fix(ad): 스크린샷 모드에서 네이티브 광고 비활성화

lib/data/repositories/settings_repository_impl.dart

@@ -12,6 +12,7 @@ class SettingsRepositoryImpl implements SettingsRepository {
   static const String _keyNotificationDelayMinutes =
       'notification_delay_minutes';
   static const String _keyNotificationEnabled = 'notification_enabled';
+  static const String _keyScreenshotModeEnabled = 'screenshot_mode_enabled';
   static const String _keyDarkModeEnabled = 'dark_mode_enabled';
   static const String _keyFirstRun = 'first_run';
   static const String _keyCategoryWeights = 'category_weights';
@@ -22,6 +23,7 @@ class SettingsRepositoryImpl implements SettingsRepository {
   static const int _defaultMaxDistanceNormal = 1000;
   static const int _defaultNotificationDelayMinutes = 90;
   static const bool _defaultNotificationEnabled = true;
+  static const bool _defaultScreenshotModeEnabled = false;
   static const bool _defaultDarkModeEnabled = false;
   static const bool _defaultFirstRun = true;
 
@@ -155,6 +157,21 @@ class SettingsRepositoryImpl implements SettingsRepository {
     await box.put(_keyNotificationEnabled, enabled);
   }
 
+  @override
+  Future<bool> isScreenshotModeEnabled() async {
+    final box = await _box;
+    return box.get(
+      _keyScreenshotModeEnabled,
+      defaultValue: _defaultScreenshotModeEnabled,
+    );
+  }
+
+  @override
+  Future<void> setScreenshotModeEnabled(bool enabled) async {
+    final box = await _box;
+    await box.put(_keyScreenshotModeEnabled, enabled);
+  }
+
   @override
   Future<bool> isDarkModeEnabled() async {
     final box = await _box;
@@ -193,6 +210,7 @@ class SettingsRepositoryImpl implements SettingsRepository {
       _defaultNotificationDelayMinutes,
     );
     await box.put(_keyNotificationEnabled, _defaultNotificationEnabled);
+    await box.put(_keyScreenshotModeEnabled, _defaultScreenshotModeEnabled);
     await box.put(_keyDarkModeEnabled, _defaultDarkModeEnabled);
     await box.put(_keyFirstRun, false); // 리셋 후에는 첫 실행이 아님
   }
@@ -215,6 +233,7 @@ class SettingsRepositoryImpl implements SettingsRepository {
       _keyMaxDistanceNormal: await getMaxDistanceNormal(),
       _keyNotificationDelayMinutes: await getNotificationDelayMinutes(),
       _keyNotificationEnabled: await isNotificationEnabled(),
+      _keyScreenshotModeEnabled: await isScreenshotModeEnabled(),
       _keyDarkModeEnabled: await isDarkModeEnabled(),
       _keyFirstRun: await isFirstRun(),
     };