feat(l10n): 국제화(L10n) 시스템 도입 및 하드코딩 텍스트 변환

- flutter_localizations 및 intl 패키지 추가
- l10n.yaml 설정 파일 및 app_ko.arb 메시지 파일 생성
- 모든 화면(app, front, game_play, new_character, save_picker)의 하드코딩 텍스트를 L10n 키로 변환
- 테스트 파일에 localizationsDelegates 추가하여 L10n 지원

lib/src/features/game/game_play_screen.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 
+import 'package:askiineverdie/l10n/app_localizations.dart';
 import 'package:askiineverdie/src/core/animation/ascii_animation_data.dart';
 import 'package:askiineverdie/src/core/animation/ascii_animation_type.dart';
 import 'package:askiineverdie/src/core/model/game_state.dart';
@@ -129,21 +130,22 @@ class _GamePlayScreenState extends State<GamePlayScreen>
 
   /// 뒤로가기 시 저장 확인 다이얼로그
   Future<bool> _onPopInvoked() async {
+    final l10n = L10n.of(context);
     final shouldPop = await showDialog<bool>(
       context: context,
       builder: (context) => AlertDialog(
-        title: const Text('Exit Game'),
-        content: const Text('Save your progress before leaving?'),
+        title: Text(l10n.exitGame),
+        content: Text(l10n.saveProgressQuestion),
         actions: [
           TextButton(
             onPressed: () => Navigator.of(context).pop(false),
-            child: const Text('Cancel'),
+            child: Text(l10n.cancel),
           ),
           TextButton(
             onPressed: () {
               Navigator.of(context).pop(true);
             },
-            child: const Text('Exit without saving'),
+            child: Text(l10n.exitWithoutSaving),
           ),
           FilledButton(
             onPressed: () async {
@@ -152,7 +154,7 @@ class _GamePlayScreenState extends State<GamePlayScreen>
                 Navigator.of(context).pop(true);
               }
             },
-            child: const Text('Save and Exit'),
+            child: Text(l10n.saveAndExit),
           ),
         ],
       ),
@@ -189,23 +191,23 @@ class _GamePlayScreenState extends State<GamePlayScreen>
       },
       child: Scaffold(
         appBar: AppBar(
-          title: Text('Progress Quest - ${state.traits.name}'),
+          title: Text(L10n.of(context).progressQuestTitle(state.traits.name)),
           actions: [
             // 치트 버튼 (디버그용)
             if (widget.controller.cheatsEnabled) ...[
               IconButton(
                 icon: const Text('L+1'),
-                tooltip: 'Level Up',
+                tooltip: L10n.of(context).levelUp,
                 onPressed: () => widget.controller.loop?.cheatCompleteTask(),
               ),
               IconButton(
                 icon: const Text('Q!'),
-                tooltip: 'Complete Quest',
+                tooltip: L10n.of(context).completeQuest,
                 onPressed: () => widget.controller.loop?.cheatCompleteQuest(),
               ),
               IconButton(
                 icon: const Text('P!'),
-                tooltip: 'Complete Plot',
+                tooltip: L10n.of(context).completePlot,
                 onPressed: () => widget.controller.loop?.cheatCompletePlot(),
               ),
             ],
@@ -250,34 +252,35 @@ class _GamePlayScreenState extends State<GamePlayScreen>
 
   /// 좌측 패널: Character Sheet (Traits, Stats, Experience, Spells)
   Widget _buildCharacterPanel(GameState state) {
+    final l10n = L10n.of(context);
     return Card(
       margin: const EdgeInsets.all(4),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.stretch,
         children: [
-          _buildPanelHeader('Character Sheet'),
+          _buildPanelHeader(l10n.characterSheet),
 
           // Traits 목록
-          _buildSectionHeader('Traits'),
+          _buildSectionHeader(l10n.traits),
           _buildTraitsList(state),
 
           // Stats 목록
-          _buildSectionHeader('Stats'),
+          _buildSectionHeader(l10n.stats),
           Expanded(flex: 2, child: _buildStatsList(state)),
 
           // Experience 바
-          _buildSectionHeader('Experience'),
+          _buildSectionHeader(l10n.experience),
           _buildProgressBar(
             state.progress.exp.position,
             state.progress.exp.max,
             Colors.blue,
             tooltip:
                 '${state.progress.exp.max - state.progress.exp.position} '
-                'XP needed for next level',
+                '${l10n.xpNeededForNextLevel}',
           ),
 
