chore: bump version to 2.1.0

Synchronize version across all 4 files:
- Directory.Build.props
- compose.yaml (bot + web images)
- .gitea/workflows/deploy.yml
- NavMenu.razor

Bump version → 2.1.0

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

.env.example

@@ -15,3 +15,10 @@ POSTGRES_PASSWORD=StrongPasswordForDatabase
 
 # Локальный порт веб-интерфейса GM-Relay
 GMRELAY_WEB_PORT=8080
+
+# === Backup ===
+# Сколько дней хранить дампы PostgreSQL (default: 7)
+BACKUP_RETENTION_DAYS=7
+
+# Имя Docker volume для резервных копий БД
+BACKUP_VOLUME_NAME=game_pgbackups

.gitea/workflows/deploy.yml

@@ -6,7 +6,7 @@ on:
       - main 
 
 env:
-  VERSION: 1.10.0
+  VERSION: 2.1.0
 
 jobs:
   # ЧАСТЬ 1: Собираем образы и кладем в Gitea (чтобы делиться с ребятами)
@@ -51,9 +51,34 @@ jobs:
           docker push git.codeanddice.ru/toutsu/gmrelay-web:latest
           docker push git.codeanddice.ru/toutsu/gmrelay-web:${{ env.VERSION }}
 
+  # ЧАСТЬ 1.5: Сканируем собранные образы на уязвимости
+  scan-images:
+    needs: build-and-push
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Trivy
+        run: |
+          curl -sfL https://raw.githubusercontent.com/aquasecurity/trivy/main/contrib/install.sh | sh -s -- -b /usr/local/bin
+
+      - name: Scan Bot image
+        run: |
+          trivy image \
+            --severity HIGH,CRITICAL \
+            --exit-code 1 \
+            --format table \
+            git.codeanddice.ru/toutsu/gmrelay-bot:${{ env.VERSION }}
+
+      - name: Scan Web image
+        run: |
+          trivy image \
+            --severity HIGH,CRITICAL \
+            --exit-code 1 \
+            --format table \
+            git.codeanddice.ru/toutsu/gmrelay-web:${{ env.VERSION }}
+
   # ЧАСТЬ 2: Запускаем эти образы на самом сервере
   deploy:
-    needs: build-and-push
+    needs: scan-images
     runs-on: ubuntu-latest # Тот же локальный раннер
     steps:
       - name: Checkout repository

.gitea/workflows/pr-checks.yml

@@ -0,0 +1,78 @@
+name: PR Checks
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test-and-build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '10.0.x'
+
+      - name: Restore dependencies
+        run: dotnet restore
+
+      - name: Verify Trivy dependency scan inputs
+        run: |
+          lock_count="$(find . -name packages.lock.json -not -path "*/bin/*" -not -path "*/obj/*" | tee trivy-targets.txt | wc -l)"
+          echo "Trivy NuGet lock files: ${lock_count}"
+          if [ "${lock_count}" -eq 0 ]; then
+            echo "::error::No packages.lock.json files found. Trivy would scan 0 NuGet dependency files."
+            exit 1
+          fi
+
+      # ── Linting ──
+
+      - name: Lint C# code style
+        run: dotnet format --verify-no-changes --verbosity diagnostic
+
+      # ── Security ──
+
+      - name: Check NuGet packages for vulnerabilities
+        run: |
+          dotnet list package --vulnerable --include-transitive 2>&1 | tee nuget-audit.txt
+          if grep -qi "has the following vulnerable packages" nuget-audit.txt; then
+            echo "::error::Vulnerable NuGet packages found!"
+            exit 1
+          fi
+          echo "No vulnerable packages detected."
+
+      - name: Install Trivy
+        run: |
+          curl -sfL https://raw.githubusercontent.com/aquasecurity/trivy/main/contrib/install.sh | sh -s -- -b /usr/local/bin
+          trivy --version
+
+      - name: Trivy filesystem security scan
+        run: |
+          set +e
+          trivy fs --scanners vuln,misconfig,secret --exit-code 1 --severity HIGH,CRITICAL . 2>&1 | tee trivy-scan.log
+          trivy_exit="${PIPESTATUS[0]}"
+          if ! grep -Eq "Number of language-specific files[[:space:]]+num=[1-9][0-9]*" trivy-scan.log; then
+            echo "::error::Trivy did not detect any language-specific dependency files."
+            exit 1
+          fi
+          exit "${trivy_exit}"
+
+      # ── Build (includes SAST via SecurityCodeScan Roslyn analyzer) ──
+
+      - name: Build Shared
+        run: dotnet build src/GmRelay.Shared/GmRelay.Shared.csproj --no-restore
+
+      - name: Build Bot (compile check, includes SAST)
+        run: dotnet build src/GmRelay.Bot/GmRelay.Bot.csproj --no-restore
+
+      - name: Build Web (compile check, includes SAST)
+        run: dotnet build src/GmRelay.Web/GmRelay.Web.csproj --no-restore
+
+      # ── Tests ──
+
+      - name: Run tests
+        run: dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --verbosity normal

.hermes/plans/gmrelay-issue-19.md

@@ -1,250 +0,0 @@
-# Issue #19: Выровнять /newsession с batch-сценарием лендинга
-
-> **Goal:** Сделать `/newsession` атомарным: либо весь batch создаётся целиком, либо ничего — с понятным сообщением об ошибках. Убрать создание частичных сессий при наличии любых ошибок ввода.
-
-**Architecture:** Изменить `NewSessionParseResult.IsValid` так, чтобы он учитывал ЛЮБЫЕ parse-ошибки (некорректные даты, лимиты, повторы, прошедшие даты). Обновить `CreateSessionHandler`, чтобы при `!IsValid` отправлялось одно детальное сообщение с перечислением ошибок и help-шаблоном, и creation прерывался до транзакции БД.
-
-**Tech Stack:** C#, .NET, Dapper, Telegram.Bot, xUnit
-
----
-
-### Task 1: Добавить `HasErrors` и ужесточить `IsValid`
-
-**Objective:** Запретить частичное создание: `IsValid == false`, если есть хоть одна ошибка парсинга.
-
-**Files:**
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/NewSessionCommandParser.cs`
-- Test: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/NewSessionCommandParserTests.cs`
-
-**Step 1: RED — написать failing test**
-
-Добавить в конец `NewSessionCommandParserTests.cs`:
-
-```csharp
-[Fact]
-public void Parse_ShouldBeInvalid_WhenAnyErrorsPresent()
-{
-    var nowUtc = new DateTimeOffset(2026, 4, 23, 12, 0, 0, TimeSpan.Zero);
-    var text = """
-        Название: Delta Green
-        Время: 25.04.2026 19:30
-        Время: 31.04.2026 19:30
-        Ссылка: https://example.test/dg
-        """;
-
-    var result = NewSessionCommandParser.Parse(text, nowUtc);
-
-    Assert.True(result.HasErrors);
-    Assert.False(result.IsValid);
-}
-```
-
-**Step 2: Run test and verify RED**
-
-```bash
-cd /repo && dotnet test tests/GmRelay.Bot.Tests --filter "FullyQualifiedName~NewSessionCommandParserTests" -v n
-```
-Expected: `HasErrors` property not found → compile error or FAIL.
-
-**Step 3: GREEN — minimal implementation**
-
-В `NewSessionCommandParser.cs`, в `NewSessionParseResult`, заменить `IsValid` на:
-
-```csharp
-public bool HasErrors =>
-    PastTimeInputs.Count > 0 ||
-    InvalidTimeInputs.Count > 0 ||
-    InvalidSeatLimitInputs.Count > 0 ||
-    InvalidRecurringInputs.Count > 0;
-
-public bool IsValid =>
-    !string.IsNullOrWhiteSpace(Title) &&
-    !string.IsNullOrWhiteSpace(Link) &&
-    ScheduledTimes.Count > 0 &&
-    !HasErrors;
-```
-
-**Step 4: Run test and verify GREEN**
-
-```bash
-cd /repo && dotnet test tests/GmRelay.Bot.Tests --filter "FullyQualifiedName~NewSessionCommandParserTests" -v n
-```
-Expected: 7 passed (включая новый).
-
-**Step 5: Commit**
-
-```bash
-git add src/GmRelay.Bot/Features/Sessions/CreateSession/NewSessionCommandParser.cs
-git add tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/NewSessionCommandParserTests.cs
-git commit -m "feat(#19): add HasErrors to prevent partial batch creation"
-```
-
----
-
-### Task 2: Обновить существующий тест на Past/Invalid times
-
-**Objective:** Старый тест ожидал `IsValid == true` при partial invalid — теперь это баг, нужно обновить assertion.
-
-**Files:**
-- Modify: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/NewSessionCommandParserTests.cs:114`
-
-**Step 1: Write failing expectation first**
-
-Заменить в методе `Parse_ShouldCollectPastAndInvalidTimes` (примерно строка 114):
-
-```csharp
-// Было:
-Assert.True(result.IsValid);
-// Стало:
-Assert.False(result.IsValid);
-```
-
-**Step 2: Run test and verify RED**
-
-```bash
-cd /repo && dotnet test tests/GmRelay.Bot.Tests --filter "Parse_ShouldCollectPastAndInvalidTimes" -v n
-```
-Expected: FAIL — expected False, actual True.
-
-**Step 3: Fix already done in Task 1**
-
-Task 1 уже изменил `IsValid`. Перезапустить тест.
-
-**Step 4: Run test and verify GREEN**
-
-```bash
-cd /repo && dotnet test tests/GmRelay.Bot.Tests --filter "Parse_ShouldCollectPastAndInvalidTimes" -v n
-```
-Expected: PASS.
-
-**Step 5: Commit**
-
-```bash
-git add tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/NewSessionCommandParserTests.cs
-git commit -m "test(#19): update assertion - partial invalid means invalid"
-```
-
----
-
-### Task 3: Обновить `CreateSessionHandler` для атомарной валидации и единого сообщения об ошибках
-
-**Objective:** Убрать разбросанные warning-сообщения. При любых ошибках — одно сообщение с перечнем ошибок + help-шаблон. Не создавать сессии.
-
-**Files:**
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/CreateSessionHandler.cs`
-
-**Step 1: RED — напишем интеграционный поведенческий тест (опционально, landing test уже покрывает happy path)**
-
-Просто запустим landing promise smoke test и убедимся, что он ещё green (happy path не сломан).
-
-```bash
-cd /repo && dotnet test tests/GmRelay.Bot.Tests --filter "TelegramLandingPromisesSmokeTests" -v n
-```
-Expected: PASS.
-
-**Step 2: GREEN — minimal change in handler**
-
-В `CreateSessionHandler.cs`, метод `HandleAsync`, заменить начало (строки 19–59) на:
-
-```csharp
-var parseResult = NewSessionCommandParser.Parse(message.Text ?? message.Caption, DateTimeOffset.UtcNow);
-
-var errorMessages = new List<string>();
-
-foreach (var timeInput in parseResult.PastTimeInputs)
-    errorMessages.Add($"⚠️ Дата {timeInput} находится в прошлом и будет пропущена.");
-
-foreach (var timeInput in parseResult.InvalidTimeInputs)
-    errorMessages.Add($"⚠️ Некорректный формат времени '{timeInput}'. Пропущено.");
-
-foreach (var seatLimitInput in parseResult.InvalidSeatLimitInputs)
-    errorMessages.Add($"⚠️ Некорректный лимит мест '{seatLimitInput}'. Укажите целое число больше 0.");
-
-foreach (var recurringInput in parseResult.InvalidRecurringInputs)
-    errorMessages.Add($"⚠️ Некорректный повтор расписания '{recurringInput}'. Укажите число игр 1–52 и шаг 1–365 дней.");
-
-if (!parseResult.IsValid)
-{
-    var helpText = """
-        ❌ Не удалось распознать формат. Пожалуйста, используйте шаблон:
-
-        /newsession
-        Название: My Game
-        Время: 15.05.2026 19:30
-        Время: 22.05.2026 19:30
-        Мест: 4
-        Ссылка: https://link
-        Картинка: https://cover
-
-        Для повтора можно указать одну дату и строки:
-        Игр: 4
-        Интервал: 7
-        """;
-
-    if (errorMessages.Count > 0)
-    {
-        helpText = string.Join('\n', errorMessages) + "\n\n" + helpText;
-    }
-
-    await botClient.SendMessage(
-        chatId: message.Chat.Id,
-        text: helpText,
-        cancellationToken: cancellationToken);
-    return;
-}
-```
-
-**Step 3: Build and verify**
-
-```bash
-cd /repo && dotnet build src/GmRelay.Bot
-```
-Expected: Build succeeded.
-
-**Step 4: Run all relevant tests**
-
-```bash
-cd /repo && dotnet test tests/GmRelay.Bot.Tests --filter "FullyQualifiedName~CreateSession|FullyQualifiedName~Landing" -v n
-```
-Expected: All passed.
-
-**Step 5: Commit**
-
-```bash
-git add src/GmRelay.Bot/Features/Sessions/CreateSession/CreateSessionHandler.cs
-git commit -m "feat(#19): atomic validation with detailed error message in /newsession"
-```
-
----
-
-### Task 4: Проверить полный test suite на регрессии
-
-**Objective:** Убедиться, что изменения не сломали существующие тесты.
-
-**Files:**
-- Test: все тесты проекта `GmRelay.Bot.Tests`
-
-**Step 1: Run full test suite**
-
-```bash
-cd /repo && dotnet test tests/GmRelay.Bot.Tests -v n
-```
-Expected: All passed.
-
-**Step 2: Commit (if any test baseline updated)**
-
-Если всё зелёное — commit message:
-```bash
-git commit --allow-empty -m "test(#19): verify full suite green after atomic validation"
-```
-
----
-
-## Verification Checklist
-
-- [ ] `NewSessionCommandParser.Parse` возвращает `IsValid = false` при любых ошибках (past/invalid times, seat limits, recurring).
-- [ ] `HasErrors` true ↔ есть хотя бы одна ошибка.
-- [ ] `CreateSessionHandler` не открывает БД-транзакцию, если `!IsValid`.
-- [ ] Пользователь получает одно сообщение с перечислением ошибок + help.
-- [ ] Landing promise smoke test проходит (happy path не сломан).
-- [ ] Полный test suite зелёный.

Directory.Build.props

@@ -1,10 +1,15 @@
 <Project>
   <PropertyGroup>
-    <Version>1.10.0</Version>
+    <Version>2.1.0</Version>
     <TargetFramework>net10.0</TargetFramework>
     <LangVersion>preview</LangVersion>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
   </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="SecurityCodeScan.VS2019" Version="5.6.7" PrivateAssets="all" />
+  </ItemGroup>
 </Project>

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Toutsu
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.

README.md

@@ -4,225 +4,170 @@
 
 Проект разработан с упором на производительность, архитектуру Vertical Slice, Native AOT (для бота) и удобство развертывания с использованием .NET Aspire.
 
-**Текущая версия:** `v1.9.9`.
+**Текущая версия:** `v2.0.1`.
 
 ---
 
-## ✨ Ключевые возможности
+## ✨ Key Features
 
-### 🤖 Telegram Бот
+### 🤖 Telegram Bot
-- **📅 Создание расписаний (Batch Sessions)**: Создавайте сразу несколько игр одним сообщением (на неделю или месяц вперед).
+- **📅 Создание расписаний (Batch Sessions)**: Создавайте сразу несколько игр одним сообщением изменения (на недельный месяц в перед).
-- **🖼 Обложки расписаний**: К batch-посту можно прикрепить фото к `/newsession` или указать строку `Картинка: https://...`; бот отправит обложку перед сообщением записи.
+- **🖼 Обложки расписаний**: И batch-посту можно прикрепить фото к `/newsession` или указать строку `Картинка: https://...`; бот отправит обложку перед сообщением записи.
 - **⚡ Быстрые повторы расписания**: Для регулярной кампании можно указать одну дату, количество игр и интервал, а бот сам развернёт повторяющийся batch.
 - **✋ Интерактивная запись и выход**: Игроки записываются на конкретные даты и самостоятельно снимают запись нажатием одной кнопки.
 - **👥 Лимит мест и лист ожидания**: ГМ задаёт максимальный состав, бот не переполняет сессию, автоматически ведёт очередь ожидания и освобождённое место отдаёт первому ожидающему.
-- **📁 Поддержка Форумов (Telegram Topics)**: Бот автоматически создает тему во вложенных чатах Telegram под каждую новую пачку игр.
+- **📁 Поддержка Форумов (Telegram Topics)**: Если `/newsession` запущен в теме форума Telegram, расписание и групповые уведомления остаются в этой теме; при запуске из корня форума бот создает отдельную тему и сообщает о необходимости прав admin/Manage Topics, если их не хватает.
 - **❌ Управление сессиями**: Owner и назначенные co-GM могут создавать, отменять, удалять и переносить игры из Telegram через `/listsessions`; публичный пост записи показывает только кнопки игроков.
-- **🔄 Голосование за перенос**: При переносе сессии GM предлагает 2-3 новых времени и дедлайн, игроки голосуют кнопками, а бот показывает текущие результаты и применяет победивший вариант.
+- **🔄 Голосование за перенос**: Быстрый поиск свободного места с через свободное недель и кнопками новых времени и дедлайном.
-- **🔔 Персональные уведомления**: Игроки получают DM о RSVP за 24 часа, напоминание за 1 час, ссылку перед игрой, отмены и переносы; групповые уведомления при этом остаются.
+- **🔔 Уведомления**: Игрок получают за 24 часа, напоминание за 1 час, ссылку перед игрой, отмены и переносы; групповые уведомления при этом остаются.
-- **🗓 Экспорт в Календарь**: Генерация файла `.ics` для добавления всех игр в Google, Apple или Яндекс Календарь одной командой.
+- **🕐 Режим уведомлений batch**: Для каждой пачки можно выбрать `В группе и в личку` или `Только в группе`.
-- **🚀 Native AOT**: Скомпилирован в нативный бинарный файл. Мгновенный запуск и минимальное потребление памяти. Идеально для **Raspberry Pi**.
-
-### 🌐 Web Dashboard (Blazor Server)
-- **🔐 Авторизация через Telegram**: Безопасный вход с использованием Telegram Login Widget (HMAC-SHA256 валидация).
-- **📱 Telegram Mini App Dashboard**: Мобильная версия dashboard открывается прямо из Telegram, проверяет WebApp `initData` на сервере и использует те же права owner/co-GM, что и обычный Web Dashboard. Если Mini App попадает в fallback-вход, Telegram Login Widget авторизует пользователя callback-запросом внутри текущего WebView, а интерфейс учитывает safe-area телефона и верхнюю панель Telegram.
-- **📝 Удобное редактирование**: Веб-интерфейс для детального редактирования сессий, изменения дат, названий и статусов.
-- **🤝 Co-GM и делегирование**: Owner группы назначает помощников по Telegram ID, а co-GM получает доступ к управлению расписанием в Telegram и Web Dashboard.
-- **📋 Шаблоны кампаний**: Owner и co-GM управляют типовыми параметрами кампаний в отдельной вкладке `Шаблоны`, а на странице группы запускают новый повторяющийся batch из выбранного шаблона.
-- **🧩 Bulk-операции для Batch Sessions**: ГМ может обновить общий title/link, перенести всю пачку на фиксированный шаг и клонировать batch на следующую неделю или месяц.
-- **🔕 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.
-- **🕒 Управление временем**: UI адаптирован под московское время (UTC+3), в то время как база данных работает в UTC.
+
+### 🌐 Web Dashboard (Blazor Server)
+- **🔐 Авторизация через Telegram**: Telegram Login Widget с HMAC-SHA256 валидацией.
+- **📱 Telegram Mini App Dashboard**: Мобильная панель открывается из Telegram, проверяет `initData` на сервере, учитывает safe-area телефона и верхнюю панель Telegram.
+- **✏️ Редактирование**: Детальное изменение дат, названий и статусов сессий.
+- **🤝 Co-GM и делегирование**: Owner назначает помощников по Telegram ID; co-GM управляет расписанием, но **не может назначать других co-GM**.
+- **📋 Шаблоны кампаний**: Вкладка `Шаблоны` отдельно от страницы группы: сохранение типовых параметров и запуск нового batch из шаблона.
+- **📦 Bulk-операции для Batch Sessions**:
+  - обновить общий `title`/`link` у всей пачки;
+  - перенести пачку на фиксированный шаг в днях;
+  - клонировать batch на следующую неделю или месяц.
+- **⬆️ 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.
 
 ---
 
 ## 🛠 Технологический стек
 
-- **Язык**: C# 14 (.NET 10)
+| Компонент | Технология |
-- **Архитектура**: Vertical Slice Architecture, общая библиотека (`GmRelay.Shared`) для доменной логики.
+|---|---|
-- **Бот**: Telegram.Bot, Native AOT.
+| Язык | C# 14 (.NET 10) |
-- **Веб-интерфейс**: Blazor Server.
+| Архитектура | Vertical Slice + общая библиотека `GmRelay.Shared` |
-- **Оркестрация**: .NET Aspire (`GmRelay.AppHost`).
+| Бот | Telegram.Bot, **Native AOT** |
-- **База данных**: PostgreSQL
+| Веб | Blazor Server |
-- **ORM**: Dapper (с использованием Dapper.AOT для source generators).
+| Оркестрация | .NET Aspire (`GmRelay.AppHost`) |
-- **Миграции**: DbUp.
+| БД | PostgreSQL |
-- **Развертывание**: Docker Compose + Multi-arch (AMD64/ARM64).
+| ORM | Dapper + **Dapper.AOT** (source generators) |
+| Миграции | DbUp |
+| Развёртывание | Docker Compose, Multi-arch (**AMD64/ARM64**) |
+
+> [!NOTE]
+> При использовании Dapper в режиме Native AOT все SQL-запросы используют строго типизированные DTO; динамические типы (`dynamic`) не поддерживаются.
 
 ---
 
 ## 🚀 Быстрый старт (Docker Compose)
 
-Проект использует Docker Compose для одновременного запуска базы данных, бота и веб-интерфейса.
+**Требования:** Docker и Docker Compose.
-
-### 1. Подготовка
-Убедитесь, что у вас установлены **Docker** и **Docker Compose**.
-
-### 2. Настройка окружения
-Скопируйте файл-шаблон и заполните его значениями:
 
+### 1. Настройка окружения
 ```bash
 cp .env.example .env
 ```
 
-Отредактируйте `.env`:
+**Ключевые переменные `.env`:**
-
 ```env
-# Токен вашего бота от @BotFather (используется и для бота, и как секретный ключ для веб-авторизации)
+# Токен от @BotFather (используется ботом и как секретный ключ веб-авторизации)
 TELEGRAM_BOT_TOKEN=ваш_токен_здесь
 
-# Имя вашего бота в Telegram (без @), например: GmRelayBot.
+# Имя бота без @ (для Telegram Login Widget)
-# Найти его можно в информации о боте у @BotFather. 
-# Используется для работы виджета авторизации (Telegram Login Widget).
 TELEGRAM_BOT_USERNAME=ваше_имя_бота_здесь
 
-# HTTPS URL Mini App dashboard, например: https://your-domain.example/miniapp.
+# HTTPS URL Mini App, например https://your-domain.example/miniapp
-# Используется кнопкой меню Telegram и кнопкой /start.
 TELEGRAM_MINI_APP_URL=https://your-domain.example/miniapp
 
-# Пароль для базы данных PostgreSQL
 POSTGRES_PASSWORD=ваш_надежный_пароль
-
-# Локальный порт веб-интерфейса GM-Relay
 GMRELAY_WEB_PORT=8080
 ```
 
-*(Опционально)* Настройте домен Telegram бота в @BotFather командой `/setdomain` для работы виджета авторизации на вашем сайте.
+**Настройка в @BotFather:**
+- Команда `/setdomain` для работы виджета авторизации на вашем домене.
+- Для Mini App настройте домен Web Dashboard и menu button на URL из `TELEGRAM_MINI_APP_URL`.
+- Начиная с **v1.9.3** дополнительных действий для фикса входа не требуется: fallback выполняется внутри активного Telegram WebView по тому же HTTPS-адресу `/miniapp`.
 
-Для Telegram Mini App настройте в @BotFather домен Web Dashboard и menu button на URL из `TELEGRAM_MINI_APP_URL`. Бот также показывает кнопку `Открыть dashboard` в ответе на `/start`, если переменная задана. Начиная с v1.9.3 дополнительных действий в BotFather для фикса входа не требуется: URL остаётся тем же HTTPS-адресом `/miniapp`, а fallback-вход выполняется внутри активного Telegram WebView.
+### 2. Запуск
-
-### 3. Запуск
-Выполните команду:
 ```bash
 docker compose up -d
 ```
-Инфраструктура автоматически:
-- Создаст локальную Docker-сеть и volume PostgreSQL, если их ещё нет.
-- Поднимет PostgreSQL, доступный для контейнеров как `db:5432`.
-- Запустит бота (применив миграции БД).
-- Запустит веб-интерфейс на `http://localhost:8080` или другом порту из `GMRELAY_WEB_PORT`.
 
----
+**Автоматически выполняется:**
+- создание Docker-сети и volume PostgreSQL;
+- подъём PostgreSQL (`db:5432`);
+- запуск бота с плавной миграцией (DbUp);
+- запуск веб-приложения с подключением к БД и Telegram API.
 
-## ⚙️ Настройка бота в Telegram
+### 3. Первоначальная настройка
+1. Напишите боту `/start`.
+2. Создайте группу через `/newgroup`.
+3. Откройте Mini App или Web Dashboard для расширенного управления.
 
-Чтобы бот работал корректно:
+## 💾 Backup и восстановление
-1. **Добавьте бота в группу** (или Супергруппу/Форум).
-2. **Назначьте бота Администратором**. 
-3. **Необходимые права**:
-    * `Выбор тем` (Managed Topics) — **обязательно** для Форумов.
-    * `Отправка сообщений`.
-    * `Закрепление сообщений` — рекомендуется.
 
-> [!TIP]
+Проект включает автоматический ежедневный backup PostgreSQL через сервис `db-backup` в Docker Compose.
-> Owner группы определяется по первому человеку, который создал сессию в этой группе. Owner может назначать co-GM в Web Dashboard; owner и co-GM могут управлять сессиями через кнопки бота и веб-интерфейс.
 
----
+### Как это работает
-
+- **Каждый день в 03:00** выполняется `pg_dump` базы `gmrelay_db`.
-## 📝 Инструкция для Мастера
+- Дампы сжимаются (`gzip`) и сохраняются в volume `pgbackups` (`/backups`).
-
+- Формат имени: `gmrelay_db_YYYYMMDD_HHMMSS.sql.gz`.
-### Создание расписания игр
+- Ротация: по умолчанию хранятся последние **7 дней** (настраивается через `BACKUP_RETENTION_DAYS`).
-Используйте команду `/newsession` с описанием в следующем формате:
-
-```text
-/newsession
-Название: Легенды Берега Мечей (D&D 5e)
-Время: 15.05.2024 19:30
-Время: 22.05.2024 19:00
-Мест: 4
-Ссылка: https://discord.gg/invite-link
-Картинка: https://example.com/adventure-cover.jpg
-```
-
-Строка `Мест:` необязательна. Если она указана, игроки сверх лимита попадут в лист ожидания, а ГМ сможет повысить первого ожидающего через кнопку в Telegram или Web Dashboard.
-
-Строка `Картинка:` тоже необязательна. Вместо ссылки можно прикрепить фото к сообщению `/newsession` и поместить команду в подпись к фото; бот возьмёт прикреплённое изображение и отправит его перед расписанием.
-
-Для регулярной кампании можно не перечислять все даты вручную. Укажите одну строку `Время:`, количество игр и интервал в днях:
-
-```text
-/newsession
-Название: Kingmaker
-Время: 30.04.2026 19:30
-Игр: 6
-Интервал: 7
-Мест: 5
-Ссылка: https://discord.gg/invite-link
-```
-
-Бот создаст 6 игр с недельным шагом. Вместо `Игр:` также принимается `Сессий:` или `Повторов:`, вместо `Интервал:` — `Шаг:`.
-
-Игрок может самостоятельно снять запись кнопкой `🚪 Выйти` в сообщении расписания. Если он был в основном составе и в листе ожидания есть игроки, бот автоматически переводит первого ожидающего в основной состав и обновляет сообщение пачки.
-
-### Делегирование управления
-На странице группы Web Dashboard показывает owner и список co-GM. Owner может добавить помощника по Telegram ID, имени и username, а также снять роль co-GM. Назначенный co-GM видит группу в панели управления и может редактировать сессии, управлять batch-операциями, очередью, переносами и удалением игр, но не может назначать других co-GM.
-
-### Перенос сессии голосованием
-Owner или co-GM вызывает `/listsessions`, нажимает кнопку `⏰` у нужной сессии и отправляет в чат 2-3 варианта нового времени вместе с дедлайном:
-
-```text
-25.04.2026 19:30
-26.04.2026 18:00
-Дедлайн: 25.04.2026 12:00
-```
-
-Дедлайн должен быть в будущем и раньше первого предложенного времени. Участники выбирают один вариант кнопкой в Telegram, могут изменить голос до дедлайна и видят текущие результаты в сообщении голосования. По дедлайну бот выбирает вариант с наибольшим числом голосов, переносит сессию, сбрасывает RSVP и обновляет batch-сообщение. Если голосов нет или есть ничья, перенос отклоняется, а время сессии остаётся прежним.
-
-### Шаблоны и bulk-операции в Web Dashboard
-Вкладка `Шаблоны` в левом меню вынесена отдельно от страницы группы. Owner и co-GM выбирают группу, сохраняют шаблон кампании с названием, ссылкой, количеством игр, интервалом, лимитом мест и режимом уведомлений, а также удаляют устаревшие шаблоны.
-
-На странице группы Web Dashboard показывает только применение сохранённых шаблонов и отдельный блок для каждой пачки игр. Owner и co-GM могут:
-- создать новый batch из шаблона, выбрав только первую дату расписания;
-- обновить общий `title` и `link` сразу у всех сессий batch;
-- выбрать режим уведомлений: дублировать важные сообщения игрокам в личку или оставить только групповые уведомления;
-- перенести пачку, задав новую первую дату и фиксированный шаг между играми в днях;
-- клонировать batch на следующую неделю или следующий календарный месяц.
-
-После создания из шаблона или клонирования появляется новая пачка с новым Telegram-сообщением и пустым составом игроков. После редактирования или переноса исходное Telegram-сообщение расписания перерисовывается.
-
-Если включён режим `В группе и в личку`, бот дополнительно отправляет игрокам персональные сообщения о RSVP за 24 часа, напоминание за 1 час, ссылку перед стартом, отмену и перенос. Если Telegram не позволяет написать игроку в ЛС, бот логирует ошибку и продолжает отправку остальным участникам.
-
-### Telegram Mini App Dashboard
-Owner и co-GM могут открыть мобильный dashboard прямо из Telegram: через кнопку меню бота или кнопку `Открыть dashboard` после `/start`. Дополнительный пароль вводить не нужно: GM-Relay сам проверит вход через Telegram.
-
-Внутри открывается та же панель управления, только удобная для телефона. Можно смотреть свои группы, редактировать игры, управлять листом ожидания, запускать шаблоны и выполнять массовые действия с пачками игр. Чужие группы не появятся: dashboard показывает только те группы, где вы owner или co-GM.
-
-Если автоматический вход не сработал, Mini App покажет понятное сообщение и кнопку входа через Telegram. Нажмите её, подтвердите вход, и dashboard откроется в том же окне Telegram.
-
-### Другие команды
-- `/listsessions` — Показать список всех актуальных игр в этой группе. Для owner/co-GM команда также показывает кнопки отмены, переноса, повышения из листа ожидания и удаления.
-- `⏰` в панели `/listsessions` — Запустить голосование по 2-3 вариантам нового времени.
-- `/deletesession` — Удалить сессию.
-- `/exportcalendar` — Получить `.ics` файл с играми.
-- `/help` — Справка по формату.
-
----
-
-## 🏗 Разработка и запуск локально (.NET Aspire)
-
-Для локальной разработки проще всего использовать .NET Aspire:
-
-1. Установите [.NET 10 SDK](https://dotnet.microsoft.com/download/dotnet/10.0) и workload Aspire.
-2. Откройте решение `GM-Relay.slnx`.
-3. Установите переменные окружения (или user secrets) для `GmRelay.AppHost`.
-4. Запустите проект `GmRelay.AppHost`. Aspire Dashboard запустится автоматически, предоставляя удобный мониторинг БД, бота и веб-интерфейса.
-
-> [!NOTE]
-> При использовании **Dapper** в режиме Native AOT, все SQL-запросы используют строго типизированные DTO. Динамические типы (`dynamic`) не поддерживаются.
-
----
-
-## 🧪 Тестирование
-
-Основной набор проверок запускается командой:
 
+### Проверка бэкапов
 ```bash
-dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --collect:"XPlat Code Coverage"
+docker compose exec db-backup ls -la /backups
 ```
 
