feat(api,ui,db): add address, guest users, image URLs; update API

- Backend:
  - Add address column to tickets and migration script
  - Create guest users when user_id is missing; accept user_name and address
  - Normalize stored image paths and expose absolute image_url
  - Introduce utils for path normalization and ticket serialization
  - Add CORS configuration for dashboard/emulator origins
  - Tickets API:
    - Serialize via ticket_to_dict with consistent schema
    - Change status update to PATCH /api/tickets/{id}/status with JSON body
    - Add DELETE /api/tickets/{id} with safe file removal
- Dashboard:
  - Fetch tickets from backend, show thumbnails, absolute image URLs
  - Status select + PATCH updates, toasts for feedback
  - Add i18n key btn.viewDetails
- Mobile app:
  - Persist device user_id via SharedPreferences
  - Fetch and merge API tickets; prefer network imageUrl
  - Submit user_name and address; delete via API when available
  - Make location acquisition robust with fallbacks and non-blocking UX
- Android/deps:
  - Disable Geolocator NMEA listener to prevent crashes
  - Downgrade geolocator to ^11.0.0 for stability

BREAKING CHANGE:
- Status endpoint changed from PATCH /api/tickets/{id}?new_status=... to
  PATCH /api/tickets/{id}/status with JSON body: {"status":"in_progress"}.
- /api/tickets and /api/tickets/{id} responses now use "id" (replacing
  "ticket_id"), include "image_url", and normalize fields for clients. Update
  consumers to use the new schema.

lib/screens/report_flow/capture_screen.dart

@@ -54,25 +54,35 @@ class _CaptureScreenState extends State<CaptureScreen> {
 
   Future<void> _processImage(XFile image, ImageSource source) async {
     try {
-      // Get current position (Geolocator.Position)
+      // Get current position (optional - app can work without location)
       final position = await LocationService.getCurrentPosition();
 
-      if (position == null) {
+      // Create location data even if position is null (with default values)
+      LocationData? locationData;
+      if (position != null) {
+        locationData = LocationService.positionToLocationData(position);
+        print('Location acquired: ${locationData.lat}, ${locationData.lng}');
+      } else {
+        // Create a fallback location with zero coordinates
+        // This allows the app to continue working without location
+        locationData = LocationData(lat: 0.0, lng: 0.0, accuracy: null);
+        print(
+          'Using fallback location (0.0, 0.0) - location services unavailable',
+        );
+
+        // Show a non-blocking warning to the user
         if (mounted) {
           ScaffoldMessenger.of(context).showSnackBar(
-            SnackBar(
-              content: const Text(
-                'Unable to get location. Please try again.',
+            const SnackBar(
+              content: Text(
+                'Location unavailable. Report will be created without GPS coordinates.',
               ), // TODO: Move to i18n
+              duration: Duration(seconds: 3),
             ),
           );
         }
-        return;
       }
 
-      // Convert Position -> LocationData (app model)
-      final locationData = LocationService.positionToLocationData(position);
-
       // Generate AI suggestion (seeded deterministic)
       final aiSuggestion = MockAIService.generateSuggestion(
         id: DateTime.now().millisecondsSinceEpoch.toString(),
@@ -113,10 +123,12 @@ class _CaptureScreenState extends State<CaptureScreen> {
         );
       }
     } catch (e) {
+      print('Critical error in image processing: $e');
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(
             content: Text(I18n.t('error.imageProcessing', {'0': e.toString()})),
+            backgroundColor: Colors.red,
           ),
         );
       }