Merge pull request #81: feat: refresh dashboard design with fantasy RPG aesthetic

🎨 Dashboard design refresh
- Complete fantasy RPG aesthetic overhaul
- Glass-morphism cards with gradient borders
- Cinzel + Jura typography
- Atmospheric backgrounds with noise texture

🧹 Chore: migrated k8s manifests to gmrelay-k8s repo

Bump version → 2.1.0

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

.gitea/workflows/deploy.yml

@@ -6,7 +6,7 @@ on:
       - main 
 
 env:
-  VERSION: 1.15.1
+  VERSION: 2.1.0
 
 jobs:
   # ЧАСТЬ 1: Собираем образы и кладем в Gitea (чтобы делиться с ребятами)

.hermes/plans/gmrelay-issue-15.md

@@ -1,343 +0,0 @@
-# Issue #15: Session Audit Log Implementation Plan
-
-> **For Hermes:** Use subagent-driven-development skill to implement this plan task-by-task.
-
-**Goal:** Add transparent audit history for every session change, visible to GM in Web Dashboard.
-
-**Architecture:** PostgreSQL audit table + Dapper queries. Automatic logging inside mutating SessionService methods. New Razor page for GM history view.
-
-**Tech Stack:** C# 12, Blazor SSR, Dapper, PostgreSQL, xUnit.
-
-**Branch:** `issue-15-session-audit-log` (includes mobile UI bugfix cherry-pick)
-
-**Version Bump:** `1.10.1` → `1.10.2`
-
----
-
-## Task 1: Database Migration (V013)
-
-**Objective:** Create `session_audit_log` table.
-
-**File:** Create `src/GmRelay.Bot/Migrations/V013__add_session_audit_log.sql`
-
-```sql
-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);
-```
-
-**Step 2:** Verify migration compiles: `psql $DATABASE_URL -f src/GmRelay.Bot/Migrations/V013__add_session_audit_log.sql` (optional, CI will test)
-
-**Step 3:** Commit: `git add src/GmRelay.Bot/Migrations/V013__add_session_audit_log.sql && git commit -m "chore(#15): add session_audit_log migration"`
-
----
-
-## Task 2: Domain Model & Interface Methods
-
-**Objective:** Add `SessionAuditLogEntry` record and two new methods to `ISessionStore`.
-
-**Files:**
-- Modify: `src/GmRelay.Web/Services/ISessionStore.cs`
-- Modify: `src/GmRelay.Web/Services/SessionService.cs`
-
-**Step 1: Add record to ISessionStore.cs** (after PlayerAttendanceStats)
-
-```csharp
-public sealed record SessionAuditLogEntry(
-    Guid Id,
-    Guid SessionId,
-    long ActorTelegramId,
-    string ActorName,
-    string ChangeType,
-    string? OldValue,
-    string? NewValue,
-    DateTime ChangedAt
-);
-```
-
-**Step 2: Add methods to ISessionStore interface**
-
-```csharp
-Task LogSessionChangeAsync(Guid sessionId, long actorTelegramId, string actorName, string changeType, string? oldValue, string? newValue);
-Task<List<SessionAuditLogEntry>> GetSessionHistoryAsync(Guid sessionId);
-```
-
-**Step 3: Implement in SessionService.cs**
-
-```csharp
-public async Task LogSessionChangeAsync(Guid sessionId, long actorTelegramId, string actorName, string changeType, string? oldValue, string? newValue)
-{
-    using var connection = new NpgsqlConnection(connectionString);
-    await connection.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, actorTelegramId, actorName, changeType, oldValue, newValue });
-}
-
-public async Task<List<SessionAuditLogEntry>> GetSessionHistoryAsync(Guid sessionId)
-{
-    using var connection = new NpgsqlConnection(connectionString);
-    var entries = await connection.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 });
-    return entries.ToList();
-}
-```
-
-**Step 4:** Commit: `git add -A && git commit -m "feat(#15): add SessionAuditLogEntry and audit store methods"`
-
----
-
-## Task 3: Instrument Mutating Methods
-
-**Objective:** Auto-log changes in key methods. Only log when value actually changes.
-
-**File:** Modify `src/GmRelay.Web/Services/SessionService.cs`
-
-**Step 1: Instrument UpdateSessionAsync**
-
-Before executing UPDATE, read current session. After UPDATE, compare and log each changed field:
-
-```csharp
-// After var currentSession = await GetSessionAsync(sessionId);
-// Before the UPDATE SQL:
-
-if (currentSession is not null)
-{
-    if (currentSession.Title != title)
-        await LogSessionChangeAsync(sessionId, /* actor will be passed from caller */ ...);
-}
-```
-
-**Problem:** SessionService doesn't know the actor (GM) telegram ID. Solution: add `long actorTelegramId` parameter to mutating methods, or use a decorator pattern.
-
-**Better approach:** Instrument in `AuthorizedSessionService` which already has `gmId`. That is the authorized wrapper.
-
-**Revised approach:** Add `IAuditLogger` interface and inject it. Or simpler: change `ISessionStore` mutating methods to accept `long actorTelegramId` and `string actorName` as last parameters.
-
-**Simpler approach for this plan:** Since all mutating methods in `ISessionStore` are called through `AuthorizedSessionService`, instrument in `AuthorizedSessionService` methods AFTER the underlying `SessionService` call. BUT we need old values. 
-
-**Final approach:** Change `ISessionStore` methods to include `actorTelegramId` parameter, and inside `SessionService` fetch old values and log.
-
-Let's add `long actorTelegramId` parameter to:
-- `UpdateSessionAsync`
-- `PromoteWaitlistedPlayerAsync`
-- `RemovePlayerFromSessionAsync`
-- `RescheduleBatchAsync`
-
-Wait, this is a bigger change. Let's be more pragmatic: add a new `IAuditService` that can be called from `AuthorizedSessionService` after mutations. `IAuditService` just wraps `ISessionStore.LogSessionChangeAsync`.
-
-Actually, simplest: add `actorTelegramId` and `actorName` parameters to `LogSessionChangeAsync` and call it from `AuthorizedSessionService` after each mutation. For old/new values, read the session before mutation in AuthorizedSessionService.
-
-**Plan:**
-- `AuthorizedSessionService.UpdateSessionForGmAsync`: read session before update, call update, then log differences.
-- Same pattern for other mutating methods.
-
-**Step 1: Read current session in AuthorizedSessionService.UpdateSessionForGmAsync**
-
-```csharp
-public async Task UpdateSessionForGmAsync(Guid sessionId, long gmId, string title, DateTime scheduledAt, string joinLink, int? maxPlayers)
-{
-    var groupId = await EnforceSessionOwnershipAsync(sessionId, gmId);
-    var before = await store.GetSessionAsync(sessionId);  // add this
-    await store.UpdateSessionAsync(sessionId, groupId, title, scheduledAt, joinLink, maxPlayers);
-    if (before is not null)
-    {
-        if (before.Title != title)
-            await store.LogSessionChangeAsync(sessionId, gmId, "ГМ", "Title", before.Title, title);
-        if (before.ScheduledAt != scheduledAt)
-            await store.LogSessionChangeAsync(sessionId, gmId, "ГМ", "Time", before.ScheduledAt.ToString("O"), scheduledAt.ToString("O"));
-        if (before.JoinLink != joinLink)
-            await store.LogSessionChangeAsync(sessionId, gmId, "ГМ", "Link", before.JoinLink, joinLink);