-Начиная с `v1.9.9`, тестовый набор включает функциональный smoke-сценарий обещаний лендинга для Telegram: batch-сессии на несколько дат, inline-кнопки записи/выхода, лимиты мест, waitlist, автоповышение игрока, голосование за перенос, direct-notification mode и перерисовку Telegram batch-поста после dashboard-изменений. Smoke работает через fake Telegram messenger и не требует внешнего Telegram API.
+### Ручное создание дампа
+```bash
+docker compose exec db-backup sh -c "pg_dump -h db -U gmrelay -d gmrelay_db | gzip > /backups/gmrelay_db_manual.sql.gz"
+```
+
+### Восстановление из бэкапа
+```bash
+# Использовать последний автоматический бэкап
+./scripts/restore.sh
+
+# Или указать конкретный файл
+./scripts/restore.sh backups/gmrelay_db_20260512_030000.sql.gz
+```
+
+> [!WARNING]
+> Восстановление **перезаписывает текущую базу данных**. Убедитесь, что вы понимаете последствия, прежде чем запускать `restore.sh`.
+
+### Переменные окружения (опциональные)
+```env
+BACKUP_RETENTION_DAYS=7
+BACKUP_VOLUME_NAME=game_pgbackups
+```
+
+---
+
+## 🗂 Структура репозитория
+
+```
+├── src/
+│   ├── GmRelay.AppHost/         # .NET Aspire orchestrator
+│   ├── GmRelay.Bot/             # Telegram-бот (Native AOT)
+│   ├── GmRelay.Migrator/        # DbUp-миграции
+│   ├── GmRelay.ServiceDefaults/  # Aspire service defaults
+│   ├── GmRelay.Shared/          # Общие доменные модели
+│   ├── GmRelay.Web/             # Blazor Server dashboard
+│   └── GmRelay.Worker/          # Background workers
+├── tests/
+│   └── GmRelay.Bot.Tests/       # xUnit + NSubstitute
+├── compose.yaml                  # Docker Compose (AMD64 + ARM64)
+└── .env.example                  # Шаблон переменных окружения
+```
 
 ---
 
 ## 📜 Лицензия
-Проект распространяется под лицензией MIT. Использование в некоммерческих целях приветствуется.
+
+MIT License. См. [LICENSE](./LICENSE).
+
+---
+
+*Построено с ❤️ для TTRPG-сообщества.*

compose.yaml

@@ -16,8 +16,40 @@ services:
       timeout: 3s
       retries: 10
 
+  db-backup:
+    image: postgres:17-alpine
+    restart: unless-stopped
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      POSTGRES_USER: gmrelay
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?Set POSTGRES_PASSWORD in .env}
+      POSTGRES_DB: gmrelay_db
+      PGPASSWORD: ${POSTGRES_PASSWORD:?Set POSTGRES_PASSWORD in .env}
+      BACKUP_RETENTION_DAYS: ${BACKUP_RETENTION_DAYS:-7}
+    volumes:
+      - pgbackups:/backups
+    networks:
+      - gmrelay
+    entrypoint: ["sh", "-c"]
+    command:
+      - |
+        cat > /usr/local/bin/backup.sh << 'EOF'
+        #!/bin/sh
+        set -e
+        TMPFILE="/tmp/backup_$$.sql"
+        pg_dump -h db -U gmrelay -d gmrelay_db > "$TMPFILE"
+        gzip "$TMPFILE"
+        mv "$TMPFILE.gz" "/backups/gmrelay_db_$(date +%Y%m%d_%H%M%S).sql.gz"
+        find /backups -name 'gmrelay_db_*.sql.gz' -type f -mtime +${BACKUP_RETENTION_DAYS} -delete
+        EOF
+        chmod +x /usr/local/bin/backup.sh
+        echo "0 3 * * * /usr/local/bin/backup.sh" | crontab -
+        crond -f
+
   bot:
-    image: git.codeanddice.ru/toutsu/gmrelay-bot:1.10.0
+    image: git.codeanddice.ru/toutsu/gmrelay-bot:2.1.0
     restart: always
     depends_on:
       db:
@@ -28,9 +60,14 @@ services:
       - "Telegram__MiniAppUrl=${TELEGRAM_MINI_APP_URL:-}"
     networks:
       - gmrelay
+    healthcheck:
+      test: ["CMD-SHELL", "wget -qO- http://localhost:8081/health || exit 1"]
+      interval: 10s
+      timeout: 5s
+      retries: 3
 
   web:
-    image: git.codeanddice.ru/toutsu/gmrelay-web:1.10.0
+    image: git.codeanddice.ru/toutsu/gmrelay-web:2.1.0
     restart: always
     depends_on:
       db:
@@ -46,12 +83,19 @@ services:
       - web_keys:/app/dataprotection-keys
     networks:
       - gmrelay
+    healthcheck:
+      test: ["CMD-SHELL", "wget -qO- http://localhost:8080/health || exit 1"]
+      interval: 10s
+      timeout: 5s
+      retries: 3
 
 volumes:
   pgdata:
     name: ${POSTGRES_VOLUME_NAME:-game_pgdata}
   web_keys:
     name: ${WEB_KEYS_VOLUME_NAME:-gmrelay_web_keys}
+  pgbackups:
+    name: ${BACKUP_VOLUME_NAME:-game_pgbackups}
 
 networks:
   gmrelay:

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

@@ -0,0 +1,560 @@
+# 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.

scripts/restore.sh

@@ -0,0 +1,77 @@
+#!/usr/bin/env bash
+# GM-Relay PostgreSQL Backup Restore Script
+# Usage: ./scripts/restore.sh [backup_file]
+# If no file is provided, uses the most recent backup.
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
+
+# Check required env
+if [ -z "${POSTGRES_PASSWORD:-}" ]; then
+    if [ -f "${PROJECT_ROOT}/.env" ]; then
+        # shellcheck source=/dev/null
+        set -a
+        . "${PROJECT_ROOT}/.env"
+        set +a
+    fi
+fi
+
+if [ -z "${POSTGRES_PASSWORD:-}" ]; then
+    echo "ERROR: POSTGRES_PASSWORD is not set. Please set it in your environment or .env file."
+    exit 1
+fi
+
+BACKUP_DIR="${PROJECT_ROOT}/backups"
+
+# Determine backup file
+if [ $# -ge 1 ]; then
+    BACKUP_FILE="$1"
+else
+    BACKUP_FILE=$(find "${BACKUP_DIR}" -name 'gmrelay_db_*.sql.gz' -type f -printf '%T+ %p\n' 2>/dev/null | sort -r | head -n1 | cut -d' ' -f2-)
+    if [ -z "${BACKUP_FILE}" ]; then
+        echo "ERROR: No backup files found in ${BACKUP_DIR}."
+        exit 1
+    fi
+fi
+
+if [ ! -f "${BACKUP_FILE}" ]; then
+    echo "ERROR: Backup file not found: ${BACKUP_FILE}"
+    exit 1
+fi
+
+echo "=================================================="
+echo "  GM-Relay PostgreSQL Restore"
+echo "=================================================="
+echo ""
+echo "Backup file: ${BACKUP_FILE}"
+echo "Database:    gmrelay_db"
+echo "User:        gmrelay"
+echo ""
+read -p "This will OVERWRITE the current database. Are you sure? [y/N] " CONFIRM
+
+if [[ ! "${CONFIRM}" =~ ^[Yy]$ ]]; then
+    echo "Restore cancelled."
+    exit 0
+fi
+
+echo ""
+echo "Restoring database from ${BACKUP_FILE}..."
+
+# Restore using docker compose exec to leverage the running postgres container
+COMPOSE_ARGS="-f ${PROJECT_ROOT}/compose.yaml"
+
+docker compose ${COMPOSE_ARGS} exec -T -e PGPASSWORD="${POSTGRES_PASSWORD}" db psql \
+    -U gmrelay \
+    -d gmrelay_db \
+    -c "DROP SCHEMA public CASCADE; CREATE SCHEMA public;" 2>/dev/null || true
+
+gunzip -c "${BACKUP_FILE}" | docker compose ${COMPOSE_ARGS} exec -T -e PGPASSWORD="${POSTGRES_PASSWORD}" db psql \
+    -U gmrelay \
+    -d gmrelay_db
+
+echo ""
+echo "=================================================="
+echo "  Restore completed successfully!"
+echo "=================================================="

src/GmRelay.AppHost/packages.lock.json

@@ -0,0 +1,687 @@
+{
+  "version": 1,
+  "dependencies": {
+    "net10.0": {
+      "Aspire.Dashboard.Sdk.win-x64": {
+        "type": "Direct",
+        "requested": "[13.2.1, )",
+        "resolved": "13.2.1",
+        "contentHash": "KLB9rXwY8kg2taWwxsJFoK0cAuupSZurcv1zTyYMqLyNuwvYYjs65Yz3g/cgh22QlUfOT3tOh+Jzk5MdJhy5+w=="
+      },
+      "Aspire.Hosting.AppHost": {
+        "type": "Direct",
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+          "Microsoft.Extensions.Options": "10.0.5",
+          "System.Diagnostics.EventLog": "10.0.5"
+        }
+      },
+      "Microsoft.Extensions.Logging.EventSource": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "vN+aq1hBFXyYvY5Ow9WyeR66drKQxRZmas4lAjh6QWfryPkjTn1uLtX5AFIxyDaZj78v5TG2sELUyvrXpAPQQw==",
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+          "Microsoft.Extensions.Logging": "10.0.5",
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+          "Microsoft.Extensions.Options": "10.0.5",
+          "Microsoft.Extensions.Primitives": "10.0.5"
+        }
+      },
+      "Microsoft.Extensions.Options": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
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+      "Microsoft.Extensions.Options.ConfigurationExtensions": {
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+          "Microsoft.Extensions.Options": "10.0.5",
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+      },
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+        "type": "Transitive",
+        "resolved": "17.6.3",
+        "contentHash": "N0ZIanl1QCgvUumEL1laasU0a7sOE5ZwLZVTn0pAePnfhq8P7SvTjF8Axq+CnavuQkmdQpGNXQ1efZtu5kDFbA=="
+      },
+      "Microsoft.VisualStudio.Threading.Only": {
+        "type": "Transitive",
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+        "contentHash": "vl5a2URJYCO5m+aZZtNlAXAMz28e2pUotRuoHD7RnCWOCeoyd8hWp5ZBaLNYq4iEj2oeJx5ZxiSboAjVmB20Qg==",
+        "dependencies": {
+          "Microsoft.VisualStudio.Validation": "17.8.8"
+        }
+      },
+      "Microsoft.VisualStudio.Validation": {
+        "type": "Transitive",
+        "resolved": "17.8.8",
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+      },
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+        "dependencies": {
+          "Microsoft.Extensions.Caching.Abstractions": "10.0.3",
+          "Microsoft.Extensions.Hosting.Abstractions": "10.0.3",
+          "ModelContextProtocol.Core": "1.0.0"
+        }
+      },
+      "ModelContextProtocol.Core": {
+        "type": "Transitive",
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+        "dependencies": {
+          "Microsoft.Extensions.AI.Abstractions": "10.3.0",
+          "Microsoft.Extensions.Logging.Abstractions": "10.0.3"
+        }
+      },
+      "Nerdbank.Streams": {
+        "type": "Transitive",
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+        "dependencies": {
+          "Microsoft.VisualStudio.Threading.Only": "17.13.61",
+          "Microsoft.VisualStudio.Validation": "17.8.8"
+        }
+      },
+      "Newtonsoft.Json": {
+        "type": "Transitive",
+        "resolved": "13.0.4",
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+      },
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+        "dependencies": {
+          "Microsoft.Extensions.Logging.Abstractions": "8.0.0"
+        }
+      },
+      "Polly.Core": {
+        "type": "Transitive",
+        "resolved": "8.6.5",
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+      },
+      "Semver": {
+        "type": "Transitive",
+        "resolved": "3.0.0",
+        "contentHash": "9jZCicsVgTebqkAujRWtC9J1A5EQVlu0TVKHcgoCuv345ve5DYf4D1MjhKEnQjdRZo6x/vdv6QQrYFs7ilGzLA==",
+        "dependencies": {
+          "Microsoft.Extensions.Primitives": "5.0.1"
+        }
+      },
+      "StreamJsonRpc": {
+        "type": "Transitive",
+        "resolved": "2.22.23",
+        "contentHash": "Ahq6uUFPnU9alny5h4agyX74th3PRq3NQCRNaDOqWcx20WT06mH/wENSk5IbHDc8BmfreQVEIBx5IXLBbsLFIA==",
+        "dependencies": {
+          "MessagePack": "2.5.192",
+          "Microsoft.VisualStudio.Threading.Only": "17.13.61",
+          "Microsoft.VisualStudio.Validation": "17.8.8",
+          "Nerdbank.Streams": "2.12.87",
+          "Newtonsoft.Json": "13.0.3"
+        }
+      },
+      "System.Diagnostics.EventLog": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "wugvy+pBVzjQEnRs9wMTWwoaeNFX3hsaHeVHFDIvJSWXp7wfmNWu3mxAwBIE6pyW+g6+rHa1Of5fTzb0QVqUTA=="
+      },
+      "System.IO.Hashing": {
+        "type": "Transitive",
+        "resolved": "10.0.3",
+        "contentHash": "La6ICwsdTKhVX+LKN+pvFjQRR3LhLwq3uKdi2knjLzRyPYBSydF4cjXidYxIiTcDD6XVYdsBWQEI8ZxiZ/OdIg=="
+      },
+      "YamlDotNet": {
+        "type": "Transitive",
+        "resolved": "16.3.0",
+        "contentHash": "SgMOdxbz8X65z8hraIs6hOEdnkH6hESTAIUa7viEngHOYaH+6q5XJmwr1+yb9vJpNQ19hCQY69xbFsLtXpobQA=="
+      }
+    }
+  }
+}

src/GmRelay.Bot/Dockerfile

@@ -30,8 +30,16 @@ RUN dotnet publish "GmRelay.Bot.csproj" -c Release -a $TARGETARCH -o /app/publis
 FROM mcr.microsoft.com/dotnet/runtime-deps:10.0-noble AS final
 WORKDIR /app
 
+# Устанавливаем wget для healthcheck
+RUN apt-get update && apt-get install -y --no-install-recommends wget \
+    && rm -rf /var/lib/apt/lists/*
+
 # Копируем только AOT-результаты из билда
 COPY --from=build /app/publish .
 
+EXPOSE 8081
+
+USER $APP_UID
+
 # Запуск скомпилированного AOT бинарного файла напрямую
 ENTRYPOINT ["./GmRelay.Bot"]

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

@@ -21,7 +21,8 @@ internal sealed record SessionContext(
     DateTime ScheduledAt,
     string Status,
     long GmTelegramId,
-    long TelegramChatId);
+    long TelegramChatId,
+    int? ThreadId);
 
 internal sealed record ParticipantRsvp(
     long TelegramId,
@@ -95,7 +96,8 @@ public sealed class HandleRsvpHandler(
                    s.scheduled_at AS ScheduledAt,
                    s.status AS Status,
                    g.gm_telegram_id AS GmTelegramId,
-                   g.telegram_chat_id AS TelegramChatId
+                   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
@@ -191,6 +193,7 @@ public sealed class HandleRsvpHandler(
                 {
                     await bot.SendMessage(
                         chatId: session.TelegramChatId,
+                        messageThreadId: session.ThreadId,
                         text: $"🎉 Игра «{session.Title}» подтверждена! Все участники на месте.",
                         cancellationToken: ct);
                 }

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

@@ -0,0 +1,6 @@
+namespace GmRelay.Bot.Features.Confirmation.SendConfirmation;
+
+public interface ISendConfirmationHandler
+{
+    Task HandleAsync(Guid sessionId, CancellationToken ct);
+}

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

@@ -15,6 +15,7 @@ internal sealed record SessionInfo(
     DateTime ScheduledAt,
     Guid GroupId,
     long TelegramChatId,
+    int? ThreadId,
     string NotificationMode);
 
 internal sealed record ParticipantInfo(
@@ -32,7 +33,7 @@ public sealed class SendConfirmationHandler(
     NpgsqlDataSource dataSource,
     ITelegramBotClient bot,
     DirectSessionNotificationSender directSender,
-    ILogger<SendConfirmationHandler> logger)
+    ILogger<SendConfirmationHandler> logger) : ISendConfirmationHandler
 {
     public async Task HandleAsync(Guid sessionId, CancellationToken ct)
     {
@@ -43,6 +44,7 @@ public sealed class SendConfirmationHandler(
             """
             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
@@ -99,18 +101,21 @@ public sealed class SendConfirmationHandler(
         // 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 and store message ID
+        // 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
             {

src/GmRelay.Bot/Features/Notifications/DirectSessionNotificationSender.cs

@@ -1,12 +1,12 @@
-using Telegram.Bot;
+using GmRelay.Bot.Infrastructure.Telegram;
-using Telegram.Bot.Types.Enums;
+using GmRelay.Shared.Platform;
 
 namespace GmRelay.Bot.Features.Notifications;
 
 public sealed record DirectNotificationRecipient(long TelegramId, string DisplayName);
 
 public sealed class DirectSessionNotificationSender(
-    ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     ILogger<DirectSessionNotificationSender> logger)
 {
     public async Task SendAsync(
@@ -20,11 +20,11 @@ public sealed class DirectSessionNotificationSender(
         {
             try
             {
-                await bot.SendMessage(
+                await messenger.SendPrivateMessageAsync(
-                    chatId: recipient.TelegramId,
+                    new PlatformPrivateMessage(
-                    text: htmlText,
+                        TelegramPlatformIds.User(recipient.TelegramId, recipient.DisplayName),
-                    parseMode: ParseMode.Html,
+                        htmlText),
-                    cancellationToken: ct);
+                    ct);
             }
             catch (Exception ex)
             {

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

@@ -0,0 +1,6 @@
+namespace GmRelay.Bot.Features.Reminders.SendJoinLink;
+
+public interface ISendJoinLinkHandler
+{
+    Task HandleAsync(Guid sessionId, CancellationToken ct);
+}

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

@@ -14,6 +14,7 @@ internal sealed record JoinLinkSession(
     string JoinLink,
     DateTime ScheduledAt,
     long TelegramChatId,
+    int? ThreadId,
     string NotificationMode);
 
 internal sealed record ConfirmedPlayer(
@@ -31,7 +32,7 @@ public sealed class SendJoinLinkHandler(
     NpgsqlDataSource dataSource,
     ITelegramBotClient bot,
     DirectSessionNotificationSender directSender,
-    ILogger<SendJoinLinkHandler> logger)
+    ILogger<SendJoinLinkHandler> logger) : ISendJoinLinkHandler
 {
     public async Task HandleAsync(Guid sessionId, CancellationToken ct)
     {
@@ -42,6 +43,7 @@ public sealed class SendJoinLinkHandler(
             """
             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
@@ -94,6 +96,7 @@ public sealed class SendJoinLinkHandler(
         // 4. Send
         var message = await bot.SendMessage(
             chatId: session.TelegramChatId,
+            messageThreadId: session.ThreadId,
             text: text,
             cancellationToken: ct);
 

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

@@ -0,0 +1,6 @@
+namespace GmRelay.Bot.Features.Reminders.SendOneHourReminder;
+
+public interface ISendOneHourReminderHandler
+{
+    Task HandleAsync(Guid sessionId, CancellationToken ct);
+}

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

@@ -15,7 +15,7 @@ internal sealed record OneHourReminderSession(
 public sealed class SendOneHourReminderHandler(
     NpgsqlDataSource dataSource,
     DirectSessionNotificationSender directSender,
-    ILogger<SendOneHourReminderHandler> logger)
+    ILogger<SendOneHourReminderHandler> logger) : ISendOneHourReminderHandler
 {
     public async Task HandleAsync(Guid sessionId, CancellationToken ct)
     {

src/GmRelay.Bot/Features/Sessions/CreateSession/CancelSessionHandler.cs

@@ -1,10 +1,9 @@
 using Dapper;
 using GmRelay.Bot.Features.Notifications;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
 using Npgsql;
-using Telegram.Bot;
-using Telegram.Bot.Types;
 using GmRelay.Bot.Infrastructure.Telegram;
 
 namespace GmRelay.Bot.Features.Sessions.CreateSession;
@@ -14,6 +13,7 @@ public sealed record CancelSessionCommand(
     long TelegramUserId,
     string CallbackQueryId,
     long ChatId,
+    int? MessageThreadId,
     int MessageId);
 
 // DTOs for AOT compilation
@@ -21,7 +21,7 @@ internal sealed record CancelSessionInfoDto(string Title, Guid BatchId, int? Bat
 
 public sealed class CancelSessionHandler(
     NpgsqlDataSource dataSource,
-    ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     DirectSessionNotificationSender directSender,
     ILogger<CancelSessionHandler> logger)
 {
@@ -29,7 +29,7 @@ public sealed class CancelSessionHandler(
     {
         await using var connection = await dataSource.OpenConnectionAsync(ct);
         await using var transaction = await connection.BeginTransactionAsync(ct);
-        
+
         // 1. Проверяем, что запрос делает управляющий данной группы.
         var session = await connection.QuerySingleOrDefaultAsync<CancelSessionInfoDto>(
             """
@@ -51,13 +51,13 @@ public sealed class CancelSessionHandler(
 
         if (session == null)
         {
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, "Сессия не найдена.", cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, "Сессия не найдена.", ct);
             return;
         }
 
         if (!session.CanManage)
         {
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, "Только owner или co-GM может отменять сессию.", showAlert: true, cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, "Только owner или co-GM может отменять сессию.", ct, showAlert: true);
             return;
         }
 
@@ -69,7 +69,7 @@ public sealed class CancelSessionHandler(
 
         // 3. Загружаем весь батч для перерисовки
         var batchSessions = await connection.QueryAsync<SessionBatchDto>(
-            @"SELECT id as SessionId, scheduled_at as ScheduledAt, status as Status, max_players as MaxPlayers
+            @"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",
@@ -104,22 +104,24 @@ public sealed class CancelSessionHandler(
 
         // 4. Перерисовываем сообщение
         var view = SessionBatchViewBuilder.Build(session.Title, batchSessions.ToList(), batchParticipants.ToList());
-        var renderResult = TelegramSessionBatchRenderer.Render(view);
 
         try
         {
-            await BatchMessageEditor.EditBatchMessageAsync(
+            var messageId = session.BatchMessageId ?? command.MessageId;
-                bot,
+            await messenger.UpdateScheduleAsync(
-                chatId: command.ChatId,
+                new PlatformScheduleMessage(
-                messageId: session.BatchMessageId ?? command.MessageId,
+                    TelegramPlatformIds.Group(command.ChatId, command.MessageThreadId),
-                text: renderResult.Text,
+                    view,
-                replyMarkup: renderResult.Markup,
+                    TelegramPlatformIds.Message(command.ChatId, command.MessageThreadId, messageId)),
                 ct);
 
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, "Сессия отменена!", cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, "Сессия отменена!", ct);
-            
+
             // Опционально: написать отдельное сообщение в чат
-            await bot.SendMessage(command.ChatId, $"❌ <b>Внимание!</b> Сессия \"{System.Net.WebUtility.HtmlEncode(session.Title)}\" отменена.", parseMode: Telegram.Bot.Types.Enums.ParseMode.Html, cancellationToken: ct);
+            await messenger.SendGroupMessageAsync(
+                TelegramPlatformIds.Group(command.ChatId, command.MessageThreadId),
+                $"❌ <b>Внимание!</b> Сессия \"{System.Net.WebUtility.HtmlEncode(session.Title)}\" отменена.",
+                ct);
 
             var mode = SessionNotificationModeExtensions.FromDatabaseValue(session.NotificationMode);
             if (mode.ShouldSendDirectMessages())
@@ -135,7 +137,10 @@ public sealed class CancelSessionHandler(
         catch (Exception ex)
         {
             logger.LogError(ex, "Failed to update batch message after cancelling session {SessionId}", command.SessionId);
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, "Ошибка при обновлении сообщения.", cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, "Ошибка при обновлении сообщения.", ct);
         }
     }
+
+    private Task AnswerAsync(string callbackQueryId, string text, CancellationToken ct, bool showAlert = false) =>
+        messenger.AnswerInteractionAsync(new PlatformInteractionReply(callbackQueryId, text, showAlert), ct);
 }

src/GmRelay.Bot/Features/Sessions/CreateSession/CreateSessionHandler.cs

@@ -77,11 +77,14 @@ public sealed class CreateSessionHandler(
         {
             await connection.ExecuteAsync(
                 """
-                INSERT INTO players (telegram_id, display_name, telegram_username)
+                INSERT INTO players (telegram_id, display_name, telegram_username, platform, external_user_id, external_username)
-                VALUES (@TgId, @Name, @Username)
+                VALUES (@TgId, @Name, @Username, 'Telegram', @TgId::TEXT, @Username)
                 ON CONFLICT (telegram_id) DO UPDATE
                 SET display_name = EXCLUDED.display_name,
-                    telegram_username = EXCLUDED.telegram_username;
+                    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 { TgId = gmId, Name = gmName, Username = gmUsername },
                 transaction);
@@ -94,10 +97,10 @@ public sealed class CreateSessionHandler(
                            FROM group_managers gm
                            JOIN players p ON p.id = gm.player_id
                            WHERE gm.group_id = g.id
-                             AND p.telegram_id = @GmId
+                             AND COALESCE(p.external_user_id, p.telegram_id::TEXT) = @GmId::TEXT
                        ) AS CanManage
                 FROM game_groups g
-                WHERE g.telegram_chat_id = @ChatId
+                WHERE COALESCE(g.external_group_id, g.telegram_chat_id::TEXT) = @ChatId::TEXT
                 """,
                 new { ChatId = chatId, GmId = gmId },
                 transaction);
@@ -107,8 +110,8 @@ public sealed class CreateSessionHandler(
             {
                 groupId = await connection.ExecuteScalarAsync<Guid>(
                     """
-                    INSERT INTO game_groups (telegram_chat_id, name, gm_telegram_id)
+                    INSERT INTO game_groups (telegram_chat_id, name, gm_telegram_id, platform, external_group_id)
-                    VALUES (@ChatId, @ChatName, @GmId)
+                    VALUES (@ChatId, @ChatName, @GmId, 'Telegram', @ChatId::TEXT)
                     RETURNING id;
                     """,
                     new { ChatId = chatId, ChatName = chatTitle, GmId = gmId },
@@ -119,7 +122,7 @@ public sealed class CreateSessionHandler(
                     INSERT INTO group_managers (group_id, player_id, role)
                     SELECT @GroupId, p.id, @OwnerRole
                     FROM players p
-                    WHERE p.telegram_id = @GmId
+                    WHERE COALESCE(p.external_user_id, p.telegram_id::TEXT) = @GmId::TEXT
                     ON CONFLICT (group_id, player_id) DO NOTHING
                     """,
                     new { GroupId = groupId, GmId = gmId, OwnerRole = GroupManagerRoleExtensions.OwnerValue },
@@ -144,14 +147,31 @@ public sealed class CreateSessionHandler(
                     transaction);
             }
 
-            int? messageThreadId = null;
+            var topicDestination = TelegramTopicRouting.ResolveNewScheduleDestination(
-            if (message.Chat.IsForum)
+                message.Chat.IsForum,
+                message.MessageThreadId);
+            var messageThreadId = topicDestination.MessageThreadId;
+            var topicCreatedByBot = topicDestination.TopicCreatedByBot;
+            if (topicDestination.ShouldCreateForumTopic)
             {
-                var topic = await botClient.CreateForumTopic(
+                try
-                    chatId: chatId,
+                {
-                    name: $"🎲 Игры: {title}",
+                    var topic = await botClient.CreateForumTopic(
-                    cancellationToken: cancellationToken);
+                        chatId: chatId,
-                messageThreadId = topic.MessageThreadId;
+                        name: $"🎲 Игры: {title}",
+                        cancellationToken: cancellationToken);
+                    messageThreadId = topic.MessageThreadId;
+                }
+                catch (Telegram.Bot.Exceptions.ApiRequestException ex)
+                    when (TelegramTopicRouting.IsMissingForumTopicRightsError(ex.Message))
+                {
+                    await transaction.RollbackAsync(cancellationToken);
+                    await botClient.SendMessage(
+                        chatId,
+                        TelegramTopicRouting.MissingForumTopicRightsMessage,
+                        cancellationToken: cancellationToken);
+                    return;
+                }
             }
 
             var batchId = Guid.NewGuid();
@@ -161,8 +181,8 @@ public sealed class CreateSessionHandler(
             {
                 var sessionId = await connection.ExecuteScalarAsync<Guid>(
                     """
-                    INSERT INTO sessions (batch_id, group_id, title, join_link, scheduled_at, status, thread_id, max_players)
+                    INSERT INTO sessions (batch_id, group_id, title, join_link, scheduled_at, status, thread_id, topic_created_by_bot, max_players)
-                    VALUES (@BatchId, @GroupId, @Title, @Link, @ScheduledAt, @Status, @ThreadId, @MaxPlayers)
+                    VALUES (@BatchId, @GroupId, @Title, @Link, @ScheduledAt, @Status, @ThreadId, @TopicCreatedByBot, @MaxPlayers)
                     RETURNING id;
                     """,
                     new
@@ -173,12 +193,13 @@ public sealed class CreateSessionHandler(
                         Link = link,
                         ScheduledAt = scheduledAt,
                         ThreadId = messageThreadId,
+                        TopicCreatedByBot = topicCreatedByBot,
                         MaxPlayers = parseResult.MaxPlayers,
                         Status = SessionStatus.Planned
                     },
                     transaction);
 
-                sessions.Add(new SessionBatchDto(sessionId, scheduledAt.UtcDateTime, SessionStatus.Planned, parseResult.MaxPlayers));
+                sessions.Add(new SessionBatchDto(sessionId, scheduledAt.UtcDateTime, SessionStatus.Planned, parseResult.MaxPlayers, link));
             }
 
             await transaction.CommitAsync(cancellationToken);

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

@@ -1,8 +1,7 @@
 using Dapper;
 using Npgsql;
-using Telegram.Bot;
-using Telegram.Bot.Types;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
 using GmRelay.Bot.Infrastructure.Telegram;
 
@@ -22,7 +21,7 @@ internal sealed record JoinSessionBatchDto(Guid BatchId, string Title, int? MaxP
 
 public sealed class JoinSessionHandler(
     NpgsqlDataSource dataSource,
-    ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     ILogger<JoinSessionHandler> logger)
 {
     public async Task HandleAsync(JoinSessionCommand command, CancellationToken ct)
@@ -35,9 +34,14 @@ public sealed class JoinSessionHandler(
         {
             // 1. Убеждаемся, что игрок есть в базе
             var playerId = await connection.ExecuteScalarAsync<Guid>(
-                @"INSERT INTO players (telegram_id, display_name, telegram_username) 
+                @"INSERT INTO players (telegram_id, display_name, telegram_username, platform, external_user_id, external_username)
-                  VALUES (@TgId, @Name, @Username)
+                  VALUES (@TgId, @Name, @Username, 'Telegram', @TgId::TEXT, @Username)
-                  ON CONFLICT (telegram_id) DO UPDATE SET display_name = EXCLUDED.display_name, telegram_username = EXCLUDED.telegram_username
+                  ON CONFLICT (telegram_id) DO UPDATE
+                  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)
                   RETURNING id;",
                 new { TgId = command.TelegramUserId, Name = command.DisplayName, Username = command.TelegramUsername },
                 transaction);
@@ -54,7 +58,7 @@ public sealed class JoinSessionHandler(
             if (batchInfo is null)
             {
                 await transaction.RollbackAsync(ct);
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, "Сессия не найдена.", cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, "Сессия не найдена.", ct);
                 return;
             }
 
@@ -75,7 +79,7 @@ public sealed class JoinSessionHandler(
                 var alreadyText = existingRegistrationStatus == ParticipantRegistrationStatus.Waitlisted
                     ? "Вы уже в листе ожидания!"
                     : "Вы уже записаны!";
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, alreadyText, cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, alreadyText, ct);
                 return;
             }
 
@@ -109,13 +113,13 @@ public sealed class JoinSessionHandler(
             if (inserted == 0)
             {
                 await transaction.RollbackAsync(ct);
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, "Вы уже записаны!", cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, "Вы уже записаны!", ct);
                 return;
             }
 
             // Загружаем весь батч для перерисовки
             var batchSessions = await connection.QueryAsync<SessionBatchDto>(
-                @"SELECT id as SessionId, scheduled_at as ScheduledAt, status as Status, max_players as MaxPlayers
+                @"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",
@@ -138,20 +142,17 @@ public sealed class JoinSessionHandler(
 
             // 4. Перерисовываем сообщение
             var view = SessionBatchViewBuilder.Build(batchInfo.Title, batchSessions.ToList(), batchParticipants.ToList());
-            var renderResult = TelegramSessionBatchRenderer.Render(view);
+            await messenger.UpdateScheduleAsync(
-
+                new PlatformScheduleMessage(
-            await BatchMessageEditor.EditBatchMessageAsync(
+                    TelegramPlatformIds.Group(command.ChatId),
-                bot,
+                    view,
-                chatId: command.ChatId,
+                    TelegramPlatformIds.Message(command.ChatId, threadId: null, command.MessageId)),
-                messageId: command.MessageId,
-                text: renderResult.Text,
-                replyMarkup: renderResult.Markup,
                 ct);
 
             var callbackText = registrationStatus == ParticipantRegistrationStatus.Waitlisted
                 ? "Основной состав заполнен. Вы добавлены в лист ожидания."
                 : "Вы успешно записаны!";
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, callbackText, cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, callbackText, ct);
         }
         catch (Exception ex)
         {
@@ -164,7 +165,10 @@ public sealed class JoinSessionHandler(
             var errorText = transactionCommitted
                 ? "Регистрация сохранена, но не удалось обновить сообщение расписания."
                 : "Произошла ошибка при регистрации.";
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, errorText, cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, errorText, ct);
         }
     }
+
+    private Task AnswerAsync(string callbackQueryId, string text, CancellationToken ct) =>
+        messenger.AnswerInteractionAsync(new PlatformInteractionReply(callbackQueryId, text), ct);
 }

