refactor: add platform messenger contracts

Introduce platform-neutral PlatformKind, PlatformUser, PlatformGroup, and IPlatformMessenger contracts in GmRelay.Shared.

Route Telegram session schedule updates, direct notifications, interaction replies, and calendar export through TelegramPlatformMessenger while preserving existing Telegram behavior.

Bump version -> 2.0.1

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(
-                bot,
-                chatId: command.ChatId,
-                messageId: session.BatchMessageId ?? command.MessageId,
-                text: renderResult.Text,
-                replyMarkup: renderResult.Markup,
+            var messageId = session.BatchMessageId ?? command.MessageId;
+            await messenger.UpdateScheduleAsync(
+                new PlatformScheduleMessage(
+                    TelegramPlatformIds.Group(command.ChatId, command.MessageThreadId),
+                    view,
+                    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(
-                chatId: command.ChatId,
-                messageThreadId: command.MessageThreadId,
-                text: $"❌ <b>Внимание!</b> Сессия \"{System.Net.WebUtility.HtmlEncode(session.Title)}\" отменена.",
-                parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
-                cancellationToken: ct);
+            await messenger.SendGroupMessageAsync(
+                TelegramPlatformIds.Group(command.ChatId, command.MessageThreadId),
+                $"❌ <b>Внимание!</b> Сессия \"{System.Net.WebUtility.HtmlEncode(session.Title)}\" отменена.",
+                ct);
 
             var mode = SessionNotificationModeExtensions.FromDatabaseValue(session.NotificationMode);
             if (mode.ShouldSendDirectMessages())
@@ -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);
 }