-        if (before.MaxPlayers != maxPlayers)
-            await store.LogSessionChangeAsync(sessionId, gmId, "ГМ", "MaxPlayers", before.MaxPlayers?.ToString(), maxPlayers?.ToString());
-    }
-}
-```
-
-Wait, `EnforceSessionOwnershipAsync` returns `groupId` but we need it. Let me check the current AuthorizedSessionService code... We saw earlier it does `await EnforceSessionOwnershipAsync(sessionId, gmId)` then calls `store.UpdateSessionAsync`.
-
-Actually, looking at the compact output from earlier, `AuthorizedSessionService` has `EnforceSessionOwnershipAsync` as a private helper. Let me verify.
-
-From the compact output of AuthorizedSessionService earlier:
-```
-public async Task UpdateSessionForGmAsync(Guid sessionId, long gmId, string title, DateTime scheduledAt, string joinLink, int? maxPlayers)
-{
-    var groupId = await EnforceSessionOwnershipAsync(sessionId, gmId);
-    await store.UpdateSessionAsync(sessionId, groupId, title, scheduledAt, joinLink, maxPlayers);
-}
-```
-
-So it DOES return groupId. Perfect.
-
-But we need actor name. We can use the GM's display name from `GetGroupManagementForGmAsync` or just hardcode "ГМ" for now. Or we can query the player name. For simplicity, use "ГМ" + telegram ID, or query the player display name.
-
-Actually, let's query the GM name from the group or just use telegram ID as identifier. Since this is audit log, having human-readable name is better. We can pass `actorName` to the log method.
-
-Simpler: In `AuthorizedSessionService`, after `EnforceSessionOwnershipAsync`, we already know the group. We can get the GM name from group or just use a generic "ГМ" label. Actually, the telegram ID is sufficient for audit, and the display name can be resolved later in the UI.
-
-Let's just log `actor_telegram_id` and use "ГМ" as actor_name. Or better, query the player display name if needed.
-
-For this plan, let's keep it simple: log with `gmId` as actor_telegram_id and `"ГМ"` as actor_name. The UI can resolve the name.
-
-**Step 2: Instrument all mutating AuthorizedSessionService methods**
-
-Do this for:
-- `UpdateSessionForGmAsync` (Title, Time, Link, MaxPlayers)
-- `RescheduleBatchForGmAsync` (BatchRescheduled)
-- `PromoteWaitlistedPlayerForGmAsync` (WaitlistPromote)
-- `RemovePlayerFromSessionForGmAsync` (PlayerRemoved)
-- `UpdateBatchDetailsForGmAsync` (Title, Link)
-- `UpdateBatchNotificationModeForGmAsync` (maybe skip, internal)
-- `DeleteSessionHandler` in Bot features (Cancelled) — this is in Bot layer, not Web
-
-For Cancelled status, we need to instrument `CancelSessionHandler` in Bot. But the Bot handlers don't use `ISessionStore` directly... they use `SessionService` or direct SQL. Let me check.
-
-Actually, for this plan, focus on Web layer mutations first. Bot layer can be a follow-up.
-
-**Step 3: Commit:** `git add -A && git commit -m "feat(#15): instrument audit logging in AuthorizedSessionService"`
-
----
-
-## Task 4: Web Page - SessionHistory.razor
-
-**Objective:** GM-visible timeline of session changes.
-
-**Files:**
-- Create: `src/GmRelay.Web/Components/Pages/SessionHistory.razor`
-- Modify: `src/GmRelay.Web/Components/Pages/GroupDetails.razor` (add "История" link)
-- Modify: `src/GmRelay.Web/Components/Pages/EditSession.razor` (add "История" link)
-
-**Step 1: Create SessionHistory.razor**
-
-Route: `@page "/session/{SessionId:guid}/history"`
-
-Layout: table with columns: Время, Актор, Тип изменения, Было, Стало.
-
-Colors: use existing CSS variables.
-
-**Step 2: Add navigation links**
-
-In GroupDetails.razor sessions table: add 📜 История column/link.
-In EditSession.razor: add button "📜 История изменений" linking to `/session/{SessionId}/history`.
-
-**Step 3: Commit:** `git add -A && git commit -m "feat(#15): add SessionHistory.razor page with audit timeline"`
-
----
-
-## Task 5: FakeSessionStore + TDD Tests
-
-**Objective:** Test audit logging. RED-GREEN-REFACTOR.
-
-**Files:**
-- Modify: `tests/GmRelay.Bot.Tests/Web/AuthorizedSessionServiceTests.cs`
-
-**Step 1: RED — Write failing test**
-
-```csharp
-[Fact]
-public async Task UpdateSessionForGmAsync_LogsAudit_WhenTitleChanges()
-{
-    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);
-
-    await service.UpdateSessionForGmAsync(sessionId, gmId, "Updated Title", DateTime.UtcNow.AddDays(1), "https://example.test/b", 5);
-
-    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);
-}
-```
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/Web/AuthorizedSessionServiceTests.cs --filter "FullyQualifiedName~LogsAudit" -v n`
-Expected: FAIL (FakeSessionStore doesn't have LogSessionChangeAsync / LogEntries)
-
-**Step 2: GREEN — Add to FakeSessionStore**
-
-Add `List<SessionAuditLogEntry> LogEntries` and implement `LogSessionChangeAsync` / `GetSessionHistoryAsync`.
-
-**Step 3: Refactor — Add more tests**
-
-- No audit when values unchanged
-- Audit for time change
-- Audit for link change
-- Audit for max players change
-- GetSessionHistoryAsync returns entries ordered by time desc
-
-**Step 4: Full suite**
-Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj`
-Expected: all pass
-
-**Step 5: Commit:** `git add -A && git commit -m "test(#15): add audit logging TDD tests"`
-
----
-
-## Task 6: Bump Version & Docs
-
-**Objective:** Update version and documentation.
-
-**Files:**
-- Modify: `Directory.Build.props`
-- Modify: `compose.yaml`
-- Modify: `README.md`
-- Modify: Wiki «Руководство ГМа»
-
-**Step 1: Bump version to 1.10.2**
-
-**Step 2: Update README** — add "📜 История изменений сессии" bullet in Web Dashboard section.
-
-**Step 3: Update wiki** — add subsection «Журнал действий» with description of how to access `/session/{id}/history`, what change types are tracked, and how to read the timeline.
-
-**Step 4: Commit:** `git add -A && git commit -m "docs(#15): bump version to 1.10.2 and add audit log docs"`
-
----
-
-## Task 7: Push & PR
-
-**Step 1:** `git push origin issue-15-session-audit-log`
-
-**Step 2:** Create PR via `mcp_gitea_pull_request_write`
-
-**Step 3:** Wait CI (`mcp_gitea_actions_run_read`)
-
-**Step 4:** Merge PR
-
-**Step 5:** Create tag `v1.10.2` and release
-
----
-
-## Verification Checklist
-
-- [ ] Migration V013 applied successfully
-- [ ] `SessionAuditLogEntry` record defined in `ISessionStore.cs`
-- [ ] `LogSessionChangeAsync` and `GetSessionHistoryAsync` implemented in `SessionService.cs`
-- [ ] `AuthorizedSessionService` logs on value changes only
-- [ ] `SessionHistory.razor` renders timeline for GM
-- [ ] Links from GroupDetails and EditSession pages
-- [ ] `FakeSessionStore` implements audit methods
-- [ ] TDD tests: RED → GREEN → all pass
-- [ ] Full `dotnet test` suite: all pass
-- [ ] Version bumped to 1.10.2
-- [ ] README and wiki updated
-- [ ] CI run success
-- [ ] PR merged to main
-- [ ] Tag `v1.10.2` created
-- [ ] Release published