           // Spell Book
-          _buildSectionHeader('Spell Book'),
+          _buildSectionHeader(l10n.spellBook),
           Expanded(flex: 2, child: _buildSpellsList(state)),
         ],
       ),
@@ -286,22 +289,23 @@ class _GamePlayScreenState extends State<GamePlayScreen>
 
   /// 중앙 패널: Equipment/Inventory
   Widget _buildEquipmentPanel(GameState state) {
+    final l10n = L10n.of(context);
     return Card(
       margin: const EdgeInsets.all(4),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.stretch,
         children: [
-          _buildPanelHeader('Equipment'),
+          _buildPanelHeader(l10n.equipment),
 
           // Equipment 목록
           Expanded(flex: 2, child: _buildEquipmentList(state)),
 
           // Inventory
-          _buildPanelHeader('Inventory'),
+          _buildPanelHeader(l10n.inventory),
           Expanded(flex: 3, child: _buildInventoryList(state)),
 
           // Encumbrance 바
-          _buildSectionHeader('Encumbrance'),
+          _buildSectionHeader(l10n.encumbrance),
           _buildProgressBar(
             state.progress.encumbrance.position,
             state.progress.encumbrance.max,
@@ -314,12 +318,13 @@ class _GamePlayScreenState extends State<GamePlayScreen>
 
   /// 우측 패널: Plot/Quest
   Widget _buildQuestPanel(GameState state) {
+    final l10n = L10n.of(context);
     return Card(
       margin: const EdgeInsets.all(4),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.stretch,
         children: [
-          _buildPanelHeader('Plot Development'),
+          _buildPanelHeader(l10n.plotDevelopment),
 
           // Plot 목록
           Expanded(child: _buildPlotList(state)),
@@ -334,7 +339,7 @@ class _GamePlayScreenState extends State<GamePlayScreen>
                 : null,
           ),
 
-          _buildPanelHeader('Quests'),
+          _buildPanelHeader(l10n.quests),
 
           // Quest 목록
           Expanded(child: _buildQuestList(state)),
@@ -345,7 +350,10 @@ class _GamePlayScreenState extends State<GamePlayScreen>
             state.progress.quest.max,
             Colors.green,
             tooltip: state.progress.quest.max > 0
-                ? '${(100 * state.progress.quest.position ~/ state.progress.quest.max)}% complete'
+                ? l10n.percentComplete(
+                    100 * state.progress.quest.position ~/
+                        state.progress.quest.max,
+                  )
                 : null,
           ),
         ],
@@ -398,11 +406,12 @@ class _GamePlayScreenState extends State<GamePlayScreen>
   }
 
   Widget _buildTraitsList(GameState state) {
+    final l10n = L10n.of(context);
     final traits = [
-      ('Name', state.traits.name),
-      ('Race', state.traits.race),
-      ('Class', state.traits.klass),
-      ('Level', '${state.traits.level}'),
+      (l10n.traitName, state.traits.name),
+      (l10n.traitRace, state.traits.race),
+      (l10n.traitClass, state.traits.klass),
+      (l10n.traitLevel, '${state.traits.level}'),
     ];
 
     return Padding(
@@ -433,15 +442,16 @@ class _GamePlayScreenState extends State<GamePlayScreen>
   }
 
   Widget _buildStatsList(GameState state) {
+    final l10n = L10n.of(context);
     final stats = [
-      ('STR', state.stats.str),
-      ('CON', state.stats.con),
-      ('DEX', state.stats.dex),
-      ('INT', state.stats.intelligence),
-      ('WIS', state.stats.wis),
-      ('CHA', state.stats.cha),
-      ('HP Max', state.stats.hpMax),
-      ('MP Max', state.stats.mpMax),
+      (l10n.statStr, state.stats.str),
+      (l10n.statCon, state.stats.con),
+      (l10n.statDex, state.stats.dex),
+      (l10n.statInt, state.stats.intelligence),
+      (l10n.statWis, state.stats.wis),
+      (l10n.statCha, state.stats.cha),
+      (l10n.statHpMax, state.stats.hpMax),
+      (l10n.statMpMax, state.stats.mpMax),
     ];
 
     return ListView.builder(
@@ -467,8 +477,8 @@ class _GamePlayScreenState extends State<GamePlayScreen>
 
   Widget _buildSpellsList(GameState state) {
     if (state.spellBook.spells.isEmpty) {
-      return const Center(
-        child: Text('No spells yet', style: TextStyle(fontSize: 11)),
+      return Center(
+        child: Text(L10n.of(context).noSpellsYet, style: const TextStyle(fontSize: 11)),
       );
     }
 
