(templateId, 0);
+            throw new SessionAccessDeniedException(templateId, "0");
         }
 
         var group = await conn.QuerySingleOrDefaultAsync<WebTemplateGroupDto>(
@@ -1140,7 +1155,7 @@ public sealed class SessionService(
 
         if (group is null)
         {
-            throw new SessionAccessDeniedException(groupId, 0);
+            throw new SessionAccessDeniedException(groupId, "0");
         }
 
         var schedule = BatchSchedulePlanner.BuildRecurringSchedule(
@@ -1325,4 +1340,258 @@ public sealed class SessionService(
             new { BatchId = batchId, GroupId = groupId },
             transaction);
     }
+
+    // --- Identity linking (issue #35) ---
+
+    public async Task<Guid?> ResolveEffectivePlayerIdAsync(string platform, string externalUserId)
+    {
+        await using var conn = await dataSource.OpenConnectionAsync();
+        return await _ResolveEffectivePlayerIdAsync(conn, platform, externalUserId);
+    }
+
+    public async Task<List<LinkedIdentity>> GetLinkedIdentitiesAsync(string platform, string externalUserId)
+    {
+        await using var conn = await dataSource.OpenConnectionAsync();
+
+        var effectiveId = await _ResolveEffectivePlayerIdAsync(conn, platform, externalUserId);
+        if (effectiveId is null)
+            return [];
+
+        return (await conn.QueryAsync<LinkedIdentity>(
+            """
+            SELECT p.platform AS Platform,
+                   p.external_user_id AS ExternalUserId,
+                   p.display_name AS DisplayName,
+                   p.external_username AS ExternalUsername,
+                   p.avatar_url AS AvatarUrl,
+                   COALESCE(pl.linked_at, p.created_at) AS LinkedAt
+            FROM players p
+            LEFT JOIN player_links pl ON pl.secondary_player_id = p.id
+            WHERE pl.primary_player_id = @EffectiveId
+               OR p.id = @EffectiveId
+            ORDER BY CASE WHEN p.id = @EffectiveId THEN 0 ELSE 1 END,
+                     p.platform
+            """,
+            new { EffectiveId = effectiveId.Value })).ToList();
+    }
+
+    public async Task LinkIdentityAsync(
+        string currentPlatform, string currentExternalUserId,
+        string targetPlatform, string targetExternalUserId,
+        string? currentName)
+    {
+        if (currentPlatform == targetPlatform && currentExternalUserId == targetExternalUserId)
+            throw new InvalidOperationException("Cannot link an identity to itself.");
+
+        await using var conn = await dataSource.OpenConnectionAsync();
+        await using var transaction = await conn.BeginTransactionAsync();
+
+        // Resolve current player (must exist — they are logged in)
+        var currentPlayerId = await _ResolvePlayerIdAsync(conn, currentPlatform, currentExternalUserId);
+        if (currentPlayerId is null)
+            throw new InvalidOperationException("Current player not found.");
+
+        // Upsert target player so it exists
+        var targetDisplayName = currentName ?? $"{targetPlatform} {targetExternalUserId}";
+        var targetPlayerId = await _UpsertPlayerAndGetIdAsync(conn, targetPlatform, targetExternalUserId, targetDisplayName, null, transaction);
+
+        // Check if target is already a primary of another link chain (conflict)
+        var targetIsPrimary = await conn.ExecuteScalarAsync<bool>(
+            """
+            SELECT EXISTS (
+                SELECT 1 FROM player_links WHERE primary_player_id = @TargetPlayerId
+            )
+            """,
+            new { TargetPlayerId = targetPlayerId }, transaction);
+
+        if (targetIsPrimary)
+        {
+            await _LogIdentityAuditAsync(conn, currentPlayerId.Value, "link_attempt_conflict",
+                targetPlatform, targetExternalUserId, currentPlayerId.Value, transaction);
+            await transaction.CommitAsync();
+            throw new InvalidOperationException("Target identity is already the primary account of another linked set.");
+        }
+
+        // Check if current is already a secondary (then their primary becomes the effective primary)
