refactor(core): 코어 엔진 및 모델 개선

- 애니메이션 시스템 개선
- 오디오 서비스 개선
- 전투/스킬/포션 서비스 개선
- 스토리지 및 저장 시스템 개선
- 모델 클래스 타입 안정성 강화

lib/src/core/engine/combat_calculator.dart

@@ -1,9 +1,9 @@
 import 'dart:math' as math;
 
-import 'package:askiineverdie/src/core/model/combat_result.dart';
-import 'package:askiineverdie/src/core/model/combat_stats.dart';
-import 'package:askiineverdie/src/core/model/monster_combat_stats.dart';
-import 'package:askiineverdie/src/core/util/deterministic_random.dart';
+import 'package:asciineverdie/src/core/model/combat_result.dart';
+import 'package:asciineverdie/src/core/model/combat_stats.dart';
+import 'package:asciineverdie/src/core/model/monster_combat_stats.dart';
+import 'package:asciineverdie/src/core/util/deterministic_random.dart';
 
 /// 전투 계산 서비스
 ///

lib/src/core/engine/game_mutations.dart

@@ -1,8 +1,8 @@
-import 'package:askiineverdie/src/core/engine/item_service.dart';
-import 'package:askiineverdie/src/core/model/equipment_slot.dart';
-import 'package:askiineverdie/src/core/model/game_state.dart';
-import 'package:askiineverdie/src/core/model/pq_config.dart';
-import 'package:askiineverdie/src/core/util/pq_logic.dart' as pq_logic;
+import 'package:asciineverdie/src/core/engine/item_service.dart';
+import 'package:asciineverdie/src/core/model/equipment_slot.dart';
+import 'package:asciineverdie/src/core/model/game_state.dart';
+import 'package:asciineverdie/src/core/model/pq_config.dart';
+import 'package:asciineverdie/src/core/util/pq_logic.dart' as pq_logic;
 
 /// Game state mutations that mirror the original PQ win/reward logic.
 class GameMutations {

lib/src/core/engine/item_service.dart

@@ -1,7 +1,7 @@
-import 'package:askiineverdie/src/core/model/equipment_item.dart';
-import 'package:askiineverdie/src/core/model/equipment_slot.dart';
-import 'package:askiineverdie/src/core/model/item_stats.dart';
-import 'package:askiineverdie/src/core/util/deterministic_random.dart';
+import 'package:asciineverdie/src/core/model/equipment_item.dart';
+import 'package:asciineverdie/src/core/model/equipment_slot.dart';
+import 'package:asciineverdie/src/core/model/item_stats.dart';
+import 'package:asciineverdie/src/core/util/deterministic_random.dart';
 
 /// 아이템 관리 서비스
 ///

lib/src/core/engine/potion_service.dart

@@ -1,5 +1,5 @@
-import 'package:askiineverdie/data/potion_data.dart';
-import 'package:askiineverdie/src/core/model/potion.dart';
+import 'package:asciineverdie/data/potion_data.dart';
+import 'package:asciineverdie/src/core/model/potion.dart';
 
 /// 물약 서비스
 ///

lib/src/core/engine/progress_loop.dart

@@ -1,8 +1,8 @@
 import 'dart:async';
 
-import 'package:askiineverdie/src/core/model/game_state.dart';
-import 'package:askiineverdie/src/core/storage/save_manager.dart';
-import 'package:askiineverdie/src/core/engine/progress_service.dart';
+import 'package:asciineverdie/src/core/model/game_state.dart';
+import 'package:asciineverdie/src/core/storage/save_manager.dart';
+import 'package:asciineverdie/src/core/engine/progress_service.dart';
 
 class AutoSaveConfig {
   const AutoSaveConfig({
@@ -40,11 +40,13 @@ class ProgressLoop {
     DateTime Function()? now,
     this.cheatsEnabled = false,
     this.onPlayerDied,
+    List<int> availableSpeeds = const [1, 5],
   }) : _state = initialState,
        _tickInterval = tickInterval,
        _autoSaveConfig = autoSaveConfig,
        _now = now ?? DateTime.now,
-       _stateController = StreamController<GameState>.broadcast();
+       _stateController = StreamController<GameState>.broadcast(),
+       _availableSpeeds = availableSpeeds.isNotEmpty ? availableSpeeds : [1];
 
   final ProgressService progressService;
   final SaveManager? saveManager;
@@ -60,21 +62,35 @@ class ProgressLoop {
   Timer? _timer;
   int? _lastTickMs;
   int _speedMultiplier = 1;
+  List<int> _availableSpeeds;
 
   GameState get current => _state;
   Stream<GameState> get stream => _stateController.stream;
   GameState _state;
 
-  /// 현재 배속 (1x, 3x, 10x)
+  /// 가용 배속 목록
+  List<int> get availableSpeeds => List.unmodifiable(_availableSpeeds);
+
+  /// 현재 배속 (1x, 2x, 5x)
   int get speedMultiplier => _speedMultiplier;
 
