feat: use Capacitor Geolocation to prompt and get native location on Android

frontend/src/components/AddPhotoModal.tsx

@@ -4,6 +4,7 @@ import { useNotification } from '@/hooks/useNotification';
 import { useTourStore } from '@/store/useTourStore';
 import { processImageModeration } from '@/hooks/useImageModeration';
 import { processAndResizeImage } from '../utils/imageProcessor';
+import { getDeviceLocation } from '../utils/geolocation';
 
 interface AddPhotoModalProps {
   isOpen: boolean;
@@ -38,20 +39,7 @@ export const AddPhotoModal: React.FC<AddPhotoModalProps> = ({ isOpen, onClose, t
 
       try {
         // Fetch device location once to serve as Priority 2 fallback for files without EXIF
-        const deviceLocation = await Promise.race([
-          new Promise<GeolocationPosition | null>((resolve) => {
-            if (!navigator.geolocation) {
-              resolve(null);
-            } else {
-              navigator.geolocation.getCurrentPosition(
-                (pos) => resolve(pos),
-                () => resolve(null),
-                { timeout: 3500, enableHighAccuracy: true }
-              );
-            }
-          }),
-          new Promise<null>((resolve) => setTimeout(() => resolve(null), 4000))
-        ]);
+        const deviceLocation = await getDeviceLocation();
 
         const newValidPhotos: PendingPhoto[] = [];
         const newValidPreviews: string[] = [];
@@ -89,9 +77,9 @@ export const AddPhotoModal: React.FC<AddPhotoModalProps> = ({ isOpen, onClose, t
             let finalLng: number | null = exifLng;
 
             // Priority 2: Device location
-            if ((finalLat === null || finalLng === null) && deviceLocation && deviceLocation.coords) {
-              finalLat = deviceLocation.coords.latitude;
-              finalLng = deviceLocation.coords.longitude;
+            if ((finalLat === null || finalLng === null) && deviceLocation) {
+              finalLat = deviceLocation.latitude;
+              finalLng = deviceLocation.longitude;
             }
 
             // Priority 3: Map view state