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.

pubspec.lock

@@ -217,10 +217,10 @@ packages:
     dependency: "direct main"
     description:
       name: geolocator
-      sha256: "149876cc5207a0f5daf4fdd3bfcf0a0f27258b3fe95108fa084f527ad0568f1b"
+      sha256: "6cb9fb6e5928b58b9a84bdf85012d757fd07aab8215c5205337021c4999bad27"
       url: "https://pub.dev"
     source: hosted
-    version: "12.0.0"
+    version: "11.1.0"
   geolocator_android:
     dependency: transitive
     description:
@@ -249,10 +249,10 @@ packages:
     dependency: transitive
     description:
       name: geolocator_web
-      sha256: b1ae9bdfd90f861fde8fd4f209c37b953d65e92823cb73c7dee1fa021b06f172
+      sha256: "49d8f846ebeb5e2b6641fe477a7e97e5dd73f03cbfef3fd5c42177b7300fb0ed"
       url: "https://pub.dev"
     source: hosted
-    version: "4.1.3"
+    version: "3.0.0"
   geolocator_windows:
     dependency: transitive
     description: