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/Notifications/DirectSessionNotificationSender.cs

@@ -1,12 +1,12 @@
-using Telegram.Bot;
-using Telegram.Bot.Types.Enums;
+using GmRelay.Bot.Infrastructure.Telegram;
+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(
-                    chatId: recipient.TelegramId,
-                    text: htmlText,
-                    parseMode: ParseMode.Html,
-                    cancellationToken: ct);
+                await messenger.SendPrivateMessageAsync(
+                    new PlatformPrivateMessage(
+                        TelegramPlatformIds.User(recipient.TelegramId, recipient.DisplayName),
+                        htmlText),
+                    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(
-                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);
 }

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)
@@ -59,7 +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;
             }
 
@@ -80,7 +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;
             }
 
@@ -114,7 +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;
             }
 
@@ -143,20 +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 BatchMessageEditor.EditBatchMessageAsync(
-                bot,
-                chatId: command.ChatId,
-                messageId: command.MessageId,
-                text: renderResult.Text,
-                replyMarkup: renderResult.Markup,
+            await messenger.UpdateScheduleAsync(
+                new PlatformScheduleMessage(
+                    TelegramPlatformIds.Group(command.ChatId),
+                    view,
+                    TelegramPlatformIds.Message(command.ChatId, threadId: null, command.MessageId)),
                 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)
         {
@@ -169,7 +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 BatchMessageEditor.EditBatchMessageAsync(
-                bot,
-                chatId: command.ChatId,
-                messageId: command.MessageId,
-                text: renderResult.Text,
-                replyMarkup: renderResult.Markup,
+            await messenger.UpdateScheduleAsync(
+                new PlatformScheduleMessage(
+                    TelegramPlatformIds.Group(command.ChatId),
+                    view,
+                    TelegramPlatformIds.Message(command.ChatId, threadId: null, command.MessageId)),
                 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);
-
-            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),
+                    view,
+                    TelegramPlatformIds.Message(command.ChatId, threadId: null, messageId)),
                 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(
-                chatId: message.Chat.Id,
-                text: "📭 У этой группы нет запланированных сессий для экспорта.",
-                cancellationToken: cancellationToken);
+            await messenger.SendGroupMessageAsync(
+                TelegramPlatformIds.Group(message.Chat.Id, message.MessageThreadId),
+                "📭 У этой группы нет запланированных сессий для экспорта.",
+                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
-            ? new InlineKeyboardMarkup(new[]
+        var actions = subscriptionUrl is not null
+            ? new[]
             {
-                new[] { InlineKeyboardButton.WithUrl("🔗 Подписаться на календарь", subscriptionUrl) }
-            })
-            : null;
+                new PlatformMessageAction(
+                    "calendar-subscription",
+                    "🔗 Подписаться на календарь",
+                    subscriptionUrl)
+            }
+            : Array.Empty<PlatformMessageAction>();
 
-        await botClient.SendDocument(
-             chatId: message.Chat.Id,
-             document: inputFile,
-             caption: "📅 <b>Ваш календарь игр!</b>\nОткройте файл на устройстве, чтобы добавить события в свой календарь.",
-             parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
-             replyMarkup: replyMarkup,
-             messageThreadId: message.MessageThreadId,
-             cancellationToken: cancellationToken);
+        await messenger.SendCalendarFileAsync(
+            new PlatformCalendarFile(
+                TelegramPlatformIds.Group(message.Chat.Id, message.MessageThreadId),
+                "schedule.ics",
+                bytes,
+                "📅 <b>Ваш календарь игр!</b>\nОткройте файл на устройстве, чтобы добавить события в свой календарь.",
+                actions),
+            cancellationToken);
     }
 }

src/GmRelay.Bot/Features/Sessions/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(
-                chatId: chatId,
-                messageThreadId: proposal.ThreadId,
-                text: $"⚠️ {parseError}\n\nИспользуйте формат:\n<code>25.04.2026 19:30\n26.04.2026 18:00\nДедлайн: 25.04.2026 12:00</code>",
-                parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
-                cancellationToken: ct);
+            await messenger.SendGroupMessageAsync(
+                TelegramPlatformIds.Group(chatId, 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>",
+                ct);
             return true;
         }
 
@@ -243,12 +243,10 @@ public sealed class HandleRescheduleTimeInputHandler(
 
         await transaction.CommitAsync(ct);
 
