refactor(ui): 화면 UI 정리

- front_screen: 프론트 화면 레이아웃 개선
- settings_screen: 설정 화면 간소화
- new_character_screen: 캐릭터 생성 화면 정리

lib/src/features/front/front_screen.dart

@@ -321,8 +321,8 @@ class _ActionButtons extends StatelessWidget {
             onPressed: onSettings,
             isPrimary: false,
           ),
-          // IAP 구매 (광고 제거) - 스토어 사용 가능하고 미구매 상태일 때만 표시
+          // IAP 구매 (광고 제거) - 스토어 사용 가능할 때 표시 (구매 완료 시 비활성화)
-          if (removeAdsPrice != null && !isAdRemovalPurchased) ...[
+          if (removeAdsPrice != null) ...[
             const SizedBox(height: 20),
             const Divider(color: RetroColors.panelBorderInner, height: 1),
             const SizedBox(height: 12),
@@ -330,13 +330,12 @@ class _ActionButtons extends StatelessWidget {
               price: removeAdsPrice!,
               onPurchase: onPurchaseRemoveAds,
               onRestore: onRestorePurchase,
+              enabled: !isAdRemovalPurchased,
             ),
           ],
-          // 이미 구매된 경우 표시
+          // 이미 구매된 경우 배지 표시
           if (isAdRemovalPurchased) ...[
-            const SizedBox(height: 20),
+            const SizedBox(height: 8),
-            const Divider(color: RetroColors.panelBorderInner, height: 1),
-            const SizedBox(height: 12),
             _PurchasedBadge(),
           ],
         ],
@@ -412,11 +411,13 @@ class _IapPurchaseButton extends StatelessWidget {
     required this.price,
     this.onPurchase,
     this.onRestore,
+    this.enabled = true,
   });
 
   final String price;
   final VoidCallback? onPurchase;
   final VoidCallback? onRestore;
+  final bool enabled;
 
   void _showPurchaseDialog(BuildContext context) {
     showDialog<void>(
@@ -433,23 +434,33 @@ class _IapPurchaseButton extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    // 비활성화 상태의 색상
+    final buttonColor = enabled ? RetroColors.gold : RetroColors.textDisabled;
+    final bgGradient = enabled
+        ? const LinearGradient(
+            colors: [Color(0xFF4A3B2A), Color(0xFF3D2E1F)],
+            begin: Alignment.topCenter,
+            end: Alignment.bottomCenter,
+          )
+        : const LinearGradient(
+            colors: [Color(0xFF3A3A3A), Color(0xFF2A2A2A)],
+            begin: Alignment.topCenter,
+            end: Alignment.bottomCenter,
+          );
+
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
         // 구매 버튼 (클릭 시 팝업)
         Container(
           decoration: BoxDecoration(
-            gradient: const LinearGradient(
+            gradient: bgGradient,
-              colors: [Color(0xFF4A3B2A), Color(0xFF3D2E1F)],
+            border: Border.all(color: buttonColor, width: 2),
-              begin: Alignment.topCenter,
-              end: Alignment.bottomCenter,
-            ),
-            border: Border.all(color: RetroColors.gold, width: 2),
           ),
           child: Material(
             color: Colors.transparent,
             child: InkWell(
-              onTap: () => _showPurchaseDialog(context),
+              onTap: enabled ? () => _showPurchaseDialog(context) : null,
               child: Padding(
                 padding: const EdgeInsets.symmetric(
                   horizontal: 16,
@@ -457,7 +468,7 @@ class _IapPurchaseButton extends StatelessWidget {
                 ),
                 child: Row(
                   children: [
-                    const Icon(Icons.block, color: RetroColors.gold, size: 24),
+                    Icon(Icons.block, color: buttonColor, size: 24),
                     const SizedBox(width: 12),
                     Expanded(
                       child: Column(
@@ -465,10 +476,10 @@ class _IapPurchaseButton extends StatelessWidget {
                         children: [
                           Text(
                             game_l10n.iapRemoveAds,
-                            style: const TextStyle(
+                            style: TextStyle(
                               fontFamily: 'PressStart2P',
                               fontSize: 12,
-                              color: RetroColors.gold,
+                              color: buttonColor,
                             ),
                           ),
                           const SizedBox(height: 4),
@@ -484,11 +495,7 @@ class _IapPurchaseButton extends StatelessWidget {
                       ),
                     ),
                     // 화살표 아이콘 (상세 보기)
-                    const Icon(
+                    Icon(Icons.arrow_forward_ios, color: buttonColor, size: 16),
-                      Icons.arrow_forward_ios,
-                      color: RetroColors.gold,
-                      size: 16,
-                    ),
                   ],
                 ),
               ),
@@ -499,7 +506,7 @@ class _IapPurchaseButton extends StatelessWidget {
         // 복원 버튼
         Center(
           child: TextButton(
-            onPressed: onRestore,
+            onPressed: enabled ? onRestore : null,
             child: Text(
               game_l10n.iapRestorePurchase,
               style: const TextStyle(
@@ -569,7 +576,10 @@ class _IapPurchaseDialog extends StatelessWidget {
               const SizedBox(height: 8),
               _BenefitItem(icon: Icons.speed, text: game_l10n.iapBenefit5),
               const SizedBox(height: 8),
-              _BenefitItem(icon: Icons.inventory_2, text: game_l10n.iapBenefit6),
+              _BenefitItem(
+                icon: Icons.inventory_2,
+                text: game_l10n.iapBenefit6,
+              ),
               const SizedBox(height: 20),
               // 가격 + 구매 버튼
               Container(

