feat: add game graphic

lib/feature/profile/presentation/screen/profile_screen.dart

@@ -4,6 +4,7 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:go_router/go_router.dart';
 import 'package:random_avatar/random_avatar.dart';
 
+import '../../../../core/settings/app_settings.dart';
 import '../../../../core/theme/app_theme.dart';
 import '../../../../core/widgets/game_ui.dart';
 import '../../../../core/widgets/rank_badge.dart';
@@ -198,6 +199,8 @@ class ProfileScreen extends StatelessWidget {
           const SizedBox(height: 8),
           _statsSection(context, d),
           const SizedBox(height: 16),
+          const _GraphicsToggle(),
+          const SizedBox(height: 8),
           Align(
             alignment: Alignment.center,
             child: TextButton.icon(
@@ -490,3 +493,40 @@ class _EditProfileSheetState extends State<_EditProfileSheet> {
     );
   }
 }
+
+/// سوئیچِ «گرافیک کم‌مصرف»: افکت‌های اتمسفری را برای گوشی‌های ضعیف خاموش می‌کند.
+class _GraphicsToggle extends StatelessWidget {
+  const _GraphicsToggle();
+
+  @override
+  Widget build(BuildContext context) {
+    return ValueListenableBuilder<bool>(
+      valueListenable: AppSettings.I.lowGraphics,
+      builder: (context, low, _) => Container(
+        padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 6),
+        decoration: BoxDecoration(
+          color: AppColors.panel.withValues(alpha: 0.5),
+          borderRadius: BorderRadius.circular(12),
+          border: Border.all(color: AppColors.goldFaint),
+        ),
+        child: Row(
+          children: [
+            const Icon(Icons.bolt, color: AppColors.gold, size: 20),
+            const SizedBox(width: 10),
+            const Expanded(
+              child: Text(
+                'گرافیک کم‌مصرف',
+                style: TextStyle(color: Colors.white, fontSize: 14),
+              ),
+            ),
+            Switch(
+              value: low,
+              activeThumbColor: AppColors.gold,
+              onChanged: (v) => AppSettings.I.setLowGraphics(v),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}