feat: implement Blazor web interface for GM session management

- Created GmRelay.Web project (Blazor Server)
- Created GmRelay.Shared library for domain models and rendering
- Refactored GmRelay.Bot to use the Shared library
- Integrated Telegram Login widget with server-side HMAC verification
- Added Dashboard, Group Details, and Edit Session pages
- Enabled bot notifications and in-place message updates from web actions
- Updated .NET Aspire orchestration and Docker Compose configuration

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

@@ -1,5 +1,6 @@
 using Dapper;
-using GmRelay.Bot.Domain;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Rendering;
 using Npgsql;
 using Telegram.Bot;
 using Telegram.Bot.Types;
@@ -212,11 +213,11 @@ public sealed class HandleRescheduleTimeInputHandler(
         {
             await using var conn = await dataSource.OpenConnectionAsync(ct);
 
-            var batchSessions = (await conn.QueryAsync<GmRelay.Bot.Features.Sessions.CreateSession.SessionBatchDto>(
+            var batchSessions = (await conn.QueryAsync<SessionBatchDto>(
                 "SELECT id AS SessionId, scheduled_at AS ScheduledAt, status AS Status FROM sessions WHERE batch_id = @BatchId ORDER BY scheduled_at",
                 new { proposal.BatchId })).ToList();
 
-            var batchParticipants = (await conn.QueryAsync<GmRelay.Bot.Features.Sessions.CreateSession.ParticipantBatchDto>(
+            var batchParticipants = (await conn.QueryAsync<ParticipantBatchDto>(
                 """
                 SELECT sp.session_id AS SessionId, p.display_name AS DisplayName, p.telegram_username AS TelegramUsername
                 FROM session_participants sp
@@ -229,7 +230,7 @@ public sealed class HandleRescheduleTimeInputHandler(
 
             if (proposal.BatchMessageId.HasValue)
             {
-                var renderResult = GmRelay.Bot.Features.Sessions.CreateSession.SessionBatchRenderer.Render(
+                var renderResult = SessionBatchRenderer.Render(
                     proposal.Title, batchSessions, batchParticipants);
 
                 await bot.EditMessageText(

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

@@ -1,5 +1,6 @@
 using Dapper;
-using GmRelay.Bot.Domain;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Rendering;
 using GmRelay.Bot.Features.Sessions.CreateSession;
 using Npgsql;
 using Telegram.Bot;