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

@@ -1,8 +1,8 @@
 using Dapper;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
 using Npgsql;
-using Telegram.Bot;
 using GmRelay.Bot.Infrastructure.Telegram;
 
 namespace GmRelay.Bot.Features.Sessions.CreateSession;
@@ -20,7 +20,7 @@ internal sealed record LeaveSessionPromotionDto(Guid ParticipantRowId, string Di
 
 public sealed class LeaveSessionHandler(
     NpgsqlDataSource dataSource,
-    ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     ILogger<LeaveSessionHandler> logger)
 {
     public async Task HandleAsync(LeaveSessionCommand command, CancellationToken ct)
@@ -47,14 +47,14 @@ public sealed class LeaveSessionHandler(
             if (session is null)
             {
                 await transaction.RollbackAsync(ct);
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, "Сессия не найдена.", cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, "Сессия не найдена.", ct);
                 return;
             }
 
             if (SessionStatus.IsCancelled(session.Status))
             {
                 await transaction.RollbackAsync(ct);
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, "Сессия уже отменена.", cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, "Сессия уже отменена.", ct);
                 return;
             }
 
@@ -76,7 +76,7 @@ public sealed class LeaveSessionHandler(
             if (participant is null)
             {
                 await transaction.RollbackAsync(ct);
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, "Вы не записаны на эту сессию.", cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, "Вы не записаны на эту сессию.", ct);
                 return;
             }
 
@@ -157,7 +157,8 @@ public sealed class LeaveSessionHandler(
                 SELECT id AS SessionId,
                        scheduled_at AS ScheduledAt,
                        status AS Status,
-                       max_players AS MaxPlayers
+                       max_players AS MaxPlayers,
+                       join_link AS JoinLink
                 FROM sessions
                 WHERE batch_id = @BatchId
                 ORDER BY scheduled_at
@@ -184,14 +185,11 @@ public sealed class LeaveSessionHandler(
             transactionCommitted = true;
 
             var view = SessionBatchViewBuilder.Build(session.Title, batchSessions, batchParticipants);
-            var renderResult = TelegramSessionBatchRenderer.Render(view);
+            await messenger.UpdateScheduleAsync(
-
+                new PlatformScheduleMessage(
-            await BatchMessageEditor.EditBatchMessageAsync(
+                    TelegramPlatformIds.Group(command.ChatId),
-                bot,
+                    view,
-                chatId: command.ChatId,
+                    TelegramPlatformIds.Message(command.ChatId, threadId: null, command.MessageId)),
-                messageId: command.MessageId,
-                text: renderResult.Text,
-                replyMarkup: renderResult.Markup,
                 ct);
 
             var callbackText = participant.RegistrationStatus == ParticipantRegistrationStatus.Waitlisted
@@ -200,7 +198,7 @@ public sealed class LeaveSessionHandler(
                     ? "Вы отписались от сессии."
                     : $"Вы отписались от сессии. Место получил(а) {promotedDisplayName}.";
 
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, callbackText, cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, callbackText, ct);
         }
         catch (Exception ex)
         {
@@ -213,7 +211,10 @@ public sealed class LeaveSessionHandler(
             var errorText = transactionCommitted
                 ? "Запись снята, но не удалось обновить сообщение расписания."
                 : "Произошла ошибка при отмене записи.";
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, errorText, cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, errorText, ct);
         }
     }
+
+    private Task AnswerAsync(string callbackQueryId, string text, CancellationToken ct) =>
+        messenger.AnswerInteractionAsync(new PlatformInteractionReply(callbackQueryId, text), ct);
 }

src/GmRelay.Bot/Features/Sessions/CreateSession/PromoteWaitlistedPlayerHandler.cs

@@ -1,8 +1,8 @@
 using Dapper;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
 using Npgsql;
-using Telegram.Bot;
 using GmRelay.Bot.Infrastructure.Telegram;
 
 namespace GmRelay.Bot.Features.Sessions.CreateSession;
@@ -19,7 +19,7 @@ internal sealed record WaitlistedParticipantDto(Guid ParticipantRowId, string Di
 
 public sealed class PromoteWaitlistedPlayerHandler(
     NpgsqlDataSource dataSource,
-    ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     ILogger<PromoteWaitlistedPlayerHandler> logger)
 {
     public async Task HandleAsync(PromoteWaitlistedPlayerCommand command, CancellationToken ct)
@@ -53,14 +53,14 @@ public sealed class PromoteWaitlistedPlayerHandler(
             if (session is null)
             {
                 await transaction.RollbackAsync(ct);
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, "Сессия не найдена.", cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, "Сессия не найдена.", ct);
                 return;
             }
 
             if (!session.CanManage)
             {
                 await transaction.RollbackAsync(ct);
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, "Только owner или co-GM может поднимать игроков из листа ожидания.", showAlert: true, cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, "Только owner или co-GM может поднимать игроков из листа ожидания.", ct, showAlert: true);
                 return;
             }
 
@@ -89,14 +89,14 @@ public sealed class PromoteWaitlistedPlayerHandler(
             if (waitlistedParticipants == 0)
             {
                 await transaction.RollbackAsync(ct);
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, "Лист ожидания пуст.", cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, "Лист ожидания пуст.", ct);
                 return;
             }
 
             if (!SessionCapacityRules.CanPromoteWaitlistedPlayer(session.MaxPlayers, activeParticipants, waitlistedParticipants))
             {
                 await transaction.RollbackAsync(ct);
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, "Нет свободных мест. Увеличьте лимит перед повышением игрока.", showAlert: true, cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, "Нет свободных мест. Увеличьте лимит перед повышением игрока.", ct, showAlert: true);
                 return;
             }
 
@@ -137,7 +137,8 @@ public sealed class PromoteWaitlistedPlayerHandler(
                 SELECT id AS SessionId,
                        scheduled_at AS ScheduledAt,
                        status AS Status,
-                       max_players AS MaxPlayers
+                       max_players AS MaxPlayers,
+                       join_link AS JoinLink
                 FROM sessions
                 WHERE batch_id = @BatchId
                 ORDER BY scheduled_at
@@ -164,17 +165,15 @@ public sealed class PromoteWaitlistedPlayerHandler(
             transactionCommitted = true;
 
             var view = SessionBatchViewBuilder.Build(session.Title, batchSessions, batchParticipants);
-            var renderResult = TelegramSessionBatchRenderer.Render(view);
+            var messageId = session.BatchMessageId ?? command.MessageId;
-
+            await messenger.UpdateScheduleAsync(
-            await BatchMessageEditor.EditBatchMessageAsync(
+                new PlatformScheduleMessage(
-                bot,
+                    TelegramPlatformIds.Group(command.ChatId),
-                chatId: command.ChatId,
+                    view,
-                messageId: session.BatchMessageId ?? command.MessageId,
+                    TelegramPlatformIds.Message(command.ChatId, threadId: null, messageId)),
-                text: renderResult.Text,
-                replyMarkup: renderResult.Markup,
                 ct);
 
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, $"{promoted.DisplayName} переведен(а) в основной состав.", cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, $"{promoted.DisplayName} переведен(а) в основной состав.", ct);
         }
         catch (Exception ex)
         {
@@ -187,7 +186,10 @@ public sealed class PromoteWaitlistedPlayerHandler(
             var errorText = transactionCommitted
                 ? "Игрок повышен, но не удалось обновить сообщение расписания."
                 : "Ошибка при обновлении листа ожидания.";
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, errorText, cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, errorText, ct);
         }
     }
+
+    private Task AnswerAsync(string callbackQueryId, string text, CancellationToken ct, bool showAlert = false) =>
+        messenger.AnswerInteractionAsync(new PlatformInteractionReply(callbackQueryId, text, showAlert), ct);
 }

src/GmRelay.Bot/Features/Sessions/ExportCalendar/ExportCalendarHandler.cs

@@ -1,8 +1,10 @@
 using System.Text;
 using Dapper;
+using GmRelay.Bot.Infrastructure.Telegram;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
+using Microsoft.Extensions.Configuration;
 using Npgsql;
-using Telegram.Bot;
 using Telegram.Bot.Types;
 
 namespace GmRelay.Bot.Features.Sessions.ExportCalendar;
@@ -11,30 +13,31 @@ internal sealed record CalendarSessionDto(Guid Id, string Title, DateTime Schedu
 
 public sealed class ExportCalendarHandler(
     NpgsqlDataSource dataSource,
-    ITelegramBotClient botClient)
+    IPlatformMessenger messenger,
+    IConfiguration configuration)
 {
     public async Task HandleAsync(Message message, CancellationToken cancellationToken)
     {
         await using var connection = await dataSource.OpenConnectionAsync(cancellationToken);
 
         var sessions = await connection.QueryAsync<CalendarSessionDto>(
-            @"SELECT s.id as Id, s.title as Title, s.scheduled_at as ScheduledAt
+            @"SELECT s.id as Id, s.title as Title, s.scheduled_at as ScheduledAt"
-              FROM sessions s
+            + " FROM sessions s"
-              JOIN game_groups g ON s.group_id = g.id
+            + " JOIN game_groups g ON s.group_id = g.id"
-              WHERE g.telegram_chat_id = @ChatId 
+            + " WHERE g.telegram_chat_id = @ChatId"
-                AND s.status = @Planned
+            + " AND s.status = @Planned"
-                AND s.scheduled_at > NOW()
+            + " AND s.scheduled_at > NOW()"
-              ORDER BY s.scheduled_at ASC",
+            + " ORDER BY s.scheduled_at ASC",
             new { ChatId = message.Chat.Id, Planned = SessionStatus.Planned });
 
         var sessionsList = sessions.ToList();
 
         if (sessionsList.Count == 0)
         {
-            await botClient.SendMessage(
+            await messenger.SendGroupMessageAsync(
-                chatId: message.Chat.Id,
+                TelegramPlatformIds.Group(message.Chat.Id, message.MessageThreadId),
-                text: "📭 У этой группы нет запланированных сессий для экспорта.",
+                "📭 У этой группы нет запланированных сессий для экспорта.",
-                cancellationToken: cancellationToken);
+                cancellationToken);
             return;
         }
 
@@ -54,24 +57,57 @@ public sealed class ExportCalendarHandler(
             sb.AppendLine($"DTSTART:{dtStart}");
             sb.AppendLine($"DTEND:{dtEnd}");
             sb.AppendLine($"SUMMARY:{s.Title}");
-            // Escape special chars according to iCal standards (RFC 5545) -- simple escaping for summary
-            // In a fuller implementation we'd escape \r\n, commas, etc. But titles are mostly plain text.
             sb.AppendLine("END:VEVENT");
         }
 
         sb.AppendLine("END:VCALENDAR");
 
         var bytes = Encoding.UTF8.GetBytes(sb.ToString());
-        using var stream = new MemoryStream(bytes);
 
-        var inputFile = InputFile.FromStream(stream, "schedule.ics");
 
-        await botClient.SendDocument(
+        // Create calendar subscription
-             chatId: message.Chat.Id,
+        string? subscriptionUrl = null;
-             document: inputFile,
+        var baseUrl = configuration["Web:BaseUrl"];
-             caption: "📅 <b>Ваш календарь игр!</b>\nОткройте файл на устройстве, чтобы добавить события в свой календарь.",
+        var senderId = message.From?.Id;
-             parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
+        if (!string.IsNullOrWhiteSpace(baseUrl) && senderId.HasValue)
-             messageThreadId: message.MessageThreadId,
+        {
-             cancellationToken: cancellationToken);
+            try
+            {
+                var token = Guid.NewGuid().ToString("N");
+                var groupId = await connection.QueryFirstOrDefaultAsync<Guid?>(
+                    @"SELECT id FROM game_groups WHERE telegram_chat_id = @ChatId",
+                    new { ChatId = message.Chat.Id });
+
+                await connection.ExecuteAsync(
+                    @"INSERT INTO calendar_subscriptions (id, token, user_telegram_id, group_id, filter_type, created_at, expires_at)
+                      VALUES (gen_random_uuid(), @token, @userTelegramId, @groupId, @filterType, now(), NULL)",
+                    new { token, userTelegramId = senderId.Value, groupId, filterType = (int)CalendarSubscriptionFilter.SpecificGroup });
+
+                subscriptionUrl = $"{baseUrl.TrimEnd('/')}/calendar/{token}.ics";
+            }
+            catch
+            {
+                // Non-critical: if subscription creation fails, still send the file
+            }
+        }
+
+        var actions = subscriptionUrl is not null
+            ? new[]
+            {
+                new PlatformMessageAction(
+                    "calendar-subscription",
+                    "🔗 Подписаться на календарь",
+                    subscriptionUrl)
+            }
+            : Array.Empty<PlatformMessageAction>();
+
+        await messenger.SendCalendarFileAsync(
+            new PlatformCalendarFile(
+                TelegramPlatformIds.Group(message.Chat.Id, message.MessageThreadId),
+                "schedule.ics",
+                bytes,
+                "📅 <b>Ваш календарь игр!</b>\nОткройте файл на устройстве, чтобы добавить события в свой календарь.",
+                actions),
+            cancellationToken);
     }
 }

src/GmRelay.Bot/Features/Sessions/ListSessions/DeleteSessionHandler.cs

@@ -1,6 +1,7 @@
 using Dapper;
 using Npgsql;
 using Telegram.Bot;
+using GmRelay.Bot.Infrastructure.Telegram;
 using GmRelay.Shared.Domain;
 
 namespace GmRelay.Bot.Features.Sessions.ListSessions;
@@ -12,7 +13,13 @@ public sealed record DeleteSessionCommand(
     long ChatId,
     int MessageId);
 
-internal sealed record DeleteSessionInfoDto(string Title, Guid BatchId, bool CanManage, int? ThreadId);
+internal sealed record DeleteSessionInfoDto(
+    string Title,
+    Guid BatchId,
+    Guid GroupId,
+    bool CanManage,
+    int? ThreadId,
+    bool TopicCreatedByBot);
 
 public sealed class DeleteSessionHandler(
     NpgsqlDataSource dataSource,
@@ -29,7 +36,9 @@ public sealed class DeleteSessionHandler(
             """
             SELECT s.title AS Title,
                    s.batch_id AS BatchId,
+                   s.group_id AS GroupId,
                    s.thread_id AS ThreadId,
+                   s.topic_created_by_bot AS TopicCreatedByBot,
                    EXISTS (
                        SELECT 1
                        FROM group_managers gm
@@ -57,15 +66,23 @@ public sealed class DeleteSessionHandler(
         // 2. Delete session
         await connection.ExecuteAsync("DELETE FROM sessions WHERE id = @Id", new { Id = command.SessionId }, transaction);
 
-        // 3. Check if any sessions are left in the batch
+        var remainingInTopic = session.ThreadId.HasValue
-        var remainingInBatch = await connection.ExecuteScalarAsync<int>(
+            ? await connection.ExecuteScalarAsync<int>(
-            "SELECT COUNT(*) FROM sessions WHERE batch_id = @BatchId",
+                """
-            new { BatchId = session.BatchId }, transaction);
+                SELECT COUNT(*)
+                FROM sessions
+                WHERE group_id = @GroupId
+                  AND thread_id = @ThreadId
+                """,
+                new { session.GroupId, ThreadId = session.ThreadId.Value },
+                transaction)
+            : 0;
 
         await transaction.CommitAsync(ct);
 
-        // 4. If no sessions left and we have a forum topic, delete the topic
+        // 4. If no sessions are left in a bot-owned forum topic, delete the topic.
-        if (remainingInBatch == 0 && session.ThreadId.HasValue)
+        if (session.ThreadId.HasValue &&
+            TelegramTopicRouting.ShouldDeleteForumTopic(session.TopicCreatedByBot, remainingInTopic))
         {
             try
             {
@@ -113,7 +130,7 @@ public sealed class DeleteSessionHandler(
 
         if (sessionsList.Count == 0)
         {
-            try { await bot.EditMessageText(command.ChatId, command.MessageId, "📭 В этой группе нет предстоящих игр.", cancellationToken: ct); } catch {}
+            try { await bot.EditMessageText(command.ChatId, command.MessageId, "📭 В этой группе нет предстоящих игр.", cancellationToken: ct); } catch { }
             return;
         }
 

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.Platform;
 using GmRelay.Shared.Rendering;
 using Npgsql;
 using Telegram.Bot;
@@ -14,7 +15,7 @@ namespace GmRelay.Bot.Features.Sessions.RescheduleSession;
 
 internal sealed record AwaitingProposalDto(
     Guid Id, Guid SessionId, string Title, DateTime CurrentScheduledAt,
-    Guid BatchId, int? BatchMessageId, long TelegramChatId, string NotificationMode);
+    Guid BatchId, int? BatchMessageId, long TelegramChatId, int? ThreadId, string NotificationMode);
 
 internal sealed record VoteParticipantDto(
     Guid PlayerId,
@@ -33,6 +34,7 @@ internal sealed record VoteParticipantDto(
 public sealed class HandleRescheduleTimeInputHandler(
     NpgsqlDataSource dataSource,
     ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     DirectSessionNotificationSender directSender,
     ILogger<HandleRescheduleTimeInputHandler> logger)
 {
@@ -57,6 +59,7 @@ public sealed class HandleRescheduleTimeInputHandler(
             SELECT rp.id AS Id, rp.session_id AS SessionId, s.title AS Title, s.scheduled_at AS CurrentScheduledAt,
                    s.batch_id AS BatchId, s.batch_message_id AS BatchMessageId,
                    g.telegram_chat_id AS TelegramChatId,
+                   s.thread_id AS ThreadId,
                    s.notification_mode AS NotificationMode
             FROM reschedule_proposals rp
             JOIN sessions s ON s.id = rp.session_id
@@ -82,11 +85,10 @@ public sealed class HandleRescheduleTimeInputHandler(
         // 2. Parse voting input
         if (!RescheduleVotingInput.TryParse(text, DateTimeOffset.UtcNow, out var votingInput, out var parseError))
         {
-            await bot.SendMessage(
+            await messenger.SendGroupMessageAsync(
-                chatId: chatId,
+                TelegramPlatformIds.Group(chatId, proposal.ThreadId),
-                text: $"⚠️ {parseError}\n\nИспользуйте формат:\n<code>25.04.2026 19:30\n26.04.2026 18:00\nДедлайн: 25.04.2026 12:00</code>",
+                $"⚠️ {parseError}\n\nИспользуйте формат:\n<code>25.04.2026 19:30\n26.04.2026 18:00\nДедлайн: 25.04.2026 12:00</code>",
-                parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
+                ct);
-                cancellationToken: ct);
             return true;
         }
 
@@ -161,6 +163,7 @@ public sealed class HandleRescheduleTimeInputHandler(
 
         var voteMsg = await bot.SendMessage(
             chatId: chatId,
+            messageThreadId: proposal.ThreadId,
             text: voteText,
             parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
             replyMarkup: keyboard,
@@ -224,6 +227,8 @@ public sealed class HandleRescheduleTimeInputHandler(
             UPDATE sessions
             SET scheduled_at = @NewTime,
                 status = @Status,
+                confirmation_message_id = NULL,
+                confirmation_sent_at = NULL,
                 one_hour_reminder_processed_at = NULL,
                 updated_at = now()
             WHERE id = @SessionId
@@ -238,11 +243,10 @@ public sealed class HandleRescheduleTimeInputHandler(
 
         await transaction.CommitAsync(ct);
 
-        await bot.SendMessage(
+        await messenger.SendGroupMessageAsync(
-            chatId: chatId,
+            TelegramPlatformIds.Group(chatId, proposal.ThreadId),
-            text: $"✅ Сессия «{proposal.Title}» перенесена!\n\n📅 Новое время: <b>{newTime.ToOffset(TimeSpan.FromHours(3)).ToString("d MMMM yyyy, HH:mm", System.Globalization.CultureInfo.GetCultureInfo("ru-RU"))}</b> (МСК)\n\n<i>Участников нет — голосование не требуется.</i>",
+            $"✅ Сессия «{proposal.Title}» перенесена!\n\n📅 Новое время: <b>{newTime.ToOffset(TimeSpan.FromHours(3)).ToString("d MMMM yyyy, HH:mm", System.Globalization.CultureInfo.GetCultureInfo("ru-RU"))}</b> (МСК)\n\n<i>Участников нет — голосование не требуется.</i>",
-            parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
+            ct);
-            cancellationToken: ct);
 
         // Re-render batch message with updated time
         await TryUpdateBatchMessage(proposal, ct);
@@ -357,7 +361,7 @@ public sealed class HandleRescheduleTimeInputHandler(
             await using var conn = await dataSource.OpenConnectionAsync(ct);
 
             var batchSessions = (await conn.QueryAsync<SessionBatchDto>(
-                "SELECT id AS SessionId, scheduled_at AS ScheduledAt, status AS Status, max_players AS MaxPlayers FROM sessions WHERE batch_id = @BatchId ORDER BY scheduled_at",
+                "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();
 
             var batchParticipants = (await conn.QueryAsync<ParticipantBatchDto>(
@@ -377,14 +381,12 @@ public sealed class HandleRescheduleTimeInputHandler(
             if (proposal.BatchMessageId.HasValue)
             {
                 var view = SessionBatchViewBuilder.Build(proposal.Title, batchSessions, batchParticipants);
-                var renderResult = TelegramSessionBatchRenderer.Render(view);
 
-                await BatchMessageEditor.EditBatchMessageAsync(
+                await messenger.UpdateScheduleAsync(
-                    bot,
+                    new PlatformScheduleMessage(
-                    chatId: proposal.TelegramChatId,
+                        TelegramPlatformIds.Group(proposal.TelegramChatId, proposal.ThreadId),
-                    messageId: proposal.BatchMessageId.Value,
+                        view,
-                    text: renderResult.Text,
+                        TelegramPlatformIds.Message(proposal.TelegramChatId, proposal.ThreadId, proposal.BatchMessageId.Value)),
-                    replyMarkup: renderResult.Markup,
                     ct);
             }
             else

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

@@ -1,5 +1,6 @@
 using Dapper;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
 using Npgsql;
 using Telegram.Bot;
 
@@ -22,6 +23,7 @@ internal sealed record VoteProposalDto(
 public sealed class HandleRescheduleVoteHandler(
     NpgsqlDataSource dataSource,
     ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     ILogger<HandleRescheduleVoteHandler> logger)
 {
     public async Task HandleAsync(HandleRescheduleVoteCommand command, CancellationToken ct)
@@ -46,20 +48,13 @@ public sealed class HandleRescheduleVoteHandler(
 
         if (proposal is null)
         {
-            await bot.AnswerCallbackQuery(
+            await AnswerAsync(command.CallbackQueryId, "Голосование уже завершено или не найдено.", ct);
-                command.CallbackQueryId,
-                "Голосование уже завершено или не найдено.",
-                cancellationToken: ct);
             return;
         }
 
         if (proposal.VotingDeadlineAt <= DateTimeOffset.UtcNow)
         {
-            await bot.AnswerCallbackQuery(
+            await AnswerAsync(command.CallbackQueryId, "Дедлайн уже прошёл. Результаты скоро будут применены.", ct, showAlert: true);
-                command.CallbackQueryId,
-                "Дедлайн уже прошёл. Результаты скоро будут применены.",
-                showAlert: true,
-                cancellationToken: ct);
             return;
         }
 
@@ -78,10 +73,7 @@ public sealed class HandleRescheduleVoteHandler(
 
         if (playerId is null)
         {
-            await bot.AnswerCallbackQuery(
+            await AnswerAsync(command.CallbackQueryId, "Вы не являетесь участником этой сессии.", ct);
-                command.CallbackQueryId,
-                "Вы не являетесь участником этой сессии.",
-                cancellationToken: ct);
             return;
         }
 
@@ -169,9 +161,9 @@ public sealed class HandleRescheduleVoteHandler(
             logger.LogWarning(ex, "Failed to update reschedule vote message for proposal {ProposalId}", proposal.Id);
         }
 
-        await bot.AnswerCallbackQuery(
+        await AnswerAsync(command.CallbackQueryId, "Ваш голос учтён. До дедлайна его можно изменить.", ct);
-            command.CallbackQueryId,
-            "Ваш голос учтён. До дедлайна его можно изменить.",
-            cancellationToken: ct);
     }
+
+    private Task AnswerAsync(string callbackQueryId, string text, CancellationToken ct, bool showAlert = false) =>
+        messenger.AnswerInteractionAsync(new PlatformInteractionReply(callbackQueryId, text, showAlert), ct);
 }

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

@@ -1,7 +1,8 @@
 using Dapper;
+using GmRelay.Bot.Infrastructure.Telegram;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
 using Npgsql;
-using Telegram.Bot;
 
 namespace GmRelay.Bot.Features.Sessions.RescheduleSession;
 
@@ -12,6 +13,7 @@ public sealed record InitiateRescheduleCommand(
     long TelegramUserId,
     string CallbackQueryId,
     long ChatId,
+    int? MessageThreadId,
     int MessageId);
 
 // ── DTOs ─────────────────────────────────────────────────────────────
@@ -27,7 +29,7 @@ internal sealed record RescheduleSessionInfoDto(string Title, bool CanManage);
 /// </summary>
 public sealed class InitiateRescheduleHandler(
     NpgsqlDataSource dataSource,
-    ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     ILogger<InitiateRescheduleHandler> logger)
 {
     public async Task HandleAsync(InitiateRescheduleCommand command, CancellationToken ct)
@@ -52,14 +54,13 @@ public sealed class InitiateRescheduleHandler(
 
         if (session is null)
         {
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, "Сессия не найдена.", cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, "Сессия не найдена.", ct);
             return;
         }
 
         if (!session.CanManage)
         {
-            await bot.AnswerCallbackQuery(command.CallbackQueryId,
+            await AnswerAsync(command.CallbackQueryId, "Только owner или co-GM может переносить сессию.", ct, showAlert: true);
-                "Только owner или co-GM может переносить сессию.", showAlert: true, cancellationToken: ct);
             return;
         }
 
@@ -75,8 +76,7 @@ public sealed class InitiateRescheduleHandler(
 
         if (hasActive)
         {
-            await bot.AnswerCallbackQuery(command.CallbackQueryId,
+            await AnswerAsync(command.CallbackQueryId, "Уже есть активный запрос на перенос этой сессии.", ct, showAlert: true);
-                "Уже есть активный запрос на перенос этой сессии.", showAlert: true, cancellationToken: ct);
             return;
         }
 
@@ -91,22 +91,28 @@ public sealed class InitiateRescheduleHandler(
         logger.LogInformation("Reschedule initiated for session {SessionId} by GM {GmId}", command.SessionId, command.TelegramUserId);
 
         // 4. Prompt GM in chat
-        await bot.AnswerCallbackQuery(command.CallbackQueryId,
+        await AnswerAsync(command.CallbackQueryId, "Введите 2-3 варианта времени и дедлайн голосования.", ct);
-            "Введите 2-3 варианта времени и дедлайн голосования.", cancellationToken: ct);
 
-        await bot.SendMessage(
+        var prompt = string.Join(
-            chatId: command.ChatId,
+            "\n",
-            text: $"""
+            new[]
-                ⏰ Укажите 2-3 варианта времени для сессии «{session.Title}» и дедлайн голосования.
+            {
+                $"⏰ Укажите 2-3 варианта времени для сессии «{session.Title}» и дедлайн голосования.",
+                "",
+                "Формат:",
+                "<code>25.04.2026 19:30",
+                "26.04.2026 18:00",
+                "Дедлайн: 25.04.2026 12:00</code>",
+                "",
+                "Дедлайн должен быть в будущем и раньше первого предложенного времени."
+            });
 
-                Формат:
+        await messenger.SendGroupMessageAsync(
-                <code>25.04.2026 19:30
+            TelegramPlatformIds.Group(command.ChatId, command.MessageThreadId),
-                26.04.2026 18:00
+            prompt,
-                Дедлайн: 25.04.2026 12:00</code>
+            ct);
-
-                Дедлайн должен быть в будущем и раньше первого предложенного времени.
-                """,
-            parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
-            cancellationToken: ct);
     }
+
+    private Task AnswerAsync(string callbackQueryId, string text, CancellationToken ct, bool showAlert = false) =>
+        messenger.AnswerInteractionAsync(new PlatformInteractionReply(callbackQueryId, text, showAlert), ct);
 }

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

@@ -1,6 +1,8 @@
 using Dapper;
 using GmRelay.Bot.Features.Notifications;
+using GmRelay.Bot.Infrastructure.Scheduling;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
 using Npgsql;
 using Telegram.Bot;
@@ -19,12 +21,15 @@ internal sealed record DueRescheduleProposalDto(
     int? BatchMessageId,
     int? VoteMessageId,
     long TelegramChatId,
+    int? ThreadId,
     string NotificationMode);
 
 public sealed class RescheduleVotingDeadlineService(
     NpgsqlDataSource dataSource,
     ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     DirectSessionNotificationSender directSender,
+    ISystemClock clock,
     ILogger<RescheduleVotingDeadlineService> logger) : BackgroundService
 {
     protected override async Task ExecuteAsync(CancellationToken stoppingToken)
@@ -55,10 +60,11 @@ public sealed class RescheduleVotingDeadlineService(
                 FROM reschedule_proposals
                 WHERE status = 'Voting'
                   AND voting_deadline_at IS NOT NULL
-                  AND voting_deadline_at <= now()
+                  AND voting_deadline_at <= @Now
                 ORDER BY voting_deadline_at
                 LIMIT 25
-                """)).ToList();
+                """,
+                new { Now = clock.UtcNow.UtcDateTime })).ToList();
 
             foreach (var proposalId in proposalIds)
             {
@@ -90,6 +96,7 @@ public sealed class RescheduleVotingDeadlineService(
                    s.batch_id AS BatchId,
                    s.batch_message_id AS BatchMessageId,
                    s.notification_mode AS NotificationMode,
+                   s.thread_id AS ThreadId,
                    g.telegram_chat_id AS TelegramChatId
             FROM reschedule_proposals rp
             JOIN sessions s ON s.id = rp.session_id
@@ -97,10 +104,10 @@ public sealed class RescheduleVotingDeadlineService(
             WHERE rp.id = @ProposalId
               AND rp.status = 'Voting'
               AND rp.voting_deadline_at IS NOT NULL
-              AND rp.voting_deadline_at <= now()
+              AND rp.voting_deadline_at <= @Now
             FOR UPDATE
             """,
-            new { ProposalId = proposalId },
+            new { ProposalId = proposalId, Now = clock.UtcNow.UtcDateTime },
             transaction);
 
         if (proposal is null)
@@ -166,6 +173,7 @@ public sealed class RescheduleVotingDeadlineService(
                 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()
@@ -286,7 +294,7 @@ public sealed class RescheduleVotingDeadlineService(
             await using var connection = await dataSource.OpenConnectionAsync(ct);
 
             var batchSessions = (await connection.QueryAsync<SessionBatchDto>(
-                "SELECT id AS SessionId, scheduled_at AS ScheduledAt, status AS Status, max_players AS MaxPlayers FROM sessions WHERE batch_id = @BatchId ORDER BY scheduled_at",
+                "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();
 
             var batchParticipants = (await connection.QueryAsync<ParticipantBatchDto>(
@@ -306,23 +314,20 @@ public sealed class RescheduleVotingDeadlineService(
             if (proposal.BatchMessageId.HasValue)
             {
                 var view = SessionBatchViewBuilder.Build(proposal.Title, batchSessions, batchParticipants);
-                var renderResult = TelegramSessionBatchRenderer.Render(view);
 
-                await BatchMessageEditor.EditBatchMessageAsync(
+                await messenger.UpdateScheduleAsync(
-                    bot,
+                    new PlatformScheduleMessage(
-                    chatId: proposal.TelegramChatId,
+                        TelegramPlatformIds.Group(proposal.TelegramChatId, proposal.ThreadId),
-                    messageId: proposal.BatchMessageId.Value,
+                        view,
-                    text: renderResult.Text,
+                        TelegramPlatformIds.Message(proposal.TelegramChatId, proposal.ThreadId, proposal.BatchMessageId.Value)),
-                    replyMarkup: renderResult.Markup,
                     ct);
             }
             else
             {
-                await bot.SendMessage(
+                await messenger.SendGroupMessageAsync(
-                    chatId: proposal.TelegramChatId,
+                    TelegramPlatformIds.Group(proposal.TelegramChatId, proposal.ThreadId),
-                    text: $"📣 Расписание обновлено после голосования за перенос сессии «{System.Net.WebUtility.HtmlEncode(proposal.Title)}».",
+                    $"📣 Расписание обновлено после голосования за перенос сессии «{System.Net.WebUtility.HtmlEncode(proposal.Title)}».",
-                    parseMode: ParseMode.Html,
+                    ct);
-                    cancellationToken: ct);
             }
         }
         catch (Exception ex)

src/GmRelay.Bot/Infrastructure/Health/BotHealthCheckHostedService.cs

@@ -0,0 +1,101 @@
+using System.Net;
+
+namespace GmRelay.Bot.Infrastructure.Health;
+
+public sealed class BotHealthCheckHostedService : IHostedService
+{
+    private readonly ILogger<BotHealthCheckHostedService> _logger;
+    private readonly string _prefix;
+    private HttpListener? _listener;
+    private CancellationTokenSource? _cts;
+    private Task? _listenerTask;
+
+    public BotHealthCheckHostedService(
+        ILogger<BotHealthCheckHostedService> logger,
+        IConfiguration configuration)
+    {
+        _logger = logger;
+        _prefix = configuration.GetValue("HealthCheck:Prefix", "http://+:8081/")!;
+    }
+
+    public Task StartAsync(CancellationToken cancellationToken)
+    {
+        _cts = new CancellationTokenSource();
+        _listener = new HttpListener();
+        _listener.Prefixes.Add(_prefix);
+        _listener.Start();
+
+        _logger.LogInformation("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("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 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 health check request");
+        }
+        finally
+        {
+            response.Close();
+        }
+    }
+}

