refactor(ui): 기타 화면 정리

- FrontScreen, HallOfFameScreen 개선
- NewCharacterScreen, SettingsScreen 정리
- App 초기화 로직 정리

lib/src/features/settings/settings_screen.dart

@@ -122,10 +122,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
               children: [
                 Icon(Icons.settings, color: theme.colorScheme.primary),
                 const SizedBox(width: 8),
-                Text(
-                  game_l10n.uiSettings,
-                  style: theme.textTheme.titleLarge,
-                ),
+                Text(game_l10n.uiSettings, style: theme.textTheme.titleLarge),
                 const Spacer(),
                 IconButton(
                   icon: const Icon(Icons.close),
@@ -196,9 +193,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
       padding: const EdgeInsets.only(bottom: 8),
       child: Text(
         title,
-        style: Theme.of(context).textTheme.titleMedium?.copyWith(
-          fontWeight: FontWeight.bold,
-        ),
+        style: Theme.of(
+          context,
+        ).textTheme.titleMedium?.copyWith(fontWeight: FontWeight.bold),
       ),
     );
   }
@@ -292,7 +289,10 @@ class _SettingsScreenState extends State<SettingsScreen> {
             leading: Text(lang.$3, style: const TextStyle(fontSize: 24)),
             title: Text(lang.$2),
             trailing: isSelected
-                ? Icon(Icons.check, color: Theme.of(context).colorScheme.primary)
+                ? Icon(
+                    Icons.check,
+                    color: Theme.of(context).colorScheme.primary,
+                  )
                 : null,
             onTap: () {
               game_l10n.setGameLocale(lang.$1);
@@ -331,16 +331,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
                 children: [
                   Row(
                     mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                    children: [
-                      Text(label),
-                      Text('$percentage%'),
-                    ],
-                  ),
-                  Slider(
-                    value: value,
-                    onChanged: onChanged,
-                    divisions: 10,
+                    children: [Text(label), Text('$percentage%')],
                   ),
+                  Slider(value: value, onChanged: onChanged, divisions: 10),
                 ],
               ),
             ),