feat(debug): 모바일 레이아웃에 치트 기능 추가

- MobileCarouselLayout에 치트 버튼 추가
- GameSessionController에 치트 활성화 상태 관리 추가
- ProgressLoop/ProgressService에 치트 메서드 추가

lib/src/features/game/layouts/mobile_carousel_layout.dart

@@ -46,6 +46,10 @@ class MobileCarouselLayout extends StatefulWidget {
     this.onSfxVolumeChange,
     this.onShowStatistics,
     this.onShowHelp,
+    this.cheatsEnabled = false,
+    this.onCheatTask,
+    this.onCheatQuest,
+    this.onCheatPlot,
   });
 
   final GameState state;
@@ -81,6 +85,18 @@ class MobileCarouselLayout extends StatefulWidget {
   /// 도움말 표시 콜백
   final VoidCallback? onShowHelp;
 
+  /// 치트 모드 활성화 여부
+  final bool cheatsEnabled;
+
+  /// 치트: 태스크 완료
+  final VoidCallback? onCheatTask;
+
+  /// 치트: 퀘스트 완료
+  final VoidCallback? onCheatQuest;
+
+  /// 치트: 액트(플롯) 완료
+  final VoidCallback? onCheatPlot;
+
   @override
   State<MobileCarouselLayout> createState() => _MobileCarouselLayoutState();
 }
@@ -547,6 +563,52 @@ class _MobileCarouselLayoutState extends State<MobileCarouselLayout> {
                 },
               ),
 
+              // 치트 섹션 (디버그 모드에서만 표시)
+              if (widget.cheatsEnabled) ...[
+                const Divider(),
+                Padding(
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 16,
+                    vertical: 8,
+                  ),
+                  child: Text(
+                    'DEBUG CHEATS',
+                    style: TextStyle(
+                      fontFamily: 'PressStart2P',
+                      fontSize: 8,
+                      color: Colors.red.shade300,
+                    ),
+                  ),
+                ),
+                ListTile(
+                  leading: const Icon(Icons.fast_forward, color: Colors.red),
+                  title: const Text('Skip Task (L+1)'),
+                  subtitle: const Text('태스크 즉시 완료'),
+                  onTap: () {
+                    Navigator.pop(context);
+                    widget.onCheatTask?.call();
+                  },
+                ),
+                ListTile(
+                  leading: const Icon(Icons.skip_next, color: Colors.red),
+                  title: const Text('Skip Quest (Q!)'),
+                  subtitle: const Text('퀘스트 즉시 완료'),
+                  onTap: () {
+                    Navigator.pop(context);
+                    widget.onCheatQuest?.call();
+                  },
+                ),
+                ListTile(
+                  leading: const Icon(Icons.double_arrow, color: Colors.red),
+                  title: const Text('Skip Act (P!)'),
+                  subtitle: const Text('액트 즉시 완료 (명예의 전당 테스트용)'),
+                  onTap: () {
+                    Navigator.pop(context);
+                    widget.onCheatPlot?.call();
+                  },
+                ),
+              ],
+
               const SizedBox(height: 8),
             ],
           ),