+        var currentPrimaryId = await conn.QuerySingleOrDefaultAsync<Guid?>(
+            """
+            SELECT primary_player_id
+            FROM player_links
+            WHERE secondary_player_id = @CurrentPlayerId
+            """,
+            new { CurrentPlayerId = currentPlayerId.Value }, transaction);
+
+        var effectiveCurrentPrimary = currentPrimaryId ?? currentPlayerId.Value;
+
+        // Check if target is already linked to someone else as secondary
+        var existingLink = await conn.QuerySingleOrDefaultAsync<Guid?>(
+            """
+            SELECT primary_player_id
+            FROM player_links
+            WHERE secondary_player_id = @TargetPlayerId
+            """,
+            new { TargetPlayerId = targetPlayerId }, transaction);
+
+        if (existingLink is not null && existingLink.Value != effectiveCurrentPrimary)
+        {
+            await _LogIdentityAuditAsync(conn, effectiveCurrentPrimary, "link_attempt_conflict",
+                targetPlatform, targetExternalUserId, currentPlayerId.Value, transaction);
+            await transaction.CommitAsync();
+            throw new InvalidOperationException("Target identity is already linked to another account.");
+        }
+
+        var effectivePrimary = currentPrimaryId ?? currentPlayerId.Value;
+
+        // Check if already linked
+        var alreadyLinked = await conn.ExecuteScalarAsync<bool>(
+            """
+            SELECT EXISTS (
+                SELECT 1 FROM player_links
+                WHERE primary_player_id = @EffectivePrimary AND secondary_player_id = @TargetPlayerId
+            )
+            """,
+            new { EffectivePrimary = effectivePrimary, TargetPlayerId = targetPlayerId }, transaction);
+
+        if (alreadyLinked)
+        {
+            await transaction.CommitAsync();
+            return; // Already linked, idempotent
+        }
+
+        await conn.ExecuteAsync(
+            """
+            INSERT INTO player_links (primary_player_id, secondary_player_id, linked_by_player_id)
+            VALUES (@PrimaryPlayerId, @SecondaryPlayerId, @LinkedByPlayerId)
+            """,
+            new
+            {
+                PrimaryPlayerId = effectivePrimary,
+                SecondaryPlayerId = targetPlayerId,
+                LinkedByPlayerId = currentPlayerId.Value
+            },
+            transaction);
+
+        await _LogIdentityAuditAsync(conn, effectivePrimary, "link",
+            targetPlatform, targetExternalUserId, currentPlayerId.Value, transaction);
+
+        await transaction.CommitAsync();
+    }
+
+    public async Task UnlinkIdentityAsync(
+        string currentPlatform, string currentExternalUserId,
+        string targetPlatform, string targetExternalUserId)
+    {
+        if (currentPlatform == targetPlatform && currentExternalUserId == targetExternalUserId)
+            throw new InvalidOperationException("Cannot unlink your own primary identity from itself.");
+
+        await using var conn = await dataSource.OpenConnectionAsync();
+        await using var transaction = await conn.BeginTransactionAsync();
+
+        var currentPlayerId = await _ResolvePlayerIdAsync(conn, currentPlatform, currentExternalUserId);
+        if (currentPlayerId is null)
+            throw new InvalidOperationException("Current player not found.");
+
+        var targetPlayerId = await _ResolvePlayerIdAsync(conn, targetPlatform, targetExternalUserId);
+        if (targetPlayerId is null)
+            throw new InvalidOperationException("Target identity not found.");
+
+        var effectivePrimary = await _ResolveEffectivePlayerIdAsync(conn, currentPlatform, currentExternalUserId);
+        if (effectivePrimary is null)
+            throw new InvalidOperationException("Effective primary not found.");
+
+        // Only the primary account owner (or the linked identity itself) can unlink
+        var rows = await conn.ExecuteAsync(
+            """
+            DELETE FROM player_links
+            WHERE primary_player_id = @EffectivePrimary
