feat(hall-of-fame): 명예의 전당 상세 UI 및 전투 스탯 저장 추가

- CombatStats에 toJson/fromJson 직렬화 메서드 추가
- HallOfFameEntry에 finalStats(CombatStats) 필드 추가
- 명예의 전당 상세 다이얼로그에서 전투 스탯, 장비, 스펠 표시
- GameState에 combatStats 접근자 추가
- game_text_l10n에 명예의 전당 관련 텍스트 추가

lib/src/core/model/combat_stats.dart

@@ -391,6 +391,60 @@ class CombatStats {
     );
   }
 
+  /// JSON으로 직렬화
+  Map<String, dynamic> toJson() {
+    return {
+      'str': str,
+      'con': con,
+      'dex': dex,
+      'intelligence': intelligence,
+      'wis': wis,
+      'cha': cha,
+      'atk': atk,
+      'def': def,
+      'magAtk': magAtk,
+      'magDef': magDef,
+      'criRate': criRate,
+      'criDamage': criDamage,
+      'evasion': evasion,
+      'accuracy': accuracy,
+      'blockRate': blockRate,
+      'parryRate': parryRate,
+      'attackDelayMs': attackDelayMs,
+      'hpMax': hpMax,
+      'hpCurrent': hpCurrent,
+      'mpMax': mpMax,
+      'mpCurrent': mpCurrent,
+    };
+  }
+
+  /// JSON에서 역직렬화
+  factory CombatStats.fromJson(Map<String, dynamic> json) {
+    return CombatStats(
+      str: json['str'] as int,
+      con: json['con'] as int,
+      dex: json['dex'] as int,
+      intelligence: json['intelligence'] as int,
+      wis: json['wis'] as int,
+      cha: json['cha'] as int,
+      atk: json['atk'] as int,
+      def: json['def'] as int,
+      magAtk: json['magAtk'] as int,
+      magDef: json['magDef'] as int,
+      criRate: (json['criRate'] as num).toDouble(),
+      criDamage: (json['criDamage'] as num).toDouble(),
+      evasion: (json['evasion'] as num).toDouble(),
+      accuracy: (json['accuracy'] as num).toDouble(),
+      blockRate: (json['blockRate'] as num).toDouble(),
+      parryRate: (json['parryRate'] as num).toDouble(),
+      attackDelayMs: json['attackDelayMs'] as int,
+      hpMax: json['hpMax'] as int,
+      hpCurrent: json['hpCurrent'] as int,
+      mpMax: json['mpMax'] as int,
+      mpCurrent: json['mpCurrent'] as int,
+    );
+  }
+
   /// 테스트/디버그용 기본값
   factory CombatStats.empty() => const CombatStats(
     str: 10,