refactor(ui): 기타 화면 정리

- FrontScreen, HallOfFameScreen 개선
- NewCharacterScreen, SettingsScreen 정리
- App 초기화 로직 정리

lib/src/features/new_character/new_character_screen.dart

@@ -784,5 +784,4 @@ class _NewCharacterScreenState extends State<NewCharacterScreen> {
       ClassPassiveType.firstStrikeBonus => passive.description,
     };
   }
-
 }

lib/src/features/new_character/widgets/race_preview.dart

@@ -11,10 +11,7 @@ import 'package:asciineverdie/src/core/animation/race_character_frames.dart';
 /// 새 캐릭터 생성 화면에서 선택한 종족의 idle 애니메이션을 보여줌.
 /// RichText 기반 색상 적용.
 class RacePreview extends StatefulWidget {
-  const RacePreview({
-    super.key,
-    required this.raceId,
-  });
+  const RacePreview({super.key, required this.raceId});
 
   /// 종족 ID (예: "byte_human", "kernel_giant")
   final String raceId;
@@ -121,9 +118,7 @@ class _RacePreviewState extends State<RacePreview> {
       );
     }
 
-    return RichText(
-      text: TextSpan(children: spans),
-    );
+    return RichText(text: TextSpan(children: spans));
   }
 
   /// 문자별 색상 매핑