+              AND secondary_player_id = @TargetPlayerId
+            """,
+            new { EffectivePrimary = effectivePrimary.Value, TargetPlayerId = targetPlayerId.Value },
+            transaction);
+
+        if (rows == 0)
+        {
+            await transaction.RollbackAsync();
+            throw new InvalidOperationException("Identity is not linked to your account.");
+        }
+
+        await _LogIdentityAuditAsync(conn, effectivePrimary.Value, "unlink",
+            targetPlatform, targetExternalUserId, currentPlayerId.Value, transaction);
+
+        await transaction.CommitAsync();
+    }
+
+    public async Task UpsertPlayerAsync(string platform, string externalUserId, string displayName, string? avatarUrl)
+    {
+        await using var conn = await dataSource.OpenConnectionAsync();
+        await _UpsertPlayerAndGetIdAsync(conn, platform, externalUserId, displayName, avatarUrl, null);
+    }
+
+    public async Task UpsertDiscordUserAsync(string discordId, string displayName, string? avatarUrl)
+    {
+        await using var conn = await dataSource.OpenConnectionAsync();
+        await _UpsertPlayerAndGetIdAsync(conn, "Discord", discordId, displayName, avatarUrl, null);
+    }
+
+    // --- Private helpers ---
+
+    private static async Task<Guid?> _ResolvePlayerIdAsync(NpgsqlConnection conn, string platform, string externalUserId)
+    {
+        return await conn.QuerySingleOrDefaultAsync<Guid?>(
+            """
+            SELECT id FROM players
+            WHERE platform = @Platform AND external_user_id = @ExternalUserId
+            """,
+            new { Platform = platform, ExternalUserId = externalUserId });
+    }
+
+    private static async Task<Guid?> _ResolveEffectivePlayerIdAsync(NpgsqlConnection conn, string platform, string externalUserId)
+    {
+        var playerId = await _ResolvePlayerIdAsync(conn, platform, externalUserId);
+        if (playerId is null)
+            return null;
+
+        var primaryId = await conn.QuerySingleOrDefaultAsync<Guid?>(
+            """
+            SELECT primary_player_id FROM player_links
+            WHERE secondary_player_id = @PlayerId
+            """,
+            new { PlayerId = playerId.Value });
+
+        return primaryId ?? playerId;
+    }
+
+    private static async Task<Guid> _UpsertPlayerAndGetIdAsync(
+        NpgsqlConnection conn, string platform, string externalUserId,
+        string displayName, string? avatarUrl, NpgsqlTransaction? transaction)
+    {
+        return await conn.QuerySingleAsync<Guid>(
+            """
+            INSERT INTO players (display_name, platform, external_user_id, external_username, avatar_url)
+            VALUES (@DisplayName, @Platform, @ExternalUserId, @DisplayName, @AvatarUrl)
+            ON CONFLICT (platform, external_user_id)
+            WHERE platform IS NOT NULL AND external_user_id IS NOT NULL
+            DO UPDATE
+            SET display_name = EXCLUDED.display_name,
+                external_username = EXCLUDED.external_username,
+                avatar_url = COALESCE(EXCLUDED.avatar_url, players.avatar_url)
+            RETURNING id
+            """,
+            new { DisplayName = displayName, Platform = platform, ExternalUserId = externalUserId, AvatarUrl = avatarUrl },
+            transaction);
+    }
+
+    private static async Task _LogIdentityAuditAsync(
+        NpgsqlConnection conn, Guid playerId, string action,
+        string? targetPlatform, string? targetExternalUserId,
+        Guid? performedByPlayerId, NpgsqlTransaction? transaction)
+    {
+        await conn.ExecuteAsync(
+            """
+            INSERT INTO identity_audit_log (player_id, action, target_platform, target_external_user_id, performed_by_player_id)
+            VALUES (@PlayerId, @Action, @TargetPlatform, @TargetExternalUserId, @PerformedByPlayerId)
+            """,
+            new { PlayerId = playerId, Action = action, TargetPlatform = targetPlatform, TargetExternalUserId = targetExternalUserId, PerformedByPlayerId = performedByPlayerId },
+            transaction);
+    }
 }