-  /// 배속 순환: 1 -> 3 -> 10 -> 1
+  /// 배속 순환: 가용 배속 목록 순환
+  /// 명예의 전당에 캐릭터 없으면: 1 -> 5 -> 1
+  /// 명예의 전당에 캐릭터 있으면: 1 -> 2 -> 5 -> 1
   void cycleSpeed() {
-    _speedMultiplier = switch (_speedMultiplier) {
-      1 => 3,
-      3 => 10,
-      _ => 1,
-    };
+    final currentIndex = _availableSpeeds.indexOf(_speedMultiplier);
+    final nextIndex = (currentIndex + 1) % _availableSpeeds.length;
+    _speedMultiplier = _availableSpeeds[nextIndex];
+  }
+
+  /// 가용 배속 목록 업데이트 (명예의 전당 상태 변경 시)
+  void updateAvailableSpeeds(List<int> speeds) {
+    if (speeds.isEmpty) return;
+    _availableSpeeds = speeds;
+    // 현재 배속이 새 목록에 없으면 첫 번째로 리셋
+    if (!_availableSpeeds.contains(_speedMultiplier)) {
+      _speedMultiplier = _availableSpeeds.first;
+    }
   }
 
   void start() {

lib/src/core/engine/progress_service.dart

@@ -1,23 +1,23 @@
 import 'dart:math' as math;
 
-import 'package:askiineverdie/data/game_text_l10n.dart' as l10n;
-import 'package:askiineverdie/data/skill_data.dart';
-import 'package:askiineverdie/src/core/engine/combat_calculator.dart';
-import 'package:askiineverdie/src/core/engine/game_mutations.dart';
-import 'package:askiineverdie/src/core/engine/potion_service.dart';
-import 'package:askiineverdie/src/core/engine/reward_service.dart';
-import 'package:askiineverdie/src/core/engine/skill_service.dart';
-import 'package:askiineverdie/src/core/model/combat_event.dart';
-import 'package:askiineverdie/src/core/model/combat_state.dart';
-import 'package:askiineverdie/src/core/model/combat_stats.dart';
-import 'package:askiineverdie/src/core/model/equipment_item.dart';
-import 'package:askiineverdie/src/core/model/equipment_slot.dart';
-import 'package:askiineverdie/src/core/model/game_state.dart';
-import 'package:askiineverdie/src/core/model/monster_combat_stats.dart';
-import 'package:askiineverdie/src/core/model/potion.dart';
-import 'package:askiineverdie/src/core/model/pq_config.dart';
-import 'package:askiineverdie/src/core/model/skill.dart';
-import 'package:askiineverdie/src/core/util/pq_logic.dart' as pq_logic;
+import 'package:asciineverdie/data/game_text_l10n.dart' as l10n;
+import 'package:asciineverdie/data/skill_data.dart';
+import 'package:asciineverdie/src/core/engine/combat_calculator.dart';
+import 'package:asciineverdie/src/core/engine/game_mutations.dart';
+import 'package:asciineverdie/src/core/engine/potion_service.dart';
+import 'package:asciineverdie/src/core/engine/reward_service.dart';
+import 'package:asciineverdie/src/core/engine/skill_service.dart';
+import 'package:asciineverdie/src/core/model/combat_event.dart';
+import 'package:asciineverdie/src/core/model/combat_state.dart';
+import 'package:asciineverdie/src/core/model/combat_stats.dart';
+import 'package:asciineverdie/src/core/model/equipment_item.dart';
+import 'package:asciineverdie/src/core/model/equipment_slot.dart';
+import 'package:asciineverdie/src/core/model/game_state.dart';
+import 'package:asciineverdie/src/core/model/monster_combat_stats.dart';
+import 'package:asciineverdie/src/core/model/potion.dart';
+import 'package:asciineverdie/src/core/model/pq_config.dart';
+import 'package:asciineverdie/src/core/model/skill.dart';
+import 'package:asciineverdie/src/core/util/pq_logic.dart' as pq_logic;
 
 class ProgressTickResult {
   const ProgressTickResult({
@@ -146,9 +146,9 @@ class ProgressService {
 
   /// Tick the timer loop (equivalent to Timer1Timer in the original code).
   ProgressTickResult tick(GameState state, int elapsedMillis) {
-    // 500ms 제한: 5x 배속 (50ms * 5 = 250ms) + 여유 공간
-    // 원본은 100ms 제한이었으나 배속 기능 지원을 위해 확장
-    final int clamped = elapsedMillis.clamp(0, 500).toInt();
+    // 10000ms 제한: 100x 배속 (50ms * 100 = 5000ms) + 여유 공간
+    // 디버그 터보 모드(100x) 지원을 위해 확장
+    final int clamped = elapsedMillis.clamp(0, 10000).toInt();
     var progress = state.progress;
     var queue = state.queue;
     var nextState = state;

lib/src/core/engine/resurrection_service.dart

@@ -1,14 +1,14 @@
 import 'dart:math';
 