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

@@ -1,480 +0,0 @@
-# Issue #19: выровнять /newsession с batch-сценарием лендинга — Implementation Plan
-
-> **For Hermes:** Use subagent-driven-development skill to implement this plan task-by-task.
-
-**Goal:** Убедиться, что Telegram UX `/newsession` полностью соответствует batch-сценарию лендинга: мастер одной командой создаёт несколько дат, указывает лимит мест и ссылку, получает единую карточку с действиями. Обеспечить покрытие acceptance criteria регрессионными тестами и устранить найденные расхождения.
-
-**Architecture:** Сценарий уже реализован в `CreateSessionHandler` + `NewSessionCommandParser` + `SessionBatchRenderer`. Основная задача — добавить недостающие тесты на «точный» landing-сценарий (несколько явных дат, не recurring), проверить отсутствие частичных сессий при любых ошибках, и убедиться, что карточка содержит все обещанные элементы.
-
-**Tech Stack:** .NET 10, xUnit, Dapper, Npgsql, Telegram.Bot, Native AOT.
-
----
-
-## Контекст кодовой базы
-
-- `src/GmRelay.Bot/Features/Sessions/CreateSession/CreateSessionHandler.cs` — создание batch, транзакция БД, отправка карточки.
-- `src/GmRelay.Bot/Features/Sessions/CreateSession/NewSessionCommandParser.cs` — парсинг команды: несколько `Время:`, `Мест:`, `Ссылка:`, `Картинка:`, recurring (`Игр:` + `Интервал:`).
-- `src/GmRelay.Shared/Rendering/SessionBatchRenderer.cs` — рендеринг HTML-карточки с кнопками.
-- `src/GmRelay.Shared/Rendering/BatchMessageEditor.cs` — редактирование batch-сообщения (text/photo).
-- `src/GmRelay.Bot/Infrastructure/Telegram/UpdateRouter.cs` — роутинг команд, текст `/help`.
-- `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/NewSessionCommandParserTests.cs` — тесты парсера.
-- `tests/GmRelay.Bot.Tests/Features/Landing/TelegramLandingPromisesSmokeTests.cs` — smoke-тест всего landing-флоу через `FakeTelegramMessenger`.
-- `tests/GmRelay.Bot.Tests/Rendering/SessionBatchRendererTests.cs` — тесты рендерера.
-
----
-
-### Task 1: RED — тест landing-парсинга с несколькими явными датами
-
-**Objective:** Проверить, что парсер корректно обрабатывает точный формат из лендинга: 2+ явных даты, лимит мест, ссылка, без recurring.
-
-**Files:**
-- Modify: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/NewSessionCommandParserTests.cs`
-
-**Step 1: Write failing test**
-
-```csharp
-[Fact]
-public void Parse_ShouldHandleLandingBatchWithMultipleExplicitDates()
-{
-    var nowUtc = new DateTimeOffset(2026, 4, 23, 12, 0, 0, TimeSpan.Zero);
-    var text = """
-        /newsession
-        Название: Landing Batch Game
-        Время: 15.05.2026 19:30
-        Время: 22.05.2026 19:30
-        Мест: 4
-        Ссылка: https://example.test/landing
-        """;
-
-    var result = NewSessionCommandParser.Parse(text, nowUtc);
-
-    Assert.True(result.IsValid);
-    Assert.Equal("Landing Batch Game", result.Title);
-    Assert.Equal("https://example.test/landing", result.Link);
-    Assert.Equal(4, result.MaxPlayers);
-    Assert.Equal(2, result.ScheduledTimes.Count);
-    Assert.Equal(new DateTimeOffset(2026, 5, 15, 16, 30, 0, TimeSpan.Zero), result.ScheduledTimes[0]);
-    Assert.Equal(new DateTimeOffset(2026, 5, 22, 16, 30, 0, TimeSpan.Zero), result.ScheduledTimes[1]);
-    Assert.Empty(result.PastTimeInputs);
-    Assert.Empty(result.InvalidTimeInputs);
-    Assert.Empty(result.InvalidSeatLimitInputs);
-    Assert.Empty(result.InvalidRecurringInputs);
-}
-```
-
-**Step 2: Run test to verify failure**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/ --filter "FullyQualifiedName~Parse_ShouldHandleLandingBatchWithMultipleExplicitDates" -v n`
-
-Expected: PASS (функциональность уже реализована, но теста не было). Если FAIL — исправить парсер перед продолжением.
-
-**Step 3: Commit**
-
-```bash
-git add tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/NewSessionCommandParserTests.cs
-git commit -m "test(#19): landing batch parser test with multiple explicit dates"
-```
-
----
-
-### Task 2: RED — тест рендеринга landing-карточки
-
-**Objective:** Проверить, что `SessionBatchRenderer` для landing-сценария выводит название, все даты, лимит, заполненность и кнопки записи/выхода.
-
-**Files:**
-- Modify: `tests/GmRelay.Bot.Tests/Rendering/SessionBatchRendererTests.cs`
-
-**Step 1: Write failing test**
-
-```csharp
-[Fact]
-public void Render_ShouldProduceLandingBatchCardWithAllRequiredElements()
-{
-    var sessionId1 = Guid.NewGuid();
-    var sessionId2 = Guid.NewGuid();
-    var sessions = new[]
-    {
-        new SessionBatchDto(sessionId1, new DateTime(2026, 5, 15, 16, 30, 0, DateTimeKind.Utc), SessionStatus.Planned, 4),
-        new SessionBatchDto(sessionId2, new DateTime(2026, 5, 22, 16, 30, 0, DateTimeKind.Utc), SessionStatus.Planned, 4)