src/GmRelay.Web/packages.lock.json

@@ -243,7 +243,11 @@
         }
       },
       "gmrelay.shared": {
-        "type": "Project"
+        "type": "Project",
+        "dependencies": {
+          "Dapper": "[2.1.72, )",
+          "Npgsql": "[10.0.2, )"
+        }
       }
     }
   }

src/GmRelay.Web/wwwroot/app.css

@@ -1619,3 +1619,78 @@ body.telegram-mini-app .session-card-mobile {
         display: flex;
     }
 }
+
+/* === Discord Login Button === */
+.login-btn-discord {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 0.75rem;
+    width: 100%;
+    padding: 0.75rem 1.25rem;
+    border-radius: var(--radius-md);
+    font-weight: 500;
+    font-size: 0.9375rem;
+    text-decoration: none;
+    transition: all 0.2s ease;
+    background-color: #5865F2;
+    color: white;
+    border: none;
+    cursor: pointer;
+}
+
+.login-btn-discord:hover {
+    background-color: #4752C4;
+    transform: translateY(-1px);
+}
+
+.login-btn-discord:active {
+    transform: translateY(0);
+}
+
+.login-btn-discord .login-btn-icon {
+    width: 20px;
+    height: 20px;
+    flex-shrink: 0;
+}
+
+.login-divider {
+    display: flex;
+    align-items: center;
+    margin: 1.25rem 0;
+    color: var(--text-muted);
+    font-size: 0.875rem;
+}
+
+.login-divider::before,
+.login-divider::after {
+    content: "";
+    flex: 1;
+    height: 1px;
+    background: var(--border-color);
+}
+
+.login-divider span {
+    padding: 0 1rem;
+}
+
+/* === Platform Indicator in Nav === */
+.nav-user-info {
+    display: flex;
+    flex-direction: column;
+    gap: 0.125rem;
+}
+
+.nav-user-platform {
+    font-size: 0.6875rem;
+    color: var(--text-muted);
+    text-transform: uppercase;
+    letter-spacing: 0.025em;
+}
+
+.nav-user-avatar img {
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+    border-radius: 50%;
+}

tests/GmRelay.Bot.Tests/Discord/DiscordNewSessionHandlerTests.cs

@@ -20,11 +20,14 @@ public sealed class DiscordNewSessionHandlerTests
     [Fact]
     public void ParseTimeInput_ShouldParseDiscordDateFormat()
     {
-        var result = DiscordNewSessionHandler.ParseTimeInput("2026-05-20 19:30");
+        var expected = FutureDateAt1930();
+        var result = DiscordNewSessionHandler.ParseTimeInput(
+            expected.ToString("yyyy-MM-dd HH:mm", System.Globalization.CultureInfo.InvariantCulture));
+
         Assert.True(result.IsSuccess);
-        Assert.Equal(2026, result.Value.Year);
+        Assert.Equal(expected.Year, result.Value.Year);
-        Assert.Equal(5, result.Value.Month);
+        Assert.Equal(expected.Month, result.Value.Month);
-        Assert.Equal(20, result.Value.Day);
+        Assert.Equal(expected.Day, result.Value.Day);
         Assert.Equal(19, result.Value.Hour);
         Assert.Equal(30, result.Value.Minute);
     }
@@ -39,11 +42,14 @@ public sealed class DiscordNewSessionHandlerTests
     [Fact]
     public void ParseTimeInput_ShouldParseRussianDateFormat()
     {
-        var result = DiscordNewSessionHandler.ParseTimeInput("20.05.2026 19:30");
+        var expected = FutureDateAt1930();
+        var result = DiscordNewSessionHandler.ParseTimeInput(
+            expected.ToString("dd.MM.yyyy HH:mm", System.Globalization.CultureInfo.InvariantCulture));
+
         Assert.True(result.IsSuccess);
-        Assert.Equal(2026, result.Value.Year);
+        Assert.Equal(expected.Year, result.Value.Year);
-        Assert.Equal(5, result.Value.Month);
+        Assert.Equal(expected.Month, result.Value.Month);
-        Assert.Equal(20, result.Value.Day);
+        Assert.Equal(expected.Day, result.Value.Day);
     }
 
