feat: refactor Google Auth handling and improve media file management with enhanced error logging

src/screens/HomeScreen.js

@@ -8,6 +8,7 @@ import DatabaseService from '../services/DatabaseService';
 import DeviceMediaService from '../services/DeviceMediaService';
 import GoogleAUTH from '../AUTH/GoogleAUTH';
 import NASAUTH from '../AUTH/NASAUTH';
+import { File } from 'expo-file-system';
 import TopBar from '../components/TopBar';
 import PhotoGrid from '../components/PhotoGrid';
 import MediaViewer from '../components/MediaViewer';
@@ -132,7 +133,23 @@ const HomeScreen = ({ navigation, route }) => {
       // ─── Previously imported Google Photos (stored in DB) ───
       try {
         const googleMedia = await DatabaseService.getMediaByService(userId, 'GOOGLE_PHOTOS');
-        if (googleMedia?.length) newMedia.push(...googleMedia);
+        if (googleMedia?.length) {
+          // Validate cached files still exist — clear stale paths
+          const validated = googleMedia.map((item) => {
+            if (item.local_path) {
+              try {
+                const f = new File(item.local_path);
+                if (!f.exists || f.size === 0) {
+                  return { ...item, local_path: null };
+                }
+              } catch (_) {
+                return { ...item, local_path: null };
+              }
+            }
+            return item;
+          });
+          newMedia.push(...validated);
+        }
       } catch (err) {
         console.error('DB Google media fetch error:', err);
       }