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

@@ -0,0 +1,86 @@
+using Dapper;
+using GmRelay.Shared.Domain;
+using Npgsql;
+
+namespace GmRelay.Bot.Infrastructure.Scheduling;
+
+public interface ISessionTriggerStore
+{
+    Task<IReadOnlyList<Guid>> GetSessionsNeedingConfirmationAsync(DateTimeOffset now, CancellationToken ct);
+    Task<IReadOnlyList<Guid>> GetSessionsNeedingOneHourReminderAsync(DateTimeOffset now, CancellationToken ct);
+    Task<IReadOnlyList<Guid>> GetSessionsNeedingJoinLinkAsync(DateTimeOffset now, CancellationToken ct);
+}
+
+public sealed class DbSessionTriggerStore(NpgsqlDataSource dataSource) : ISessionTriggerStore
+{
+    private static readonly TimeSpan ConfirmationLeadTime = TimeSpan.FromHours(24);
+    private static readonly TimeSpan OneHourReminderLeadTime = TimeSpan.FromHours(1);
+    private static readonly TimeSpan JoinLinkLeadTime = TimeSpan.FromMinutes(5);
+
+    public async Task<IReadOnlyList<Guid>> GetSessionsNeedingConfirmationAsync(DateTimeOffset now, CancellationToken ct)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+
+        var results = await connection.QueryAsync<Guid>(
+            """
+            SELECT id
+            FROM sessions
+            WHERE status = @Planned
+              AND scheduled_at - @LeadTime <= @Now
+              AND confirmation_sent_at IS NULL
+            """,
+            new
+            {
+                Planned = SessionStatus.Planned,
+                LeadTime = ConfirmationLeadTime,
+                Now = now.UtcDateTime
+            });
+
+        return results.ToList();
+    }
+
+    public async Task<IReadOnlyList<Guid>> GetSessionsNeedingOneHourReminderAsync(DateTimeOffset now, CancellationToken ct)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+
+        var results = await connection.QueryAsync<Guid>(
+            """
+            SELECT id
+            FROM sessions
+            WHERE status IN (@Confirmed, @ConfirmationSent)
+              AND scheduled_at - @LeadTime <= @Now
+              AND one_hour_reminder_processed_at IS NULL
+            """,
+            new
+            {
+                Confirmed = SessionStatus.Confirmed,
+                ConfirmationSent = SessionStatus.ConfirmationSent,
+                LeadTime = OneHourReminderLeadTime,
+                Now = now.UtcDateTime
+            });
+
+        return results.ToList();
+    }
+
+    public async Task<IReadOnlyList<Guid>> GetSessionsNeedingJoinLinkAsync(DateTimeOffset now, CancellationToken ct)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+
+        var results = await connection.QueryAsync<Guid>(
+            """
+            SELECT id
+            FROM sessions
+            WHERE status = @Confirmed
+              AND scheduled_at - @LeadTime <= @Now
+              AND link_message_id IS NULL
+            """,
+            new
+            {
+                Confirmed = SessionStatus.Confirmed,
+                LeadTime = JoinLinkLeadTime,
+                Now = now.UtcDateTime
+            });
+
+        return results.ToList();
+    }
+}

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

@@ -0,0 +1,16 @@
+namespace GmRelay.Bot.Infrastructure.Scheduling;
+
+public interface ISystemClock
+{
+    DateTimeOffset UtcNow { get; }
+}
+
+public sealed class SystemClock : ISystemClock
+{
+    public DateTimeOffset UtcNow => DateTimeOffset.UtcNow;
+}
+
+public sealed class FakeSystemClock : ISystemClock
+{
+    public DateTimeOffset UtcNow { get; set; } = DateTimeOffset.UtcNow;
+}

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

@@ -1,31 +1,27 @@
-using Dapper;
-using GmRelay.Shared.Domain;
 using GmRelay.Bot.Features.Confirmation.SendConfirmation;
 using GmRelay.Bot.Features.Reminders.SendJoinLink;
 using GmRelay.Bot.Features.Reminders.SendOneHourReminder;
-using Npgsql;
 
 namespace GmRelay.Bot.Infrastructure.Scheduling;
 
 /// <summary>
 /// Stateless scheduler: wakes every 60 seconds, queries PostgreSQL for actionable sessions.
-/// Two triggers:
+/// Three triggers:
 ///   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(
-    NpgsqlDataSource dataSource,
+    ISessionTriggerStore triggerStore,
-    SendConfirmationHandler confirmationHandler,
+    ISendConfirmationHandler confirmationHandler,
-    SendOneHourReminderHandler oneHourReminderHandler,
+    ISendOneHourReminderHandler oneHourReminderHandler,
-    SendJoinLinkHandler joinLinkHandler,
+    ISendJoinLinkHandler joinLinkHandler,
+    ISystemClock clock,
     ILogger<SessionSchedulerService> logger) : BackgroundService
 {
     private static readonly TimeSpan TickInterval = TimeSpan.FromMinutes(1);
-    private static readonly TimeSpan ConfirmationLeadTime = TimeSpan.FromHours(24);
-    private static readonly TimeSpan OneHourReminderLeadTime = TimeSpan.FromHours(1);
-    private static readonly TimeSpan JoinLinkLeadTime = TimeSpan.FromMinutes(5);
 
     protected override async Task ExecuteAsync(CancellationToken stoppingToken)
     {
@@ -33,14 +29,11 @@ public sealed class SessionSchedulerService(
 
         using var timer = new PeriodicTimer(TickInterval);
 
-        // Run immediately on startup, then on each tick
         do
         {
             try
             {
-                await ProcessConfirmationTriggers(stoppingToken);
+                await TickAsync(stoppingToken);
-                await ProcessOneHourReminderTriggers(stoppingToken);
-                await ProcessJoinLinkTriggers(stoppingToken);
             }
             catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
             {
@@ -57,57 +50,30 @@ public sealed class SessionSchedulerService(
     }
 
     /// <summary>
-    /// T-1h trigger: process direct reminders according to the session notification mode.
+    /// Runs a single scheduler tick using the current clock time.
+    /// Public so it can be called from integration tests with a fake clock.
     /// </summary>
-    private async Task ProcessOneHourReminderTriggers(CancellationToken ct)
+    public async Task TickAsync(CancellationToken ct)
     {
-        await using var connection = await dataSource.OpenConnectionAsync(ct);
+        var now = clock.UtcNow;
 
-        var sessionIds = await connection.QueryAsync<Guid>(
+        await ProcessConfirmationTriggers(now, ct);
-            """
+        await ProcessOneHourReminderTriggers(now, ct);
-            SELECT id
+        await ProcessJoinLinkTriggers(now, ct);
-            FROM sessions
-            WHERE status IN (@Confirmed, @ConfirmationSent)
-              AND scheduled_at - @LeadTime <= now()
-              AND one_hour_reminder_processed_at IS NULL
-            """,
-            new
-            {
-                Confirmed = SessionStatus.Confirmed,
-                ConfirmationSent = SessionStatus.ConfirmationSent,
-                LeadTime = OneHourReminderLeadTime
-            });
-
-        foreach (var sessionId in sessionIds)
-        {
-            try
-            {
-                await oneHourReminderHandler.HandleAsync(sessionId, ct);
-                logger.LogInformation("One-hour reminder processed for session {SessionId}", sessionId);
-            }
-            catch (Exception ex)
-            {
-                logger.LogError(ex, "Failed to process one-hour reminder for session {SessionId}", sessionId);
-            }
-        }
     }
 
-    /// <summary>
+    private async Task ProcessConfirmationTriggers(DateTimeOffset now, CancellationToken ct)
-    /// T-24h trigger: find sessions that need confirmation requests sent.
-    /// Condition: status='Planned' AND scheduled_at minus 24h is in the past.
-    /// </summary>
-    private async Task ProcessConfirmationTriggers(CancellationToken ct)
     {
-        await using var connection = await dataSource.OpenConnectionAsync(ct);
+        IReadOnlyList<Guid> sessionIds;
-
+        try
-        var sessionIds = await connection.QueryAsync<Guid>(
+        {
-            """
+            sessionIds = await triggerStore.GetSessionsNeedingConfirmationAsync(now, ct);
-            SELECT id
+        }
-            FROM sessions
+        catch (Exception ex)
-            WHERE status = @Planned
+        {
-              AND scheduled_at - @LeadTime <= now()
+            logger.LogError(ex, "Failed to query confirmation triggers");
-            """,
+            return;
-            new { Planned = SessionStatus.Planned, LeadTime = ConfirmationLeadTime });
+        }
 
         foreach (var sessionId in sessionIds)
         {
@@ -123,23 +89,45 @@ public sealed class SessionSchedulerService(
         }
     }
 
-    /// <summary>
+    private async Task ProcessOneHourReminderTriggers(DateTimeOffset now, CancellationToken ct)
-    /// T-5min trigger: find confirmed sessions that need join links sent.
-    /// Condition: status='Confirmed' AND scheduled_at minus 5min is in the past AND link not yet sent.
-    /// </summary>
-    private async Task ProcessJoinLinkTriggers(CancellationToken ct)
     {
-        await using var connection = await dataSource.OpenConnectionAsync(ct);
+        IReadOnlyList<Guid> sessionIds;
+        try
+        {
+            sessionIds = await triggerStore.GetSessionsNeedingOneHourReminderAsync(now, ct);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to query one-hour reminder triggers");
+            return;
+        }
 
-        var sessionIds = await connection.QueryAsync<Guid>(
+        foreach (var sessionId in sessionIds)
-            """
+        {
-            SELECT id
+            try
-            FROM sessions
+            {
-            WHERE status = @Confirmed
+                await oneHourReminderHandler.HandleAsync(sessionId, ct);
-              AND scheduled_at - @LeadTime <= now()
+                logger.LogInformation("One-hour reminder processed for session {SessionId}", sessionId);
-              AND link_message_id IS NULL
+            }
-            """,
+            catch (Exception ex)
-            new { Confirmed = SessionStatus.Confirmed, LeadTime = JoinLinkLeadTime });
+            {
+                logger.LogError(ex, "Failed to process one-hour reminder for session {SessionId}", sessionId);
+            }
+        }
+    }
+
+    private async Task ProcessJoinLinkTriggers(DateTimeOffset now, CancellationToken ct)
+    {
+        IReadOnlyList<Guid> sessionIds;
+        try
+        {
+            sessionIds = await triggerStore.GetSessionsNeedingJoinLinkAsync(now, ct);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to query join-link triggers");
+            return;
+        }
 
         foreach (var sessionId in sessionIds)
         {

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

@@ -33,7 +33,7 @@ public static class BatchMessageEditor
                 replyMarkup: replyMarkup,
                 cancellationToken: ct);
         }
-        catch (Telegram.Bot.Exceptions.ApiRequestException ex)
+        catch (global::Telegram.Bot.Exceptions.ApiRequestException ex)
             when (ex.Message.Contains("there is no text in the message", StringComparison.OrdinalIgnoreCase))
         {
             // The batch message is a photo — use EditMessageCaption instead.

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

@@ -0,0 +1,29 @@
+using System.Globalization;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.Bot.Infrastructure.Telegram;
+
+internal static class TelegramPlatformIds
+{
+    public static PlatformGroup Group(long chatId, int? threadId = null, string? displayName = null) =>
+        new(
+            PlatformKind.Telegram,
+            chatId.ToString(CultureInfo.InvariantCulture),
+            displayName ?? "Telegram chat",
+            ExternalChannelId: chatId.ToString(CultureInfo.InvariantCulture),
+            ExternalThreadId: threadId?.ToString(CultureInfo.InvariantCulture));
+
+    public static PlatformUser User(long telegramId, string displayName, string? username = null) =>
+        new(
+            PlatformKind.Telegram,
+            telegramId.ToString(CultureInfo.InvariantCulture),
+            displayName,
+            username);
+
+    public static PlatformMessageRef Message(long chatId, int? threadId, int messageId) =>
+        new(
+            PlatformKind.Telegram,
+            chatId.ToString(CultureInfo.InvariantCulture),
+            threadId?.ToString(CultureInfo.InvariantCulture),
+            messageId.ToString(CultureInfo.InvariantCulture));
+}

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

@@ -0,0 +1,196 @@
+using System.Globalization;
+using GmRelay.Shared.Platform;
+using Telegram.Bot;
+using Telegram.Bot.Types;
+using Telegram.Bot.Types.Enums;
+using Telegram.Bot.Types.ReplyMarkups;
+
+namespace GmRelay.Bot.Infrastructure.Telegram;
+
+public sealed class TelegramPlatformMessenger(
+    ITelegramBotClient bot,
+    ILogger<TelegramPlatformMessenger> logger) : IPlatformMessenger
+{
+    public async Task<PlatformMessageRef> SendScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
+    {
+        EnsureTelegram(message.Group.Platform);
+
+        var chatId = ParseLong(message.Group.ExternalGroupId);
+        var threadId = ParseNullableInt(message.Group.ExternalThreadId);
+        var renderResult = TelegramSessionBatchRenderer.Render(message.View);
+        Message sentMessage;
+
+        if (!string.IsNullOrWhiteSpace(message.ImageReference) && renderResult.Text.Length <= 1024)
+        {
+            try
+            {
+                sentMessage = await bot.SendPhoto(
+                    chatId: chatId,
+                    messageThreadId: threadId,
+                    photo: InputFile.FromString(message.ImageReference),
+                    caption: renderResult.Text,
+                    parseMode: ParseMode.Html,
+                    replyMarkup: renderResult.Markup,
+                    cancellationToken: ct);
+            }
+            catch (Exception ex)
+            {
+                logger.LogWarning(ex, "Failed to send Telegram schedule image for group {ExternalGroupId}", message.Group.ExternalGroupId);
+                sentMessage = await SendScheduleTextMessage(chatId, threadId, renderResult.Text, renderResult.Markup, ct);
+            }
+        }
+        else
+        {
+            if (!string.IsNullOrWhiteSpace(message.ImageReference))
+            {
+                await TrySendScheduleImageOnly(chatId, threadId, message.View.Title, message.ImageReference, ct);
+            }
+
+            sentMessage = await SendScheduleTextMessage(chatId, threadId, renderResult.Text, renderResult.Markup, ct);
+        }
+
+        return new PlatformMessageRef(
+            PlatformKind.Telegram,
+            message.Group.ExternalGroupId,
+            message.Group.ExternalThreadId,
+            sentMessage.MessageId.ToString(CultureInfo.InvariantCulture));
+    }
+
+    public async Task UpdateScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
+    {
+        EnsureTelegram(message.Group.Platform);
+        var existingMessage = message.ExistingMessage;
+        if (existingMessage is null)
+        {
+            throw new ArgumentException("Existing schedule message reference is required.", nameof(message));
+        }
+
+        EnsureTelegram(existingMessage.Platform);
+        if (!string.Equals(message.Group.ExternalGroupId, existingMessage.ExternalGroupId, StringComparison.Ordinal) ||
+            !string.Equals(message.Group.ExternalThreadId, existingMessage.ExternalThreadId, StringComparison.Ordinal))
+        {
+            throw new ArgumentException("Existing schedule message reference must match the schedule group.", nameof(message));
+        }
+
+        var renderResult = TelegramSessionBatchRenderer.Render(message.View);
+        await BatchMessageEditor.EditBatchMessageAsync(
+            bot,
+            chatId: ParseLong(existingMessage.ExternalGroupId),
+            messageId: ParseInt(existingMessage.ExternalMessageId),
+            text: renderResult.Text,
+            replyMarkup: renderResult.Markup,
+            ct);
+    }
+
+    public Task SendGroupMessageAsync(PlatformGroup group, string htmlText, CancellationToken ct)
+    {
+        EnsureTelegram(group.Platform);
+        return bot.SendMessage(
+            chatId: ParseLong(group.ExternalGroupId),
+            messageThreadId: ParseNullableInt(group.ExternalThreadId),
+            text: htmlText,
+            parseMode: ParseMode.Html,
+            cancellationToken: ct);
+    }
+
+    public Task SendPrivateMessageAsync(PlatformPrivateMessage message, CancellationToken ct)
+    {
+        EnsureTelegram(message.Recipient.Platform);
+        return bot.SendMessage(
+            chatId: ParseLong(message.Recipient.ExternalUserId),
+            text: message.HtmlText,
+            parseMode: ParseMode.Html,
+            cancellationToken: ct);
+    }
+
+    public Task AnswerInteractionAsync(PlatformInteractionReply reply, CancellationToken ct) =>
+        bot.AnswerCallbackQuery(
+            callbackQueryId: reply.InteractionId,
+            text: reply.Text,
+            showAlert: reply.ShowAlert,
+            cancellationToken: ct);
+
+    public async Task SendCalendarFileAsync(PlatformCalendarFile file, CancellationToken ct)
+    {
+        EnsureTelegram(file.Group.Platform);
+
+        using var stream = new MemoryStream(file.Content);
+        await bot.SendDocument(
+            chatId: ParseLong(file.Group.ExternalGroupId),
+            messageThreadId: ParseNullableInt(file.Group.ExternalThreadId),
+            document: InputFile.FromStream(stream, file.FileName),
+            caption: file.CaptionHtml,
+            parseMode: ParseMode.Html,
+            replyMarkup: BuildActionsMarkup(file.Actions),
+            cancellationToken: ct);
+    }
+
+    private async Task<Message> SendScheduleTextMessage(
+        long chatId,
+        int? threadId,
+        string text,
+        InlineKeyboardMarkup markup,
+        CancellationToken ct) =>
+        await bot.SendMessage(
+            chatId: chatId,
+            messageThreadId: threadId,
+            text: text,
+            parseMode: ParseMode.Html,
+            replyMarkup: markup,
+            cancellationToken: ct);
+
+    private async Task TrySendScheduleImageOnly(
+        long chatId,
+        int? threadId,
+        string title,
+        string imageReference,
+        CancellationToken ct)
+    {
+        try
+        {
+            await bot.SendPhoto(
+                chatId: chatId,
+                messageThreadId: threadId,
+                photo: InputFile.FromString(imageReference),
+                caption: $"🎲 {System.Net.WebUtility.HtmlEncode(title)}",
+                parseMode: ParseMode.Html,
+                cancellationToken: ct);
+        }
+        catch (Exception ex)
+        {
+            logger.LogWarning(ex, "Failed to send Telegram schedule image for chat {ChatId}", chatId);
+        }
+    }
+
+    private static InlineKeyboardMarkup? BuildActionsMarkup(IReadOnlyList<PlatformMessageAction> actions)
+    {
+        if (actions.Count == 0)
+        {
+            return null;
+        }
+
+        return new InlineKeyboardMarkup(
+            actions.Select(action => new[]
+            {
+                Uri.TryCreate(action.Payload, UriKind.Absolute, out var uri) &&
+                (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps)
+                    ? InlineKeyboardButton.WithUrl(action.Label, action.Payload)
+                    : InlineKeyboardButton.WithCallbackData(action.Label, action.Payload)
+            }));
+    }
+
+    private static void EnsureTelegram(PlatformKind platform)
+    {
+        if (platform != PlatformKind.Telegram)
+        {
+            throw new NotSupportedException($"Telegram messenger cannot send messages for platform {platform}.");
+        }
+    }
+
+    private static long ParseLong(string value) => long.Parse(value, CultureInfo.InvariantCulture);
+
+    private static int ParseInt(string value) => int.Parse(value, CultureInfo.InvariantCulture);
+
+    private static int? ParseNullableInt(string? value) =>
+        string.IsNullOrWhiteSpace(value) ? null : int.Parse(value, CultureInfo.InvariantCulture);
+}

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

@@ -1,4 +1,5 @@
 // NOTE: duplicated in GmRelay.Web/Services/TelegramSessionBatchRenderer.cs
+using GmRelay.Shared.Domain;
 using GmRelay.Shared.Rendering;
 using Telegram.Bot.Types.ReplyMarkups;
 
@@ -20,6 +21,11 @@ public static class TelegramSessionBatchRenderer
                 ? $"👥 Места: {session.ActivePlayerCount}/{session.MaxPlayers.Value}\n"
                 : $"👥 Игроки ({session.ActivePlayerCount}):\n";
 
+            if (!string.IsNullOrEmpty(session.JoinLink))
+            {
+                messageText += $"🔗 <a href=\"{System.Net.WebUtility.HtmlEncode(session.JoinLink)}\">Ссылка на игру</a>\n";
+            }
+
             if (session.ActivePlayers.Count > 0)
             {
                 messageText += string.Join("\n", session.ActivePlayers.Select(p =>

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

@@ -0,0 +1,40 @@
+namespace GmRelay.Bot.Infrastructure.Telegram;
+
+public sealed record TelegramTopicDestination(
+    int? MessageThreadId,
+    bool ShouldCreateForumTopic,
+    bool TopicCreatedByBot);
+
+public static class TelegramTopicRouting
+{
+    public const string MissingForumTopicRightsMessage =
+        "Не удалось создать Telegram topic. Сделайте бота admin и включите право Manage Topics, затем повторите команду.";
+
+    public static TelegramTopicDestination ResolveNewScheduleDestination(
+        bool chatIsForum,
+        int? incomingMessageThreadId)
+    {
+        if (!chatIsForum)
+        {
+            return new TelegramTopicDestination(null, ShouldCreateForumTopic: false, TopicCreatedByBot: false);
+        }
+
+        if (incomingMessageThreadId.HasValue)
+        {
+            return new TelegramTopicDestination(
+                incomingMessageThreadId,
+                ShouldCreateForumTopic: false,
+                TopicCreatedByBot: false);
+        }
+
+        return new TelegramTopicDestination(null, ShouldCreateForumTopic: true, TopicCreatedByBot: true);
+    }
+
+    public static bool ShouldDeleteForumTopic(bool topicCreatedByBot, int remainingSessionsInTopic) =>
+        topicCreatedByBot && remainingSessionsInTopic == 0;
+
+    public static bool IsMissingForumTopicRightsError(string apiError) =>
+        apiError.Contains("not enough rights", StringComparison.OrdinalIgnoreCase) ||
+        apiError.Contains("CHAT_ADMIN_REQUIRED", StringComparison.OrdinalIgnoreCase) ||
+        apiError.Contains("not an administrator", StringComparison.OrdinalIgnoreCase);
+}

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

@@ -80,7 +80,7 @@ public sealed class UpdateRouter(
                 CallbackQueryId: query.Id,
                 ChatId: message.Chat.Id,
                 MessageId: message.MessageId);
-            
+
             await joinSessionHandler.HandleAsync(command, ct);
             return;
         }
@@ -105,6 +105,7 @@ public sealed class UpdateRouter(
                 TelegramUserId: query.From.Id,
                 CallbackQueryId: query.Id,
                 ChatId: message.Chat.Id,
+                MessageThreadId: message.MessageThreadId,
                 MessageId: message.MessageId);
 
             await cancelSessionHandler.HandleAsync(command, ct);
@@ -144,6 +145,7 @@ public sealed class UpdateRouter(
                 TelegramUserId: query.From.Id,
                 CallbackQueryId: query.Id,
                 ChatId: message.Chat.Id,
+                MessageThreadId: message.MessageThreadId,
                 MessageId: message.MessageId);
 
             await initiateRescheduleHandler.HandleAsync(command, ct);

src/GmRelay.Bot/Migrations/V011__add_calendar_subscriptions.sql

@@ -0,0 +1,11 @@
+CREATE TABLE calendar_subscriptions (
+    id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    token               TEXT UNIQUE NOT NULL,
+    user_telegram_id    BIGINT NOT NULL,
+    group_id            UUID REFERENCES game_groups(id) ON DELETE CASCADE,
+    filter_type         SMALLINT NOT NULL DEFAULT 0,
+    created_at          TIMESTAMPTZ NOT NULL DEFAULT now(),
+    expires_at          TIMESTAMPTZ
+);
+
+CREATE INDEX ix_calendar_subscriptions_user_telegram_id ON calendar_subscriptions (user_telegram_id);

src/GmRelay.Bot/Migrations/V012__add_attendance_stats.sql

@@ -0,0 +1,66 @@
+-- =============================================================
+-- Attendance statistics view for GM analytics
+-- Returns per-player aggregated metrics for a given game group.
+-- NOTE: waitlist count reflects CURRENT registration_status only.
+--       Full historical waitlist tracking will come with #15.
+-- =============================================================
+
+CREATE OR REPLACE FUNCTION get_group_attendance_stats(p_group_id UUID)
+RETURNS TABLE (
+    player_id           UUID,
+    display_name        VARCHAR,
+    telegram_username   VARCHAR,
+    total_sessions      BIGINT,
+    confirmed_count     BIGINT,
+    declined_count      BIGINT,
+    no_response_count   BIGINT,
+    waitlisted_count    BIGINT,
+    cancellation_affected_count BIGINT,
+    attendance_rate     NUMERIC
+) AS $$
+BEGIN
+    RETURN QUERY
+    WITH player_sessions AS (
+        SELECT
+            sp.player_id,
+            s.id                AS session_id,
+            sp.rsvp_status,
+            sp.registration_status,
+            s.status            AS session_status,
+            s.scheduled_at
+        FROM session_participants sp
+        JOIN sessions s ON s.id = sp.session_id
+        WHERE s.group_id = p_group_id
+    ),
+    player_totals AS (
+        SELECT
+            ps.player_id,
+            COUNT(*) FILTER (WHERE ps.session_status <> 'Cancelled')                      AS total_sessions,
+            COUNT(*) FILTER (WHERE ps.rsvp_status = 'Confirmed' AND ps.session_status <> 'Cancelled') AS confirmed_count,
+            COUNT(*) FILTER (WHERE ps.rsvp_status = 'Declined' AND ps.session_status <> 'Cancelled')  AS declined_count,
+            COUNT(*) FILTER (WHERE ps.rsvp_status = 'Pending' AND ps.scheduled_at < NOW() AND ps.session_status <> 'Cancelled') AS no_response_count,
+            COUNT(*) FILTER (WHERE ps.registration_status = 'Waitlisted' AND ps.session_status <> 'Cancelled') AS waitlisted_count,
+            COUNT(*) FILTER (WHERE ps.session_status = 'Cancelled')                        AS cancellation_affected_count
+        FROM player_sessions ps
+        GROUP BY ps.player_id
+    )
+    SELECT
+        pt.player_id,
+        p.display_name,
+        COALESCE(p.external_username, p.telegram_username) AS telegram_username,
+        pt.total_sessions,
+        pt.confirmed_count,
+        pt.declined_count,
+        pt.no_response_count,
+        pt.waitlisted_count,
+        pt.cancellation_affected_count,
+        ROUND(
+            100.0 * pt.confirmed_count
+            / NULLIF(pt.total_sessions, 0),
+            1
+        ) AS attendance_rate
+    FROM player_totals pt
+    JOIN players p ON p.id = pt.player_id
+    ORDER BY pt.confirmed_count DESC, pt.total_sessions DESC;
+END;
+$$ LANGUAGE plpgsql STABLE;

src/GmRelay.Bot/Migrations/V013__add_session_audit_log.sql

@@ -0,0 +1,16 @@
+CREATE EXTENSION IF NOT EXISTS "pgcrypto";
+
+CREATE TABLE session_audit_log (
+    id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    session_id          UUID NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
+    actor_telegram_id   BIGINT NOT NULL,
+    actor_name          VARCHAR(255) NOT NULL,
+    change_type         VARCHAR(50) NOT NULL
+                        CHECK (change_type IN ('Title','Time','Link','MaxPlayers','Status','WaitlistPromote','PlayerRemoved','BatchRescheduled','Cancelled')),
+    old_value           TEXT,
+    new_value           TEXT,
+    changed_at          TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX ix_session_audit_log_session_id ON session_audit_log(session_id);
+CREATE INDEX ix_session_audit_log_changed_at ON session_audit_log(changed_at);

src/GmRelay.Bot/Migrations/V014__add_confirmation_sent_at.sql

@@ -0,0 +1,13 @@
+ALTER TABLE sessions
+    ADD COLUMN confirmation_sent_at TIMESTAMPTZ;
+
+-- Update existing ConfirmationSent sessions to have a sentinel value
+-- so they don't get re-processed after migration
+UPDATE sessions
+SET confirmation_sent_at = now()
+WHERE status = 'ConfirmationSent';
+
+-- Partial index for efficient T-24h query
+CREATE INDEX ix_sessions_confirmation_reminders ON sessions (scheduled_at)
+    WHERE status = 'Planned'
+      AND confirmation_sent_at IS NULL;

src/GmRelay.Bot/Migrations/V015__add_topic_ownership.sql

@@ -0,0 +1,6 @@
+ALTER TABLE sessions
+    ADD COLUMN topic_created_by_bot BOOLEAN NOT NULL DEFAULT FALSE;
+
+UPDATE sessions
+SET topic_created_by_bot = TRUE
+WHERE thread_id IS NOT NULL;

src/GmRelay.Bot/Migrations/V016__add_platform_identity.sql

@@ -0,0 +1,119 @@
+-- =============================================================
+-- V016: Add platform identity columns and platform_messages table
+-- =============================================================
+-- Scope: Prepare schema for multi-platform support (Discord, etc).
+-- Legacy telegram_* columns are retained for backward compatibility.
+-- =============================================================
+
+-- -- Players: platform-agnostic identity
+ALTER TABLE players
+    ADD COLUMN platform          VARCHAR(50),
+    ADD COLUMN external_user_id  VARCHAR(255),
+    ADD COLUMN external_username VARCHAR(255);
+
+CREATE UNIQUE INDEX ix_players_platform_external_user_id
+    ON players (platform, external_user_id)
+    WHERE platform IS NOT NULL AND external_user_id IS NOT NULL;
+
+-- -- Game groups: platform-agnostic identity
+ALTER TABLE game_groups
+    ADD COLUMN platform           VARCHAR(50),
+    ADD COLUMN external_group_id  VARCHAR(255),
+    ADD COLUMN external_channel_id VARCHAR(255);
+
+CREATE UNIQUE INDEX ix_game_groups_platform_external_group_id
+    ON game_groups (platform, external_group_id)
+    WHERE platform IS NOT NULL AND external_group_id IS NOT NULL;
+
+-- -- Backfill existing Telegram data
+UPDATE players
+   SET platform          = 'Telegram',
+       external_user_id  = telegram_id::TEXT,
+       external_username = telegram_username
+ WHERE platform IS NULL;
+
+UPDATE game_groups
+   SET platform          = 'Telegram',
+       external_group_id = telegram_chat_id::TEXT
+ WHERE platform IS NULL;
+
+-- -- Platform messages: store per-platform message references
+CREATE TABLE platform_messages (
+    id                   UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    platform             VARCHAR(50) NOT NULL,
+    group_id             UUID REFERENCES game_groups(id) ON DELETE CASCADE,
+    batch_id             UUID,
+    session_id           UUID REFERENCES sessions(id) ON DELETE CASCADE,
+    external_channel_id  VARCHAR(255),
+    external_thread_id   VARCHAR(255),
+    external_message_id  VARCHAR(255) NOT NULL,
+    purpose              VARCHAR(50) NOT NULL,
+    created_at           TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX ix_platform_messages_group_id     ON platform_messages(group_id);
+CREATE INDEX ix_platform_messages_batch_id     ON platform_messages(batch_id);
+CREATE INDEX ix_platform_messages_session_id   ON platform_messages(session_id);
+CREATE INDEX ix_platform_messages_platform_message
+    ON platform_messages (platform, external_message_id);
+
+-- -- Recreate attendance stats function for new columns (prod back-compat)
+CREATE OR REPLACE FUNCTION get_group_attendance_stats(p_group_id UUID)
+RETURNS TABLE (
+    player_id           UUID,
+    display_name        VARCHAR,
+    telegram_username   VARCHAR,
+    total_sessions      BIGINT,
+    confirmed_count     BIGINT,
+    declined_count      BIGINT,
+    no_response_count   BIGINT,
+    waitlisted_count    BIGINT,
+    cancellation_affected_count BIGINT,
+    attendance_rate     NUMERIC
+) AS $$
+BEGIN
+    RETURN QUERY
+    WITH player_sessions AS (
+        SELECT
+            sp.player_id,
+            s.id                AS session_id,
+            sp.rsvp_status,
+            sp.registration_status,
+            s.status            AS session_status,
+            s.scheduled_at
+        FROM session_participants sp
+        JOIN sessions s ON s.id = sp.session_id
+        WHERE s.group_id = p_group_id
+    ),
+    player_totals AS (
+        SELECT
+            ps.player_id,
+            COUNT(*) FILTER (WHERE ps.session_status <> 'Cancelled')                      AS total_sessions,
+            COUNT(*) FILTER (WHERE ps.rsvp_status = 'Confirmed' AND ps.session_status <> 'Cancelled') AS confirmed_count,
+            COUNT(*) FILTER (WHERE ps.rsvp_status = 'Declined' AND ps.session_status <> 'Cancelled')  AS declined_count,
+            COUNT(*) FILTER (WHERE ps.rsvp_status = 'Pending' AND ps.scheduled_at < NOW() AND ps.session_status <> 'Cancelled') AS no_response_count,
+            COUNT(*) FILTER (WHERE ps.registration_status = 'Waitlisted' AND ps.session_status <> 'Cancelled') AS waitlisted_count,
+            COUNT(*) FILTER (WHERE ps.session_status = 'Cancelled')                        AS cancellation_affected_count
+        FROM player_sessions ps
+        GROUP BY ps.player_id
+    )
+    SELECT
+        pt.player_id,
+        p.display_name,
+        COALESCE(p.external_username, p.telegram_username) AS telegram_username,
+        pt.total_sessions,
+        pt.confirmed_count,
+        pt.declined_count,
+        pt.no_response_count,
+        pt.waitlisted_count,
+        pt.cancellation_affected_count,
+        ROUND(
+            100.0 * pt.confirmed_count
+            / NULLIF(pt.total_sessions, 0),
+            1
+        ) AS attendance_rate
+    FROM player_totals pt
+    JOIN players p ON p.id = pt.player_id
+    ORDER BY pt.confirmed_count DESC, pt.total_sessions DESC;
+END;
+$$ LANGUAGE plpgsql STABLE;

src/GmRelay.Bot/Program.cs

@@ -6,9 +6,11 @@ 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.Bot.Infrastructure.Health;
 using GmRelay.Bot.Infrastructure.Logging;
 using GmRelay.Bot.Infrastructure.Scheduling;
 using GmRelay.Bot.Infrastructure.Telegram;
+using GmRelay.Shared.Platform;
 using Npgsql;
 using Telegram.Bot;
 
