feat(mobile): 모바일 옵션 메뉴에 통계/도움말 추가 및 오버플로우 수정

- MobileCarouselLayout에 onShowStatistics, onShowHelp 콜백 추가
- 옵션 메뉴에 통계, 도움말 메뉴 항목 추가
- SingleChildScrollView로 메뉴 오버플로우 방지
- isScrollControlled와 maxHeight 제약 조건 적용

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

@@ -43,6 +43,8 @@ class MobileCarouselLayout extends StatefulWidget {
     this.sfxVolume = 0.8,
     this.onBgmVolumeChange,
     this.onSfxVolumeChange,
+    this.onShowStatistics,
+    this.onShowHelp,
   });
 
   final GameState state;
@@ -72,6 +74,12 @@ class MobileCarouselLayout extends StatefulWidget {
   /// SFX 볼륨 변경 콜백
   final void Function(double volume)? onSfxVolumeChange;
 
+  /// 통계 표시 콜백
+  final VoidCallback? onShowStatistics;
+
+  /// 도움말 표시 콜백
+  final VoidCallback? onShowHelp;
+
   @override
   State<MobileCarouselLayout> createState() => _MobileCarouselLayoutState();
 }
@@ -349,10 +357,15 @@ class _MobileCarouselLayoutState extends State<MobileCarouselLayout> {
 
     showModalBottomSheet<void>(
       context: context,
+      isScrollControlled: true,
+      constraints: BoxConstraints(
+        maxHeight: MediaQuery.of(context).size.height * 0.7,
+      ),
       builder: (context) => SafeArea(
-        child: Column(
-          mainAxisSize: MainAxisSize.min,
-          children: [
+        child: SingleChildScrollView(
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
             // 헤더
             Container(
               padding: const EdgeInsets.all(16),
@@ -410,6 +423,32 @@ class _MobileCarouselLayoutState extends State<MobileCarouselLayout> {
               },
             ),
 
+            const Divider(),
+
+            // 통계
+            if (widget.onShowStatistics != null)
+              ListTile(
+                leading: const Icon(Icons.bar_chart, color: Colors.blue),
+                title: Text(l10n.uiStatistics),
+                onTap: () {
+                  Navigator.pop(context);
+                  widget.onShowStatistics?.call();
+                },
+              ),
+
+            // 도움말
+            if (widget.onShowHelp != null)
+              ListTile(
+                leading: const Icon(Icons.help_outline, color: Colors.green),
+                title: Text(l10n.uiHelp),
+                onTap: () {
+                  Navigator.pop(context);
+                  widget.onShowHelp?.call();
+                },
+              ),
+
+            const Divider(),
+
             // 언어 변경
             ListTile(
               leading: const Icon(Icons.language, color: Colors.teal),
@@ -506,6 +545,7 @@ class _MobileCarouselLayoutState extends State<MobileCarouselLayout> {
             const SizedBox(height: 8),
           ],
         ),
+        ),
       ),
     );
   }