feat(hall): Phase 10 명예의 전당 시스템 구현

- HallOfFameEntry 모델 및 HallOfFame 컬렉션 추가
- HallOfFameStorage 저장소 (JSON 파일 기반)
- HallOfFameScreen UI (순위별 색상/아이콘)
- 게임 클리어 시 명예의 전당 등록 처리
- FrontScreen에 명예의 전당 버튼 추가
- 클리어 축하 다이얼로그 구현

lib/src/app.dart

@@ -13,6 +13,7 @@ import 'package:askiineverdie/src/features/front/front_screen.dart';
 import 'package:askiineverdie/src/features/front/save_picker_dialog.dart';
 import 'package:askiineverdie/src/features/game/game_play_screen.dart';
 import 'package:askiineverdie/src/features/game/game_session_controller.dart';
+import 'package:askiineverdie/src/features/hall_of_fame/hall_of_fame_screen.dart';
 import 'package:askiineverdie/src/features/new_character/new_character_screen.dart';
 
 class AskiiNeverDieApp extends StatefulWidget {
@@ -69,6 +70,7 @@ class _AskiiNeverDieAppState extends State<AskiiNeverDieApp> {
       home: FrontScreen(
         onNewCharacter: _navigateToNewCharacter,
         onLoadSave: _loadSave,
+        onHallOfFame: _navigateToHallOfFame,
       ),
     );
   }
@@ -152,4 +154,13 @@ class _AskiiNeverDieAppState extends State<AskiiNeverDieApp> {
       ),
     );
   }
+
+  /// Phase 10: 명예의 전당 화면으로 이동
+  void _navigateToHallOfFame(BuildContext context) {
+    Navigator.of(context).push(
+      MaterialPageRoute<void>(
+        builder: (context) => const HallOfFameScreen(),
+      ),
+    );
+  }
 }