feat: add carpet

lib/feature/game/presentation/screen/game_screen.dart

@@ -31,6 +31,7 @@ class GameScreen extends StatefulWidget {
 
 class _GameScreenState extends State<GameScreen> {
   late final HokmGame _game;
+  String _carpet = 'classic'; // فرشِ انتخابی (برای پس‌زمینه‌ی پشتِ صحنه)
   Timer? _introTimer;
   bool _introHidden = false;
   int _countdown = 0; // شمارشِ معکوسِ شروعِ بازی پس از یافتنِ حریفان (۳…۲…۱)
@@ -40,9 +41,11 @@ class _GameScreenState extends State<GameScreen> {
     super.initState();
     final ws = context.read<WalletBloc>().state.walletStatus;
     final skin = ws is WalletLoaded ? ws.wallet.selectedCard : 'simple';
+    _carpet = ws is WalletLoaded ? ws.wallet.selectedCarpet : 'classic';
     _game = HokmGame(
       context.read<GameBloc>(),
       skin: skin.isEmpty ? 'simple' : skin,
+      carpet: _carpet.isEmpty ? 'classic' : _carpet,
     );
   }
 
@@ -114,6 +117,7 @@ class _GameScreenState extends State<GameScreen> {
               }
               return Stack(
                 children: [
+                  // فرش به‌عنوانِ سطحِ میز داخلِ صحنه‌ی Flame (Felt) کشیده می‌شود.
                   GameWidget(game: _game),
                   if (!_showSearch(state) && state.state != null)
                     TableHud(