fix(i18n): VictoryOverlay 번역 및 개선

- 일본어/중국어 번역 수정
- game_text_l10n 번역 데이터 정리
- VictoryOverlay 레이아웃 개선
- GameSessionController 상태 관리 개선

lib/l10n/app_ja.arb

@@ -16,7 +16,7 @@
   "saveProgressQuestion": "Save your progress before leaving?",
   "exitWithoutSaving": "Exit without saving",
   "saveAndExit": "Save and Exit",
-  "progressQuestTitle": "Progress Quest - {name}",
+  "progressQuestTitle": "ASCII NEVER DIE - {name}",
   "levelUp": "Level Up",
   "completeQuest": "Complete Quest",
   "completePlot": "Complete Plot",
@@ -62,7 +62,7 @@
   "actNumber": "Act {number}",
   "noActiveQuests": "No active quests",
   "questNumber": "Quest #{number}",
-  "welcomeMessage": "Welcome to Progress Quest!",
+  "welcomeMessage": "ASCII NEVER DIEへようこそ！",
   "noSavedGames": "No saved games found.",
   "loadError": "Failed to load save file: {error}",
   "name": "Name",

lib/l10n/app_localizations_ja.dart

@@ -55,7 +55,7 @@ class L10nJa extends L10n {
 
   @override
   String progressQuestTitle(String name) {
-    return 'Progress Quest - $name';
+    return 'ASCII NEVER DIE - $name';
   }
 
   @override
@@ -200,7 +200,7 @@ class L10nJa extends L10n {
   }
 
   @override
-  String get welcomeMessage => 'Welcome to Progress Quest!';
+  String get welcomeMessage => 'ASCII NEVER DIEへようこそ！';
 
   @override
   String get noSavedGames => 'No saved games found.';

lib/l10n/app_localizations_zh.dart

@@ -55,7 +55,7 @@ class L10nZh extends L10n {
 
   @override
   String progressQuestTitle(String name) {
-    return 'Progress Quest - $name';
+    return 'ASCII NEVER DIE - $name';
   }
 
   @override
@@ -200,7 +200,7 @@ class L10nZh extends L10n {
   }
 
   @override
-  String get welcomeMessage => 'Welcome to Progress Quest!';
+  String get welcomeMessage => '欢迎来到ASCII NEVER DIE！';
 
   @override
   String get noSavedGames => 'No saved games found.';

lib/l10n/app_zh.arb

@@ -16,7 +16,7 @@
   "saveProgressQuestion": "Save your progress before leaving?",
   "exitWithoutSaving": "Exit without saving",
   "saveAndExit": "Save and Exit",
-  "progressQuestTitle": "Progress Quest - {name}",
+  "progressQuestTitle": "ASCII NEVER DIE - {name}",
   "levelUp": "Level Up",
   "completeQuest": "Complete Quest",
   "completePlot": "Complete Plot",
@@ -62,7 +62,7 @@
   "actNumber": "Act {number}",
   "noActiveQuests": "No active quests",
   "questNumber": "Quest #{number}",
-  "welcomeMessage": "Welcome to Progress Quest!",
+  "welcomeMessage": "欢迎来到ASCII NEVER DIE！",
   "noSavedGames": "No saved games found.",
   "loadError": "Failed to load save file: {error}",
   "name": "Name",