feat(frontend): added account and appearance tabs

7project/frontend/src/App.tsx

@@ -8,6 +8,18 @@ function App() {
   const [hasToken, setHasToken] = useState<boolean>(!!localStorage.getItem('token'));
 
   useEffect(() => {
+    // Handle OAuth callback: /oauth-callback?access_token=...&token_type=...
+    if (window.location.pathname === '/oauth-callback') {
+      const params = new URLSearchParams(window.location.search);
+      const token = params.get('access_token');
+      if (token) {
+        localStorage.setItem('token', token);
+        setHasToken(true);
+      }
+      // Clean URL and redirect to home
+      window.history.replaceState({}, '', '/');
+    }
+
     const onStorage = (e: StorageEvent) => {
       if (e.key === 'token') setHasToken(!!e.newValue);
     };