-        await bot.SendMessage(
-            chatId: chatId,
-            messageThreadId: proposal.ThreadId,
-            text: $"✅ Сессия «{proposal.Title}» перенесена!\n\n📅 Новое время: <b>{newTime.ToOffset(TimeSpan.FromHours(3)).ToString("d MMMM yyyy, HH:mm", System.Globalization.CultureInfo.GetCultureInfo("ru-RU"))}</b> (МСК)\n\n<i>Участников нет — голосование не требуется.</i>",
-            parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
-            cancellationToken: ct);
+        await messenger.SendGroupMessageAsync(
+            TelegramPlatformIds.Group(chatId, 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>",
+            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(
-                    bot,
-                    chatId: proposal.TelegramChatId,
-                    messageId: proposal.BatchMessageId.Value,
-                    text: renderResult.Text,
-                    replyMarkup: renderResult.Markup,
+                await messenger.UpdateScheduleAsync(
+                    new PlatformScheduleMessage(
+                        TelegramPlatformIds.Group(proposal.TelegramChatId, proposal.ThreadId),
+                        view,
+                        TelegramPlatformIds.Message(proposal.TelegramChatId, proposal.ThreadId, proposal.BatchMessageId.Value)),
                     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(
-                command.CallbackQueryId,
-                "Голосование уже завершено или не найдено.",
-                cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, "Голосование уже завершено или не найдено.", ct);
             return;
         }
 
         if (proposal.VotingDeadlineAt <= DateTimeOffset.UtcNow)
         {
-            await bot.AnswerCallbackQuery(
-                command.CallbackQueryId,
-                "Дедлайн уже прошёл. Результаты скоро будут применены.",
-                showAlert: true,
-                cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, "Дедлайн уже прошёл. Результаты скоро будут применены.", ct, showAlert: true);
             return;
         }
 
@@ -78,10 +73,7 @@ public sealed class HandleRescheduleVoteHandler(
 
         if (playerId is null)
         {
-            await bot.AnswerCallbackQuery(
-                command.CallbackQueryId,
-                "Вы не являетесь участником этой сессии.",
-                cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, "Вы не являетесь участником этой сессии.", 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(
-            command.CallbackQueryId,
-            "Ваш голос учтён. До дедлайна его можно изменить.",
-            cancellationToken: ct);
+        await AnswerAsync(command.CallbackQueryId, "Ваш голос учтён. До дедлайна его можно изменить.", 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,
-                "Только owner или co-GM может переносить сессию.", showAlert: true, cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, "Только owner или co-GM может переносить сессию.", ct, showAlert: true);
             return;
         }
 
@@ -76,8 +76,7 @@ public sealed class InitiateRescheduleHandler(
 
         if (hasActive)
         {
-            await bot.AnswerCallbackQuery(command.CallbackQueryId,
-                "Уже есть активный запрос на перенос этой сессии.", showAlert: true, cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, "Уже есть активный запрос на перенос этой сессии.", ct, showAlert: true);
             return;
         }
 
@@ -92,23 +91,23 @@ 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,
-            "Введите 2-3 варианта времени и дедлайн голосования.", cancellationToken: ct);
+        await AnswerAsync(command.CallbackQueryId, "Введите 2-3 варианта времени и дедлайн голосования.", ct);
 
-        await bot.SendMessage(
-            chatId: command.ChatId,
-            messageThreadId: command.MessageThreadId,
-            text: $"""
-                ⏰ 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.
-                """,
-            parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
-            cancellationToken: ct);
+        await messenger.SendGroupMessageAsync(
+            TelegramPlatformIds.Group(command.ChatId, command.MessageThreadId),
+            $"""
+                            ⏰ 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.
+                            """,
+            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(
-                    bot,
-                    chatId: proposal.TelegramChatId,
-                    messageId: proposal.BatchMessageId.Value,
-                    text: renderResult.Text,
-                    replyMarkup: renderResult.Markup,
+                await messenger.UpdateScheduleAsync(
+                    new PlatformScheduleMessage(
+                        TelegramPlatformIds.Group(proposal.TelegramChatId, proposal.ThreadId),
+                        view,
+                        TelegramPlatformIds.Message(proposal.TelegramChatId, proposal.ThreadId, proposal.BatchMessageId.Value)),
                     ct);
             }
             else
             {
-                await bot.SendMessage(
-                    chatId: proposal.TelegramChatId,
-                    messageThreadId: proposal.ThreadId,
-                    text: $"📣 Расписание обновлено после голосования за перенос сессии «{System.Net.WebUtility.HtmlEncode(proposal.Title)}».",
-                    parseMode: ParseMode.Html,
-                    cancellationToken: ct);
+                await messenger.SendGroupMessageAsync(
+                    TelegramPlatformIds.Group(proposal.TelegramChatId, proposal.ThreadId),
+                    $"📣 Расписание обновлено после голосования за перенос сессии «{System.Net.WebUtility.HtmlEncode(proposal.Title)}».",
+                    ct);
             }
         }
         catch (Exception ex)

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 +1,188 @@
+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);
+        if (message.ExistingMessage is null)
+        {
+            throw new ArgumentException("Existing schedule message reference is required.", nameof(message));
+        }
+
+        var renderResult = TelegramSessionBatchRenderer.Render(message.View);
+        await BatchMessageEditor.EditBatchMessageAsync(
+            bot,
+            chatId: ParseLong(message.Group.ExternalGroupId),
+            messageId: ParseInt(message.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/Program.cs

@@ -10,6 +10,7 @@ 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;
 
@@ -50,6 +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>();