     [Fact]
@@ -141,4 +147,17 @@ public sealed class DiscordNewSessionHandlerTests
         Assert.Contains("DiscordSessionBatchRenderer.Render", source, StringComparison.Ordinal);
         Assert.Contains("WithEmbeds", source, StringComparison.Ordinal);
     }
+
+    private static DateTimeOffset FutureDateAt1930()
+    {
+        var future = DateTimeOffset.UtcNow.AddDays(7);
+        return new DateTimeOffset(
+            future.Year,
+            future.Month,
+            future.Day,
+            19,
+            30,
+            0,
+            TimeSpan.Zero);
+    }
 }

tests/GmRelay.Bot.Tests/Discord/DiscordPlatformMessengerTests.cs

@@ -7,9 +7,13 @@ namespace GmRelay.Bot.Tests.Discord;
 public sealed class DiscordPlatformMessengerTests
 {
     [Fact]
-    public void Constructor_ShouldAcceptRestClient()
+    public void Constructor_ShouldAcceptRestClientAndReplyCache()
     {
-        var constructor = typeof(DiscordPlatformMessenger).GetConstructor(new[] { typeof(NetCord.Rest.RestClient) });
+        var constructor = typeof(DiscordPlatformMessenger).GetConstructor(new[]
+        {
+            typeof(NetCord.Rest.RestClient),
+            typeof(DiscordInteractionReplyCache)
+        });
         Assert.NotNull(constructor);
     }
 
@@ -18,4 +22,45 @@ public sealed class DiscordPlatformMessengerTests
     {
         Assert.True(typeof(IPlatformMessenger).IsAssignableFrom(typeof(DiscordPlatformMessenger)));
     }
+
+    [Fact]
+    public async Task AnswerInteractionAsync_ShouldStoreReplyForComponentModule()
+    {
+        var source = await ReadRepositoryFileAsync("src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs");
+
+        Assert.Contains("DiscordInteractionReplyCache", source, StringComparison.Ordinal);
+        Assert.Contains("interactionReplies.Store(reply)", source, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task DiscordPlatformMessenger_ShouldSupportSchedulerNotifications()
+    {
+        var source = await ReadRepositoryFileAsync("src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs");
+
+        Assert.Contains("SendConfirmationRequestAsync", source, StringComparison.Ordinal);
+        Assert.Contains("UpdateConfirmationRequestAsync", source, StringComparison.Ordinal);
+        Assert.Contains("SendJoinLinkNotificationAsync", source, StringComparison.Ordinal);
+        Assert.Contains("SendDirectSessionNotificationAsync", source, StringComparison.Ordinal);
+        Assert.Contains("UpdateRescheduleVoteAsync", source, StringComparison.Ordinal);
+        Assert.Contains("DiscordSessionBatchRenderer", source, StringComparison.Ordinal);
+        Assert.Contains("DiscordRescheduleVotingRenderer", source, StringComparison.Ordinal);
+        Assert.Contains("GetDMChannelAsync", source, StringComparison.Ordinal);
+    }
+
+    private static async Task<string> ReadRepositoryFileAsync(string relativePath)
+    {
+        var directory = new DirectoryInfo(AppContext.BaseDirectory);
+        while (directory is not null)
+        {
+            var candidate = Path.Combine(directory.FullName, relativePath);
+            if (File.Exists(candidate))
+            {
+                return await File.ReadAllTextAsync(candidate);
+            }
+
+            directory = directory.Parent;
+        }
+
+        throw new FileNotFoundException($"Could not locate repository file '{relativePath}'.");
+    }
 }

tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs

@@ -61,7 +61,7 @@ public sealed class DiscordProjectStructureTests
         var prChecks = File.ReadAllText(Path.Combine(repoRoot, ".gitea", "workflows", "pr-checks.yml"));
         var deploy = File.ReadAllText(Path.Combine(repoRoot, ".gitea", "workflows", "deploy.yml"));
 