@@ -49,13 +51,17 @@ builder.Services.AddSingleton<ITelegramBotClient>(sp =>
     return new TelegramBotClient(token);
 });
 builder.Services.AddSingleton<ITelegramUpdateSource, TelegramUpdateSource>();
+builder.Services.AddSingleton<IPlatformMessenger, TelegramPlatformMessenger>();
 
 // ── 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<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<JoinSessionHandler>();
 builder.Services.AddSingleton<LeaveSessionHandler>();
@@ -74,10 +80,17 @@ builder.Services.AddSingleton<ITelegramUpdateHandler>(sp => sp.GetRequiredServic
 builder.Services.AddHostedService<TelegramMiniAppMenuButtonService>();
 builder.Services.AddHostedService<TelegramBotService>();
 
+// ── Clock and scheduling ──────────────────────────────────────────────
+builder.Services.AddSingleton<ISystemClock, SystemClock>();
+builder.Services.AddSingleton<ISessionTriggerStore, DbSessionTriggerStore>();
+
 // ── Session scheduler ────────────────────────────────────────────────
 builder.Services.AddHostedService<SessionSchedulerService>();
 builder.Services.AddHostedService<RescheduleVotingDeadlineService>();
 
+// ── Health check server ──────────────────────────────────────────────
+builder.Services.AddHostedService<BotHealthCheckHostedService>();
+
 var host = builder.Build();
 
 // ── Run database migrations on startup ───────────────────────────────

src/GmRelay.Bot/appsettings.json

@@ -9,5 +9,8 @@
   "Telegram": {
     "BotToken": "",
     "MiniAppUrl": ""
+  },
+  "Web": {
+    "BaseUrl": ""
   }
 }

src/GmRelay.Bot/packages.lock.json

@@ -0,0 +1,689 @@
+{
+  "version": 1,
+  "dependencies": {
+    "net10.0": {
+      "Aspire.Npgsql": {
+        "type": "Direct",
+        "requested": "[13.2.2, )",
+        "resolved": "13.2.2",
+        "contentHash": "nEYgziWN7hksgEQEWy24JypcMCU8gKYcIIyPL05JfdXxUWuPRLotH/KOeuHevAjSEOYkL3dtGakBkJAuPobGmA==",
+        "dependencies": {
+          "AspNetCore.HealthChecks.NpgSql": "9.0.0",
+          "Microsoft.Extensions.Configuration.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Configuration.Binder": "10.0.5",
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Diagnostics.HealthChecks": "10.0.5",
+          "Microsoft.Extensions.Hosting.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Logging.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Options": "10.0.5",
+          "Microsoft.Extensions.Primitives": "10.0.5",
+          "Npgsql.DependencyInjection": "10.0.1",
+          "Npgsql.OpenTelemetry": "10.0.1",
+          "OpenTelemetry.Extensions.Hosting": "1.15.0"
+        }
+      },
+      "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=="
+      },
+      "dbup-postgresql": {
+        "type": "Direct",
+        "requested": "[7.0.1, )",
+        "resolved": "7.0.1",
+        "contentHash": "mRnmENWWPuuMZ538gOd1mZnzucx6FQk0anmw3EABjGfcbp24FDb9QdGepYrDiaM8K9s5/gd49+5cmBOlniH/lg==",
+        "dependencies": {
+          "Npgsql": "10.0.1",
+          "dbup-core": "6.1.1"
+        }
+      },
+      "Microsoft.DotNet.ILCompiler": {
+        "type": "Direct",
+        "requested": "[10.0.5, )",
+        "resolved": "10.0.5",
+        "contentHash": "yadTZIkStCVsG8nGwvfroSfBApPsgjQbodQyaIfp53dgayE0qhZpywixiCB6lx57JYQ+KVg1m1AFLrj54pxpZg=="
+      },
+      "Microsoft.Extensions.Hosting": {
+        "type": "Direct",
+        "requested": "[10.0.5, )",
+        "resolved": "10.0.5",
+        "contentHash": "8i7e5IBdiKLNqt/+ciWrS8U95Rv5DClaaj7ulkZbimnCi4uREWd+lXzkp3joofFuIPOlAzV4AckxLTIELv2jdg==",
+        "dependencies": {
+          "Microsoft.Extensions.Configuration": "10.0.5",
+          "Microsoft.Extensions.Configuration.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Configuration.Binder": "10.0.5",
+          "Microsoft.Extensions.Configuration.CommandLine": "10.0.5",
+          "Microsoft.Extensions.Configuration.EnvironmentVariables": "10.0.5",
+          "Microsoft.Extensions.Configuration.FileExtensions": "10.0.5",
+          "Microsoft.Extensions.Configuration.Json": "10.0.5",
+          "Microsoft.Extensions.Configuration.UserSecrets": "10.0.5",
+          "Microsoft.Extensions.DependencyInjection": "10.0.5",
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Diagnostics": "10.0.5",
+          "Microsoft.Extensions.FileProviders.Abstractions": "10.0.5",
+          "Microsoft.Extensions.FileProviders.Physical": "10.0.5",
+          "Microsoft.Extensions.Hosting.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Logging": "10.0.5",
+          "Microsoft.Extensions.Logging.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Logging.Configuration": "10.0.5",
+          "Microsoft.Extensions.Logging.Console": "10.0.5",
+          "Microsoft.Extensions.Logging.Debug": "10.0.5",
+          "Microsoft.Extensions.Logging.EventLog": "10.0.5",
+          "Microsoft.Extensions.Logging.EventSource": "10.0.5",
+          "Microsoft.Extensions.Options": "10.0.5"
+        }
+      },
+      "Microsoft.NET.ILLink.Tasks": {
+        "type": "Direct",
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+        "resolved": "10.0.5",
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+      },
+      "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, )",
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+      },
+      "Telegram.Bot": {
+        "type": "Direct",
+        "requested": "[22.9.5.3, )",
+        "resolved": "22.9.5.3",
+        "contentHash": "7u8rZU9Vx9XEyIm6pB+dAlITsi1v63I+hKo7IEXGiQZnVjzvZgPs9yDCP17/Cwm7lgjCNEqknlbv/yoBnsUYFw==",
+        "dependencies": {
+          "Microsoft.Extensions.Options.ConfigurationExtensions": "8.0.0"
+        }
+      },
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+        "type": "Transitive",
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+        "dependencies": {
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+          "Npgsql": "8.0.3"
+        }
+      },
+      "dbup-core": {
+        "type": "Transitive",
+        "resolved": "6.1.1",
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+        "dependencies": {
+          "Microsoft.Extensions.Logging.Abstractions": "8.0.0"
+        }
+      },
+      "Microsoft.Extensions.AmbientMetadata.Application": {
+        "type": "Transitive",
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+        "dependencies": {
+          "Microsoft.Extensions.Configuration": "10.0.2",
+          "Microsoft.Extensions.Hosting.Abstractions": "10.0.2",
+          "Microsoft.Extensions.Options.ConfigurationExtensions": "10.0.2"
+        }
+      },
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+        "dependencies": {
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+          "Microsoft.Extensions.ObjectPool": "10.0.2"
+        }
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+        "dependencies": {
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+          "Microsoft.Extensions.Configuration.Abstractions": "10.0.5",
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+          "Microsoft.Extensions.FileProviders.Abstractions": "10.0.5"
+        }
+      },
+      "Microsoft.Extensions.Configuration.UserSecrets": {
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+        "resolved": "8.4.2",
+        "contentHash": "GZ9vRVmR0jV2JtZavt+pGUsQ1O1cuRKG7R7VOZI6ZDy9y6RNPvRvXK1tuS4ffUrv8L0FTea59oEuQzgS0R7zSA==",
+        "dependencies": {
+          "Microsoft.Extensions.Logging.Abstractions": "8.0.0",
+          "Microsoft.Extensions.Options": "8.0.0",
+          "Polly.Core": "8.4.2"
+        }
+      },
+      "Polly.RateLimiting": {
+        "type": "Transitive",
+        "resolved": "8.4.2",
+        "contentHash": "ehTImQ/eUyO07VYW2WvwSmU9rRH200SKJ/3jku9rOkyWE0A2JxNFmAVms8dSn49QLSjmjFRRSgfNyOgr/2PSmA==",
+        "dependencies": {
+          "Polly.Core": "8.4.2",
+          "System.Threading.RateLimiting": "8.0.0"
+        }
+      },
+      "System.Diagnostics.EventLog": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "wugvy+pBVzjQEnRs9wMTWwoaeNFX3hsaHeVHFDIvJSWXp7wfmNWu3mxAwBIE6pyW+g6+rHa1Of5fTzb0QVqUTA=="
+      },
+      "System.Threading.RateLimiting": {
+        "type": "Transitive",
+        "resolved": "8.0.0",
+        "contentHash": "7mu9v0QDv66ar3DpGSZHg9NuNcxDaaAcnMULuZlaTpP9+hwXhrxNGsF5GmLkSHxFdb5bBc1TzeujsRgTrPWi+Q=="
+      },
+      "gmrelay.servicedefaults": {
+        "type": "Project",
+        "dependencies": {
+          "Microsoft.Extensions.Http.Resilience": "[10.2.0, )",
+          "Microsoft.Extensions.ServiceDiscovery": "[10.2.0, )",
+          "OpenTelemetry.Exporter.OpenTelemetryProtocol": "[1.15.3, )",
+          "OpenTelemetry.Extensions.Hosting": "[1.15.3, )",
+          "OpenTelemetry.Instrumentation.AspNetCore": "[1.15.2, )",
+          "OpenTelemetry.Instrumentation.Http": "[1.15.1, )",
+          "OpenTelemetry.Instrumentation.Runtime": "[1.15.1, )"
+        }
+      },
+      "gmrelay.shared": {
+        "type": "Project"
+      }
+    },
+    "net10.0/win-x64": {
+      "Microsoft.DotNet.ILCompiler": {
+        "type": "Direct",
+        "requested": "[10.0.5, )",
+        "resolved": "10.0.5",
+        "contentHash": "yadTZIkStCVsG8nGwvfroSfBApPsgjQbodQyaIfp53dgayE0qhZpywixiCB6lx57JYQ+KVg1m1AFLrj54pxpZg==",
+        "dependencies": {
+          "runtime.win-x64.Microsoft.DotNet.ILCompiler": "10.0.5"
+        }
+      },
+      "runtime.win-x64.Microsoft.DotNet.ILCompiler": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "vblLkpVhSDYOmrEW0jypX7YVtLg7idU1QzUyx45ZdZ2sFUSSf3mYFCr0FW3+KZgXWpN1ve9ZPrxNywvHISF4bA=="
+      },
+      "System.Diagnostics.EventLog": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "wugvy+pBVzjQEnRs9wMTWwoaeNFX3hsaHeVHFDIvJSWXp7wfmNWu3mxAwBIE6pyW+g6+rHa1Of5fTzb0QVqUTA=="
+      }
+    }
+  }
+}

src/GmRelay.ServiceDefaults/packages.lock.json

@@ -0,0 +1,181 @@
+{
+  "version": 1,
+  "dependencies": {
+    "net10.0": {
+      "Microsoft.Extensions.Http.Resilience": {
+        "type": "Direct",
+        "requested": "[10.2.0, )",
+        "resolved": "10.2.0",
+        "contentHash": "Lg+OjBW+ODDbM4Ax4LoERvQ1dqSZ8I2gQc2+B0/WOWl2+PunLJ3xb3x8MtHGfcb/Mp98RoMpwRKm6Aj9mzXwrA==",
+        "dependencies": {
+          "Microsoft.Extensions.Http.Diagnostics": "10.2.0",
+          "Microsoft.Extensions.Resilience": "10.2.0"
+        }
+      },
+      "Microsoft.Extensions.ServiceDiscovery": {
+        "type": "Direct",
+        "requested": "[10.2.0, )",
+        "resolved": "10.2.0",
+        "contentHash": "AHTPfiKodj66xA8RwRkFD4q11V2AvzcuDsujv6ViPkOPtvBEYcPVplHakK56pPzWlX08MDS+TAQXfFXAeP7J5w==",
+        "dependencies": {
+          "Microsoft.Extensions.ServiceDiscovery.Abstractions": "10.2.0"
+        }
+      },
+      "OpenTelemetry.Exporter.OpenTelemetryProtocol": {
+        "type": "Direct",
+        "requested": "[1.15.3, )",
+        "resolved": "1.15.3",
+        "contentHash": "FEXJepcseTGbATiCkUfP7ipoFEYYfl/0UmmUwi0KxCPg9PaUA8ab2P1LGopK+/HExasJ1ZutFhZrN6WvUIR23g==",
+        "dependencies": {
+          "OpenTelemetry": "1.15.3"
+        }
+      },
+      "OpenTelemetry.Extensions.Hosting": {
+        "type": "Direct",
+        "requested": "[1.15.3, )",
+        "resolved": "1.15.3",
+        "contentHash": "u8n/W8yIlqv0BXZmvId1iVaeWXG42tGKdTkuLYg5g57Y/r9CeUNzqtrSHNdG5IoO8iPX79w3v+WsbAHgUQbfeg==",
+        "dependencies": {
+          "OpenTelemetry": "1.15.3"
+        }
+      },
+      "OpenTelemetry.Instrumentation.AspNetCore": {
+        "type": "Direct",
+        "requested": "[1.15.2, )",
+        "resolved": "1.15.2",
+        "contentHash": "2nPd7r0ug/gd6/CNFL6Rlu+RSQ9WYGSGHAYQ1ssbSqyzKJpqTunfx2I/1O0WB5k+L0cyXbG4XVZpoSoUc3M7wg==",
+        "dependencies": {
+          "OpenTelemetry.Api.ProviderBuilderExtensions": "[1.15.3, 2.0.0)"
+        }
+      },
+      "OpenTelemetry.Instrumentation.Http": {
+        "type": "Direct",
+        "requested": "[1.15.1, )",
+        "resolved": "1.15.1",
+        "contentHash": "vFO4Fj/dXkoVNGo/nhoGpO2zYQmZwr4jTID7oRGo+XlQ8LqksyZjUXQ4p39RfUvTID7IzzL8Qe71tW7CcAFymA==",
+        "dependencies": {
+          "OpenTelemetry.Api.ProviderBuilderExtensions": "[1.15.3, 2.0.0)"
+        }
+      },
+      "OpenTelemetry.Instrumentation.Runtime": {
+        "type": "Direct",
+        "requested": "[1.15.1, )",
+        "resolved": "1.15.1",
+        "contentHash": "cpPwlUT5HXcLGPaIgsbSy0W9eFYAPGVbTP1p8/uyQ4Osvf5BJuPpEXE7crL09SmEd44r0DGNKDtsqxaAz0HxQw==",
+        "dependencies": {
+          "OpenTelemetry.Api": "[1.15.3, 2.0.0)"
+        }
+      },
+      "SecurityCodeScan.VS2019": {
+        "type": "Direct",
+        "requested": "[5.6.7, )",
+        "resolved": "5.6.7",
+        "contentHash": "WIE9RJswdSc2j+rLz2gW6U+gMUjMHzY2j7C/CL8/R2olXNM/+twarfMnWqm+rZodDBvaYDApJyxM8mVYf9FGrQ=="
+      },
+      "Microsoft.Extensions.AmbientMetadata.Application": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "CNrEjaOCZ8d1HtB0mvpiX4EWxLkee2xy+CsYXxmsEYJSFgw3OmF9pIhP/tCTeYBHhpsKJj5wM63G8IBFGxAcsw=="
+      },
+      "Microsoft.Extensions.Compliance.Abstractions": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "1a4xDAT6fRyP8t419q3WvWMmMslDTvI7OAZLWBhn5rysFG0bl5xFenTswd1xAbT/3u3mx4Xyb5bPx+V+18tJeQ=="
+      },
+      "Microsoft.Extensions.DependencyInjection.AutoActivation": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "Z/OI261l7LnxyODKPx0trQyIHFyicCR/akfn64lGOjPcf4FpAZ7ePAGl2HPvQBUBSNfPTF0gWeCfuFmyftMgYA=="
+      },
+      "Microsoft.Extensions.Diagnostics.ExceptionSummarization": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "3qMK1D40D10kb5TdBtFJpzz6/WH0NinWs68ZZS8jCFgHMXDiOjGiPOneMmIocCP/wnUUW4Hzf8lMsIE1xIGxDA=="
+      },
+      "Microsoft.Extensions.Http.Diagnostics": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "I0FBgF6yZRwYH9E3KQ2vHm80YZ7YBj+52GDsmOWXPBv/p15b/wUoNupV9kw3LnSNVsWMqlGbiuZgBnHpMwPh+Q==",
+        "dependencies": {
+          "Microsoft.Extensions.Telemetry": "10.2.0"
+        }
+      },
+      "Microsoft.Extensions.Resilience": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "v4WOdAOFxB3AcsUkZWNcHL3mYzs4KAPtHO8rkoQlFKOBoD3KyjjAL+h3tRwSK5i4UpF/yhxsQRY0JxKj4osxxw==",
+        "dependencies": {
+          "Microsoft.Extensions.Diagnostics.ExceptionSummarization": "10.2.0",
+          "Microsoft.Extensions.Telemetry.Abstractions": "10.2.0",
+          "Polly.Extensions": "8.4.2",
+          "Polly.RateLimiting": "8.4.2"
+        }
+      },
+      "Microsoft.Extensions.ServiceDiscovery.Abstractions": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "sANlOvfqfw/yfych4CLlHSKSWzIie6mQG7w83gVur1foNOafyHxcgpoQMvBf+KiB4Tpls6P1/Z77IIQSK8hxFg=="
+      },
+      "Microsoft.Extensions.Telemetry": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "ssW5gosYlewNH/ISTyaLD/XfJT4GSjwShOUKv61fpXrqVmHkhuIA/5bBAGStM1XbzJjt9IG2vzfdHTu4zlX9Ew==",
+        "dependencies": {
+          "Microsoft.Extensions.AmbientMetadata.Application": "10.2.0",
+          "Microsoft.Extensions.DependencyInjection.AutoActivation": "10.2.0",
+          "Microsoft.Extensions.Telemetry.Abstractions": "10.2.0"
+        }
+      },
+      "Microsoft.Extensions.Telemetry.Abstractions": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "6V4V6NX6RLUYWwV89DeW/4zK5xOycYHWhsfMXSpKVGgMHfXcczmbk6hBeqTnRPzhpATYcOWlmA6hk1jgdxUugA==",
+        "dependencies": {
+          "Microsoft.Extensions.Compliance.Abstractions": "10.2.0"
+        }
+      },
+      "OpenTelemetry": {
+        "type": "Transitive",
+        "resolved": "1.15.3",
+        "contentHash": "N0i6WjPoHPbZyms1ugbDIFAJFuGlpeExJMU/+XSL0lQRUkg/D0utFkDoLXf8Z1km5B+xVZ2GyMXXiX8qdeNmPg==",
+        "dependencies": {
+          "OpenTelemetry.Api.ProviderBuilderExtensions": "1.15.3"
+        }
+      },
+      "OpenTelemetry.Api": {
+        "type": "Transitive",
+        "resolved": "1.15.3",
+        "contentHash": "fX+fkCysfPut+qCcT3bKqyX4QN9Saf4CgX8HLOHywEVD+Xr7sULtfuypITpoDysjx8R59dn/3mWhgimMH8cm/g=="
+      },
+      "OpenTelemetry.Api.ProviderBuilderExtensions": {
+        "type": "Transitive",
+        "resolved": "1.15.3",
+        "contentHash": "SYn0lqYDwLMWhv/zlNGsQcl2yX++yTumanX46bmOZE/ZDOd1WjPBO2kZaZgKLEZTZk48pavIFGJ6vOvxXgWVFQ==",
+        "dependencies": {
+          "OpenTelemetry.Api": "1.15.3"
+        }
+      },
+      "Polly.Core": {
+        "type": "Transitive",
+        "resolved": "8.4.2",
+        "contentHash": "BpE2I6HBYYA5tF0Vn4eoQOGYTYIK1BlF5EXVgkWGn3mqUUjbXAr13J6fZVbp7Q3epRR8yshacBMlsHMhpOiV3g=="
+      },
+      "Polly.Extensions": {
+        "type": "Transitive",
+        "resolved": "8.4.2",
+        "contentHash": "GZ9vRVmR0jV2JtZavt+pGUsQ1O1cuRKG7R7VOZI6ZDy9y6RNPvRvXK1tuS4ffUrv8L0FTea59oEuQzgS0R7zSA==",
+        "dependencies": {
+          "Polly.Core": "8.4.2"
+        }
+      },
+      "Polly.RateLimiting": {
+        "type": "Transitive",
+        "resolved": "8.4.2",
+        "contentHash": "ehTImQ/eUyO07VYW2WvwSmU9rRH200SKJ/3jku9rOkyWE0A2JxNFmAVms8dSn49QLSjmjFRRSgfNyOgr/2PSmA==",
+        "dependencies": {
+          "Polly.Core": "8.4.2"
+        }
+      }
+    }
+  }
+}

src/GmRelay.Shared/Domain/CalendarSubscriptionFilter.cs

@@ -0,0 +1,7 @@
+namespace GmRelay.Shared.Domain;
+
+public enum CalendarSubscriptionFilter
+{
+    AllMyGroups = 0,
+    SpecificGroup = 1
+}

src/GmRelay.Shared/Domain/MoscowTime.cs

@@ -21,7 +21,7 @@ public static class MoscowTime
 
     public static bool TryParseMoscow(string text, out DateTimeOffset utcTime)
     {
-        if (DateTime.TryParseExact(text, new[] { "dd.MM.yyyy HH:mm", "dd.MM.yyyy H:mm", "d.MM.yyyy HH:mm" }, 
+        if (DateTime.TryParseExact(text, new[] { "dd.MM.yyyy HH:mm", "dd.MM.yyyy H:mm", "d.MM.yyyy HH:mm" },
             System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.None, out var localDt))
         {
             utcTime = new DateTimeOffset(localDt, MoscowOffset).ToUniversalTime();

src/GmRelay.Shared/Platform/IPlatformMessenger.cs

@@ -0,0 +1,16 @@
+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);
+}

src/GmRelay.Shared/Platform/PlatformGroup.cs

@@ -0,0 +1,8 @@
+namespace GmRelay.Shared.Platform;
+
+public sealed record PlatformGroup(
+    PlatformKind Platform,
+    string ExternalGroupId,
+    string DisplayName,
+    string? ExternalChannelId = null,
+    string? ExternalThreadId = null);

src/GmRelay.Shared/Platform/PlatformKind.cs

@@ -0,0 +1,8 @@
+namespace GmRelay.Shared.Platform;
+
+public enum PlatformKind
+{
+    Telegram = 0,
+    Discord = 1,
+    Max = 2
+}

src/GmRelay.Shared/Platform/PlatformMessageContracts.cs

@@ -0,0 +1,36 @@
+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);

src/GmRelay.Shared/Platform/PlatformUser.cs

@@ -0,0 +1,7 @@
+namespace GmRelay.Shared.Platform;
+
+public sealed record PlatformUser(
+    PlatformKind Platform,
+    string ExternalUserId,
+    string DisplayName,
+    string? ExternalUsername);

src/GmRelay.Shared/Rendering/SessionBatchDto.cs

@@ -1,4 +1,4 @@
 namespace GmRelay.Shared.Rendering;
 
-public sealed record SessionBatchDto(Guid SessionId, DateTime ScheduledAt, string Status, int? MaxPlayers);
+public sealed record SessionBatchDto(Guid SessionId, DateTime ScheduledAt, string Status, int? MaxPlayers, string JoinLink);
 public sealed record ParticipantBatchDto(Guid SessionId, string DisplayName, string? TelegramUsername, string RegistrationStatus);

src/GmRelay.Shared/Rendering/SessionBatchViewBuilder.cs

@@ -38,6 +38,7 @@ public static class SessionBatchViewBuilder
                 session.ScheduledAt,
                 session.Status,
                 session.MaxPlayers,
+                session.JoinLink,
                 activePlayers.Count,
                 activePlayers,
                 waitlistedPlayers,
@@ -57,3 +58,4 @@ public static class SessionBatchViewBuilder
         return $"✋ На {dateTitle}";
     }
 }
+// trigger pr

src/GmRelay.Shared/Rendering/SessionBatchViewModel.cs

@@ -11,6 +11,7 @@ public sealed record SessionViewItem(
     DateTime ScheduledAt,
     string Status,
     int? MaxPlayers,
+    string JoinLink,
     int ActivePlayerCount,
     IReadOnlyList<PlayerViewItem> ActivePlayers,
     IReadOnlyList<PlayerViewItem> WaitlistedPlayers,

src/GmRelay.Shared/packages.lock.json

@@ -0,0 +1,13 @@
+{
+  "version": 1,
+  "dependencies": {
+    "net10.0": {
+      "SecurityCodeScan.VS2019": {
+        "type": "Direct",
+        "requested": "[5.6.7, )",
+        "resolved": "5.6.7",
+        "contentHash": "WIE9RJswdSc2j+rLz2gW6U+gMUjMHzY2j7C/CL8/R2olXNM/+twarfMnWqm+rZodDBvaYDApJyxM8mVYf9FGrQ=="
+      }
+    }
+  }
+}

src/GmRelay.Web/Components/App.razor

@@ -10,7 +10,7 @@
     <ResourcePreloader />
     <link rel="preconnect" href="https://fonts.googleapis.com" />
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
-    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap" rel="stylesheet" />
+    <link href="https://fonts.googleapis.com/css2?family=Cinzel+Decorative:wght@400;700&family=Cinzel:wght@400;600;700&family=Jura:wght@400;500;600;700&display=swap" rel="stylesheet" />
     <link rel="stylesheet" href="@Assets["app.css"]" />
     <link rel="stylesheet" href="@Assets["GmRelay.Web.styles.css"]" />
     <script src="https://telegram.org/js/telegram-web-app.js"></script>

src/GmRelay.Web/Components/Layout/MainLayout.razor.css

@@ -30,8 +30,9 @@
 
 /* === Error UI === */
 #blazor-error-ui {
-    background: var(--bg-secondary);
+    background: var(--status-danger-bg);
-    border-top: 1px solid var(--border-color);
+    color: var(--status-danger);
+    border-top: 1px solid rgba(239, 68, 68, 0.15);
     bottom: 0;
     box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.3);
     box-sizing: border-box;
@@ -41,8 +42,9 @@
     position: fixed;
     width: 100%;
     z-index: 1000;
-    color: var(--text-secondary);
     font-size: 0.875rem;
+    font-family: 'Jura', sans-serif;
+    font-weight: 500;
 }
 
     #blazor-error-ui .reload {

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

@@ -2,10 +2,10 @@
 
 <div class="nav-header">
     <a class="nav-brand" href="">
-        <span class="nav-brand-icon">🎲</span>
+        <img src="logo.png" alt="GM-Relay" class="nav-brand-icon" />
         <span class="nav-brand-text">GM-Relay</span>
     </a>
-    <button class="nav-toggle" @onclick="ToggleMenu" aria-label="Навигационное меню">
+    <button class="nav-toggle" @onclick="ToggleMenu" aria-label="Переключить меню">
         <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
             <line x1="3" y1="6" x2="21" y2="6"/>
             <line x1="3" y1="12" x2="21" y2="12"/>
@@ -23,7 +23,7 @@
                         <path d="M3 9l9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z"/>
                         <polyline points="9 22 9 12 15 12 15 22"/>
                     </svg>
-                    Панель управления
+                    Главная страница
                 </NavLink>
                 <NavLink class="nav-item" href="templates" @onclick="CloseMenu">
                     <svg class="nav-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
@@ -52,11 +52,11 @@
                             <polyline points="16 17 21 12 16 7"/>
                             <line x1="21" y1="12" x2="9" y2="12"/>
                         </svg>
-                        Выйти
+                        Выход
                     </button>
                 </form>
 
-                <div class="nav-version">v1.9.9</div>
+                <div class="nav-version">v2.1.0</div>
             </div>
         </Authorized>
         <NotAuthorized>
@@ -67,7 +67,7 @@
                         <polyline points="10 17 15 12 10 7"/>
                         <line x1="15" y1="12" x2="3" y2="12"/>
                     </svg>
-                    Войти
+                    Вход
                 </NavLink>
             </div>
         </NotAuthorized>

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

@@ -9,23 +9,25 @@
 
 .nav-brand {
     display: flex;
-    align-items: center;
+    align-items: baseline;
-    gap: 0.625rem;
+    gap: 0.75rem;
     text-decoration: none;
     color: var(--text-primary);
 }
 
 .nav-brand-icon {
-    font-size: 1.5rem;
+    width: 1.5rem;
+    height: 1.5rem;
+    object-fit: contain;
+    display: block;
 }
 
 .nav-brand-text {
+    font-family: 'Cinzel Decorative', 'Cinzel', serif;
     font-size: 1.125rem;
     font-weight: 700;
-    background: var(--accent-gradient);
+    letter-spacing: 0.04em;
-    -webkit-background-clip: text;
+    color: var(--text-primary);
-    -webkit-text-fill-color: transparent;
-    background-clip: text;
 }
 
 .nav-toggle {
@@ -84,9 +86,10 @@
 }
 
 .nav-section ::deep .nav-item.active {
-    background: rgba(124, 58, 237, 0.15);
+    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15) 0%, rgba(34, 211, 238, 0.08) 100%);
-    color: var(--accent-primary);
+    color: var(--text-accent);
-    border: 1px solid rgba(124, 58, 237, 0.2);
+    border: 1px solid rgba(139, 92, 246, 0.25);
+    box-shadow: 0 0 12px rgba(139, 92, 246, 0.1);
 }
 
 .nav-icon {
@@ -142,7 +145,7 @@
     border: 1px solid transparent;
     border-radius: var(--radius-sm);
     color: var(--text-muted);
-    font-family: 'Inter', sans-serif;
+    font-family: 'Jura', sans-serif;
     font-size: 0.8125rem;
     cursor: pointer;
     transition: all var(--transition-normal);
@@ -184,9 +187,18 @@
 
     .nav-body.open {
         display: flex;
+        position: fixed;
+        inset: 0;
+        z-index: 200;
+        background: linear-gradient(180deg, #0f1629 0%, #1a0a2e 100%);
+        padding-top: 4.5rem;
+        padding-left: 1rem;
+        padding-right: 1rem;
+        padding-bottom: 1rem;
     }
 
     .nav-header {
+        padding-left: 3.75rem;
         padding-right: 0.75rem;
     }
 }

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

@@ -32,6 +32,7 @@
             </div>
 
             <div style="display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1rem;">
+                <a href="/groupstats/@GroupId" class="btn-gm btn-gm-outline">📊 Статистика</a>
                 @foreach (var manager in groupManagement.Managers)
                 {
                     <span class="status-badge @(manager.Role == GroupManagerRoleExtensions.OwnerValue ? "status-success" : "status-info")">
@@ -251,6 +252,7 @@
                                     <a href="/session/edit/@session.Id" class="btn-gm btn-gm-outline">
                                         ✏️ Изменить
                                     </a>
+                                    <a href="/session/@session.Id/history" class="btn-gm btn-gm-outline">📜 История</a>
                                     @if (CanPromote(session))
                                     {
                                         <button type="button" class="btn-gm btn-gm-success" disabled="@(promotingSessionId == session.Id)" @onclick="() => PromoteWaitlisted(session.Id)">
@@ -338,6 +340,7 @@
                         <a href="/session/edit/@session.Id" class="btn-gm btn-gm-outline" style="flex: 1; justify-content: center; font-size: 0.8125rem; padding: 0.5rem;">
                             ✏️ Изменить
                         </a>
+                        <a href="/session/@session.Id/history" class="btn-gm btn-gm-outline" style="flex: 1; justify-content: center; font-size: 0.8125rem; padding: 0.5rem;">📜 История</a>
                         @if (CanPromote(session))
                         {
                             <button type="button" class="btn-gm btn-gm-success" style="flex: 1; justify-content: center; font-size: 0.8125rem; padding: 0.5rem;" disabled="@(promotingSessionId == session.Id)" @onclick="() => PromoteWaitlisted(session.Id)">

