Allow OS notifications

lib/utils/notification_permission.dart

@@ -0,0 +1,23 @@
+import 'package:permission_handler/permission_handler.dart';
+
+import '../services/permission_service.dart';
+
+/// Helpers for requesting and checking the platform notification permission.
+///
+/// This file exists mostly for backwards‑compatibility; the real logic lives in
+/// [permission_service].
+
+Future<PermissionStatus> requestNotificationPermission() async {
+  return requestPermission(Permission.notification);
+}
+
+Future<bool> ensureNotificationPermission() async {
+  final status = await Permission.notification.status;
+  if (status.isGranted) return true;
+  if (status.isDenied || status.isRestricted || status.isLimited) {
+    final newStatus = await requestNotificationPermission();
+    return newStatus.isGranted;
+  }
+  // permanently denied requires user to open settings
+  return false;
+}