-import 'package:askiineverdie/data/class_data.dart';
-import 'package:askiineverdie/data/game_text_l10n.dart' as l10n;
-import 'package:askiineverdie/data/race_data.dart';
-import 'package:askiineverdie/src/core/engine/shop_service.dart';
-import 'package:askiineverdie/src/core/model/class_traits.dart';
-import 'package:askiineverdie/src/core/model/equipment_item.dart';
-import 'package:askiineverdie/src/core/model/equipment_slot.dart';
-import 'package:askiineverdie/src/core/model/game_state.dart';
-import 'package:askiineverdie/src/core/model/race_traits.dart';
+import 'package:asciineverdie/data/class_data.dart';
+import 'package:asciineverdie/data/game_text_l10n.dart' as l10n;
+import 'package:asciineverdie/data/race_data.dart';
+import 'package:asciineverdie/src/core/engine/shop_service.dart';
+import 'package:asciineverdie/src/core/model/class_traits.dart';
+import 'package:asciineverdie/src/core/model/equipment_item.dart';
+import 'package:asciineverdie/src/core/model/equipment_slot.dart';
+import 'package:asciineverdie/src/core/model/game_state.dart';
+import 'package:asciineverdie/src/core/model/race_traits.dart';
 
 /// 부활 시스템 서비스 (Phase 4)
 ///

lib/src/core/engine/reward_service.dart

@@ -1,6 +1,6 @@
-import 'package:askiineverdie/src/core/engine/game_mutations.dart';
-import 'package:askiineverdie/src/core/model/game_state.dart';
-import 'package:askiineverdie/src/core/util/pq_logic.dart';
+import 'package:asciineverdie/src/core/engine/game_mutations.dart';
+import 'package:asciineverdie/src/core/model/game_state.dart';
+import 'package:asciineverdie/src/core/util/pq_logic.dart';
 
 /// Applies quest/act rewards to the GameState using shared RNG.
 class RewardService {

lib/src/core/engine/shop_service.dart

@@ -1,8 +1,8 @@
-import 'package:askiineverdie/src/core/model/equipment_item.dart';
-import 'package:askiineverdie/src/core/model/equipment_slot.dart';
-import 'package:askiineverdie/src/core/model/game_state.dart';
-import 'package:askiineverdie/src/core/model/item_stats.dart';
-import 'package:askiineverdie/src/core/util/deterministic_random.dart';
+import 'package:asciineverdie/src/core/model/equipment_item.dart';
+import 'package:asciineverdie/src/core/model/equipment_slot.dart';
+import 'package:asciineverdie/src/core/model/game_state.dart';
+import 'package:asciineverdie/src/core/model/item_stats.dart';
+import 'package:asciineverdie/src/core/util/deterministic_random.dart';
 
 /// 샵 시스템 서비스 (Phase 4)
 ///

lib/src/core/engine/skill_service.dart

@@ -1,10 +1,10 @@
-import 'package:askiineverdie/data/skill_data.dart';
-import 'package:askiineverdie/src/core/model/combat_stats.dart';
-import 'package:askiineverdie/src/core/model/game_state.dart';
-import 'package:askiineverdie/src/core/model/monster_combat_stats.dart';
-import 'package:askiineverdie/src/core/model/skill.dart';
-import 'package:askiineverdie/src/core/util/deterministic_random.dart';
-import 'package:askiineverdie/src/core/util/roman.dart';
+import 'package:asciineverdie/data/skill_data.dart';
+import 'package:asciineverdie/src/core/model/combat_stats.dart';
+import 'package:asciineverdie/src/core/model/game_state.dart';
+import 'package:asciineverdie/src/core/model/monster_combat_stats.dart';
+import 'package:asciineverdie/src/core/model/skill.dart';
+import 'package:asciineverdie/src/core/util/deterministic_random.dart';
+import 'package:asciineverdie/src/core/util/roman.dart';
 
 /// 스킬 시스템 서비스
 ///

lib/src/core/engine/stat_calculator.dart

@@ -1,7 +1,7 @@
-import 'package:askiineverdie/src/core/model/class_traits.dart';
-import 'package:askiineverdie/src/core/model/combat_stats.dart';
-import 'package:askiineverdie/src/core/model/game_state.dart';
-import 'package:askiineverdie/src/core/model/race_traits.dart';
+import 'package:asciineverdie/src/core/model/class_traits.dart';
+import 'package:asciineverdie/src/core/model/combat_stats.dart';
+import 'package:asciineverdie/src/core/model/game_state.dart';
+import 'package:asciineverdie/src/core/model/race_traits.dart';
 
 /// 스탯 계산기 (stat calculator)
 ///

lib/src/core/engine/story_service.dart

@@ -1,6 +1,6 @@
 import 'dart:async';
 
-import 'package:askiineverdie/data/story_data.dart';
+import 'package:asciineverdie/data/story_data.dart';
 
 /// 스토리 이벤트 타입 (Story Event Type)
 enum StoryEventType {