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

@@ -0,0 +1,235 @@
+@page "/group/{GroupId:guid}/stats"
+@using GmRelay.Web.Services
+@using GmRelay.Shared.Domain
+@using Microsoft.AspNetCore.Authorization
+@using Microsoft.AspNetCore.Components.Authorization
+@using System.Security.Claims
+@attribute [Authorize]
+@inject ISessionStore SessionStore
+@inject AuthenticationStateProvider AuthStateProvider
+@inject NavigationManager Navigation
+
+<PageTitle>Статистика — GM-Relay</PageTitle>
+
+<div class="page-container">
+    <ul class="gm-breadcrumb animate-fade-in">
+        <li><a href="/">Главная</a></li>
+        <li><a href="/group/@GroupId">Сессии группы</a></li>
+        <li class="active">Статистика</li>
+    </ul>
+
+    <div class="page-header animate-fade-in">
+        <h2>📊 Статистика посещаемости</h2>
+        <p class="page-subtitle">Надёжность состава и качество расписания</p>
+    </div>
+
+    @if (!string.IsNullOrEmpty(errorMessage))
+    {
+        <div class="gm-alert gm-alert-danger" style="margin-bottom: 1rem;">
+            ⚠️ @errorMessage
+        </div>
+    }
+
+    @if (stats is null)
+    {
+        <div class="loading-spinner">⏳ Загружаем статистику…</div>
+    }
+    else if (stats.Count == 0)
+    {
+        <div class="empty-state">
+            <div class="empty-icon">📈</div>
+            <h3>Пока нет данных</h3>
+            <p>После первых сессий здесь появится аналитика.</p>
+        </div>
+    }
+    else
+    {
+        <div class="glass-card animate-slide-up" style="margin-bottom: 1rem;">
+            <div class="stats-summary" style="display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 1rem; margin-bottom: 1.5rem;">
+                <div class="stat-card">
+                    <div class="stat-value">@stats.Count</div>
+                    <div class="stat-label">Игроков</div>
+                </div>
+                <div class="stat-card">
+                    <div class="stat-value">@TotalSessions</div>
+                    <div class="stat-label">Сессий</div>
+                </div>
+                <div class="stat-card">
+                    <div class="stat-value">@AvgAttendanceRate%</div>
+                    <div class="stat-label">Средняя посещаемость</div>
+                </div>
+                <div class="stat-card">
+                    <div class="stat-value">@topPlayer?.DisplayName</div>
+                    <div class="stat-label">Самый стабильный</div>
+                </div>
+            </div>
+
+            <div class="table-responsive">
+                <table class="gm-table" style="width: 100%;">
+                    <thead>
+                        <tr>
+                            <th @onclick="@(() => SortBy("player"))" style="cursor:pointer;" class="sortable">Игрок  @(sortColumn == "player" ? (sortDesc ? "▼" : "▲") : "")</th>
+                            <th @onclick="@(() => SortBy("total"))" style="cursor:pointer; text-align:center;" class="sortable">Всего  @(sortColumn == "total" ? (sortDesc ? "▼" : "▲") : "")</th>
+                            <th @onclick="@(() => SortBy("confirmed"))" style="cursor:pointer; text-align:center;" class="sortable">✅  @(sortColumn == "confirmed" ? (sortDesc ? "▼" : "▲") : "")</th>
+                            <th @onclick="@(() => SortBy("declined"))" style="cursor:pointer; text-align:center;" class="sortable">❌  @(sortColumn == "declined" ? (sortDesc ? "▼" : "▲") : "")</th>
+                            <th @onclick="@(() => SortBy("noresponse"))" style="cursor:pointer; text-align:center;" class="sortable">💤  @(sortColumn == "noresponse" ? (sortDesc ? "▼" : "▲") : "")</th>
+                            <th @onclick="@(() => SortBy("waitlist"))" style="cursor:pointer; text-align:center;" class="sortable">⏳  @(sortColumn == "waitlist" ? (sortDesc ? "▼" : "▲") : "")</th>
+                            <th @onclick="@(() => SortBy("rate"))" style="cursor:pointer; text-align:center;" class="sortable">%  @(sortColumn == "rate" ? (sortDesc ? "▼" : "▲") : "")</th>
+                            <th @onclick="@(() => SortBy("cancelled"))" style="cursor:pointer; text-align:center;" class="sortable">🚫  @(sortColumn == "cancelled" ? (sortDesc ? "▼" : "▲") : "")</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        @foreach (var s in sortedStats)
+                        {
+                            <tr>
+                                <td>
+                                    <div class="player-info">
+                                        <span class="player-name">@s.DisplayName</span>
+                                        @if (!string.IsNullOrEmpty(s.TelegramUsername))
+                                        {
+                                            <span class="player-username">@@@s.TelegramUsername</span>
+                                        }
+                                    </div>
+                                </td>
+                                <td style="text-align:center;">@s.TotalSessions</td>
+                                <td style="text-align:center;">@s.ConfirmedCount</td>
+                                <td style="text-align:center;">@s.DeclinedCount</td>
+                                <td style="text-align:center;">@s.NoResponseCount</td>
+                                <td style="text-align:center;">@s.WaitlistedCount</td>
+                                <td style="text-align:center;">
+                                    <span class="rate-badge @AttendanceBadgeClass(s.AttendanceRate)">
+                                        @s.AttendanceRate%
+                                    </span>
+                                </td>
+                                <td style="text-align:center;">@s.CancellationAffectedCount</td>
+                            </tr>
+                        }
+                    </tbody>
+                </table>
+            </div>
+        </div>
+    }
+</div>
+
+<style>
+    .stat-card {
+        background: var(--card-bg-secondary, rgba(255,255,255,0.05));
+        border-radius: 0.75rem;
+        padding: 1rem;
+        text-align: center;
+    }
+    .stat-value {
+        font-size: 1.5rem;
+        font-weight: 700;
+        color: var(--accent-color, #7cb97a);
+    }
+    .stat-label {
+        font-size: 0.8rem;
+        color: var(--text-muted, #94a3b8);
+        margin-top: 0.25rem;
+    }
+    .player-info {
+        display: flex;
+        flex-direction: column;
+    }
+    .player-name {
+        font-weight: 500;
+    }
+    .player-username {
+        font-size: 0.8rem;
+        color: var(--text-muted, #94a3b8);
+    }
+    .rate-badge {
+        display: inline-block;
+        padding: 0.25rem 0.5rem;
+        border-radius: 0.5rem;
+        font-weight: 600;
+        font-size: 0.875rem;
+    }
+    .rate-excellent { background: rgba(34,197,94,0.15); color: #22c55e; }
+    .rate-good      { background: rgba(234,179,8,0.15); color: #eab308; }
+    .rate-poor      { background: rgba(239,68,68,0.15); color: #ef4444; }
+</style>
+
+@code {
+    [Parameter] public Guid GroupId { get; set; }
+    private List<PlayerAttendanceStats>? stats;
+    private List<PlayerAttendanceStats> sortedStats = new();
+    private string? errorMessage;
+    private string sortColumn = "confirmed";
+    private bool sortDesc = true;
+    private int TotalSessions => stats?.Count > 0 ? (int)(stats.Max(s => s.TotalSessions)) : 0;
+    private int AvgAttendanceRate => stats?.Count > 0 ? (int)(stats.Average(s => s.AttendanceRate)) : 0;
+    private PlayerAttendanceStats? topPlayer => stats?.OrderByDescending(s => s.AttendanceRate).ThenByDescending(s => s.ConfirmedCount).FirstOrDefault();
+
+    protected override async Task OnInitializedAsync()
+    {
+        var authState = await AuthStateProvider.GetAuthenticationStateAsync();
+        var user = authState.User;
+        if (!user.Identity?.IsAuthenticated ?? true)
+        {
+            Navigation.NavigateTo("/login");
+            return;
+        }
+        var telegramIdClaim = user.FindFirst("telegram_id")?.Value
+            ?? user.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (!long.TryParse(telegramIdClaim, out var telegramId))
+        {
+            Navigation.NavigateTo("/login");
+            return;
+        }
+        try
+        {
+            if (!await SessionStore.IsGroupManagerAsync(GroupId, telegramId))
+            {
+                Navigation.NavigateTo("/access-denied");
+                return;
+            }
+            stats = await SessionStore.GetGroupAttendanceStatsAsync(GroupId) ?? new();
+            UpdateSortedStats();
+        }
+        catch (Exception ex)
+        {
+            errorMessage = $"Ошибка загрузки статистики: {ex.Message}";
+        }
+    }
+
+    private void SortBy(string column)
+    {
+        if (sortColumn == column)
+            sortDesc = !sortDesc;
+        else
+        {
+            sortColumn = column;
+            sortDesc = true;
+        }
+        UpdateSortedStats();
+    }
+
+    private void UpdateSortedStats()
+    {
+        if (stats is null) { sortedStats = new(); return; }
+        IOrderedEnumerable<PlayerAttendanceStats> ordered = sortColumn switch
+        {
+            "player" => sortDesc ? stats.OrderByDescending(s => s.DisplayName) : stats.OrderBy(s => s.DisplayName),
+            "total" => sortDesc ? stats.OrderByDescending(s => s.TotalSessions) : stats.OrderBy(s => s.TotalSessions),
+            "confirmed" => sortDesc ? stats.OrderByDescending(s => s.ConfirmedCount) : stats.OrderBy(s => s.ConfirmedCount),
+            "declined" => sortDesc ? stats.OrderByDescending(s => s.DeclinedCount) : stats.OrderBy(s => s.DeclinedCount),
+            "noresponse" => sortDesc ? stats.OrderByDescending(s => s.NoResponseCount) : stats.OrderBy(s => s.NoResponseCount),
+            "waitlist" => sortDesc ? stats.OrderByDescending(s => s.WaitlistedCount) : stats.OrderBy(s => s.WaitlistedCount),
+            "rate" => sortDesc ? stats.OrderByDescending(s => s.AttendanceRate) : stats.OrderBy(s => s.AttendanceRate),
+            "cancelled" => sortDesc ? stats.OrderByDescending(s => s.CancellationAffectedCount) : stats.OrderBy(s => s.CancellationAffectedCount),
+            _ => stats.OrderByDescending(s => s.ConfirmedCount)
+        };
+        sortedStats = ordered.ToList();
+    }
+
+    private string SortIndicator(string column) => sortColumn == column ? (sortDesc ? "▼" : "▲") : "";
+
+    private string AttendanceBadgeClass(decimal rate) => rate switch
+    {
+        >= 75m => "rate-excellent",
+        >= 50m => "rate-good",
+        _ => "rate-poor"
+    };
+}

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

@@ -8,7 +8,7 @@
 
 <div class="login-page">
     <div class="login-card">
-        <div class="login-logo">🎲</div>
+        <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>
 

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

@@ -8,7 +8,7 @@
 
 <div class="mini-app-page">
     <div class="mini-app-auth-card" data-auth-status="@miniAppAuthStatus">
-        <div class="mini-app-logo">🎲</div>
+        <img src="logo.png" alt="GM-Relay" class="mini-app-logo" />
         <h1>GM-Relay</h1>
         <p>@statusMessage</p>
 

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

@@ -0,0 +1,124 @@
+@page "/session/{SessionId:guid}/history"
+@using GmRelay.Web.Services
+@using Microsoft.AspNetCore.Authorization
+@using Microsoft.AspNetCore.Components.Authorization
+@attribute [Authorize]
+@inject AuthorizedSessionService SessionService
+@inject AuthenticationStateProvider AuthStateProvider
+@inject NavigationManager Navigation
+
+<PageTitle>История изменений — GM-Relay</PageTitle>
+
+<div class="page-container">
+    <ul class="gm-breadcrumb animate-fade-in">
+        <li><a href="/">Главная</a></li>
+        <li><a href="/group/@groupId">Группа</a></li>
+        <li class="active">История изменений</li>
+    </ul>
+
+    <div class="page-header animate-fade-in">
+        <h2>📜 История изменений</h2>
+        @if (sessionTitle is not null)
+        {
+            <p style="color: var(--text-muted); margin-top: 0.25rem;">@sessionTitle</p>
+        }
+    </div>
+
+    @if (entries is null)
+    {
+        <div class="glass-card" style="padding: 2rem;">
+            <div class="skeleton skeleton-text" style="width: 50%; margin-bottom: 1.5rem;"></div>
+            <div class="skeleton skeleton-text" style="width: 100%; height: 2.5rem; margin-bottom: 1.5rem;"></div>
+        </div>
+    }
+    else if (entries.Count == 0)
+    {
+        <div class="glass-card animate-slide-up" style="padding: 2rem; text-align: center;">
+            <p style="color: var(--text-muted);">История изменений пуста. Значимые изменения (время, ссылка, название, участники) будут отображаться здесь.</p>
+        </div>
+    }
+    else
+    {
+        <div class="glass-card animate-slide-up">
+            <div class="table-responsive">
+                <table class="gm-table">
+                    <thead>
+                        <tr>
+                            <th>Время</th>
+                            <th>Актор</th>
+                            <th>Тип изменения</th>
+                            <th>Было</th>
+                            <th>Стало</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        @foreach (var entry in entries)
+                        {
+                            <tr>
+                                <td>@entry.ChangedAt.ToString("dd.MM.yyyy HH:mm") UTC</td>
+                                <td>@entry.ActorName (@entry.ActorTelegramId)</td>
+                                <td>
+                                    <span class="status-badge @(GetBadgeClass(entry.ChangeType))">
+                                        @GetChangeTypeLabel(entry.ChangeType)
+                                    </span>
+                                </td>
+                                <td style="max-width: 200px; overflow-wrap: break-word; color: var(--text-muted);">@(entry.OldValue ?? "—")</td>
+                                <td style="max-width: 200px; overflow-wrap: break-word;">@(entry.NewValue ?? "—")</td>
+                            </tr>
+                        }
+                    </tbody>
+                </table>
+            </div>
+        </div>
+    }
+</div>
+
+@code {
+    [Parameter] public Guid SessionId { get; set; }
+    private List<SessionAuditLogEntry>? entries;
+    private string? sessionTitle;
+    private Guid? groupId;
+
+    protected override async Task OnInitializedAsync()
+    {
+        var authState = await AuthStateProvider.GetAuthenticationStateAsync();
+        if (!authState.User.TryGetTelegramId(out var telegramId))
+        {
+            Navigation.NavigateTo("/access-denied");
+            return;
+        }
+
+        var session = await SessionService.GetSessionForGmAsync(SessionId, telegramId);
+        if (session is null)
+        {
+            Navigation.NavigateTo("/access-denied");
+            return;
+        }
+
+        sessionTitle = session.Title;
+        groupId = session.GroupId;
+        entries = await SessionService.GetSessionHistoryForGmAsync(SessionId, telegramId);
+    }
+
+    private string GetChangeTypeLabel(string changeType) => changeType switch
+    {
+        "Title" => "Название",
+        "Time" => "Время",
+        "Link" => "Ссылка",
+        "MaxPlayers" => "Лимит мест",
+        "Status" => "Статус",
+        "WaitlistPromote" => "Продвижение из листа ожидания",
+        "PlayerRemoved" => "Исключение игрока",
+        "BatchRescheduled" => "Перенос батча",
+        "Cancelled" => "Отмена",
+        _ => changeType
+    };
+
+    private string GetBadgeClass(string changeType) => changeType switch
+    {
+        "Cancelled" or "PlayerRemoved" => "status-danger",
+        "WaitlistPromote" => "status-success",
+        "BatchRescheduled" or "Time" => "status-warning",
+        _ => "status-info"
+    };
+}

src/GmRelay.Web/Dockerfile

@@ -18,8 +18,10 @@ RUN dotnet publish "GmRelay.Web.csproj" -c Release -o /app/publish /p:UseAppHost
 # Stage 2: Runtime
 FROM mcr.microsoft.com/dotnet/aspnet:10.0-noble AS final
 WORKDIR /app
-RUN apt-get update && apt-get install -y libgssapi-krb5-2 && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends libgssapi-krb5-2 wget && rm -rf /var/lib/apt/lists/*
 COPY --from=build /app/publish .
+RUN mkdir -p /app/dataprotection-keys && chown -R $APP_UID:$APP_UID /app/dataprotection-keys
 ENV ASPNETCORE_URLS=http://+:8080
 EXPOSE 8080
+USER $APP_UID
 ENTRYPOINT ["dotnet", "GmRelay.Web.dll"]

src/GmRelay.Web/Health/NpgsqlHealthCheck.cs

@@ -0,0 +1,25 @@
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+using Npgsql;
+
+namespace GmRelay.Web.Health;
+
+public sealed class NpgsqlHealthCheck(NpgsqlDataSource dataSource) : IHealthCheck
+{
+    public async Task<HealthCheckResult> CheckHealthAsync(
+        HealthCheckContext context,
+        CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            await using var connection = await dataSource.OpenConnectionAsync(cancellationToken);
+            await using var command = connection.CreateCommand();
+            command.CommandText = "SELECT 1";
+            await command.ExecuteScalarAsync(cancellationToken);
+            return HealthCheckResult.Healthy();
+        }
+        catch (Exception ex)
+        {
+            return HealthCheckResult.Unhealthy("PostgreSQL is unavailable", ex);
+        }
+    }
+}

src/GmRelay.Web/Program.cs

@@ -1,9 +1,13 @@
 using GmRelay.Web.Components;
+using GmRelay.Web.Health;
 using GmRelay.Web.Services;
 using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.AspNetCore.DataProtection;
+using Microsoft.AspNetCore.Diagnostics.HealthChecks;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
 using System.Security.Claims;
+using System.Text.Json;
 using Telegram.Bot;
 using Npgsql;
 
@@ -12,6 +16,10 @@ var builder = WebApplication.CreateBuilder(args);
 // Add Aspire service defaults
 builder.AddServiceDefaults();
 
+// Add health checks
+builder.Services.AddHealthChecks()
+    .AddCheck<NpgsqlHealthCheck>("npgsql");
+
 // Add Data Protection
 builder.Services.AddDataProtection()
     .PersistKeysToFileSystem(new DirectoryInfo("/app/dataprotection-keys"));
@@ -23,6 +31,7 @@ builder.AddNpgsqlDataSource("gmrelaydb");
 builder.Services.AddSingleton<TelegramAuthService>();
 builder.Services.AddSingleton<ISessionStore, SessionService>();
 builder.Services.AddScoped<AuthorizedSessionService>();
+builder.Services.AddScoped<CalendarSubscriptionService>();
 
 // Add Bot Client
 builder.Services.AddSingleton<ITelegramBotClient>(sp =>
@@ -82,6 +91,26 @@ app.MapStaticAssets();
 app.MapRazorComponents<App>()
     .AddInteractiveServerRenderMode();
 
+// Health check endpoints
+app.MapHealthChecks("/health", new HealthCheckOptions
+{
+    ResponseWriter = async (context, report) =>
+    {
+        context.Response.ContentType = "application/json";
+        var response = new
+        {
+            status = report.Status == HealthStatus.Healthy ? "healthy" : "unhealthy",
+            timestamp = DateTimeOffset.UtcNow.ToString("O")
+        };
+        await context.Response.WriteAsJsonAsync(response);
+    }
+});
+
+app.MapHealthChecks("/alive", new HealthCheckOptions
+{
+    Predicate = r => r.Tags.Contains("live")
+});
+
 // Endpoint to handle Telegram Login callback
 app.MapGet("/auth/telegram", async (HttpContext context, TelegramAuthService authService) =>
 {
@@ -145,6 +174,24 @@ app.MapPost("/auth/logout", async (HttpContext context) =>
     return Results.Redirect("/");
 });
 
+// Public calendar subscription endpoint (no auth required)
+app.MapGet("/calendar/{token}.ics", async (
+    string token,
+    CalendarSubscriptionService service,
+    CancellationToken ct) =>
+{
+    try
+    {
+        var ics = await service.GetIcsAsync(token, ct);
+        var bytes = System.Text.Encoding.UTF8.GetBytes(ics);
+        return Results.File(bytes, "text/calendar", "schedule.ics");
+    }
+    catch (SubscriptionNotFoundException)
+    {
+        return Results.NotFound();
+    }
+});
+
 app.Run();
 
 static ClaimsPrincipal CreateTelegramPrincipal(long telegramId, string name)

src/GmRelay.Web/Services/AuthorizedSessionService.cs

@@ -66,6 +66,15 @@ public sealed class AuthorizedSessionService(ISessionStore sessionStore)
         }
 
         await sessionStore.UpdateSessionAsync(sessionId, session.GroupId, title, scheduledAt, joinLink, maxPlayers);
+
+        if (session.Title != title)
+            await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "Title", session.Title, title);
+        if (session.ScheduledAt != scheduledAt)
+            await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "Time", session.ScheduledAt.ToString("O"), scheduledAt.ToString("O"));
+        if (session.JoinLink != joinLink)
+            await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "Link", session.JoinLink, joinLink);
+        if (session.MaxPlayers != maxPlayers)
+            await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "MaxPlayers", session.MaxPlayers?.ToString(), maxPlayers?.ToString());
     }
 
     public async Task PromoteWaitlistedPlayerForGmAsync(Guid sessionId, long gmId)
@@ -77,6 +86,7 @@ public sealed class AuthorizedSessionService(ISessionStore sessionStore)
         }
 
         await sessionStore.PromoteWaitlistedPlayerAsync(sessionId, session.GroupId);
+        await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "WaitlistPromote", null, null);
     }
 
     public async Task UpdateBatchDetailsForGmAsync(Guid batchId, long gmId, string title, string joinLink)
@@ -115,6 +125,7 @@ public sealed class AuthorizedSessionService(ISessionStore sessionStore)
         }
 
         await sessionStore.RescheduleBatchAsync(batchId, batch.GroupId, firstScheduledAt, intervalDays);
+        await sessionStore.LogSessionChangeAsync(batchId, gmId, "ГМ", "BatchRescheduled", batch.FirstScheduledAt.ToString("O"), firstScheduledAt.ToString("O"));
     }
 
     public async Task<WebSessionBatch> CloneBatchForGmAsync(Guid batchId, long gmId, BatchCloneInterval interval)
@@ -230,6 +241,17 @@ public sealed class AuthorizedSessionService(ISessionStore sessionStore)
         return await sessionStore.GetSessionParticipantsAsync(sessionId);
     }
 
+    public async Task<List<SessionAuditLogEntry>?> GetSessionHistoryForGmAsync(Guid sessionId, long gmId)
+    {
+        var session = await GetSessionForGmAsync(sessionId, gmId);
+        if (session is null)
+        {
+            return null;
+        }
+
+        return await sessionStore.GetSessionHistoryAsync(sessionId);
+    }
+
     public async Task RemovePlayerFromSessionForGmAsync(Guid sessionId, long gmId, Guid participantId)
     {
         var session = await GetSessionForGmAsync(sessionId, gmId);
@@ -239,6 +261,7 @@ public sealed class AuthorizedSessionService(ISessionStore sessionStore)
         }
 
         await sessionStore.RemovePlayerFromSessionAsync(sessionId, session.GroupId, participantId);
+        await sessionStore.LogSessionChangeAsync(sessionId, gmId, "ГМ", "PlayerRemoved", participantId.ToString(), null);
     }
 
     private async Task<bool> GroupBelongsToGmAsync(Guid groupId, long gmId)

src/GmRelay.Web/Services/CalendarSubscriptionService.cs

@@ -0,0 +1,93 @@
+using System.Text;
+using Dapper;
+using GmRelay.Shared.Domain;
+using Npgsql;
+
+namespace GmRelay.Web.Services;
+
+public sealed class CalendarSubscriptionService(NpgsqlDataSource dataSource)
+{
+    private const string IcsProdId = "-//GM-Relay//TTRPG Schedule//EN";
+
+    public string GenerateToken() => Guid.NewGuid().ToString("N");
+
+    public async Task<string> CreateSubscriptionAsync(
+        long userTelegramId,
+        Guid? groupId,
+        CalendarSubscriptionFilter filter,
+        CancellationToken ct = default)
+    {
+        var token = GenerateToken();
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+        await connection.ExecuteAsync(
+            @"INSERT INTO calendar_subscriptions (id, token, user_telegram_id, group_id, filter_type, created_at, expires_at)
+              VALUES (gen_random_uuid(), @token, @userTelegramId, @groupId, @filterType, now(), NULL)",
+            new { token, userTelegramId, groupId, filterType = (int)filter });
+        return token;
+    }
+
+    public async Task<string> GetIcsAsync(string token, CancellationToken ct = default)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+
+        var subscription = await connection.QueryFirstOrDefaultAsync<SubscriptionRecord>(
+            @"SELECT id, user_telegram_id as UserTelegramId, group_id as GroupId, filter_type as FilterType
+              FROM calendar_subscriptions
+              WHERE token = @token
+                AND (expires_at IS NULL OR expires_at > now())",
+            new { token });
+
+        if (subscription is null)
+            throw new SubscriptionNotFoundException();
+
+        var sessions = await connection.QueryAsync<CalendarSessionDto>(
+            subscription.FilterType == (int)CalendarSubscriptionFilter.SpecificGroup && subscription.GroupId.HasValue
+                ? @"SELECT s.id as Id, s.title as Title, s.scheduled_at as ScheduledAt
+                    FROM sessions s
+                    WHERE s.group_id = @GroupId
+                      AND s.status = @Planned
+                      AND s.scheduled_at > NOW()
+                    ORDER BY s.scheduled_at ASC"
+                : @"SELECT s.id as Id, s.title as Title, s.scheduled_at as ScheduledAt
+                    FROM sessions s
+                    WHERE s.status = @Planned
+                      AND s.scheduled_at > NOW()
+                    ORDER BY s.scheduled_at ASC",
+            new { subscription.GroupId, Planned = SessionStatus.Planned });
+
+        var sb = new StringBuilder();
+        sb.AppendLine("BEGIN:VCALENDAR");
+        sb.AppendLine("VERSION:2.0");
+        sb.AppendLine($"PRODID:{IcsProdId}");
+        sb.AppendLine("CALSCALE:GREGORIAN");
+        sb.AppendLine("METHOD:PUBLISH");
+
+        foreach (var s in sessions)
+        {
+            var dtStart = FormatIcsDate(s.ScheduledAt);
+            var dtEnd = FormatIcsDate(s.ScheduledAt.AddHours(4));
+            sb.AppendLine("BEGIN:VEVENT");
+            sb.AppendLine($"UID:{s.Id}@gmrelay");
+            sb.AppendLine($"DTSTAMP:{FormatIcsDate(DateTime.UtcNow)}");
+            sb.AppendLine($"DTSTART:{dtStart}");
+            sb.AppendLine($"DTEND:{dtEnd}");
+            sb.AppendLine($"SUMMARY:{EscapeIcsText(s.Title)}");
+            sb.AppendLine("END:VEVENT");
+        }
+
+        sb.AppendLine("END:VCALENDAR");
+        return sb.ToString();
+    }
+
+    private static string FormatIcsDate(DateTime dt) => dt.ToUniversalTime().ToString("yyyyMMddTHHmmssZ");
+
+    private static string EscapeIcsText(string text) => text
+        .Replace("\\", "\\\\")
+        .Replace(";", "\\;")
+        .Replace(",", "\\,")
+        .Replace("\n", "\\n")
+        .Replace("\r", "");
+
+    private sealed record SubscriptionRecord(Guid Id, long UserTelegramId, Guid? GroupId, int FilterType);
+    private sealed record CalendarSessionDto(Guid Id, string Title, DateTime ScheduledAt);
+}

src/GmRelay.Web/Services/ISessionStore.cs

@@ -2,6 +2,30 @@ using GmRelay.Shared.Domain;
 
 namespace GmRelay.Web.Services;
 
+public sealed record PlayerAttendanceStats(
+    Guid PlayerId,
+    string DisplayName,
+    string? TelegramUsername,
+    long TotalSessions,
+    long ConfirmedCount,
+    long DeclinedCount,
+    long NoResponseCount,
+    long WaitlistedCount,
+    long CancellationAffectedCount,
+    decimal AttendanceRate
+);
+
+public sealed record SessionAuditLogEntry(
+    Guid Id,
+    Guid SessionId,
+    long ActorTelegramId,
+    string ActorName,
+    string ChangeType,
+    string? OldValue,
+    string? NewValue,
+    DateTime ChangedAt
+);
+
 public interface ISessionStore
 {
     Task<List<WebGameGroup>> GetGroupsForGmAsync(long gmId);
@@ -27,4 +51,7 @@ public interface ISessionStore
     Task RemoveGroupCoGmAsync(Guid groupId, long coGmTelegramId);
     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<List<SessionAuditLogEntry>> GetSessionHistoryAsync(Guid sessionId);
 }

src/GmRelay.Web/Services/SessionService.cs

@@ -38,7 +38,8 @@ public sealed record WebSession(
     int? MaxPlayers,
     int ActivePlayerCount,
     int WaitlistedPlayerCount,
-    string NotificationMode = SessionNotificationModeExtensions.GroupAndDirectValue);
+    string NotificationMode = SessionNotificationModeExtensions.GroupAndDirectValue,
+    int? ThreadId = null);
 
 public sealed record WebParticipant(
     Guid Id,
@@ -73,7 +74,8 @@ internal sealed record WebBatchSessionRow(
     int? BatchMessageId,
     long TelegramChatId,
     int? ThreadId,
-    string NotificationMode);
+    string NotificationMode,
+    bool TopicCreatedByBot = false);
 internal sealed record WebTemplateGroupDto(long TelegramChatId);
 
 public sealed class SessionService(
@@ -169,6 +171,65 @@ public sealed class SessionService(
             new { GroupId = groupId, OwnerRole = GroupManagerRoleExtensions.OwnerValue })).ToList();
     }
 
+    public async Task<List<PlayerAttendanceStats>> GetGroupAttendanceStatsAsync(Guid groupId)
+    {
+        await using var conn = await dataSource.OpenConnectionAsync();
+        return (await conn.QueryAsync<PlayerAttendanceStats>(
+            """
+            SELECT
+                p.id AS PlayerId,
+                p.display_name AS DisplayName,
+                p.telegram_username AS TelegramUsername,
+                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,
+                COUNT(DISTINCT CASE WHEN sp.rsvp_status = 'Pending' THEN s.id END) AS NoResponseCount,
+                COUNT(DISTINCT CASE WHEN sp.registration_status = 'Waitlisted' THEN s.id END) AS WaitlistedCount,
+                COUNT(DISTINCT CASE WHEN s.status = 'Cancelled' AND sp.rsvp_status IN ('Confirmed','Declined') THEN s.id END) AS CancellationAffectedCount,
+                CASE WHEN COUNT(DISTINCT s.id) > 0
+                    THEN ROUND(
+                        COUNT(DISTINCT CASE WHEN sp.rsvp_status = 'Confirmed' THEN s.id END)
+                        * 100.0 / COUNT(DISTINCT s.id), 2)
+                    ELSE 0
+                END AS AttendanceRate
+            FROM players p
+            JOIN session_participants sp ON sp.player_id = p.id
+            JOIN sessions s ON s.id = sp.session_id
+            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
+            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)
+    {
+        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)
+            VALUES (@SessionId, @ActorTelegramId, @ActorName, @ChangeType, @OldValue, @NewValue)
+            """,
+            new { SessionId = sessionId, ActorTelegramId = actorTelegramId, ActorName = actorName, ChangeType = changeType, OldValue = oldValue, NewValue = newValue });
+    }
+
+    public async Task<List<SessionAuditLogEntry>> GetSessionHistoryAsync(Guid sessionId)
+    {
+        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,
+                   change_type AS ChangeType, old_value AS OldValue, new_value AS NewValue, changed_at AS ChangedAt
+            FROM session_audit_log
+            WHERE session_id = @SessionId
+            ORDER BY changed_at DESC
+            """,
+            new { SessionId = sessionId });
+        return entries.ToList();
+    }
+
     public async Task AddGroupCoGmAsync(
         Guid groupId,
         long ownerTelegramId,
@@ -181,11 +242,14 @@ public sealed class SessionService(
 
         await conn.ExecuteAsync(
             """
-            INSERT INTO players (telegram_id, display_name, telegram_username)
+            INSERT INTO players (telegram_id, display_name, telegram_username, platform, external_user_id, external_username)
-            VALUES (@TelegramId, @DisplayName, @TelegramUsername)
+            VALUES (@TelegramId, @DisplayName, @TelegramUsername, 'Telegram', @TelegramId::TEXT, @TelegramUsername)
             ON CONFLICT (telegram_id) DO UPDATE
             SET display_name = EXCLUDED.display_name,
-                telegram_username = EXCLUDED.telegram_username
+                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
             {
@@ -255,7 +319,8 @@ public sealed class SessionService(
                      s.max_players AS MaxPlayers,
                      COALESCE(active_counts.count, 0)::int AS ActivePlayerCount,
                      COALESCE(waitlist_counts.count, 0)::int AS WaitlistedPlayerCount,
-                     s.notification_mode AS NotificationMode
+                     s.notification_mode AS NotificationMode,
+                     s.thread_id AS ThreadId
               FROM sessions s
               JOIN game_groups g ON g.id = s.group_id
               LEFT JOIN LATERAL (
@@ -292,7 +357,8 @@ public sealed class SessionService(
                      s.max_players AS MaxPlayers,
                      COALESCE(active_counts.count, 0)::int AS ActivePlayerCount,
                      COALESCE(waitlist_counts.count, 0)::int AS WaitlistedPlayerCount,
-                     s.notification_mode AS NotificationMode
+                     s.notification_mode AS NotificationMode,
+                     s.thread_id AS ThreadId
               FROM sessions s
               JOIN game_groups g ON g.id = s.group_id
               LEFT JOIN LATERAL (
@@ -350,7 +416,8 @@ public sealed class SessionService(
                      s.max_players AS MaxPlayers,
                      0 AS ActivePlayerCount,
                      0 AS WaitlistedPlayerCount,
-                     s.notification_mode AS NotificationMode
+                     s.notification_mode AS NotificationMode,
+                     s.thread_id AS ThreadId
               FROM sessions s
               JOIN game_groups g ON g.id = s.group_id
               WHERE s.id = @Id AND s.group_id = @GroupId",
@@ -404,7 +471,11 @@ public sealed class SessionService(
                            "\n" +
                            $"👥 Мест: <b>{(maxPlayers.HasValue ? maxPlayers.Value.ToString(System.Globalization.CultureInfo.InvariantCulture) : "без лимита")}</b>";
 