-        Assert.Contains("gmrelay-discord-bot:2.4.0", compose);
+        Assert.Contains("gmrelay-discord-bot:3.0.1", compose);
         Assert.Contains("Discord__Token=${DISCORD_BOT_TOKEN:?Set DISCORD_BOT_TOKEN in .env}", compose);
         Assert.Contains("src/GmRelay.DiscordBot/Dockerfile", deploy);
         Assert.Contains("DISCORD_BOT_TOKEN", deploy);
@@ -75,13 +75,39 @@ public sealed class DiscordProjectStructureTests
     {
         var repoRoot = GetRepoRoot();
 
-        Assert.Contains("<Version>2.4.0</Version>", File.ReadAllText(Path.Combine(repoRoot, "Directory.Build.props")));
+        Assert.Contains("<Version>3.0.1</Version>", File.ReadAllText(Path.Combine(repoRoot, "Directory.Build.props")));
-        Assert.Contains("VERSION: 2.4.0", File.ReadAllText(Path.Combine(repoRoot, ".gitea", "workflows", "deploy.yml")));
+        Assert.Contains("VERSION: 3.0.1", File.ReadAllText(Path.Combine(repoRoot, ".gitea", "workflows", "deploy.yml")));
-        Assert.Contains("gmrelay-bot:2.4.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
+        Assert.Contains("gmrelay-bot:3.0.1", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
-        Assert.Contains("gmrelay-web:2.4.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
+        Assert.Contains("gmrelay-web:3.0.1", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
-        Assert.Contains("gmrelay-discord-bot:2.4.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
+        Assert.Contains("gmrelay-discord-bot:3.0.1", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
         Assert.Contains(
-            "v2.4.0",
+            "v3.0.1",
             File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.Web", "Components", "Layout", "NavMenu.razor")));
     }
+
+    [Fact]
+    public void EnvExample_ShouldContainDiscordBotToken()
+    {
+        var repoRoot = GetRepoRoot();
+        var envExample = File.ReadAllText(Path.Combine(repoRoot, ".env.example"));
+
+        Assert.Contains("DISCORD_BOT_TOKEN", envExample);
+    }
+
+    [Fact]
+    public void Compose_ShouldIncludeDiscordHealthcheck()
+    {
+        var repoRoot = GetRepoRoot();
+        var compose = File.ReadAllText(Path.Combine(repoRoot, "compose.yaml"));
+
+        var discordIndex = compose.IndexOf("discord:", StringComparison.Ordinal);
+        Assert.True(discordIndex >= 0, "compose.yaml should contain discord service");
+
+        var nextServiceIndex = compose.IndexOf("  web:", StringComparison.Ordinal);
+        var discordBlock = compose[discordIndex..nextServiceIndex];
+
+        Assert.Contains("healthcheck:", discordBlock);
+        Assert.Contains("test:", discordBlock);
+        Assert.Contains("localhost:8082/health", discordBlock);
+    }
 }

tests/GmRelay.Bot.Tests/Discord/DiscordRescheduleDeadlineBoundaryTests.cs

@@ -0,0 +1,31 @@
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordRescheduleDeadlineBoundaryTests
+{
+    [Fact]
+    public async Task DiscordDeadlineService_ShouldUsePlatformMessengerForMessageUpdates()
+    {
+        var source = await ReadRepositoryFileAsync(
+            "src/GmRelay.DiscordBot/Features/Sessions/DiscordRescheduleVotingDeadlineService.cs");
+
+        Assert.DoesNotContain("RestClient", source, StringComparison.Ordinal);
+        Assert.DoesNotContain("ModifyMessageAsync", source, StringComparison.Ordinal);
+        Assert.Contains("UpdateRescheduleVoteAsync", source, StringComparison.Ordinal);
+        Assert.Contains("IPlatformMessenger", source, StringComparison.Ordinal);
+    }
+
+    private static async Task<string> ReadRepositoryFileAsync(string relativePath)
+    {
+        var directory = new DirectoryInfo(AppContext.BaseDirectory);
+        while (directory is not null)
+        {
+            var candidate = Path.Combine(directory.FullName, relativePath);
+            if (File.Exists(candidate))
+                return await File.ReadAllTextAsync(candidate);
+
+            directory = directory.Parent;
+        }
+
+        throw new FileNotFoundException($"Could not locate repository file '{relativePath}'.");
+    }
+}