-    };
-    var participants = new[]
-    {
-        new ParticipantBatchDto(sessionId1, "Alice", "alice", ParticipantRegistrationStatus.Active),
-        new ParticipantBatchDto(sessionId1, "Bob", null, ParticipantRegistrationStatus.Active),
-        new ParticipantBatchDto(sessionId2, "Charlie", "charlie", ParticipantRegistrationStatus.Waitlisted)
-    };
-
-    var result = SessionBatchRenderer.Render("Landing Batch Game", sessions, participants);
-    var text = result.Text;
-    var buttons = result.Markup.InlineKeyboard.SelectMany(row => row).ToList();
-
-    Assert.Contains("Landing Batch Game", text);
-    Assert.Contains("15 мая 2026, 19:30", text);
-    Assert.Contains("22 мая 2026, 19:30", text);
-    Assert.Contains("Места: 2/4", text);
-    Assert.Contains("Места: 0/4", text);
-    Assert.Contains("@alice", text);
-    Assert.Contains("Bob", text);
-    Assert.Contains("Лист ожидания (1)", text);
-    Assert.Contains("@charlie", text);
-
-    Assert.Equal(4, buttons.Count);
-    Assert.Contains($"join_session:{sessionId1}", buttons.Select(b => b.CallbackData));
-    Assert.Contains($"leave_session:{sessionId1}", buttons.Select(b => b.CallbackData));
-    Assert.Contains($"join_session:{sessionId2}", buttons.Select(b => b.CallbackData));
-    Assert.Contains($"leave_session:{sessionId2}", buttons.Select(b => b.CallbackData));
-}
-```
-
-**Step 2: Run test to verify failure**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/ --filter "FullyQualifiedName~Render_ShouldProduceLandingBatchCardWithAllRequiredElements" -v n`
-
-Expected: PASS (рендерер уже реализован, тест отсутствовал).
-
-**Step 3: Commit**
-
-```bash
-git add tests/GmRelay.Bot.Tests/Rendering/SessionBatchRendererTests.cs
-git commit -m "test(#19): landing batch renderer card elements test"
-```
-
----
-
-### Task 3: RED — тест «ошибки ввода не создают частичных сессий»
-
-**Objective:** Убедиться, что при невалидном вводе `CreateSessionHandler` не создаёт ни одной записи в БД и не публикует карточку.
-
-**Files:**
-- Create: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/CreateSessionHandlerTests.cs`
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/CreateSessionHandler.cs` (если найдена уязвимость)
-
-**Step 1: Write failing test**
-
-```csharp
-using GmRelay.Bot.Features.Sessions.CreateSession;
-using Npgsql;
-using Telegram.Bot;
-using Microsoft.Extensions.Logging.Abstractions;
-
-namespace GmRelay.Bot.Tests.Features.Sessions.CreateSession;
-
-public sealed class CreateSessionHandlerTests
-{
-    // Примечание: полноценный интеграционный тест с реальной БД требует TestContainer.
-    // Для Native AOT проекта используем подход с in-memory фейком через рефакторинг хендлера.
-    // Ниже — тест-спецификация, которую реализуем через FakeDataSource или рефакторинг.
-}
-```
-
-Поскольку `CreateSessionHandler` напрямую зависит от `NpgsqlDataSource` и `ITelegramBotClient`, для unit-тестирования нужно либо:
-а) использовать интеграционный тест с PostgreSQL (TestContainers), либо
-б) рефакторить хендлер, выделив `ISessionRepository`.
-
-**Рекомендуемый подход (YAGNI):** добавить интеграционный тест в smoke-стиле через `FakeTelegramMessenger`, дополнив `TelegramLandingSmokeScenario` сценарием «invalid command does not publish anything».
-
-**Step 1 (реализация):** Дописать тест в `TelegramLandingPromisesSmokeTests.cs`:
-
-```csharp
-[Fact]
-public void Smoke_InvalidNewSession_ShouldNotPublishAnySessions()
-{
-    var nowUtc = new DateTimeOffset(2026, 5, 1, 12, 0, 0, TimeSpan.Zero);
-    var invalidText = """
-        /newsession
-        Название: Bad Game
-        Время: 01.01.2020 19:30
-        """; // нет ссылки
-
-    var parseResult = NewSessionCommandParser.Parse(invalidText, nowUtc);
-
-    Assert.False(parseResult.IsValid);
-    Assert.Empty(parseResult.ScheduledTimes);
-    // Убеждаемся, что smoke-сценарий не может быть опубликован
-    Assert.Throws<InvalidOperationException>(() =>
-        TelegramLandingSmokeScenario.Publish(parseResult, SessionNotificationMode.GroupAndDirect));
-}
-```
-
-В `TelegramLandingSmokeScenario.Publish` добавить guard:
-```csharp
-if (!parseResult.IsValid)
-    throw new InvalidOperationException("Cannot publish invalid parse result");
-```
-
-**Step 2: Run test to verify failure**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/ --filter "FullyQualifiedName~Smoke_InvalidNewSession_ShouldNotPublishAnySessions" -v n`
-
-Expected: FAIL — guard ещё не добавлен.
-
-**Step 3: Write minimal implementation**
-
-Добавить guard в `TelegramLandingSmokeScenario.Publish`:
-```csharp
-if (!parseResult.IsValid)
-    throw new InvalidOperationException("Cannot publish invalid parse result");
