fallback sign in flow

src/pages/LoginPage.tsx

@@ -5,7 +5,7 @@ import { GoogleSignInButton } from '../components/GoogleSignInButton'
 import { TreeAnimation } from '../components/TreeAnimation'
 
 export default function LoginPage() {
-  const { user, loading, signInWithGoogle } = useAuth()
+  const { user, loading, signInWithGoogle, authError } = useAuth()
   const navigate = useNavigate()
   const [signingIn, setSigningIn] = useState(false)
   const [error, setError] = useState<string | null>(null)
@@ -63,8 +63,8 @@ export default function LoginPage() {
           <div className="lp__actions">
             <GoogleSignInButton loading={signingIn} onClick={handleGoogleSignIn} />
             <p className="lp__privacy">🔒 End-to-end encrypted. We never read your entries.</p>
-            {error && (
-              <p className="lp__error" role="alert">{error}</p>
+            {(error || authError) && (
+              <p className="lp__error" role="alert">{error || authError}</p>
             )}
           </div>
         </div>