fix(game): aktualisiere Handkarten nach gespieltem Slip

SlipItIn.Server/Hubs/GameHub.cs

@@ -233,6 +233,7 @@ public class GameHub : Hub
 
             var result = await _gameService.SubmitSlipAsync(gameId, playerId, cardId);
             var game = await _gameService.GetGameAsync(gameId);
+            var hand = await _gameService.GetPlayerHandAsync(playerId);
 
             await Clients.Group(game.LobbyCode).SendAsync("SlipSubmitted", new 
             { 
@@ -240,6 +241,7 @@ public class GameHub : Hub
                 CardId = cardId,
                 Success = result 
             });
+            await Clients.Caller.SendAsync("PlayerHandUpdated", hand);
         }
         catch (UnauthorizedAccessException ex)
         {