-```
-
-**Step 4: Run test to verify pass**
-
-Expected: PASS.
-
-**Step 5: Commit**
-
-```bash
-git add tests/GmRelay.Bot.Tests/Features/Landing/TelegramLandingPromisesSmokeTests.cs
-git add src/GmRelay.Bot/... # если были изменения
-# (файл CreateSessionHandler.cs не трогаем — валидация происходит ДО транзакции)
-git commit -m "test(#19): ensure invalid parse does not publish partial sessions"
-```
-
----
-
-### Task 4: RED — тест atomicity при сбое отправки batch-сообщения
-
-**Objective:** В `CreateSessionHandler` `batch_message_id` обновляется ПОСЛЕ `transaction.Commit()`. Если отправка сообщения в Telegram падает, сессии созданы, но `batch_message_id` не записан — игроки не увидят карточку. Нужно либо доказать, что это обработано, либо исправить.
-
-**Files:**
-- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/CreateSessionHandler.cs`
-
-**Step 1: Анализ кода**
-
-Текущий порядок в `CreateSessionHandler`:
-1. Валидация (до транзакции) ✓
-2. `BEGIN TRANSACTION`
-3. INSERT players, groups, sessions
-4. `COMMIT`
-5. `SessionBatchRenderer.Render`
-6. `botClient.SendMessage/SendPhoto`
-7. `UPDATE sessions SET batch_message_id = ...` (вне транзакции!)
-
-Если шаг 6 падает — сессии «висят» без published message. Это частичное создание.
-
-**Step 2: Write minimal fix**
-
-Обернуть отправку сообщения и обновление `batch_message_id` в retry-loop с fallback. Если после N попыток не удалось — отправить GM уведомление об ошибке и оставить сессии (не удалять, чтобы не терять данные), но сделать так, чтобы `batch_message_id` обновлялся только при успешной отправке.
-
-```csharp
-// Внутри CreateSessionHandler, после Commit:
-Message? batchMessage = null;
-var sendAttempts = 0;
-const int maxAttempts = 3;
-Exception? lastSendException = null;
-
-while (batchMessage is null && sendAttempts < maxAttempts)
-{
-    sendAttempts++;
-    try
-    {
-        batchMessage = await SendBatchMessageAsync(...); // extracted method
-    }
-    catch (Exception ex)
-    {
-        lastSendException = ex;
-        logger.LogWarning(ex, "Attempt {Attempt} failed to send batch message for {BatchId}", sendAttempts, batchId);
-        if (sendAttempts < maxAttempts)
-            await Task.Delay(TimeSpan.FromSeconds(1), cancellationToken);
-    }
-}
-
-if (batchMessage is not null)
-{
-    await connection.ExecuteAsync(
-        "UPDATE sessions SET batch_message_id = @MsgId WHERE batch_id = @BatchId",
-        new { MsgId = batchMessage.MessageId, BatchId = batchId });
-}
-else
-{
-    logger.LogError(lastSendException, "Failed to send batch message for {BatchId} after {MaxAttempts} attempts", batchId, maxAttempts);
-    await botClient.SendMessage(
-        chatId,
-        $"⚠️ Сессии созданы, но не удалось опубликовать карточку. Пожалуйста, используйте /listsessions.\n\nОшибка: {lastSendException?.Message}",
-        cancellationToken: cancellationToken);
-}
-```
-
-**Step 3: Extract helper**
-
-Выделить метод `SendBatchMessageAsync` из текущего inline-кода отправки (строки 117–176 в текущем файле), чтобы логика была читаемой и тестируемой.
-
-**Step 4: Run tests**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/ -v n`
-
-Expected: все существующие тесты PASS, новая логика не ломает smoke-тест (т.к. smoke-тест не использует реальный `CreateSessionHandler`).
-
-**Step 5: Commit**
-
-```bash
-git add src/GmRelay.Bot/Features/Sessions/CreateSession/CreateSessionHandler.cs
-git commit -m "fix(#19): retry batch message send and prevent orphaned sessions without batch_message_id"
-```
-
----
-
-### Task 5: RED — smoke-тест полного landing-сценария с явными датами
-
-**Objective:** Дополнить `TelegramLandingPromisesSmokeTests` полным сквозным сценарием: парсинг → публикация → запись → выход → проверка карточки.
-
-**Files:**
-- Modify: `tests/GmRelay.Bot.Tests/Features/Landing/TelegramLandingPromisesSmokeTests.cs`
-
-**Step 1: Write failing test**
-
-```csharp
-[Fact]
-public void Smoke_LandingExplicitDatesBatch_ShouldSupportFullLifecycle()
-{
-    var nowUtc = new DateTimeOffset(2026, 5, 1, 12, 0, 0, TimeSpan.Zero);
-    var text = """
-        /newsession
-        Название: Landing Explicit Batch
-        Время: 15.05.2026 19:30
-        Время: 22.05.2026 19:30
-        Мест: 3
-        Ссылка: https://example.test/explicit
-        """;
-
-    var parseResult = NewSessionCommandParser.Parse(text, nowUtc);
-    Assert.True(parseResult.IsValid);
-    Assert.Equal(2, parseResult.ScheduledTimes.Count);
-    Assert.Equal(3, parseResult.MaxPlayers);
-
-    var scenario = TelegramLandingSmokeScenario.Publish(parseResult, SessionNotificationMode.GroupAndDirect);
-    Assert.Contains("Landing Explicit Batch", scenario.LastMessage.Text);
-    Assert.Contains("15 мая 2026, 19:30", scenario.LastMessage.Text);
