fix(ui): 게임 위젯들 레이아웃 및 스타일 수정

- death_overlay: 레이아웃 개선
- help_dialog, statistics_dialog: 스타일 통일
- notification_overlay: 간소화
- carousel_nav_bar: 스타일 업데이트
- mobile_carousel_layout: 레이아웃 조정

lib/src/features/game/widgets/notification_overlay.dart

@@ -119,18 +119,23 @@ class _NotificationCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final (accentColor, icon, asciiIcon) = _getStyleForType(notification.type);
+    final (accentColor, icon, asciiIcon) = _getStyleForType(context, notification.type);
+    final panelBg = RetroColors.panelBgOf(context);
+    final borderColor = RetroColors.borderOf(context);
+    final surface = RetroColors.surfaceOf(context);
+    final textPrimary = RetroColors.textPrimaryOf(context);
+    final textMuted = RetroColors.textMutedOf(context);
 
     return GestureDetector(
       onTap: onDismiss,
       child: Container(
         decoration: BoxDecoration(
-          color: RetroColors.panelBg,
+          color: panelBg,
           border: Border(
             top: BorderSide(color: accentColor, width: 3),
             left: BorderSide(color: accentColor, width: 3),
-            bottom: const BorderSide(color: RetroColors.panelBorderOuter, width: 3),
-            right: const BorderSide(color: RetroColors.panelBorderOuter, width: 3),
+            bottom: BorderSide(color: borderColor, width: 3),
+            right: BorderSide(color: borderColor, width: 3),
           ),
           boxShadow: [
             BoxShadow(
@@ -176,12 +181,12 @@ class _NotificationCard extends StatelessWidget {
                   // 닫기 버튼
                   GestureDetector(
                     onTap: onDismiss,
-                    child: const Text(
+                    child: Text(
                       '[X]',
                       style: TextStyle(
                         fontFamily: 'PressStart2P',
                         fontSize: 7,
-                        color: RetroColors.textDisabled,
+                        color: textMuted,
                       ),
                     ),
                   ),
@@ -198,7 +203,7 @@ class _NotificationCard extends StatelessWidget {
                     width: 36,
                     height: 36,
                     decoration: BoxDecoration(
-                      color: RetroColors.panelBgLight,
+                      color: surface,
                       border: Border.all(color: accentColor, width: 2),
                     ),
                     child: Icon(icon, color: accentColor, size: 20),
@@ -212,20 +217,20 @@ class _NotificationCard extends StatelessWidget {
                       children: [
                         Text(
                           notification.title,
-                          style: const TextStyle(
+                          style: TextStyle(
                             fontFamily: 'PressStart2P',
                             fontSize: 9,
-                            color: RetroColors.textLight,
+                            color: textPrimary,
                           ),
                         ),
                         if (notification.subtitle != null) ...[
                           const SizedBox(height: 4),
                           Text(
                             notification.subtitle!,
-                            style: const TextStyle(
+                            style: TextStyle(
                               fontFamily: 'PressStart2P',
                               fontSize: 7,
-                              color: RetroColors.textDisabled,
+                              color: textMuted,
                             ),
                           ),
                         ],
@@ -242,53 +247,25 @@ class _NotificationCard extends StatelessWidget {
   }
 
   /// 알림 타입별 레트로 스타일 (강조 색상, 아이콘, ASCII 아이콘)
-  (Color, IconData, String) _getStyleForType(NotificationType type) {
+  (Color, IconData, String) _getStyleForType(
+    BuildContext context,
+    NotificationType type,
+  ) {
+    final gold = RetroColors.goldOf(context);
+    final exp = RetroColors.expOf(context);
+    final mp = RetroColors.mpOf(context);
+    final hp = RetroColors.hpOf(context);
+
     return switch (type) {
-      NotificationType.levelUp => (
-        RetroColors.gold,
-        Icons.arrow_upward,
-        '★',
-      ),
-      NotificationType.questComplete => (
-        RetroColors.expGreen,
-        Icons.check,
-        '☑',
-      ),
-      NotificationType.actComplete => (
-        RetroColors.mpBlue,
-        Icons.flag,
-        '⚑',
-      ),
-      NotificationType.newSpell => (
-        const Color(0xFF9966FF),
-        Icons.auto_fix_high,
-        '✧',
-      ),
-      NotificationType.newEquipment => (
-        const Color(0xFFFF9933),
-        Icons.shield,
-        '⚔',
-      ),
-      NotificationType.bossDefeat => (
-        RetroColors.hpRed,
-        Icons.whatshot,
-        '☠',
-      ),
-      NotificationType.gameSaved => (
-        RetroColors.expGreen,
-        Icons.save,
-        '💾',
-      ),
-      NotificationType.info => (
-        RetroColors.mpBlue,
-        Icons.info_outline,
-        'ℹ',
-      ),
-      NotificationType.warning => (
-        const Color(0xFFFFCC00),
-        Icons.warning,
-        '⚠',
-      ),
+      NotificationType.levelUp => (gold, Icons.arrow_upward, '★'),
+      NotificationType.questComplete => (exp, Icons.check, '☑'),
+      NotificationType.actComplete => (mp, Icons.flag, '⚑'),
+      NotificationType.newSpell => (const Color(0xFF9966FF), Icons.auto_fix_high, '✧'),
+      NotificationType.newEquipment => (const Color(0xFFFF9933), Icons.shield, '⚔'),
+      NotificationType.bossDefeat => (hp, Icons.whatshot, '☠'),
+      NotificationType.gameSaved => (exp, Icons.save, '💾'),
+      NotificationType.info => (mp, Icons.info_outline, 'ℹ'),
+      NotificationType.warning => (const Color(0xFFFFCC00), Icons.warning, '⚠'),
     };
   }