@@ -498,18 +508,19 @@ class _GamePlayScreenState extends State<GamePlayScreen>
 
   Widget _buildEquipmentList(GameState state) {
     // 원본 Main.dfm Equips ListView - 11개 슬롯
+    final l10n = L10n.of(context);
     final equipment = [
-      ('Weapon', state.equipment.weapon),
-      ('Shield', state.equipment.shield),
-      ('Helm', state.equipment.helm),
-      ('Hauberk', state.equipment.hauberk),
-      ('Brassairts', state.equipment.brassairts),
-      ('Vambraces', state.equipment.vambraces),
-      ('Gauntlets', state.equipment.gauntlets),
-      ('Gambeson', state.equipment.gambeson),
-      ('Cuisses', state.equipment.cuisses),
-      ('Greaves', state.equipment.greaves),
-      ('Sollerets', state.equipment.sollerets),
+      (l10n.equipWeapon, state.equipment.weapon),
+      (l10n.equipShield, state.equipment.shield),
+      (l10n.equipHelm, state.equipment.helm),
+      (l10n.equipHauberk, state.equipment.hauberk),
+      (l10n.equipBrassairts, state.equipment.brassairts),
+      (l10n.equipVambraces, state.equipment.vambraces),
+      (l10n.equipGauntlets, state.equipment.gauntlets),
+      (l10n.equipGambeson, state.equipment.gambeson),
+      (l10n.equipCuisses, state.equipment.cuisses),
+      (l10n.equipGreaves, state.equipment.greaves),
+      (l10n.equipSollerets, state.equipment.sollerets),
     ];
 
     return ListView.builder(
@@ -543,10 +554,11 @@ class _GamePlayScreenState extends State<GamePlayScreen>
   }
 
   Widget _buildInventoryList(GameState state) {
+    final l10n = L10n.of(context);
     if (state.inventory.items.isEmpty) {
       return Center(
         child: Text(
-          'Gold: ${state.inventory.gold}',
+          l10n.goldAmount(state.inventory.gold),
           style: const TextStyle(fontSize: 11),
         ),
       );
@@ -559,8 +571,8 @@ class _GamePlayScreenState extends State<GamePlayScreen>
         if (index == 0) {
           return Row(
             children: [
-              const Expanded(
-                child: Text('Gold', style: TextStyle(fontSize: 11)),
+              Expanded(
+                child: Text(l10n.gold, style: const TextStyle(fontSize: 11)),
               ),
               Text(
                 '${state.inventory.gold}',
@@ -594,10 +606,11 @@ class _GamePlayScreenState extends State<GamePlayScreen>
 
   Widget _buildPlotList(GameState state) {
     // 플롯 단계를 표시 (Act I, Act II, ...)
+    final l10n = L10n.of(context);
     final plotCount = state.progress.plotStageCount;
     if (plotCount == 0) {
-      return const Center(
-        child: Text('Prologue', style: TextStyle(fontSize: 11)),
+      return Center(
+        child: Text(l10n.prologue, style: const TextStyle(fontSize: 11)),
       );
     }
 
@@ -615,7 +628,7 @@ class _GamePlayScreenState extends State<GamePlayScreen>
             ),
             const SizedBox(width: 4),
             Text(
-              index == 0 ? 'Prologue' : 'Act ${_toRoman(index)}',
+              index == 0 ? l10n.prologue : l10n.actNumber(_toRoman(index)),
               style: TextStyle(
                 fontSize: 11,
                 decoration: isCompleted
@@ -630,10 +643,11 @@ class _GamePlayScreenState extends State<GamePlayScreen>
   }
 
   Widget _buildQuestList(GameState state) {
+    final l10n = L10n.of(context);
     final questCount = state.progress.questCount;
     if (questCount == 0) {
-      return const Center(
-        child: Text('No active quests', style: TextStyle(fontSize: 11)),
+      return Center(
+        child: Text(l10n.noActiveQuests, style: const TextStyle(fontSize: 11)),
       );
     }
 
@@ -649,7 +663,7 @@ class _GamePlayScreenState extends State<GamePlayScreen>
               child: Text(
                 currentTask.caption.isNotEmpty
                     ? currentTask.caption
-                    : 'Quest #$questCount',
+                    : l10n.questNumber(questCount),
                 style: const TextStyle(fontSize: 11),
                 overflow: TextOverflow.ellipsis,
               ),