Add: redirect logged in users to / from login page

frontend/src/components/partials/LoginForm.tsx

@@ -23,6 +23,13 @@ export function LoginForm({
     const [loading, setLoading] = useState(false);
     const [error, setError] = useState<string | null>(null);
 
+    // Redirect if already logged in
+    useEffect(() => {
+        const token = localStorage.getItem("access_token");
+        if (token) {
+            navigate("/", { replace: true }); // Redirect to homepage
+        }
+    }, [navigate]);
 
     const handelLogin = async (e) => {
         e.preventDefault();