lib/src/features/new_character/new_character_screen.dart

@@ -803,7 +803,6 @@ class _NewCharacterScreenState extends State<NewCharacterScreen> {
       PassiveType.magicDamageBonus => game_l10n.passiveMagicBonus(percent),
       PassiveType.criticalBonus => game_l10n.passiveCritBonus(percent),
       PassiveType.expBonus => passive.description,
-      PassiveType.deathEquipmentPreserve => passive.description,
     };
   }
 

lib/src/features/settings/settings_screen.dart

@@ -64,7 +64,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
   bool _isLoading = true;
 
   // 디버그 설정 상태 (Phase 8)
-  bool _debugAdEnabled = true;
   bool _debugIapSimulated = false;
   int _debugOfflineHours = 0;
 
@@ -80,7 +79,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
 
     // 디버그 설정 로드 (Phase 8)
     final debugSettings = DebugSettingsService.instance;
-    final adEnabled = debugSettings.adEnabled;
     final iapSimulated = debugSettings.iapSimulated;
     final offlineHours = debugSettings.offlineHours;
 
@@ -88,7 +86,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
       setState(() {
         _bgmVolume = bgm;
         _sfxVolume = sfx;
-        _debugAdEnabled = adEnabled;
         _debugIapSimulated = iapSimulated;
         _debugOfflineHours = offlineHours;
         _isLoading = false;
@@ -304,7 +301,11 @@ class _SettingsScreenState extends State<SettingsScreen> {
           // 헤더
           Row(
             children: [
-              Icon(Icons.bug_report, color: RetroColors.hpOf(context), size: 16),
+              Icon(
+                Icons.bug_report,
+                color: RetroColors.hpOf(context),
+                size: 16,
+              ),
               const SizedBox(width: 8),
               Text(
                 'DEVELOPER TOOLS',
@@ -318,19 +319,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
           ),
           const SizedBox(height: 16),
 
-          // 광고 ON/OFF 토글
-          _RetroDebugToggle(
-            icon: Icons.ad_units,
-            label: 'ADS ENABLED',
-            description: 'OFF: 광고 버튼 클릭 시 바로 보상',
-            value: _debugAdEnabled,
-            onChanged: (value) async {
-              await DebugSettingsService.instance.setAdEnabled(value);
-              setState(() => _debugAdEnabled = value);
-            },
-          ),
-          const SizedBox(height: 12),
-
           // IAP 시뮬레이션 토글
           _RetroDebugToggle(
             icon: Icons.shopping_cart,
@@ -448,7 +436,8 @@ class _SettingsScreenState extends State<SettingsScreen> {
       context: context,
       builder: (context) => _RetroConfirmDialog(
         title: 'CREATE TEST CHARACTER?',
-        message: '현재 캐릭터가 레벨 100으로 변환되어\n'
+        message:
+            '현재 캐릭터가 레벨 100으로 변환되어\n'
             '명예의 전당에 등록됩니다.\n\n'
             '⚠️ 현재 세이브 파일이 삭제됩니다.\n'
             '이 작업은 되돌릴 수 없습니다.',
@@ -480,11 +469,7 @@ class _RetroSectionTitle extends StatelessWidget {
   Widget build(BuildContext context) {
     return Row(
       children: [
-        Container(
+        Container(width: 4, height: 14, color: RetroColors.goldOf(context)),
-          width: 4,
-          height: 14,
-          color: RetroColors.goldOf(context),
-        ),
         const SizedBox(width: 8),
         Text(
           title.toUpperCase(),