chore: add create shortcut button when not found

frontend/web/src/routers/index.tsx

@@ -1,4 +1,5 @@
 import { createBrowserRouter } from "react-router-dom";
+import NotFound from "@/pages/NotFound";
 import SignIn from "@/pages/SignIn";
 import SignUp from "@/pages/SignUp";
 import SubscriptionSetting from "@/pages/SubscriptionSetting";
@@ -53,6 +54,10 @@ const router = createBrowserRouter([
           },
         ],
       },
+      {
+        path: "*",
+        element: <NotFound />,
+      },
     ],
   },
 ]);