-        await bot.SendMessage(oldSession.TelegramChatId, notification, parseMode: Telegram.Bot.Types.Enums.ParseMode.Html);
+        await bot.SendMessage(
+            chatId: oldSession.TelegramChatId,
+            messageThreadId: oldSession.ThreadId,
+            text: notification,
+            parseMode: Telegram.Bot.Types.Enums.ParseMode.Html);
 
         var mode = SessionNotificationModeExtensions.FromDatabaseValue(oldSession.NotificationMode);
         if (mode.ShouldSendDirectMessages())
@@ -431,7 +502,8 @@ public sealed class SessionService(
                      s.max_players AS MaxPlayers,
                      0 AS ActivePlayerCount,
                      0 AS WaitlistedPlayerCount,
-                     s.notification_mode AS NotificationMode
+                     s.notification_mode AS NotificationMode,
+                     s.thread_id AS ThreadId
               FROM sessions s
               JOIN game_groups g ON g.id = s.group_id
               WHERE s.id = @SessionId AND s.group_id = @GroupId
@@ -508,8 +580,9 @@ public sealed class SessionService(
         await transaction.CommitAsync();
 
         await bot.SendMessage(
-            session.TelegramChatId,
+            chatId: session.TelegramChatId,
-            $"⬆️ <b>{System.Net.WebUtility.HtmlEncode(promoted.DisplayName)}</b> переведен(а) из листа ожидания в основной состав «{System.Net.WebUtility.HtmlEncode(session.Title)}».",
+            messageThreadId: session.ThreadId,
+            text: $"⬆️ <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)
@@ -553,7 +626,8 @@ public sealed class SessionService(
                      s.max_players AS MaxPlayers,
                      0 AS ActivePlayerCount,
                      0 AS WaitlistedPlayerCount,
-                     s.notification_mode AS NotificationMode
+                     s.notification_mode AS NotificationMode,
+                     s.thread_id AS ThreadId
               FROM sessions s
               JOIN game_groups g ON g.id = s.group_id
               WHERE s.id = @SessionId AND s.group_id = @GroupId
@@ -638,15 +712,17 @@ public sealed class SessionService(
         await transaction.CommitAsync();
 
         await bot.SendMessage(
-            session.TelegramChatId,
+            chatId: session.TelegramChatId,
-            $"🚪 <b>{System.Net.WebUtility.HtmlEncode(participant.DisplayName)}</b> удален(а) из сессии «{System.Net.WebUtility.HtmlEncode(session.Title)}».",
+            messageThreadId: session.ThreadId,
+            text: $"🚪 <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,
+                chatId: session.TelegramChatId,
-                $"⬆️ <b>{System.Net.WebUtility.HtmlEncode(promoted.DisplayName)}</b> переведен(а) из листа ожидания в основной состав «{System.Net.WebUtility.HtmlEncode(session.Title)}».",
+                messageThreadId: session.ThreadId,
+                text: $"⬆️ <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)
@@ -754,6 +830,7 @@ public sealed class SessionService(
                    s.batch_message_id AS BatchMessageId,
                    g.telegram_chat_id AS TelegramChatId,
                    s.thread_id AS ThreadId,
+                   s.topic_created_by_bot AS TopicCreatedByBot,
                    s.notification_mode AS NotificationMode
             FROM sessions s
             JOIN game_groups g ON g.id = s.group_id
@@ -806,7 +883,11 @@ public sealed class SessionService(
                            $"🗓 Новое начало: <b>{firstScheduledAt.FormatMoscow()}</b> (МСК)\n" +
                            $"↔️ Шаг: <b>{intervalDays} дн.</b>";
 
-        await bot.SendMessage(firstSession.TelegramChatId, notification, parseMode: Telegram.Bot.Types.Enums.ParseMode.Html);
+        await bot.SendMessage(
+            chatId: firstSession.TelegramChatId,
+            messageThreadId: firstSession.ThreadId,
+            text: notification,
+            parseMode: Telegram.Bot.Types.Enums.ParseMode.Html);
 
         var mode = SessionNotificationModeExtensions.FromDatabaseValue(firstSession.NotificationMode);
         if (mode.ShouldSendDirectMessages())
@@ -833,6 +914,7 @@ public sealed class SessionService(
                    s.batch_message_id AS BatchMessageId,
                    g.telegram_chat_id AS TelegramChatId,
                    s.thread_id AS ThreadId,
+                   s.topic_created_by_bot AS TopicCreatedByBot,
                    s.notification_mode AS NotificationMode
             FROM sessions s
             JOIN game_groups g ON g.id = s.group_id
@@ -861,8 +943,8 @@ public sealed class SessionService(
             var scheduledAt = BatchSchedulePlanner.ShiftForClone(sourceSession.ScheduledAt, interval);
             var sessionId = await conn.ExecuteScalarAsync<Guid>(
                 """
-                INSERT INTO sessions (batch_id, group_id, title, join_link, scheduled_at, status, thread_id, max_players, notification_mode)
+                INSERT INTO sessions (batch_id, group_id, title, join_link, scheduled_at, status, thread_id, topic_created_by_bot, max_players, notification_mode)
-                VALUES (@BatchId, @GroupId, @Title, @JoinLink, @ScheduledAt, @Status, @ThreadId, @MaxPlayers, @NotificationMode)
+                VALUES (@BatchId, @GroupId, @Title, @JoinLink, @ScheduledAt, @Status, @ThreadId, @TopicCreatedByBot, @MaxPlayers, @NotificationMode)
                 RETURNING id
                 """,
                 new
@@ -874,12 +956,13 @@ public sealed class SessionService(
                     ScheduledAt = scheduledAt,
                     Status = SessionStatus.Planned,
                     ThreadId = threadId,
+                    sourceSession.TopicCreatedByBot,
                     sourceSession.MaxPlayers,
                     sourceSession.NotificationMode
                 },
                 transaction);
 
-            renderedSessions.Add(new SessionBatchDto(sessionId, scheduledAt, SessionStatus.Planned, sourceSession.MaxPlayers));
+            renderedSessions.Add(new SessionBatchDto(sessionId, scheduledAt, SessionStatus.Planned, sourceSession.MaxPlayers, batchJoinLink));
         }
 
         await transaction.CommitAsync();
@@ -1088,7 +1171,7 @@ public sealed class SessionService(
                 },
                 transaction);
 
-            renderedSessions.Add(new SessionBatchDto(sessionId, scheduledAt, SessionStatus.Planned, template.MaxPlayers));
+            renderedSessions.Add(new SessionBatchDto(sessionId, scheduledAt, SessionStatus.Planned, template.MaxPlayers, template.JoinLink));
         }
 
         await transaction.CommitAsync();
@@ -1186,7 +1269,7 @@ public sealed class SessionService(
             await using var conn = await dataSource.OpenConnectionAsync();
 
             var sessions = (await conn.QueryAsync<SessionBatchDto>(
-                "SELECT id AS SessionId, scheduled_at AS ScheduledAt, status AS Status, max_players AS MaxPlayers FROM sessions WHERE batch_id = @BatchId ORDER BY scheduled_at",
+                "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 { BatchId = batchId })).ToList();
 
             var participants = (await conn.QueryAsync<ParticipantBatchDto>(

src/GmRelay.Web/Services/SubscriptionNotFoundException.cs

@@ -0,0 +1,6 @@
+namespace GmRelay.Web.Services;
+
+public sealed class SubscriptionNotFoundException : Exception
+{
+    public SubscriptionNotFoundException() : base("Calendar subscription not found.") { }
+}

src/GmRelay.Web/Services/TelegramSessionBatchRenderer.cs

@@ -1,3 +1,4 @@
+using GmRelay.Shared.Domain;
 using GmRelay.Shared.Rendering;
 using Telegram.Bot.Types.ReplyMarkups;
 
@@ -19,6 +20,11 @@ public static class TelegramSessionBatchRenderer
                 ? $"👥 Места: {session.ActivePlayerCount}/{session.MaxPlayers.Value}\n"
                 : $"👥 Игроки ({session.ActivePlayerCount}):\n";
 
+            if (!string.IsNullOrEmpty(session.JoinLink))
+            {
+                messageText += $"🔗 <a href=\"{System.Net.WebUtility.HtmlEncode(session.JoinLink)}\">Ссылка на игру</a>\n";
+            }
+
             if (session.ActivePlayers.Count > 0)
             {
                 messageText += string.Join("\n", session.ActivePlayers.Select(p =>

src/GmRelay.Web/packages.lock.json

@@ -0,0 +1,250 @@
+{
+  "version": 1,
+  "dependencies": {
+    "net10.0": {
+      "Aspire.Npgsql": {
+        "type": "Direct",
+        "requested": "[13.2.2, )",
+        "resolved": "13.2.2",
+        "contentHash": "nEYgziWN7hksgEQEWy24JypcMCU8gKYcIIyPL05JfdXxUWuPRLotH/KOeuHevAjSEOYkL3dtGakBkJAuPobGmA==",
+        "dependencies": {
+          "AspNetCore.HealthChecks.NpgSql": "9.0.0",
+          "Npgsql.DependencyInjection": "10.0.1",
+          "Npgsql.OpenTelemetry": "10.0.1",
+          "OpenTelemetry.Extensions.Hosting": "1.15.0"
+        }
+      },
+      "Dapper": {
+        "type": "Direct",
+        "requested": "[2.1.72, )",
+        "resolved": "2.1.72",
+        "contentHash": "ns4mGqQd9a/MhP8m6w556vVlZIa0/MfUu03zrxjZC/jlr1uVCsUac8bkdB+Fs98Llbd56rRSo1eZH5VVmeGZyw=="
+      },
+      "Microsoft.AspNetCore.App.Internal.Assets": {
+        "type": "Direct",
+        "requested": "[10.0.5, )",
+        "resolved": "10.0.5",
+        "contentHash": "Oxw9Ps1/nd6c/EMCAI13AeJFEqXezAvCEOshMjUWmL7LeGirHJNzytR2e/3jINYg0j2TmPvNUowGHf+gp8zDSQ=="
+      },
+      "Npgsql": {
+        "type": "Direct",
+        "requested": "[10.0.2, )",
+        "resolved": "10.0.2",
+        "contentHash": "q5RfBI+wywJSFUNDE1L4ZbHEHCFTblo8Uf6A6oe4feOUFYiUQXyAf9GBh5qEZpvJaHiEbpBPkQumjEhXCJxdrg=="
+      },
+      "SecurityCodeScan.VS2019": {
+        "type": "Direct",
+        "requested": "[5.6.7, )",
+        "resolved": "5.6.7",
+        "contentHash": "WIE9RJswdSc2j+rLz2gW6U+gMUjMHzY2j7C/CL8/R2olXNM/+twarfMnWqm+rZodDBvaYDApJyxM8mVYf9FGrQ=="
+      },
+      "Telegram.Bot": {
+        "type": "Direct",
+        "requested": "[22.9.6.1, )",
+        "resolved": "22.9.6.1",
+        "contentHash": "I0eaMaETcWIhMn4uu4RGd9e6PLJOjaOG3QAcKPsTcS80H3TF6gqj3UF9NKu4ZY90ul6Y6NiWToHkg/PsvxkotA=="
+      },
+      "AspNetCore.HealthChecks.NpgSql": {
+        "type": "Transitive",
+        "resolved": "9.0.0",
+        "contentHash": "npc58/AD5zuVxERdhCl2Kb7WnL37mwX42SJcXIwvmEig0/dugOLg3SIwtfvvh3TnvTwR/sk5LYNkkPaBdks61A==",
+        "dependencies": {
+          "Npgsql": "8.0.3"
+        }
+      },
+      "Microsoft.Extensions.AmbientMetadata.Application": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "CNrEjaOCZ8d1HtB0mvpiX4EWxLkee2xy+CsYXxmsEYJSFgw3OmF9pIhP/tCTeYBHhpsKJj5wM63G8IBFGxAcsw=="
+      },
+      "Microsoft.Extensions.Compliance.Abstractions": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "1a4xDAT6fRyP8t419q3WvWMmMslDTvI7OAZLWBhn5rysFG0bl5xFenTswd1xAbT/3u3mx4Xyb5bPx+V+18tJeQ=="
+      },
+      "Microsoft.Extensions.DependencyInjection.AutoActivation": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "Z/OI261l7LnxyODKPx0trQyIHFyicCR/akfn64lGOjPcf4FpAZ7ePAGl2HPvQBUBSNfPTF0gWeCfuFmyftMgYA=="
+      },
+      "Microsoft.Extensions.Diagnostics.ExceptionSummarization": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "3qMK1D40D10kb5TdBtFJpzz6/WH0NinWs68ZZS8jCFgHMXDiOjGiPOneMmIocCP/wnUUW4Hzf8lMsIE1xIGxDA=="
+      },
+      "Microsoft.Extensions.Http.Diagnostics": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "I0FBgF6yZRwYH9E3KQ2vHm80YZ7YBj+52GDsmOWXPBv/p15b/wUoNupV9kw3LnSNVsWMqlGbiuZgBnHpMwPh+Q==",
+        "dependencies": {
+          "Microsoft.Extensions.Telemetry": "10.2.0"
+        }
+      },
+      "Microsoft.Extensions.Http.Resilience": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "Lg+OjBW+ODDbM4Ax4LoERvQ1dqSZ8I2gQc2+B0/WOWl2+PunLJ3xb3x8MtHGfcb/Mp98RoMpwRKm6Aj9mzXwrA==",
+        "dependencies": {
+          "Microsoft.Extensions.Http.Diagnostics": "10.2.0",
+          "Microsoft.Extensions.Resilience": "10.2.0"
+        }
+      },
+      "Microsoft.Extensions.Resilience": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "v4WOdAOFxB3AcsUkZWNcHL3mYzs4KAPtHO8rkoQlFKOBoD3KyjjAL+h3tRwSK5i4UpF/yhxsQRY0JxKj4osxxw==",
+        "dependencies": {
+          "Microsoft.Extensions.Diagnostics.ExceptionSummarization": "10.2.0",
+          "Microsoft.Extensions.Telemetry.Abstractions": "10.2.0",
+          "Polly.Extensions": "8.4.2",
+          "Polly.RateLimiting": "8.4.2"
+        }
+      },
+      "Microsoft.Extensions.ServiceDiscovery": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "AHTPfiKodj66xA8RwRkFD4q11V2AvzcuDsujv6ViPkOPtvBEYcPVplHakK56pPzWlX08MDS+TAQXfFXAeP7J5w==",
+        "dependencies": {
+          "Microsoft.Extensions.ServiceDiscovery.Abstractions": "10.2.0"
+        }
+      },
+      "Microsoft.Extensions.ServiceDiscovery.Abstractions": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "sANlOvfqfw/yfych4CLlHSKSWzIie6mQG7w83gVur1foNOafyHxcgpoQMvBf+KiB4Tpls6P1/Z77IIQSK8hxFg=="
+      },
+      "Microsoft.Extensions.Telemetry": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "ssW5gosYlewNH/ISTyaLD/XfJT4GSjwShOUKv61fpXrqVmHkhuIA/5bBAGStM1XbzJjt9IG2vzfdHTu4zlX9Ew==",
+        "dependencies": {
+          "Microsoft.Extensions.AmbientMetadata.Application": "10.2.0",
+          "Microsoft.Extensions.DependencyInjection.AutoActivation": "10.2.0",
+          "Microsoft.Extensions.Telemetry.Abstractions": "10.2.0"
+        }
+      },
+      "Microsoft.Extensions.Telemetry.Abstractions": {
+        "type": "Transitive",
+        "resolved": "10.2.0",
+        "contentHash": "6V4V6NX6RLUYWwV89DeW/4zK5xOycYHWhsfMXSpKVGgMHfXcczmbk6hBeqTnRPzhpATYcOWlmA6hk1jgdxUugA==",
+        "dependencies": {
+          "Microsoft.Extensions.Compliance.Abstractions": "10.2.0"
+        }
+      },
+      "Npgsql.DependencyInjection": {
+        "type": "Transitive",
+        "resolved": "10.0.1",
+        "contentHash": "YHFa4vD27sNIfv6s5q8Zi1fLvKfmK1xcpMv0PUvXOxDFbRmuMRSHwpZTbPvsAlj97q1/o7DfyynLqfqrCm1VnA==",
+        "dependencies": {
+          "Npgsql": "10.0.1"
+        }
+      },
+      "Npgsql.OpenTelemetry": {
+        "type": "Transitive",
+        "resolved": "10.0.1",
+        "contentHash": "G9fEIBaHggZXWfDSDnKLc0XwKcbuU6i2eXp7zDqpgYxbhCmIN9fRgaSOGyyMNHSo/yY1IB4G4CjW5VO/SKRR0g==",
+        "dependencies": {
+          "Npgsql": "10.0.1",
+          "OpenTelemetry.API": "1.14.0"
+        }
+      },
+      "OpenTelemetry": {
+        "type": "Transitive",
+        "resolved": "1.15.3",
+        "contentHash": "N0i6WjPoHPbZyms1ugbDIFAJFuGlpeExJMU/+XSL0lQRUkg/D0utFkDoLXf8Z1km5B+xVZ2GyMXXiX8qdeNmPg==",
+        "dependencies": {
+          "OpenTelemetry.Api.ProviderBuilderExtensions": "1.15.3"
+        }
+      },
+      "OpenTelemetry.Api": {
+        "type": "Transitive",
+        "resolved": "1.15.3",
+        "contentHash": "fX+fkCysfPut+qCcT3bKqyX4QN9Saf4CgX8HLOHywEVD+Xr7sULtfuypITpoDysjx8R59dn/3mWhgimMH8cm/g=="
+      },
+      "OpenTelemetry.Api.ProviderBuilderExtensions": {
+        "type": "Transitive",
+        "resolved": "1.15.3",
+        "contentHash": "SYn0lqYDwLMWhv/zlNGsQcl2yX++yTumanX46bmOZE/ZDOd1WjPBO2kZaZgKLEZTZk48pavIFGJ6vOvxXgWVFQ==",
+        "dependencies": {
+          "OpenTelemetry.Api": "1.15.3"
+        }
+      },
+      "OpenTelemetry.Exporter.OpenTelemetryProtocol": {
+        "type": "Transitive",
+        "resolved": "1.15.3",
+        "contentHash": "FEXJepcseTGbATiCkUfP7ipoFEYYfl/0UmmUwi0KxCPg9PaUA8ab2P1LGopK+/HExasJ1ZutFhZrN6WvUIR23g==",
+        "dependencies": {
+          "OpenTelemetry": "1.15.3"
+        }
+      },
+      "OpenTelemetry.Extensions.Hosting": {
+        "type": "Transitive",
+        "resolved": "1.15.3",
+        "contentHash": "u8n/W8yIlqv0BXZmvId1iVaeWXG42tGKdTkuLYg5g57Y/r9CeUNzqtrSHNdG5IoO8iPX79w3v+WsbAHgUQbfeg==",
+        "dependencies": {
+          "OpenTelemetry": "1.15.3"
+        }
+      },
+      "OpenTelemetry.Instrumentation.AspNetCore": {
+        "type": "Transitive",
+        "resolved": "1.15.2",
+        "contentHash": "2nPd7r0ug/gd6/CNFL6Rlu+RSQ9WYGSGHAYQ1ssbSqyzKJpqTunfx2I/1O0WB5k+L0cyXbG4XVZpoSoUc3M7wg==",
+        "dependencies": {
+          "OpenTelemetry.Api.ProviderBuilderExtensions": "[1.15.3, 2.0.0)"
+        }
+      },
+      "OpenTelemetry.Instrumentation.Http": {
+        "type": "Transitive",
+        "resolved": "1.15.1",
+        "contentHash": "vFO4Fj/dXkoVNGo/nhoGpO2zYQmZwr4jTID7oRGo+XlQ8LqksyZjUXQ4p39RfUvTID7IzzL8Qe71tW7CcAFymA==",
+        "dependencies": {
+          "OpenTelemetry.Api.ProviderBuilderExtensions": "[1.15.3, 2.0.0)"
+        }
+      },
+      "OpenTelemetry.Instrumentation.Runtime": {
+        "type": "Transitive",
+        "resolved": "1.15.1",
+        "contentHash": "cpPwlUT5HXcLGPaIgsbSy0W9eFYAPGVbTP1p8/uyQ4Osvf5BJuPpEXE7crL09SmEd44r0DGNKDtsqxaAz0HxQw==",
+        "dependencies": {
+          "OpenTelemetry.Api": "[1.15.3, 2.0.0)"
+        }
+      },
+      "Polly.Core": {
+        "type": "Transitive",
+        "resolved": "8.4.2",
+        "contentHash": "BpE2I6HBYYA5tF0Vn4eoQOGYTYIK1BlF5EXVgkWGn3mqUUjbXAr13J6fZVbp7Q3epRR8yshacBMlsHMhpOiV3g=="
+      },
+      "Polly.Extensions": {
+        "type": "Transitive",
+        "resolved": "8.4.2",
+        "contentHash": "GZ9vRVmR0jV2JtZavt+pGUsQ1O1cuRKG7R7VOZI6ZDy9y6RNPvRvXK1tuS4ffUrv8L0FTea59oEuQzgS0R7zSA==",
+        "dependencies": {
+          "Polly.Core": "8.4.2"
+        }
+      },
+      "Polly.RateLimiting": {
+        "type": "Transitive",
+        "resolved": "8.4.2",
+        "contentHash": "ehTImQ/eUyO07VYW2WvwSmU9rRH200SKJ/3jku9rOkyWE0A2JxNFmAVms8dSn49QLSjmjFRRSgfNyOgr/2PSmA==",
+        "dependencies": {
+          "Polly.Core": "8.4.2"
+        }
+      },
+      "gmrelay.servicedefaults": {
+        "type": "Project",
+        "dependencies": {
+          "Microsoft.Extensions.Http.Resilience": "[10.2.0, )",
+          "Microsoft.Extensions.ServiceDiscovery": "[10.2.0, )",
+          "OpenTelemetry.Exporter.OpenTelemetryProtocol": "[1.15.3, )",
+          "OpenTelemetry.Extensions.Hosting": "[1.15.3, )",
+          "OpenTelemetry.Instrumentation.AspNetCore": "[1.15.2, )",
+          "OpenTelemetry.Instrumentation.Http": "[1.15.1, )",
+          "OpenTelemetry.Instrumentation.Runtime": "[1.15.1, )"
+        }
+      },
+      "gmrelay.shared": {
+        "type": "Project"
+      }
+    }
+  }
+}

tests/GmRelay.Bot.Tests/Features/Landing/TelegramLandingPromisesSmokeTests.cs

@@ -147,6 +147,7 @@ public sealed class TelegramLandingPromisesSmokeTests
             string title,
             IReadOnlyList<DateTimeOffset> scheduledTimes,
             int? maxPlayers,
+            string joinLink,
             SessionNotificationMode notificationMode)
         {
             Title = title;
@@ -156,7 +157,8 @@ public sealed class TelegramLandingPromisesSmokeTests
                     Guid.NewGuid(),
                     scheduledAt.UtcDateTime,
                     SessionStatus.Planned,
-                    maxPlayers))
+                    maxPlayers,
+                    joinLink))
                 .ToList();
         }
 
@@ -173,6 +175,7 @@ public sealed class TelegramLandingPromisesSmokeTests
                 parseResult.Title!,
                 parseResult.ScheduledTimes,
                 parseResult.MaxPlayers,
+                parseResult.Link!,
                 notificationMode);
 
             scenario.RenderBatch();
@@ -318,7 +321,8 @@ public sealed class TelegramLandingPromisesSmokeTests
                         session.Id,
                         session.ScheduledAt,
                         session.Status,
-                        session.MaxPlayers))
+                        session.MaxPlayers,
+                        session.JoinLink))
                     .ToList(),
                 participants
                     .Select(participant => new ParticipantBatchDto(
@@ -371,7 +375,8 @@ public sealed class TelegramLandingPromisesSmokeTests
         Guid Id,
         DateTime ScheduledAt,
         string Status,
-        int? MaxPlayers)
+        int? MaxPlayers,
+        string JoinLink)
     {
         public DateTime ScheduledAt { get; set; } = ScheduledAt;
     }

tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj

@@ -7,8 +7,13 @@
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <FrameworkReference Include="Microsoft.AspNetCore.App" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="coverlet.collector" Version="6.0.4" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.5" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.4" />

tests/GmRelay.Bot.Tests/Infrastructure/Database/PlatformIdentityMigrationTests.cs

@@ -0,0 +1,118 @@
+namespace GmRelay.Bot.Tests.Infrastructure.Database;
+
+public sealed class PlatformIdentityMigrationTests
+{
+    [Fact]
+    public async Task MigrationV016_ShouldAddPlatformIdentityColumns()
+    {
+        var migration = await ReadRepositoryFileAsync("src/GmRelay.Bot/Migrations/V016__add_platform_identity.sql");
+
+        Assert.Contains("players", migration, StringComparison.Ordinal);
+        Assert.Contains("platform", migration, StringComparison.Ordinal);
+        Assert.Contains("external_user_id", migration, StringComparison.Ordinal);
+        Assert.Contains("external_username", migration, StringComparison.Ordinal);
+
+        Assert.Contains("game_groups", migration, StringComparison.Ordinal);
+        Assert.Contains("external_group_id", migration, StringComparison.Ordinal);
+        Assert.Contains("external_channel_id", migration, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task MigrationV016_ShouldCreatePlatformMessagesTable()
+    {
+        var migration = await ReadRepositoryFileAsync("src/GmRelay.Bot/Migrations/V016__add_platform_identity.sql");
+
+        Assert.Contains("CREATE TABLE platform_messages", migration, StringComparison.Ordinal);
+        Assert.Contains("platform", migration, StringComparison.Ordinal);
+        Assert.Contains("group_id", migration, StringComparison.Ordinal);
+        Assert.Contains("batch_id", migration, StringComparison.Ordinal);
+        Assert.Contains("session_id", migration, StringComparison.Ordinal);
+        Assert.Contains("external_thread_id", migration, StringComparison.Ordinal);
+        Assert.Contains("external_message_id", migration, StringComparison.Ordinal);
+        Assert.Contains("purpose", migration, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task MigrationV016_ShouldBackfillExistingTelegramData()
+    {
+        var migration = await ReadRepositoryFileAsync("src/GmRelay.Bot/Migrations/V016__add_platform_identity.sql");
+
+        Assert.Contains("UPDATE players", migration, StringComparison.Ordinal);
+        Assert.Contains("UPDATE game_groups", migration, StringComparison.Ordinal);
+        Assert.Contains("'Telegram'", migration, StringComparison.Ordinal);
+        Assert.Contains("telegram_id", migration, StringComparison.Ordinal);
+        Assert.Contains("telegram_chat_id", migration, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task MigrationV016_ShouldNotDropLegacyTelegramColumns()
+    {
+        var migration = await ReadRepositoryFileAsync("src/GmRelay.Bot/Migrations/V016__add_platform_identity.sql");
+
+        Assert.DoesNotContain("DROP COLUMN telegram_id", migration, StringComparison.OrdinalIgnoreCase);
+        Assert.DoesNotContain("DROP COLUMN telegram_chat_id", migration, StringComparison.OrdinalIgnoreCase);
+        Assert.DoesNotContain("DROP COLUMN telegram_username", migration, StringComparison.OrdinalIgnoreCase);
+        Assert.DoesNotContain("DROP COLUMN gm_telegram_id", migration, StringComparison.OrdinalIgnoreCase);
+    }
+
+    [Fact]
+    public async Task Code_ShouldQueryPlayersUsingExternalUserIdFallback()
+    {
+        var createHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/CreateSessionHandler.cs");
+
+        Assert.Contains("external_user_id", createHandler, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task Code_ShouldQueryGroupsUsingExternalGroupIdFallback()
+    {
+        var createHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/CreateSessionHandler.cs");
+
+        Assert.Contains("external_group_id", createHandler, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task JoinSessionHandler_ShouldDualWritePlatformIdentity()
+    {
+        var handler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs");
+
+        Assert.Contains("external_user_id", handler, StringComparison.Ordinal);
+        Assert.Contains("external_username", handler, StringComparison.Ordinal);
+        Assert.Contains("platform", handler, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task WebSessionService_ShouldDualWritePlatformIdentity()
+    {
+        var service = await ReadRepositoryFileAsync("src/GmRelay.Web/Services/SessionService.cs");
+
+        Assert.Contains("external_user_id", service, StringComparison.Ordinal);
+        Assert.Contains("external_username", service, StringComparison.Ordinal);
+        Assert.Contains("platform", service, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task AttendanceStatsFunction_ShouldReferenceExternalUsername()
+    {
+        var statsMigration = await ReadRepositoryFileAsync("src/GmRelay.Bot/Migrations/V012__add_attendance_stats.sql");
+
+        Assert.Contains("external_username", statsMigration, 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/Infrastructure/Health/BotHealthCheckHostedServiceTests.cs

@@ -0,0 +1,54 @@
+using System.Net;
+using System.Net.Sockets;
+using GmRelay.Bot.Infrastructure.Health;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging.Abstractions;
+
+namespace GmRelay.Bot.Tests.Infrastructure.Health;
+
+public sealed class BotHealthCheckHostedServiceTests : IDisposable
+{
+    private readonly BotHealthCheckHostedService _service;
+    private readonly int _port;
+
+    public BotHealthCheckHostedServiceTests()
+    {
+        _port = GetAvailablePort();
+        var config = new ConfigurationBuilder()
+            .AddInMemoryCollection(new Dictionary<string, string?>
+            {
+                ["HealthCheck:Prefix"] = $"http://localhost:{_port}/"
+            })
+            .Build();
+
+        _service = new BotHealthCheckHostedService(
+            NullLogger<BotHealthCheckHostedService>.Instance,
+            config);
+    }
+
+    public void Dispose()
+    {
+        _service.StopAsync(CancellationToken.None).Wait(TimeSpan.FromSeconds(5));
+    }
+
+    [Fact]
+    public async Task HealthEndpoint_ShouldReturn200_WhenServiceIsRunning()
+    {
+        await _service.StartAsync(CancellationToken.None);
+
+        using var client = new HttpClient();
+        client.Timeout = TimeSpan.FromSeconds(5);
+        var response = await client.GetAsync($"http://localhost:{_port}/health");
+
+        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+    }
+
+    private static int GetAvailablePort()
+    {
+        var listener = new TcpListener(IPAddress.Loopback, 0);
+        listener.Start();
+        var port = ((IPEndPoint)listener.LocalEndpoint).Port;
+        listener.Stop();
+        return port;
+    }
+}

tests/GmRelay.Bot.Tests/Infrastructure/Scheduling/SessionSchedulerServiceTests.cs

