style(ui): 전체 화면 폰트 크기 증가

- arena: 전투/결과/랭크 화면 폰트 조정
- front: 메인 화면 폰트 조정
- game: 게임플레이 위젯 전반 폰트 조정 (스킬, 장비, 인벤토리 등)
- hall_of_fame: 명예의 전당 폰트 조정
- new_character: 캐릭터 생성 화면 폰트 조정
- settings: 설정 화면 폰트 조정
- 전반적인 가독성 향상

lib/src/features/arena/widgets/arena_result_panel.dart

@@ -133,7 +133,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
           SnackBar(
             content: Text(
               '${l10n.uiSaved}: $fileName',
-              style: const TextStyle(fontFamily: 'PressStart2P', fontSize: 6),
+              style: const TextStyle(fontFamily: 'PressStart2P', fontSize: 11),
             ),
             backgroundColor: RetroColors.mpOf(context),
             duration: const Duration(seconds: 3),
@@ -146,7 +146,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
           SnackBar(
             content: Text(
               '${l10n.uiError}: $e',
-              style: const TextStyle(fontFamily: 'PressStart2P', fontSize: 6),
+              style: const TextStyle(fontFamily: 'PressStart2P', fontSize: 11),
             ),
             backgroundColor: RetroColors.hpOf(context),
             duration: const Duration(seconds: 3),
@@ -366,7 +366,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
           isVictory ? _victory : _defeat,
           style: TextStyle(
             fontFamily: 'PressStart2P',
-            fontSize: 10,
+            fontSize: 14,
             color: color,
           ),
         ),
@@ -396,7 +396,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
           winner,
           style: TextStyle(
             fontFamily: 'PressStart2P',
-            fontSize: 7,
+            fontSize: 11,
             color: RetroColors.goldOf(context),
           ),
         ),
@@ -404,7 +404,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
           ' defeated ',
           style: TextStyle(
             fontFamily: 'PressStart2P',
-            fontSize: 6,
+            fontSize: 11,
             color: RetroColors.textMutedOf(context),
           ),
         ),
@@ -413,7 +413,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
           loser,
           style: TextStyle(
             fontFamily: 'PressStart2P',
-            fontSize: 7,
+            fontSize: 12,
             color: RetroColors.textSecondaryOf(context),
           ),
         ),
@@ -421,7 +421,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
           ' in ',
           style: TextStyle(
             fontFamily: 'PressStart2P',
-            fontSize: 6,
+            fontSize: 11,
             color: RetroColors.textMutedOf(context),
           ),
         ),
@@ -436,7 +436,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
             '${widget.turnCount} $_turns',
             style: TextStyle(
               fontFamily: 'PressStart2P',
-              fontSize: 6,
+              fontSize: 12,
               color: RetroColors.goldOf(context),
             ),
           ),
@@ -502,7 +502,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
                 _exchange,
                 style: TextStyle(
                   fontFamily: 'PressStart2P',
-                  fontSize: 6,
+                  fontSize: 12,
                   color: RetroColors.goldOf(context),
                 ),
               ),
@@ -514,7 +514,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
             _getSlotLabel(slot),
             style: TextStyle(
               fontFamily: 'PressStart2P',
-              fontSize: 6,
+              fontSize: 12,
               color: RetroColors.textMutedOf(context),
             ),
           ),
@@ -559,7 +559,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
                       '${scoreDiff >= 0 ? '+' : ''}$scoreDiff',
                       style: TextStyle(
                         fontFamily: 'PressStart2P',
-                        fontSize: 6,
+                        fontSize: 11,
                         color: scoreDiff >= 0 ? Colors.green : Colors.red,
                       ),
                     ),
@@ -586,7 +586,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
           '(empty)',
           style: TextStyle(
             fontFamily: 'PressStart2P',
-            fontSize: 5,
+            fontSize: 11,
             color: RetroColors.textMutedOf(context),
           ),
         ),
@@ -609,7 +609,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
             item.name,
             style: TextStyle(
               fontFamily: 'PressStart2P',
-              fontSize: 5,
+              fontSize: 12,
               color: rarityColor,
             ),
             maxLines: 1,
@@ -619,7 +619,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
             '$score pt',
             style: TextStyle(
               fontFamily: 'PressStart2P',
-              fontSize: 5,
+              fontSize: 12,
               color: RetroColors.textMutedOf(context),
             ),
           ),
@@ -642,7 +642,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
           l10n.buttonConfirm,
           style: const TextStyle(
             fontFamily: 'PressStart2P',
-            fontSize: 8,
+            fontSize: 13,
             color: Colors.black,
           ),
         ),
@@ -659,7 +659,7 @@ class _ArenaResultPanelState extends State<ArenaResultPanel>
         icon: const Icon(Icons.save_alt, size: 14),
         label: Text(
           l10n.uiSaveBattleLog,
-          style: const TextStyle(fontFamily: 'PressStart2P', fontSize: 6),
+          style: const TextStyle(fontFamily: 'PressStart2P', fontSize: 11),
         ),
         style: OutlinedButton.styleFrom(
           foregroundColor: RetroColors.mpOf(context),