offline options globally toggleable

lib/main.dart

@@ -17,12 +17,44 @@ import 'services/localization_service.dart';
 import 'services/provider_tile_cache_manager.dart';
 import 'services/version_service.dart';
 import 'services/deep_link_service.dart';
+import 'services/deflock_tile_provider.dart' show TileLoadCancelledException, TileNotAvailableOfflineException;
 
-
+/// Suppress console noise for expected, already-handled tile load errors.
+///
+/// [TileLoadCancelledException] (tile scrolled off screen) and
+/// [TileNotAvailableOfflineException] (no cached data available) are thrown
+/// deliberately by DeflockOfflineTileImageProvider and are already handled —
+/// TileLayerManager.onTileLoadError() specifically skips retry logic for
+/// both. Flutter's image pipeline reports them via
+/// MultiFrameImageStreamCompleter with `silent: true`, but
+/// FlutterError.dumpErrorToConsole has a debug-mode assert() that ignores
+/// the silent flag and always prints to console anyway. This filters those
+/// two specific, expected exception types back out while leaving all other
+/// errors (including genuinely silent-but-unexpected ones) reported as
+/// normal.
+void _installTileErrorFilter() {
+  final defaultOnError = FlutterError.onError;
+  FlutterError.onError = (FlutterErrorDetails details) {
+    final exception = details.exception;
+    if (details.silent &&
+        (exception is TileLoadCancelledException ||
+            exception is TileNotAvailableOfflineException)) {
+      return; // Already handled — don't spam the console.
+    }
+    if (defaultOnError != null) {
+      defaultOnError(details);
+    } else {
+      FlutterError.presentError(details);
+    }
+  };
+}
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
 
+  _installTileErrorFilter();
+
+
   // Initialize version service
   await VersionService().init();