Fix local dev config and ALOTTTT OFF FLUTTER, im tired boss..

walkguide-mobile/walkguide_app/lib/features/navigation_mode/navigation_mode_screen.dart

@@ -16,6 +16,7 @@ import 'package:latlong2/latlong.dart';
 import '../../app/injection_container.dart';
 import '../../core/network/api_client.dart';
 import '../../core/services/tts_service.dart';
+import '../../core/utils/operation_guard.dart';
 
 // ─── helpers ────────────────────────────────────────────────────────────────
 
@@ -70,7 +71,8 @@ class _NavState extends Cubit<int> {
   // ── locate ──────────────────────────────────────────────────────────────
   Future<bool> locate() async {
     _set(_NavPhase.locating, 'Mencari lokasi GPS…');
-    try {
+    final located = await guarded<bool>(
+      () async {
       LocationPermission perm = await Geolocator.checkPermission();
       if (perm == LocationPermission.denied) {
         perm = await Geolocator.requestPermission();
@@ -86,14 +88,12 @@ class _NavState extends Cubit<int> {
       _set(_NavPhase.idle, 'Lokasi ditemukan. Cari tujuan atau ketuk peta.');
       _reportToBackend(pos);
       return true;
-    } on TimeoutException {
-      _set(_NavPhase.error, 'GPS timeout. Pastikan GPS aktif.');
-      return false;
-    } catch (e) {
-      _set(_NavPhase.error,
-          'Lokasi belum bisa dibaca. Pastikan GPS dan izin lokasi aktif.');
-      return false;
-    }
+      },
+      onTimeout: () => _set(_NavPhase.error, 'GPS timeout. Pastikan GPS aktif.'),
+      onError: (_) => _set(_NavPhase.error,
+          'Lokasi belum bisa dibaca. Pastikan GPS dan izin lokasi aktif.'),
+    );
+    return located ?? false;
   }
 
   void _reportToBackend(Position pos) {
@@ -112,7 +112,8 @@ class _NavState extends Cubit<int> {
   // ── search Nominatim ─────────────────────────────────────────────────────
   Future<List<_Place>> searchPlaces(String query) async {
     if (query.trim().isEmpty) return const [];
-    try {
+    return await guarded<List<_Place>>(
+      () async {
       final res = await Dio().get(
         'https://nominatim.openstreetmap.org/search',
         queryParameters: {
@@ -137,9 +138,8 @@ class _NavState extends Cubit<int> {
           position: LatLng(lat, lng),
         );
       }).toList();
-    } catch (_) {
-      return const [];
-    }
+      },
+    ) ?? const [];
   }
 
   String _viewbox(LatLng c) =>
@@ -147,7 +147,8 @@ class _NavState extends Cubit<int> {
 
   // ── reverse geocode ──────────────────────────────────────────────────────
   Future<String> reverseGeocode(LatLng pos) async {
-    try {
+    return await guarded<String>(
+      () async {
       final res = await Dio().get(
         'https://nominatim.openstreetmap.org/reverse',
         queryParameters: {
@@ -162,9 +163,9 @@ class _NavState extends Cubit<int> {
       );
       return res.data['display_name']?.toString() ??
           '${pos.latitude.toStringAsFixed(5)}, ${pos.longitude.toStringAsFixed(5)}';
-    } catch (_) {
-      return '${pos.latitude.toStringAsFixed(5)}, ${pos.longitude.toStringAsFixed(5)}';
-    }
+      },
+    ) ??
+        '${pos.latitude.toStringAsFixed(5)}, ${pos.longitude.toStringAsFixed(5)}';
   }
 
   // ── OSRM routing ─────────────────────────────────────────────────────────
@@ -177,7 +178,8 @@ class _NavState extends Cubit<int> {
     _set(_NavPhase.routing, 'Menghitung rute ke ${_shortName(dest)}…');
 
     final origin = currentPosition!;
-    try {
+    await guarded<void>(
+      () async {
       final url = 'http://router.project-osrm.org/route/v1/foot/'
           '${origin.longitude},${origin.latitude};'
           '${dest.position.longitude},${dest.position.latitude}'
@@ -219,10 +221,10 @@ class _NavState extends Cubit<int> {
           steps.isNotEmpty ? steps[0].instruction : 'Ikuti rute biru.');
       _notify();
       _startTracking();
-    } catch (e) {
-      _set(_NavPhase.error,
-          'Gagal mendapat rute. Periksa koneksi lalu coba lagi.');
-    }
+      },
+      onError: (_) => _set(_NavPhase.error,
+          'Gagal mendapat rute. Periksa koneksi lalu coba lagi.'),
+    );
   }
 
   String _shortName(_Place p) {

walkguide-mobile/walkguide_app/lib/features/navigation_mode/presentation/screens/navigation_mode_screen.dart

@@ -0,0 +1 @@
+export '../../navigation_mode_screen.dart';