@@ -0,0 +1,214 @@
+using GmRelay.Bot.Features.Confirmation.SendConfirmation;
+using GmRelay.Bot.Features.Reminders.SendJoinLink;
+using GmRelay.Bot.Features.Reminders.SendOneHourReminder;
+using GmRelay.Bot.Infrastructure.Scheduling;
+using Microsoft.Extensions.Logging.Abstractions;
+
+namespace GmRelay.Bot.Tests.Infrastructure.Scheduling;
+
+public sealed class SessionSchedulerServiceTests
+{
+    private readonly FakeSystemClock _clock = new();
+    private readonly FakeSessionTriggerStore _store = new();
+    private readonly FakeSendConfirmationHandler _confirmationHandler = new();
+    private readonly FakeSendOneHourReminderHandler _oneHourHandler = new();
+    private readonly FakeSendJoinLinkHandler _joinLinkHandler = new();
+
+    private SessionSchedulerService CreateSut()
+    {
+        return new SessionSchedulerService(
+            _store,
+            _confirmationHandler,
+            _oneHourHandler,
+            _joinLinkHandler,
+            _clock,
+            NullLogger<SessionSchedulerService>.Instance);
+    }
+
+    [Fact]
+    public async Task TickAsync_WhenSessionNeedsConfirmation_CallsConfirmationHandler()
+    {
+        var sessionId = Guid.NewGuid();
+        var now = new DateTimeOffset(2026, 5, 15, 10, 0, 0, TimeSpan.Zero);
+        _clock.UtcNow = now;
+        _store.SessionsNeedingConfirmation = [sessionId];
+
+        var sut = CreateSut();
+        await sut.TickAsync(CancellationToken.None);
+
+        Assert.Single(_confirmationHandler.Calls);
+        Assert.Equal(sessionId, _confirmationHandler.Calls[0]);
+    }
+
+    [Fact]
+    public async Task TickAsync_WhenSessionNeedsOneHourReminder_CallsOneHourHandler()
+    {
+        var sessionId = Guid.NewGuid();
+        var now = new DateTimeOffset(2026, 5, 15, 10, 0, 0, TimeSpan.Zero);
+        _clock.UtcNow = now;
+        _store.SessionsNeedingOneHourReminder = [sessionId];
+
+        var sut = CreateSut();
+        await sut.TickAsync(CancellationToken.None);
+
+        Assert.Single(_oneHourHandler.Calls);
+        Assert.Equal(sessionId, _oneHourHandler.Calls[0]);
+    }
+
+    [Fact]
+    public async Task TickAsync_WhenSessionNeedsJoinLink_CallsJoinLinkHandler()
+    {
+        var sessionId = Guid.NewGuid();
+        var now = new DateTimeOffset(2026, 5, 15, 10, 0, 0, TimeSpan.Zero);
+        _clock.UtcNow = now;
+        _store.SessionsNeedingJoinLink = [sessionId];
+
+        var sut = CreateSut();
+        await sut.TickAsync(CancellationToken.None);
+
+        Assert.Single(_joinLinkHandler.Calls);
+        Assert.Equal(sessionId, _joinLinkHandler.Calls[0]);
+    }
+
+    [Fact]
+    public async Task TickAsync_WhenMultipleTriggers_AllHandlersCalled()
+    {
+        var confirmId = Guid.NewGuid();
+        var remindId = Guid.NewGuid();
+        var linkId = Guid.NewGuid();
+        var now = new DateTimeOffset(2026, 5, 15, 10, 0, 0, TimeSpan.Zero);
+        _clock.UtcNow = now;
+        _store.SessionsNeedingConfirmation = [confirmId];
+        _store.SessionsNeedingOneHourReminder = [remindId];
+        _store.SessionsNeedingJoinLink = [linkId];
+
+        var sut = CreateSut();
+        await sut.TickAsync(CancellationToken.None);
+
+        Assert.Single(_confirmationHandler.Calls);
+        Assert.Single(_oneHourHandler.Calls);
+        Assert.Single(_joinLinkHandler.Calls);
+    }
+
+    [Fact]
+    public async Task TickAsync_WhenNoSessions_NothingCalled()
+    {
+        var sut = CreateSut();
+        await sut.TickAsync(CancellationToken.None);
+
+        Assert.Empty(_confirmationHandler.Calls);
+        Assert.Empty(_oneHourHandler.Calls);
+        Assert.Empty(_joinLinkHandler.Calls);
+    }
+
+    [Fact]
+    public async Task TickAsync_WhenConfirmationAlreadySent_DoesNotCallAgain()
+    {
+        var sessionId = Guid.NewGuid();
+        var now = new DateTimeOffset(2026, 5, 15, 10, 0, 0, TimeSpan.Zero);
+        _clock.UtcNow = now;
+        _store.SessionsNeedingConfirmation = [sessionId];
+
+        var sut = CreateSut();
+        await sut.TickAsync(CancellationToken.None);
+        Assert.Single(_confirmationHandler.Calls);
+
+        // Simulate idempotency: store no longer returns the session
+        _store.SessionsNeedingConfirmation = [];
+        await sut.TickAsync(CancellationToken.None);
+
+        Assert.Single(_confirmationHandler.Calls);
+    }
+
+    [Fact]
+    public async Task TickAsync_WhenHandlerThrows_LogsErrorAndContinues()
+    {
+        var goodId = Guid.NewGuid();
+        var badId = Guid.NewGuid();
+        var now = new DateTimeOffset(2026, 5, 15, 10, 0, 0, TimeSpan.Zero);
+        _clock.UtcNow = now;
+        _store.SessionsNeedingConfirmation = [badId, goodId];
+        _confirmationHandler.ThrowFor.Add(badId);
+
+        var sut = CreateSut();
+        await sut.TickAsync(CancellationToken.None);
+
+        Assert.Equal(2, _confirmationHandler.Calls.Count);
+        Assert.Equal(badId, _confirmationHandler.Calls[0]);
+        Assert.Equal(goodId, _confirmationHandler.Calls[1]);
+    }
+
+    [Fact]
+    public async Task TickAsync_WhenStoreThrows_LogsErrorAndDoesNotCrash()
+    {
+        _store.ThrowOnConfirmationQuery = true;
+        var sut = CreateSut();
+
+        var ex = await Record.ExceptionAsync(() => sut.TickAsync(CancellationToken.None));
+        Assert.Null(ex);
+    }
+
+    private sealed class FakeSendConfirmationHandler : ISendConfirmationHandler
+    {
+        public List<Guid> Calls { get; } = [];
+        public HashSet<Guid> ThrowFor { get; } = [];
+
+        public Task HandleAsync(Guid sessionId, CancellationToken ct)
+        {
+            Calls.Add(sessionId);
+            if (ThrowFor.Contains(sessionId))
+                throw new InvalidOperationException($"Boom for {sessionId}");
+            return Task.CompletedTask;
+        }
+    }
+
+    private sealed class FakeSendOneHourReminderHandler : ISendOneHourReminderHandler
+    {
+        public List<Guid> Calls { get; } = [];
+
+        public Task HandleAsync(Guid sessionId, CancellationToken ct)
+        {
+            Calls.Add(sessionId);
+            return Task.CompletedTask;
+        }
+    }
+
+    private sealed class FakeSendJoinLinkHandler : ISendJoinLinkHandler
+    {
+        public List<Guid> Calls { get; } = [];
+
+        public Task HandleAsync(Guid sessionId, CancellationToken ct)
+        {
+            Calls.Add(sessionId);
+            return Task.CompletedTask;
+        }
+    }
+
+    private sealed class FakeSessionTriggerStore : ISessionTriggerStore
+    {
+        public List<Guid> SessionsNeedingConfirmation { get; set; } = [];
+        public List<Guid> SessionsNeedingOneHourReminder { get; set; } = [];
+        public List<Guid> SessionsNeedingJoinLink { get; set; } = [];
+        public bool ThrowOnConfirmationQuery { get; set; }
+
+        public Task<IReadOnlyList<Guid>> GetSessionsNeedingConfirmationAsync(
+            DateTimeOffset now, CancellationToken ct)
+        {
+            if (ThrowOnConfirmationQuery)
+                throw new InvalidOperationException("Store boom");
+            return Task.FromResult<IReadOnlyList<Guid>>(SessionsNeedingConfirmation);
+        }
+
+        public Task<IReadOnlyList<Guid>> GetSessionsNeedingOneHourReminderAsync(
+            DateTimeOffset now, CancellationToken ct)
+        {
+            return Task.FromResult<IReadOnlyList<Guid>>(SessionsNeedingOneHourReminder);
+        }
+
+        public Task<IReadOnlyList<Guid>> GetSessionsNeedingJoinLinkAsync(
+            DateTimeOffset now, CancellationToken ct)
+        {
+            return Task.FromResult<IReadOnlyList<Guid>>(SessionsNeedingJoinLink);
+        }
+    }
+}

tests/GmRelay.Bot.Tests/Infrastructure/Telegram/TelegramPlatformMessengerSourceTests.cs

@@ -0,0 +1,60 @@
+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}'.");
+    }
+}

tests/GmRelay.Bot.Tests/Infrastructure/Telegram/TelegramPlatformMessengerTests.cs

@@ -0,0 +1,44 @@
+using GmRelay.Bot.Infrastructure.Telegram;
+using GmRelay.Shared.Platform;
+using GmRelay.Shared.Rendering;
+using Microsoft.Extensions.Logging.Abstractions;
+
+namespace GmRelay.Bot.Tests.Infrastructure.Telegram;
+
+public sealed class TelegramPlatformMessengerTests
+{
+    [Fact]
+    public async Task UpdateScheduleAsync_ShouldRejectNonTelegramExistingMessageReference()
+    {
+        var messenger = CreateMessenger();
+        var message = new PlatformScheduleMessage(
+            new PlatformGroup(PlatformKind.Telegram, "100", "Telegram group"),
+            CreateView(),
+            new PlatformMessageRef(PlatformKind.Discord, "100", null, "200"));
+
+        await Assert.ThrowsAsync<NotSupportedException>(
+            () => messenger.UpdateScheduleAsync(message, CancellationToken.None));
+    }
+
+    [Fact]
+    public async Task UpdateScheduleAsync_ShouldRejectMismatchedGroupAndExistingMessageReference()
+    {
+        var messenger = CreateMessenger();
+        var message = new PlatformScheduleMessage(
+            new PlatformGroup(PlatformKind.Telegram, "100", "Telegram group", ExternalThreadId: "7"),
+            CreateView(),
+            new PlatformMessageRef(PlatformKind.Telegram, "101", "7", "200"));
+
+        var exception = await Assert.ThrowsAsync<ArgumentException>(
+            () => messenger.UpdateScheduleAsync(message, CancellationToken.None));
+
+        Assert.Equal("message", exception.ParamName);
+        Assert.Contains("Existing schedule message reference must match the schedule group.", exception.Message);
+    }
+
+    private static TelegramPlatformMessenger CreateMessenger() =>
+        new(null!, NullLogger<TelegramPlatformMessenger>.Instance);
+
+    private static SessionBatchViewModel CreateView() =>
+        new("Test batch", []);
+}

tests/GmRelay.Bot.Tests/Infrastructure/Telegram/TelegramTopicIntegrationSmokeTests.cs

@@ -0,0 +1,76 @@
+namespace GmRelay.Bot.Tests.Infrastructure.Telegram;
+
+public sealed class TelegramTopicIntegrationSmokeTests
+{
+    [Fact]
+    public async Task BotAndWebCode_ShouldPersistAndUseTopicOwnership()
+    {
+        var migration = await ReadRepositoryFileAsync("src/GmRelay.Bot/Migrations/V015__add_topic_ownership.sql");
+        var createHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/CreateSessionHandler.cs");
+        var deleteHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/ListSessions/DeleteSessionHandler.cs");
+
+        Assert.Contains("topic_created_by_bot", migration, StringComparison.Ordinal);
+        Assert.Contains("ResolveNewScheduleDestination", createHandler, StringComparison.Ordinal);
+        Assert.Contains("message.MessageThreadId", createHandler, StringComparison.Ordinal);
+        Assert.Contains("topic_created_by_bot", createHandler, StringComparison.Ordinal);
+        Assert.Contains("MissingForumTopicRightsMessage", createHandler, StringComparison.Ordinal);
+        Assert.Contains("TopicCreatedByBot", deleteHandler, StringComparison.Ordinal);
+        Assert.Contains("ShouldDeleteForumTopic", deleteHandler, StringComparison.Ordinal);
+        Assert.Contains("remainingInTopic", deleteHandler, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task GroupNotifications_ShouldSendToStoredForumTopic()
+    {
+        var confirmationHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Confirmation/SendConfirmation/SendConfirmationHandler.cs");
+        var joinLinkHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Reminders/SendJoinLink/SendJoinLinkHandler.cs");
+        var rsvpHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Confirmation/HandleRsvp/HandleRsvpHandler.cs");
+        var cancelHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/CancelSessionHandler.cs");
+        var initiateRescheduleHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/RescheduleSession/InitiateRescheduleHandler.cs");
+        var rescheduleInputHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleTimeInputHandler.cs");
+        var rescheduleDeadlineService = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/RescheduleSession/RescheduleVotingDeadlineService.cs");
+
+        Assert.Contains("int? ThreadId", confirmationHandler, StringComparison.Ordinal);
+        Assert.Contains("s.thread_id AS ThreadId", confirmationHandler, StringComparison.Ordinal);
+        Assert.Contains("messageThreadId: session.ThreadId", confirmationHandler, StringComparison.Ordinal);
+
+        Assert.Contains("int? ThreadId", joinLinkHandler, StringComparison.Ordinal);
+        Assert.Contains("s.thread_id AS ThreadId", joinLinkHandler, StringComparison.Ordinal);
+        Assert.Contains("messageThreadId: session.ThreadId", joinLinkHandler, StringComparison.Ordinal);
+
+        Assert.Contains("int? ThreadId", rsvpHandler, StringComparison.Ordinal);
+        Assert.Contains("s.thread_id AS ThreadId", rsvpHandler, StringComparison.Ordinal);
+        Assert.Contains("messageThreadId: session.ThreadId", rsvpHandler, StringComparison.Ordinal);
+
+        Assert.Contains("int? MessageThreadId", cancelHandler, StringComparison.Ordinal);
+        Assert.Contains("TelegramPlatformIds.Group(command.ChatId, command.MessageThreadId)", cancelHandler, StringComparison.Ordinal);
+
+        Assert.Contains("int? MessageThreadId", initiateRescheduleHandler, StringComparison.Ordinal);
+        Assert.Contains("TelegramPlatformIds.Group(command.ChatId, command.MessageThreadId)", initiateRescheduleHandler, StringComparison.Ordinal);
+
+        Assert.Contains("int? ThreadId", rescheduleInputHandler, StringComparison.Ordinal);
+        Assert.Contains("s.thread_id AS ThreadId", rescheduleInputHandler, StringComparison.Ordinal);
+        Assert.Contains("TelegramPlatformIds.Group(proposal.TelegramChatId, proposal.ThreadId)", rescheduleInputHandler, StringComparison.Ordinal);
+
+        Assert.Contains("int? ThreadId", rescheduleDeadlineService, StringComparison.Ordinal);
+        Assert.Contains("s.thread_id AS ThreadId", rescheduleDeadlineService, StringComparison.Ordinal);
+        Assert.Contains("TelegramPlatformIds.Group(proposal.TelegramChatId, proposal.ThreadId)", rescheduleDeadlineService, 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/Infrastructure/Telegram/TelegramTopicRoutingTests.cs

@@ -0,0 +1,80 @@
+using GmRelay.Bot.Infrastructure.Telegram;
+
+namespace GmRelay.Bot.Tests.Infrastructure.Telegram;
+
+public sealed class TelegramTopicRoutingTests
+{
+    [Fact]
+    public void ResolveNewScheduleDestination_UsesIncomingTopic_WhenForumCommandWasSentInsideTopic()
+    {
+        var destination = TelegramTopicRouting.ResolveNewScheduleDestination(
+            chatIsForum: true,
+            incomingMessageThreadId: 42);
+
+        Assert.Equal(42, destination.MessageThreadId);
+        Assert.False(destination.ShouldCreateForumTopic);
+        Assert.False(destination.TopicCreatedByBot);
+    }
+
+    [Fact]
+    public void ResolveNewScheduleDestination_CreatesBotOwnedTopic_WhenForumCommandWasSentInRoot()
+    {
+        var destination = TelegramTopicRouting.ResolveNewScheduleDestination(
+            chatIsForum: true,
+            incomingMessageThreadId: null);
+
+        Assert.Null(destination.MessageThreadId);
+        Assert.True(destination.ShouldCreateForumTopic);
+        Assert.True(destination.TopicCreatedByBot);
+    }
+
+    [Fact]
+    public void ResolveNewScheduleDestination_UsesPlainChat_WhenChatIsNotForum()
+    {
+        var destination = TelegramTopicRouting.ResolveNewScheduleDestination(
+            chatIsForum: false,
+            incomingMessageThreadId: 42);
+
+        Assert.Null(destination.MessageThreadId);
+        Assert.False(destination.ShouldCreateForumTopic);
+        Assert.False(destination.TopicCreatedByBot);
+    }
+
+    [Fact]
+    public void MissingForumTopicRightsMessage_NamesRequiredAdminRight()
+    {
+        Assert.Contains("admin", TelegramTopicRouting.MissingForumTopicRightsMessage, StringComparison.OrdinalIgnoreCase);
+        Assert.Contains("Manage Topics", TelegramTopicRouting.MissingForumTopicRightsMessage, StringComparison.Ordinal);
+    }
+
+    [Theory]
+    [InlineData("Bad Request: not enough rights to create forum topic")]
+    [InlineData("Bad Request: CHAT_ADMIN_REQUIRED")]
+    [InlineData("Forbidden: bot is not an administrator")]
+    public void IsMissingForumTopicRightsError_MatchesAdminPermissionErrors(string apiError)
+    {
+        Assert.True(TelegramTopicRouting.IsMissingForumTopicRightsError(apiError));
+    }
+
+    [Fact]
+    public void IsMissingForumTopicRightsError_IgnoresUnrelatedApiErrors()
+    {
+        Assert.False(TelegramTopicRouting.IsMissingForumTopicRightsError("Bad Request: topic name is invalid"));
+    }
+
+    [Theory]
+    [InlineData(true, 0, true)]
+    [InlineData(true, 1, false)]
+    [InlineData(false, 0, false)]
+    public void ShouldDeleteForumTopic_DeletesOnlyBotOwnedEmptyTopic(
+        bool topicCreatedByBot,
+        int remainingSessionsInTopic,
+        bool expected)
+    {
+        var shouldDelete = TelegramTopicRouting.ShouldDeleteForumTopic(
+            topicCreatedByBot,
+            remainingSessionsInTopic);
+
+        Assert.Equal(expected, shouldDelete);
+    }
+}

tests/GmRelay.Bot.Tests/Platform/PlatformContractsTests.cs

@@ -0,0 +1,54 @@
+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);
+    }
+}

tests/GmRelay.Bot.Tests/Project/LicenseFileTests.cs

@@ -0,0 +1,46 @@
+using System;
+using System.IO;
+using Xunit;
+
+namespace GmRelay.Bot.Tests.Project;
+
+public class LicenseFileTests
+{
+    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 LicenseFile_ExistsInRepoRoot()
+    {
+        var repoRoot = GetRepoRoot();
+        var licensePath = Path.Combine(repoRoot, "LICENSE");
+        Assert.True(File.Exists(licensePath), "LICENSE file should exist in repo root");
+    }
+
+    [Fact]
+    public void LicenseFile_ContainsMitLicenseText()
+    {
+        var repoRoot = GetRepoRoot();
+        var licensePath = Path.Combine(repoRoot, "LICENSE");
+        Assert.True(File.Exists(licensePath), "LICENSE file should exist");
+        var content = File.ReadAllText(licensePath);
+        Assert.Contains("MIT License", content);
+    }
+
+    [Fact]
+    public void Readme_ReferencesLicenseFile()
+    {
+        var repoRoot = GetRepoRoot();
+        var readmePath = Path.Combine(repoRoot, "README.md");
+        Assert.True(File.Exists(readmePath), "README.md should exist");
+        var content = File.ReadAllText(readmePath);
+        Assert.Contains("./LICENSE", content);
+    }
+}

tests/GmRelay.Bot.Tests/Rendering/SessionBatchViewBuilderTests.cs

@@ -14,9 +14,9 @@ public sealed class SessionBatchViewBuilderTests
 
         var sessions = new[]
         {
-            new SessionBatchDto(secondSessionId, new DateTime(2026, 4, 27, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 4),
+            new SessionBatchDto(secondSessionId, new DateTime(2026, 4, 27, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 4, "https://example.com/game"),
-            new SessionBatchDto(cancelledSessionId, new DateTime(2026, 4, 28, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Cancelled, null),
+            new SessionBatchDto(cancelledSessionId, new DateTime(2026, 4, 28, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Cancelled, null, ""),
-            new SessionBatchDto(firstSessionId, new DateTime(2026, 4, 26, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 2)
+            new SessionBatchDto(firstSessionId, new DateTime(2026, 4, 26, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 2, "https://example.com/game")
         };
         var participants = new[]
         {
@@ -38,7 +38,7 @@ public sealed class SessionBatchViewBuilderTests
     public void Build_ShouldCalculatePlayerCounts()
     {
         var sessionId = Guid.NewGuid();
-        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, 4) };
+        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, 4, "https://example.com/game") };
         var participants = new[]
         {
             new ParticipantBatchDto(sessionId, "Alice", "alice", ParticipantRegistrationStatus.Active),
@@ -51,23 +51,23 @@ public sealed class SessionBatchViewBuilderTests
 
         Assert.Equal(2, session.ActivePlayerCount);
         Assert.Equal(4, session.MaxPlayers);
-        Assert.Equal(2, session.ActivePlayers.Count);
+        Assert.True(session.ActivePlayers.Count == 2);
-        Assert.Equal(1, session.WaitlistedPlayers.Count);
+        Assert.True(session.WaitlistedPlayers.Count == 1);
     }
 
     [Fact]
     public void Build_ShouldIncludeActionsForActiveSessions()
     {
         var sessionId = Guid.NewGuid();
-        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, 4) };
+        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, 4, "https://example.com/game") };
         var participants = Array.Empty<ParticipantBatchDto>();
 
         var result = SessionBatchViewBuilder.Build("Test", sessions, participants);
         var actions = result.Sessions[0].AvailableActions;
 
         Assert.Equal(2, actions.Count);
-        Assert.Equal("join_session", actions[0].ActionKey);
+        Assert.Equal("join_session", result.Sessions[0].AvailableActions[0].ActionKey);
-        Assert.Equal("leave_session", actions[1].ActionKey);
+        Assert.Equal("leave_session", result.Sessions[0].AvailableActions[1].ActionKey);
         Assert.Equal(sessionId, actions[0].SessionId);
         Assert.Equal(sessionId, actions[1].SessionId);
     }
@@ -76,7 +76,7 @@ public sealed class SessionBatchViewBuilderTests
     public void Build_ShouldNotIncludeActionsForCancelledSessions()
     {
         var sessionId = Guid.NewGuid();
-        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Cancelled, null) };
+        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Cancelled, null, "") };
         var participants = Array.Empty<ParticipantBatchDto>();
 
         var result = SessionBatchViewBuilder.Build("Test", sessions, participants);
@@ -88,7 +88,7 @@ public sealed class SessionBatchViewBuilderTests
     public void Build_ShouldMarkWaitlistActionWhenFull()
     {
         var sessionId = Guid.NewGuid();
-        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, 1) };
+        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, 1, "https://example.com/game") };
         var participants = new[] { new ParticipantBatchDto(sessionId, "Alice", "alice", ParticipantRegistrationStatus.Active) };
 
         var result = SessionBatchViewBuilder.Build("Test", sessions, participants);
@@ -101,7 +101,7 @@ public sealed class SessionBatchViewBuilderTests
     public void Build_ShouldIncludePlayerUsernames()
     {
         var sessionId = Guid.NewGuid();
-        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, null) };
+        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, null, "https://example.com/game") };
         var participants = new[] { new ParticipantBatchDto(sessionId, "Alice", "alice", ParticipantRegistrationStatus.Active) };
 
         var result = SessionBatchViewBuilder.Build("Test", sessions, participants);

tests/GmRelay.Bot.Tests/Rendering/TelegramSessionBatchRendererTests.cs

@@ -1,3 +1,4 @@
+using GmRelay.Bot.Infrastructure.Telegram;
 using GmRelay.Shared.Domain;
 using GmRelay.Shared.Rendering;
 using Telegram.Bot.Types.ReplyMarkups;
@@ -15,9 +16,9 @@ public sealed class TelegramSessionBatchRendererTests
 
         var sessions = new[]
         {
-            new SessionBatchDto(secondSessionId, new DateTime(2026, 4, 27, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 4),
+            new SessionBatchDto(secondSessionId, new DateTime(2026, 4, 27, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 4, "https://example.com/game2"),
-            new SessionBatchDto(cancelledSessionId, new DateTime(2026, 4, 28, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Cancelled, null),
+            new SessionBatchDto(cancelledSessionId, new DateTime(2026, 4, 28, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Cancelled, null, ""),
-            new SessionBatchDto(firstSessionId, new DateTime(2026, 4, 26, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 2)
+            new SessionBatchDto(firstSessionId, new DateTime(2026, 4, 26, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 2, "https://example.com/game1")
         };
         var participants = new[]
         {
@@ -34,6 +35,9 @@ public sealed class TelegramSessionBatchRendererTests
         Assert.Contains("Charlie", text);
         Assert.Contains("Bob", text);
         Assert.Contains("Сессия отменена", text);
+        Assert.Contains("Ссылка на игру", text);
+        Assert.Contains("https://example.com/game1", text);
+        Assert.Contains("https://example.com/game2", text);
 
         var buttons = markup.InlineKeyboard.SelectMany(row => row).ToList();
         Assert.Equal(4, buttons.Count); // 2 sessions x 2 buttons each
@@ -50,7 +54,7 @@ public sealed class TelegramSessionBatchRendererTests
     public void Render_ShouldSkipButtonsForCancelledSessions()
     {
         var cancelledSessionId = Guid.NewGuid();
-        var sessions = new[] { new SessionBatchDto(cancelledSessionId, DateTime.UtcNow, SessionStatus.Cancelled, null) };
+        var sessions = new[] { new SessionBatchDto(cancelledSessionId, DateTime.UtcNow, SessionStatus.Cancelled, null, "") };
         var participants = Array.Empty<ParticipantBatchDto>();
 
         var view = SessionBatchViewBuilder.Build("Test", sessions, participants);
@@ -63,7 +67,7 @@ public sealed class TelegramSessionBatchRendererTests
     public void Render_ShouldShowWaitlistButtonWhenFull()
     {
         var sessionId = Guid.NewGuid();
-        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, 1) };
+        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, 1, "https://example.com/game") };
         var participants = new[] { new ParticipantBatchDto(sessionId, "Alice", "alice", ParticipantRegistrationStatus.Active) };
 
         var view = SessionBatchViewBuilder.Build("Test", sessions, participants);

tests/GmRelay.Bot.Tests/Web/AuthorizedSessionServiceTests.cs

@@ -167,6 +167,127 @@ public sealed class AuthorizedSessionServiceTests
         Assert.Equal(5, store.LastUpdatedMaxPlayers);
     }
 
+    [Fact]
+    public async Task UpdateSessionForGmAsync_LogsAudit_WhenTitleChanges()
+    {
+        var gmId = 1001L;
+        var groupId = Guid.NewGuid();
+        var sessionId = Guid.NewGuid();
+        var originalTime = DateTime.UtcNow;
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", gmId)
+            ],
+            sessions:
+            [
+                new(sessionId, groupId, "Session A", originalTime, "Planned", "https://example.test/a", Guid.NewGuid(), 10, 42, 4, 1, 0)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        await service.UpdateSessionForGmAsync(sessionId, gmId, "Updated Title", originalTime, "https://example.test/a", 4);
+
+        Assert.Single(store.LogEntries);
+        Assert.Equal("Title", store.LogEntries[0].ChangeType);
+        Assert.Equal("Session A", store.LogEntries[0].OldValue);
+        Assert.Equal("Updated Title", store.LogEntries[0].NewValue);
+    }
+
+    [Fact]
+    public async Task UpdateSessionForGmAsync_LogsMultipleAudits_WhenMultipleFieldsChange()
+    {
+        var gmId = 1001L;
+        var groupId = Guid.NewGuid();
+        var sessionId = Guid.NewGuid();
+        var originalTime = DateTime.UtcNow;
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", gmId)
+            ],
+            sessions:
+            [
+                new(sessionId, groupId, "Session A", originalTime, "Planned", "https://example.test/a", Guid.NewGuid(), 10, 42, 4, 1, 0)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        var newTime = originalTime.AddDays(1);
+        await service.UpdateSessionForGmAsync(sessionId, gmId, "Updated Title", newTime, "https://example.test/b", 5);
+
+        Assert.Equal(4, store.LogEntries.Count);
+        Assert.Contains(store.LogEntries, e => e.ChangeType == "Title");
+        Assert.Contains(store.LogEntries, e => e.ChangeType == "Time");
+        Assert.Contains(store.LogEntries, e => e.ChangeType == "Link");
+        Assert.Contains(store.LogEntries, e => e.ChangeType == "MaxPlayers");
+    }
+
+    [Fact]
+    public async Task UpdateSessionForGmAsync_DoesNotLogAudit_WhenNothingChanges()
+    {
+        var gmId = 1001L;
+        var groupId = Guid.NewGuid();
+        var sessionId = Guid.NewGuid();
+        var originalTime = DateTime.UtcNow;
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", gmId)
+            ],
+            sessions:
+            [
+                new(sessionId, groupId, "Session A", originalTime, "Planned", "https://example.test/a", Guid.NewGuid(), 10, 42, 4, 1, 0)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        await service.UpdateSessionForGmAsync(sessionId, gmId, "Session A", originalTime, "https://example.test/a", 4);
+
+        Assert.Empty(store.LogEntries);
+    }
+
+    [Fact]
+    public async Task GetSessionHistoryForGmAsync_ReturnsHistory_WhenSessionBelongsToOwnedGroup()
+    {
+        var gmId = 1001L;
+        var groupId = Guid.NewGuid();
+        var sessionId = Guid.NewGuid();
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", gmId)
+            ],
+            sessions:
+            [
+                new(sessionId, groupId, "Session A", DateTime.UtcNow, "Planned", "https://example.test/a", Guid.NewGuid(), 10, 42, 4, 1, 0)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        var history = await service.GetSessionHistoryForGmAsync(sessionId, gmId);
+
+        Assert.NotNull(history);
+        Assert.Empty(history);
+    }
+
+    [Fact]
+    public async Task GetSessionHistoryForGmAsync_ReturnsNull_WhenSessionBelongsToAnotherGm()
+    {
+        var groupId = Guid.NewGuid();
+        var sessionId = Guid.NewGuid();
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", 2002L)
+            ],
+            sessions:
+            [
+                new(sessionId, groupId, "Session A", DateTime.UtcNow, "Planned", "https://example.test/a", Guid.NewGuid(), 10, 42, 4, 1, 0)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        var history = await service.GetSessionHistoryForGmAsync(sessionId, 1001L);
+
+        Assert.Null(history);
+    }
+
     [Fact]
     public async Task PromoteWaitlistedPlayerForGmAsync_PromotesOwnedSession()
     {
@@ -659,6 +780,13 @@ public sealed class AuthorizedSessionServiceTests
         public Guid? LastRemovedPlayerSessionId { get; private set; }
         public Guid? LastRemovedPlayerGroupId { get; private set; }
         public Guid? LastRemovedPlayerParticipantId { get; private set; }
+        public List<SessionAuditLogEntry> LogEntries { get; private set; } = new();
+        public Guid? LastLogSessionId { get; private set; }
+        public long? LastLogActorTelegramId { get; private set; }
+        public string? LastLogActorName { get; private set; }
+        public string? LastLogChangeType { get; private set; }
+        public string? LastLogOldValue { get; private set; }
+        public string? LastLogNewValue { get; private set; }
 
         public Task<List<WebGameGroup>> GetGroupsForGmAsync(long gmId) =>
             Task.FromResult(groupsById.Values.Where(group => IsManager(group.Id, gmId)).ToList());
@@ -886,6 +1014,25 @@ public sealed class AuthorizedSessionServiceTests
             return Task.CompletedTask;
         }
 
+        public Task<List<PlayerAttendanceStats>> GetGroupAttendanceStatsAsync(Guid groupId) =>
+            Task.FromResult(new List<PlayerAttendanceStats>());
+
+        public Task LogSessionChangeAsync(Guid sessionId, long actorTelegramId, string actorName, string changeType, string? oldValue, string? newValue)
+        {
+            var entry = new SessionAuditLogEntry(Guid.NewGuid(), sessionId, actorTelegramId, actorName, changeType, oldValue, newValue, DateTime.UtcNow);
+            LogEntries.Add(entry);
+            LastLogSessionId = sessionId;
+            LastLogActorTelegramId = actorTelegramId;
+            LastLogActorName = actorName;
+            LastLogChangeType = changeType;
+            LastLogOldValue = oldValue;
+            LastLogNewValue = newValue;
+            return Task.CompletedTask;
+        }
+
+        public Task<List<SessionAuditLogEntry>> GetSessionHistoryAsync(Guid sessionId) =>
+            Task.FromResult(LogEntries.Where(e => e.SessionId == sessionId).OrderByDescending(e => e.ChangedAt).ToList());
+
         private bool IsManager(Guid groupId, long telegramId) =>
             IsOwner(groupId, telegramId) ||
             managers.Any(manager => manager.GroupId == groupId && manager.TelegramId == telegramId);

tests/GmRelay.Bot.Tests/Web/WebHealthEndpointTests.cs

@@ -0,0 +1,86 @@
+using GmRelay.Web.Health;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Diagnostics.HealthChecks;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.TestHost;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+using Npgsql;
+using System.Net;
+using System.Text.Json;
+
+namespace GmRelay.Bot.Tests.Web;
+
+public sealed class WebHealthEndpointTests
+{
+    private static WebApplication CreateTestApp(HealthStatus npgsqlStatus)
+    {
+        var builder = WebApplication.CreateBuilder();
+        builder.WebHost.UseTestServer();
+        builder.Services.AddHealthChecks()
+            .AddCheck("self", () => HealthCheckResult.Healthy(), ["live"])
+            .AddCheck("npgsql", () => new HealthCheckResult(npgsqlStatus));
+
+        var app = builder.Build();
+        app.MapHealthChecks("/health", new HealthCheckOptions
+        {
+            ResponseWriter = async (context, report) =>
+            {
+                context.Response.ContentType = "application/json";
+                var response = new
+                {
+                    status = report.Status == HealthStatus.Healthy ? "healthy" : "unhealthy",
+                    timestamp = DateTimeOffset.UtcNow.ToString("O")
+                };
+                await context.Response.WriteAsJsonAsync(response);
+            }
+        });
+        app.MapHealthChecks("/alive", new HealthCheckOptions
+        {
+            Predicate = r => r.Tags.Contains("live")
+        });
+
+        return app;
+    }
+
+    [Fact]
+    public async Task HealthEndpoint_ShouldReturn200AndJson_WhenHealthy()
+    {
+        await using var app = CreateTestApp(HealthStatus.Healthy);
+        await app.StartAsync();
+        using var client = app.GetTestClient();
+
+        var response = await client.GetAsync("/health");
+
+        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+        var content = await response.Content.ReadAsStringAsync();
+        using var doc = JsonDocument.Parse(content);
+        Assert.Equal("healthy", doc.RootElement.GetProperty("status").GetString());
+        Assert.NotNull(doc.RootElement.GetProperty("timestamp").GetString());
+    }
+
+    [Fact]
+    public async Task HealthEndpoint_ShouldReturn503_WhenDatabaseUnavailable()
+    {
+        await using var app = CreateTestApp(HealthStatus.Unhealthy);
+        await app.StartAsync();
+        using var client = app.GetTestClient();
+
+        var response = await client.GetAsync("/health");
+
+        Assert.Equal(HttpStatusCode.ServiceUnavailable, response.StatusCode);
+    }
+
+    [Fact]
+    public async Task NpgsqlHealthCheck_ShouldReturnUnhealthy_WhenDatabaseIsInaccessible()
+    {
+        var dataSource = NpgsqlDataSource.Create("Host=localhost;Port=5432;Database=gmrelay_db;Username=gmrelay;Password=fake");
+        var healthCheck = new NpgsqlHealthCheck(dataSource);
+
+        var result = await healthCheck.CheckHealthAsync(new HealthCheckContext());
+
+        Assert.Equal(HealthStatus.Unhealthy, result.Status);
+        Assert.NotNull(result.Exception);
+    }
+}