Revert to popup for Google sign-in, fix loading loop

index.html

@@ -633,7 +633,7 @@
 <script src="config.js"></script>
 <script type="module">
 import { initializeApp } from 'https://www.gstatic.com/firebasejs/10.12.0/firebase-app.js';
-import { getAuth, isSignInWithEmailLink, signInWithEmailLink, signInWithRedirect, getRedirectResult, GoogleAuthProvider, signOut as fbSignOut, onAuthStateChanged } from 'https://www.gstatic.com/firebasejs/10.12.0/firebase-auth.js';
+import { getAuth, isSignInWithEmailLink, signInWithEmailLink, signInWithPopup, GoogleAuthProvider, signOut as fbSignOut, onAuthStateChanged } from 'https://www.gstatic.com/firebasejs/10.12.0/firebase-auth.js';
 import { getFirestore, doc, getDoc, setDoc, updateDoc, deleteField, collection, query, where, getDocs, addDoc, onSnapshot, serverTimestamp } from 'https://www.gstatic.com/firebasejs/10.12.0/firebase-firestore.js';
 
 if (!window.STEPMATES_CONFIG) {
@@ -731,18 +731,7 @@ function getFriendDisplayName(uid) {
 }
 
 // AUTH
-let _handlingRedirect = false;
-
-getRedirectResult(auth).then(async (result) => {
-  if (result?.user) {
-    _handlingRedirect = true;
-    await initUser(result.user);
-  }
-}).catch(e => console.warn('Redirect result error:', e.code));
-
 onAuthStateChanged(auth, async (user) => {
-  if (_handlingRedirect) return;
-
   if (isSignInWithEmailLink(auth, window.location.href)) {
     const urlParams = new URLSearchParams(window.location.search);
     const email = urlParams.get('email') || localStorage.getItem('emailForSignIn');
@@ -1316,14 +1305,17 @@ window.signInWithGoogle = async function() {
   btn.innerHTML = '<span class="spinner" style="color:#4285F4"></span> Signing in…';
   try {
     const provider = new GoogleAuthProvider();
-    await signInWithRedirect(auth, provider);
+    const result = await signInWithPopup(auth, provider);
+    await initUser(result.user);
   } catch(e) {
     btn.disabled = false;
     btn.innerHTML = `<svg width="18" height="18" viewBox="0 0 18 18" style="flex-shrink:0"><path fill="#4285F4" d="M17.64 9.2c0-.637-.057-1.251-.164-1.84H9v3.481h4.844c-.209 1.125-.843 2.078-1.796 2.717v2.258h2.908c1.702-1.567 2.684-3.875 2.684-6.615z"/><path fill="#34A853" d="M9 18c2.43 0 4.467-.806 5.956-2.184l-2.908-2.258c-.806.54-1.837.86-3.048.86-2.344 0-4.328-1.584-5.036-3.711H.957v2.332C2.438 15.983 5.482 18 9 18z"/><path fill="#FBBC05" d="M3.964 10.707c-.18-.54-.282-1.117-.282-1.707s.102-1.167.282-1.707V4.961H.957C.347 6.175 0 7.55 0 9s.348 2.825.957 4.039l3.007-2.332z"/><path fill="#EA4335" d="M9 3.58c1.321 0 2.508.454 3.44 1.345l2.582-2.58C13.463.891 11.426 0 9 0 5.482 0 2.438 2.017.957 4.961L3.964 7.293C4.672 5.166 6.656 3.58 9 3.58z"/></svg> Sign in with Google`;
-    document.getElementById('auth-error').textContent = 'Google sign-in failed. Please try again.';
+    if (e.code !== 'auth/popup-closed-by-user' && e.code !== 'auth/cancelled-popup-request') {
+      document.getElementById('auth-error').textContent = 'Google sign-in failed. Please try again or use email.';
       document.getElementById('auth-error').style.display = 'block';
     }
   }
+}
 
 window.showAuthForm = function() {
   document.getElementById('auth-card').style.display = 'block';