Add EventDef notices, morning and lesson bells, and info toasts.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/HSchool.Server/Net/GameSocketHandler.cs

@@ -180,6 +180,11 @@ internal sealed class GameSocketHandler(
 
                     break;
 
+                case MessageType.ClientDismissNotice:
+                    var dismiss = ProtocolCodec.ReadDismissNotice(frame);
+                    commands.Enqueue(new GameCommand.DismissNotice(client.PlayerId, dismiss.Id));
+                    break;
+
                 default:
                     logger.LogDebug(
                         "Ignoring unexpected frame 0x{MessageType:X2} from client {PlayerId}.",