fix(ad): 스크린샷 모드에서 네이티브 광고 비활성화

lib/presentation/providers/settings_provider.dart

@@ -33,6 +33,12 @@ final notificationEnabledProvider = FutureProvider<bool>((ref) async {
   return repository.isNotificationEnabled();
 });
 
+/// 스크린샷 모드 활성화 여부 Provider
+final screenshotModeEnabledProvider = FutureProvider<bool>((ref) async {
+  final repository = ref.watch(settingsRepositoryProvider);
+  return repository.isScreenshotModeEnabled();
+});
+
 /// 다크모드 활성화 여부 Provider
 final darkModeEnabledProvider = FutureProvider<bool>((ref) async {
   final repository = ref.watch(settingsRepositoryProvider);
@@ -124,6 +130,17 @@ class SettingsNotifier extends StateNotifier<AsyncValue<void>> {
     }
   }
 
+  /// 스크린샷 모드 설정
+  Future<void> setScreenshotModeEnabled(bool enabled) async {
+    state = const AsyncValue.loading();
+    try {
+      await _repository.setScreenshotModeEnabled(enabled);
+      state = const AsyncValue.data(null);
+    } catch (e, stack) {
+      state = AsyncValue.error(e, stack);
+    }
+  }
+
   /// 다크모드 설정
   Future<void> setDarkModeEnabled(bool enabled) async {
     state = const AsyncValue.loading();