feat: Enhance game and lobby components with improved state management and user notifications

knockoutwhistweb/app/model/sessions/UserSession.scala

@@ -74,6 +74,10 @@ class UserSession(val user: User, val host: Boolean, val gameLobby: GameLobby) e
         }
       case "ReturnToLobby" =>
         gameLobby.returnToLobby(this)
+      case "LeaveGame" =>
+        gameLobby.leaveGame(user.id, false)
+      case _ =>
+        println("Unknown event type: " + eventType + " with data: " + data)
     }
   }