tests/GmRelay.Bot.Tests/Discord/DiscordSessionInteractionMapperTests.cs

@@ -0,0 +1,96 @@
+using GmRelay.DiscordBot.Features.Sessions;
+using GmRelay.Shared.Features.Sessions.CreateSession;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordSessionInteractionMapperTests
+{
+    [Fact]
+    public void TryParseCustomId_WhenActionAndSessionIdMatch_ReturnsSessionId()
+    {
+        var sessionId = Guid.NewGuid();
+
+        var result = DiscordSessionInteractionMapper.TryParseCustomId(
+            $"join_session:{sessionId}",
+            "join_session",
+            out var parsedSessionId);
+
+        Assert.True(result);
+        Assert.Equal(sessionId, parsedSessionId);
+    }
+
+    [Fact]
+    public void TryParseCustomId_WhenActionDoesNotMatch_ReturnsFalse()
+    {
+        var result = DiscordSessionInteractionMapper.TryParseCustomId(
+            $"leave_session:{Guid.NewGuid()}",
+            "join_session",
+            out _);
+
+        Assert.False(result);
+    }
+
+    [Fact]
+    public void TryParseCustomId_WhenSessionIdIsInvalid_ReturnsFalse()
+    {
+        var result = DiscordSessionInteractionMapper.TryParseCustomId(
+            "join_session:not-a-guid",
+            "join_session",
+            out _);
+
+        Assert.False(result);
+    }
+
+    [Fact]
+    public void CreateJoinCommand_ShouldBuildPlatformNeutralDiscordCommand()
+    {
+        var sessionId = Guid.NewGuid();
+        var input = CreateInput(sessionId, displayName: "Alice GM");
+
+        JoinSessionCommand command = DiscordSessionInteractionMapper.CreateJoinCommand(input);
+
+        Assert.Equal(sessionId, command.SessionId);
+        Assert.Equal("interaction-1", command.InteractionId);
+        Assert.Equal(PlatformKind.Discord, command.User.Platform);
+        Assert.Equal("42", command.User.ExternalUserId);
+        Assert.Equal("Alice GM", command.User.DisplayName);
+        Assert.Equal("alice", command.User.ExternalUsername);
+        Assert.Equal(PlatformKind.Discord, command.Group.Platform);
+        Assert.Equal("guild-1", command.Group.ExternalGroupId);
+        Assert.Equal("channel-1", command.Group.ExternalChannelId);
+        Assert.Equal(PlatformKind.Discord, command.ScheduleMessage.Platform);
+        Assert.Equal("guild-1", command.ScheduleMessage.ExternalGroupId);
+        Assert.Equal("message-1", command.ScheduleMessage.ExternalMessageId);
+    }
+
+    [Fact]
+    public void CreateLeaveCommand_ShouldBuildPlatformNeutralDiscordCommand()
+    {
+        var sessionId = Guid.NewGuid();
+        var input = CreateInput(sessionId, displayName: null);
+
+        LeaveSessionCommand command = DiscordSessionInteractionMapper.CreateLeaveCommand(input);
+
+        Assert.Equal(sessionId, command.SessionId);
+        Assert.Equal("interaction-1", command.InteractionId);
+        Assert.Equal(PlatformKind.Discord, command.User.Platform);
+        Assert.Equal("42", command.User.ExternalUserId);
+        Assert.Equal("alice", command.User.DisplayName);
+        Assert.Equal("alice", command.User.ExternalUsername);
+        Assert.Equal("guild-1", command.Group.ExternalGroupId);
+        Assert.Equal("channel-1", command.Group.ExternalChannelId);
+        Assert.Equal("message-1", command.ScheduleMessage.ExternalMessageId);
+    }
+
+    private static DiscordSessionInteractionInput CreateInput(Guid sessionId, string? displayName)
+        => new(
+            SessionId: sessionId,
+            InteractionId: "interaction-1",
+            GuildId: "guild-1",
+            ChannelId: "channel-1",
+            MessageId: "message-1",
+            UserId: 42,
+            Username: "alice",
+            DisplayName: displayName);
+}