-    Assert.Contains("22 мая 2026, 19:30", scenario.LastMessage.Text);
-    Assert.Contains("Места: 0/3", scenario.LastMessage.Text);
-
-    var callbacks = CallbackData(scenario.LastMessage.Markup);
-    Assert.Equal(4, callbacks.Count); // join+leave для каждой из 2 сессий
-
-    var firstSessionId = scenario.Sessions[0].Id;
-    var alice = scenario.Join(firstSessionId, 1001, "Alice", "alice");
-    var bob = scenario.Join(firstSessionId, 1002, "Bob", "bob");
-    var carol = scenario.Join(firstSessionId, 1003, "Carol", "carol");
-
-    Assert.Equal(ParticipantRegistrationStatus.Active, scenario.RegistrationStatus(firstSessionId, alice));
-    Assert.Equal(ParticipantRegistrationStatus.Active, scenario.RegistrationStatus(firstSessionId, bob));
-    Assert.Equal(ParticipantRegistrationStatus.Waitlisted, scenario.RegistrationStatus(firstSessionId, carol));
-    Assert.Contains("Места: 2/3", scenario.LastMessage.Text);
-    Assert.Contains("@alice", scenario.LastMessage.Text);
-    Assert.Contains("@bob", scenario.LastMessage.Text);
-    Assert.Contains("@carol", scenario.LastMessage.Text);
-
-    scenario.Leave(firstSessionId, alice);
-    Assert.False(scenario.HasParticipant(firstSessionId, alice));
-    Assert.Equal(ParticipantRegistrationStatus.Active, scenario.RegistrationStatus(firstSessionId, carol));
-    Assert.DoesNotContain("@alice", scenario.LastMessage.Text);
-    Assert.Contains("@carol", scenario.LastMessage.Text);
-}
-```
-
-**Step 2: Run test to verify failure**
-
-Run: `dotnet test tests/GmRelay.Bot.Tests/ --filter "FullyQualifiedName~Smoke_LandingExplicitDatesBatch_ShouldSupportFullLifecycle" -v n`
-
-Expected: PASS (функциональность уже существует, тест добавляет регрессионное покрытие).
-
-**Step 3: Commit**
-
-```bash
-git add tests/GmRelay.Bot.Tests/Features/Landing/TelegramLandingPromisesSmokeTests.cs
-git commit -m "test(#19): full lifecycle smoke test for explicit-dates landing batch"
-```
-
----
-
-### Task 6: Проверка и обновление `/help` текста
-
-**Objective:** Убедиться, что текст `/help` точно отражает landing-формат и упоминает batch-сценарий.
-
-**Files:**
-- Modify: `src/GmRelay.Bot/Infrastructure/Telegram/UpdateRouter.cs`
-
-**Step 1: Read current `/help` text**
-
-Текущий `/help` уже содержит:
-```
-/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 регулярного расписания можно указать одну дату:
-Игр: 4
-Интервал: 7
-```
-
-**Step 2: Verify alignment**
-
-- Формат совпадает с лендингом ✓
-- Упоминается `Мест:` ✓
-- Упоминается несколько `Время:` ✓
-- Упоминается `Ссылка:` ✓
-
-Никаких изменений не требуется. Если тестировщик считает, что help недостаточно явно описывает batch-сценарий — добавить заголовок:
-```
-<b>Создать набор сессий (batch):</b>
-```
-
-**Step 3: Commit (если изменения были)**
-
-```bash
-git add src/GmRelay.Bot/Infrastructure/Telegram/UpdateRouter.cs
-git commit -m "docs(#19): clarify batch scenario in /help text"
-```
-
----
-
-### Task 7: Финальный прогон и cleanup
-
-**Objective:** Убедиться, что все тесты проходят, нет warnings, и план соответствует acceptance criteria.
-
-**Files:**
-- Все изменённые файлы
-
-**Step 1: Run full test suite**
-
-```bash
-dotnet test tests/GmRelay.Bot.Tests/ -v n
-```
-
-Expected: все тесты PASS.
-
-**Step 2: Verify checklist**
-
-- [ ] `Parse_ShouldHandleLandingBatchWithMultipleExplicitDates` — PASS
-- [ ] `Render_ShouldProduceLandingBatchCardWithAllRequiredElements` — PASS
-- [ ] `Smoke_InvalidNewSession_ShouldNotPublishAnySessions` — PASS
-- [ ] `Smoke_LandingExplicitDatesBatch_ShouldSupportFullLifecycle` — PASS
-- [ ] Все существующие тесты — PASS
-- [ ] `CreateSessionHandler` обрабатывает сбой отправки batch-сообщения (retry + fallback)
-- [ ] `/help` текст соответствует landing-формату
-- [ ] Никаких новых warnings при сборке
-
-**Step 3: Commit финальный**
-
-```bash
-git add -A
-git commit -m "feat(#19): align /newsession with landing batch scenario — tests + atomicity fix"
-```
-
----
-
-## Acceptance Criteria Verification
-
-| Критерий | Статус | Покрытие |
-|---|---|---|
-| Мастер может создать batch из нескольких дат | ✅ Реализовано | Task 1, Task 5 |
-| Карточка содержит название, даты, лимит, заполненность, действия | ✅ Реализовано | Task 2, Task 5 |
-| Ошибки ввода не создают частичных сессий | ✅ Реализовано (валидация до транзакции) | Task 3 |
-| Сбой публикации карточки не оставляет «висячие» сессии без `batch_message_id` | 🔄 Фиксится | Task 4 |
-
-## Execution Handoff
-
-Plan complete and saved to `.hermes/plans/gmrelay-issue-19.md`. Ready to execute using subagent-driven-development — dispatch a fresh subagent per task with two-stage review (spec compliance then code quality). Shall I proceed?

Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <Version>1.15.1</Version>
+    <Version>2.1.0</Version>
     <TargetFramework>net10.0</TargetFramework>
     <LangVersion>preview</LangVersion>
     <Nullable>enable</Nullable>

README.md

@@ -4,7 +4,7 @@
 
 Проект разработан с упором на производительность, архитектуру Vertical Slice, Native AOT (для бота) и удобство развертывания с использованием .NET Aspire.
 
-**Текущая версия:** `v1.15.0`.
+**Текущая версия:** `v2.0.1`.
 
 ---
 

compose.yaml

@@ -49,7 +49,7 @@ services:
         crond -f
 
   bot:
-    image: git.codeanddice.ru/toutsu/gmrelay-bot:1.15.1
+    image: git.codeanddice.ru/toutsu/gmrelay-bot:2.1.0
     restart: always
     depends_on:
       db:
@@ -60,9 +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:1.15.1
+    image: git.codeanddice.ru/toutsu/gmrelay-web:2.1.0
     restart: always
     depends_on:
       db:
@@ -78,6 +83,11 @@ 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:

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.

src/GmRelay.Bot/Dockerfile

@@ -30,9 +30,15 @@ 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

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/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;
@@ -22,7 +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)
 {
@@ -52,13 +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;
         }
 
@@ -105,27 +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(
+            await messenger.SendGroupMessageAsync(
-                chatId: command.ChatId,
+                TelegramPlatformIds.Group(command.ChatId, command.MessageThreadId),
-                messageThreadId: command.MessageThreadId,
+                $"❌ <b>Внимание!</b> Сессия \"{System.Net.WebUtility.HtmlEncode(session.Title)}\" отменена.",
-                text: $"❌ <b>Внимание!</b> Сессия \"{System.Net.WebUtility.HtmlEncode(session.Title)}\" отменена.",
+                ct);
-                parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
-                cancellationToken: ct);
 
             var mode = SessionNotificationModeExtensions.FromDatabaseValue(session.NotificationMode);
             if (mode.ShouldSendDirectMessages())
@@ -141,7 +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 },

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;
             }
 
@@ -109,7 +113,7 @@ 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;
             }
 
@@ -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;
             }
 
@@ -185,14 +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
@@ -201,7 +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)
         {
@@ -214,7 +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;
             }
 
@@ -165,17 +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)
         {
@@ -188,7 +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

@@ -1,11 +1,11 @@
 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;
-using Telegram.Bot.Types.ReplyMarkups;
 
 namespace GmRelay.Bot.Features.Sessions.ExportCalendar;
 
@@ -13,7 +13,7 @@ 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)
@@ -34,10 +34,10 @@ public sealed class ExportCalendarHandler(
 
         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;
         }
 
@@ -63,9 +63,7 @@ public sealed class ExportCalendarHandler(
         sb.AppendLine("END:VCALENDAR");
 
         var bytes = Encoding.UTF8.GetBytes(sb.ToString());
-        using var stream = new MemoryStream(bytes);
 
-        var inputFile = InputFile.FromStream(stream, "schedule.ics");
 
         // Create calendar subscription
         string? subscriptionUrl = null;
@@ -93,20 +91,23 @@ public sealed class ExportCalendarHandler(
             }
         }
 
-        var replyMarkup = subscriptionUrl is not null
+        var actions = subscriptionUrl is not null
-            ? new InlineKeyboardMarkup(new[]
+            ? new[]
             {
-                new[] { InlineKeyboardButton.WithUrl("🔗 Подписаться на календарь", subscriptionUrl) }
+                new PlatformMessageAction(
-            })
+                    "calendar-subscription",
-            : null;
+                    "🔗 Подписаться на календарь",
+                    subscriptionUrl)
+            }
+            : Array.Empty<PlatformMessageAction>();
 
-        await botClient.SendDocument(
+        await messenger.SendCalendarFileAsync(
-             chatId: message.Chat.Id,
+            new PlatformCalendarFile(
-             document: inputFile,
+                TelegramPlatformIds.Group(message.Chat.Id, message.MessageThreadId),
-             caption: "📅 <b>Ваш календарь игр!</b>\nОткройте файл на устройстве, чтобы добавить события в свой календарь.",
+                "schedule.ics",
-             parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
+                bytes,
-             replyMarkup: replyMarkup,
+                "📅 <b>Ваш календарь игр!</b>\nОткройте файл на устройстве, чтобы добавить события в свой календарь.",
-             messageThreadId: message.MessageThreadId,
+                actions),
-             cancellationToken: cancellationToken);
+            cancellationToken);
     }
 }

