refactor(arch): ad_service, iap_service를 core/infrastructure/로 이동

- core/engine/ → core/infrastructure/ (프레임워크 오염 제거)
- 18개 파일 import 경로 업데이트
- CLAUDE.md 디렉토리 구조 반영

CLAUDE.md

@@ -55,6 +55,7 @@ lib/
     │   │   ├── story_service.dart         # 스토리 진행
     │   │   └── ...                        # 기타 서비스
     │   ├── model/                     # 게임 상태 및 데이터 모델
+    │   ├── infrastructure/            # 외부 서비스 (광고, IAP 등)
     │   ├── audio/                     # 오디오 서비스
     │   ├── storage/                   # 세이브/설정 저장소
     │   ├── notification/              # 알림 서비스

lib/src/app.dart

@@ -3,9 +3,9 @@ import 'package:flutter/material.dart';
 import 'package:asciineverdie/data/game_text_l10n.dart' as game_l10n;
 import 'package:asciineverdie/l10n/app_localizations.dart';
 import 'package:asciineverdie/src/core/audio/audio_service.dart';
-import 'package:asciineverdie/src/core/engine/ad_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/ad_service.dart';
 import 'package:asciineverdie/src/core/engine/debug_settings_service.dart';
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 import 'package:asciineverdie/src/app_theme.dart';
 import 'package:asciineverdie/src/splash_screen.dart';
 import 'package:asciineverdie/src/core/engine/game_mutations.dart';

lib/src/core/di/i_ad_service.dart

@@ -1,4 +1,4 @@
-import 'package:asciineverdie/src/core/engine/ad_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/ad_service.dart';
 
 /// 광고 서비스 인터페이스 (interface)
 ///

lib/src/core/di/i_iap_service.dart

@@ -1,4 +1,4 @@
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 
 /// IAP 서비스 인터페이스 (interface)
 ///

lib/src/core/di/service_locator.dart

@@ -2,8 +2,8 @@ import 'package:get_it/get_it.dart';
 
 import 'package:asciineverdie/src/core/di/i_ad_service.dart';
 import 'package:asciineverdie/src/core/di/i_iap_service.dart';
-import 'package:asciineverdie/src/core/engine/ad_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/ad_service.dart';
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 
 /// 전역 서비스 로케이터(service locator) 인스턴스
 final GetIt sl = GetIt.instance;

lib/src/core/engine/character_roll_service.dart

@@ -1,8 +1,8 @@
 import 'package:flutter/foundation.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
-import 'package:asciineverdie/src/core/engine/ad_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/ad_service.dart';
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 import 'package:asciineverdie/src/core/model/game_state.dart';
 
 /// 캐릭터 생성 굴리기/되돌리기 서비스

lib/src/core/engine/debug_settings_service.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/foundation.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 
 /// 디버그 설정 서비스 (Phase 8)
 ///

lib/src/core/engine/return_rewards_service.dart

@@ -1,8 +1,8 @@
 import 'package:flutter/foundation.dart';
 
-import 'package:asciineverdie/src/core/engine/ad_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/ad_service.dart';
 import 'package:asciineverdie/src/core/engine/chest_service.dart';
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 import 'package:asciineverdie/src/core/model/treasure_chest.dart';
 
 /// 복귀 보상 서비스 (Phase 7)

lib/src/core/infrastructure/ad_service.dart

@@ -8,7 +8,7 @@ import 'package:google_mobile_ads/google_mobile_ads.dart';
 import 'package:get_it/get_it.dart';
 
 import 'package:asciineverdie/src/core/di/i_ad_service.dart';
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 
 /// 광고 타입
 enum AdType {

lib/src/features/game/game_play_screen.dart

@@ -4,7 +4,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart' show SchedulerBinding, SchedulerPhase;
 
 import 'package:asciineverdie/data/game_text_l10n.dart' as game_l10n;
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 import 'package:asciineverdie/src/core/model/treasure_chest.dart';
 import 'package:asciineverdie/data/story_data.dart';
 import 'package:asciineverdie/l10n/app_localizations.dart';

lib/src/features/game/game_session_controller.dart

@@ -1,6 +1,6 @@
 import 'dart:async';
 
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 import 'package:asciineverdie/src/core/engine/progress_loop.dart';
 import 'package:asciineverdie/src/core/engine/progress_service.dart';
 import 'package:asciineverdie/src/core/model/game_state.dart';

lib/src/features/game/managers/resurrection_manager.dart

@@ -1,5 +1,5 @@
-import 'package:asciineverdie/src/core/engine/ad_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/ad_service.dart';
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 import 'package:asciineverdie/src/core/engine/resurrection_service.dart';
 import 'package:asciineverdie/src/core/engine/shop_service.dart';
 import 'package:asciineverdie/src/core/model/game_state.dart';

lib/src/features/game/managers/speed_boost_manager.dart

@@ -1,5 +1,5 @@
-import 'package:asciineverdie/src/core/engine/ad_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/ad_service.dart';
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 import 'package:asciineverdie/src/core/engine/progress_loop.dart';
 import 'package:asciineverdie/src/core/model/monetization_state.dart';
 import 'package:flutter/foundation.dart';

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

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 
 import 'package:asciineverdie/data/game_text_l10n.dart' as l10n;
 import 'package:asciineverdie/data/potion_data.dart';
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 import 'package:asciineverdie/src/core/engine/return_rewards_service.dart';
 import 'package:asciineverdie/src/core/model/item_stats.dart';
 import 'package:asciineverdie/src/core/model/treasure_chest.dart';

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

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 
 import 'package:asciineverdie/data/game_text_l10n.dart' as l10n;
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 import 'package:asciineverdie/src/shared/retro_colors.dart';
 
 /// 속도 부스트 버튼 위젯 (Phase 6)

lib/src/features/new_character/new_character_screen.dart

@@ -8,7 +8,7 @@ import 'package:asciineverdie/data/game_text_l10n.dart' as game_l10n;
 import 'package:asciineverdie/data/race_data.dart';
 import 'package:asciineverdie/l10n/app_localizations.dart';
 import 'package:asciineverdie/src/core/engine/character_roll_service.dart';
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 import 'package:asciineverdie/src/core/model/class_traits.dart';
 import 'package:asciineverdie/src/core/model/game_state.dart';
 import 'package:asciineverdie/src/core/model/race_traits.dart';

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

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 
 import 'package:asciineverdie/data/game_text_l10n.dart' as game_l10n;
 import 'package:asciineverdie/l10n/app_localizations.dart';
-import 'package:asciineverdie/src/core/engine/iap_service.dart';
+import 'package:asciineverdie/src/core/infrastructure/iap_service.dart';
 import 'package:asciineverdie/src/shared/retro_colors.dart';
 import 'package:asciineverdie/src/shared/widgets/retro_widgets.dart';