feat: Add frontend 401 unauthorized handling and update backend to async Rocket main.

frontend/src/api.ts

@@ -17,6 +17,10 @@ export const apiFetch = async (
   const response = await fetch(url, config);
 
   if (!response.ok) {
+    if (response.status == 401) {
+      localStorage.removeItem("token");
+      window.location.href = "/";
+    }
     throw new Error(`Request failed with status ${response.status}`);
   }