enhance Google OAuth handling by adding deep link redirect support; update comments for clarity

App.js

@@ -4,6 +4,7 @@ import { NavigationContainer } from '@react-navigation/native';
 import { createNativeStackNavigator } from '@react-navigation/native-stack';
 import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';
 import { ActivityIndicator, View, Text, TouchableOpacity } from 'react-native';
+import * as WebBrowser from 'expo-web-browser';
 import { ThemeProvider, useTheme } from './src/services/ThemeContext';
 import DatabaseService from './src/services/DatabaseService';
 import LoginScreen from './src/screens/LoginScreen';
@@ -14,6 +15,9 @@ import SearchScreen from './src/screens/SearchScreen';
 import CollectionsScreen from './src/screens/AlbumsScreen';
 import SettingsScreen from './src/screens/SettingsScreen';
 
+// Required for OAuth deep link redirect to close the browser and return to the app
+WebBrowser.maybeCompleteAuthSession();
+
 const Stack = createNativeStackNavigator();
 const Tab = createBottomTabNavigator();
 

src/AUTH/GoogleAUTH.js

@@ -6,10 +6,9 @@ WebBrowser.maybeCompleteAuthSession();
 
 const GOOGLE_CLIENT_ID = '313090284964-rgq1u7np6ogucu9o97s134n5nc6nj7kf.apps.googleusercontent.com';
 
-// makeRedirectUri uses the scheme from app.json ("media-aggregation") to build
-// the deep link URI that Android will route back into the app after OAuth.
-// The resulting URI is: media-aggregation://  (registered in Google Cloud Console)
-// For Expo Go dev testing the loopback http://localhost is used instead.
+// Builds the deep link redirect URI from the scheme defined in app.json ("media-aggregation").
+// On an Android APK this resolves to: media-aggregation://
+// Register this URI in Google Cloud Console → Authorized redirect URIs.
 const REDIRECT_URI = AuthSession.makeRedirectUri({ scheme: 'media-aggregation' });
 
 const GOOGLE_DISCOVERY = {
@@ -91,7 +90,7 @@ class GoogleAUTH extends AuthServiceBase {
       return {
         success: true,
         accessToken: this.accessToken,
-        refreshToken: null,
+        refreshToken: this.refreshToken,
         email: this.email,
       };
     } catch (error) {