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;
@@ -33,6 +34,7 @@ internal sealed record VoteParticipantDto(
 public sealed class HandleRescheduleTimeInputHandler(
     NpgsqlDataSource dataSource,
     ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     DirectSessionNotificationSender directSender,
     ILogger<HandleRescheduleTimeInputHandler> logger)
 {
@@ -83,12 +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),
-                messageThreadId: proposal.ThreadId,
+                $"⚠️ {parseError}\n\nИспользуйте формат:\n<code>25.04.2026 19:30\n26.04.2026 18:00\nДедлайн: 25.04.2026 12:00</code>",
-                text: $"⚠️ {parseError}\n\nИспользуйте формат:\n<code>25.04.2026 19:30\n26.04.2026 18:00\nДедлайн: 25.04.2026 12:00</code>",
+                ct);
-                parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
-                cancellationToken: ct);
             return true;
         }
 
@@ -243,12 +243,10 @@ public sealed class HandleRescheduleTimeInputHandler(
 
         await transaction.CommitAsync(ct);
 
-        await bot.SendMessage(
+        await messenger.SendGroupMessageAsync(
-            chatId: chatId,
+            TelegramPlatformIds.Group(chatId, proposal.ThreadId),
-            messageThreadId: proposal.ThreadId,
+            $"✅ 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>",
-            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>",
+            ct);
-            parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
-            cancellationToken: ct);
 
         // Re-render batch message with updated time
         await TryUpdateBatchMessage(proposal, ct);
@@ -383,14 +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;
 
@@ -28,7 +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)
@@ -53,14 +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;
         }
 
@@ -76,8 +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;
         }
 
@@ -92,23 +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",
-            messageThreadId: command.MessageThreadId,
+            new[]
-            text: $"""
+            {
-                ⏰ 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

@@ -2,6 +2,7 @@ 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;
@@ -26,6 +27,7 @@ internal sealed record DueRescheduleProposalDto(
 public sealed class RescheduleVotingDeadlineService(
     NpgsqlDataSource dataSource,
     ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     DirectSessionNotificationSender directSender,
     ISystemClock clock,
     ILogger<RescheduleVotingDeadlineService> logger) : BackgroundService
@@ -312,24 +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),
-                    messageThreadId: proposal.ThreadId,
+                    $"📣 Расписание обновлено после голосования за перенос сессии «{System.Net.WebUtility.HtmlEncode(proposal.Title)}».",
-                    text: $"📣 Расписание обновлено после голосования за перенос сессии «{System.Net.WebUtility.HtmlEncode(proposal.Title)}».",
+                    ct);
-                    parseMode: ParseMode.Html,
-                    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/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/Migrations/V012__add_attendance_stats.sql

@@ -47,7 +47,7 @@ BEGIN
     SELECT
         pt.player_id,
         p.display_name,
-        p.telegram_username,
+        COALESCE(p.external_username, p.telegram_username) AS telegram_username,
         pt.total_sessions,
         pt.confirmed_count,
         pt.declined_count,

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;
 
@@ -49,6 +51,7 @@ 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>();
@@ -85,6 +88,9 @@ builder.Services.AddSingleton<ISessionTriggerStore, DbSessionTriggerStore>();
 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.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.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

@@ -56,7 +56,7 @@
                     </button>
                 </form>
 
-                <div class="nav-version">v1.15.1</div>
+                <div class="nav-version">v2.1.0</div>
             </div>
         </Authorized>
         <NotAuthorized>

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

@@ -23,12 +23,11 @@
 }
 
 .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 {
@@ -87,9 +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 {
@@ -145,7 +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);

src/GmRelay.Web/Dockerfile

@@ -18,7 +18,7 @@ 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 --no-install-recommends 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

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"));
@@ -83,6 +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) =>
 {

src/GmRelay.Web/Services/SessionService.cs

@@ -242,11 +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
             {

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/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

@@ -43,18 +43,18 @@ public sealed class TelegramTopicIntegrationSmokeTests
         Assert.Contains("messageThreadId: session.ThreadId", rsvpHandler, StringComparison.Ordinal);
 
         Assert.Contains("int? MessageThreadId", cancelHandler, StringComparison.Ordinal);
-        Assert.Contains("messageThreadId: command.MessageThreadId", cancelHandler, StringComparison.Ordinal);
+        Assert.Contains("TelegramPlatformIds.Group(command.ChatId, command.MessageThreadId)", cancelHandler, StringComparison.Ordinal);
 
         Assert.Contains("int? MessageThreadId", initiateRescheduleHandler, StringComparison.Ordinal);
-        Assert.Contains("messageThreadId: command.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("messageThreadId: proposal.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("messageThreadId: proposal.ThreadId", rescheduleDeadlineService, StringComparison.Ordinal);
+        Assert.Contains("TelegramPlatformIds.Group(proposal.TelegramChatId, proposal.ThreadId)", rescheduleDeadlineService, StringComparison.Ordinal);
     }
 
     private static async Task<string> ReadRepositoryFileAsync(string relativePath)

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/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);
+    }
+}

tests/GmRelay.Bot.Tests/packages.lock.json

@@ -8,6 +8,16 @@
         "resolved": "6.0.4",
         "contentHash": "lkhqpF8Pu2Y7IiN7OntbsTtdbpR1syMsm2F3IgX6ootA4ffRqWL5jF7XipHuZQTdVuWG/gVAAcf8mjk8Tz0xPg=="
       },
+      "Microsoft.AspNetCore.Mvc.Testing": {
+        "type": "Direct",
+        "requested": "[10.0.5, )",
+        "resolved": "10.0.5",
+        "contentHash": "MfacYQ7jNzj6073YobyoFfXpNmGqrV1UCywTM339DOcYpfalcM4K4heFjV5k3dDkKkWOGWO/DV3hdmVRqFkIxA==",
+        "dependencies": {
+          "Microsoft.AspNetCore.TestHost": "10.0.5",
+          "Microsoft.Extensions.DependencyModel": "10.0.5"
+        }
+      },
       "Microsoft.NET.Test.Sdk": {
         "type": "Direct",
         "requested": "[17.14.1, )",
@@ -47,14 +57,6 @@
         "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",
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