refactor: extract Button to component, reformat all files with Prettier

frontend/pages/edit/member/[member]/index.tsx

@@ -1,3 +1,3 @@
 export default function EditMember() {
-    return <>Editing a member!</>;
-}
+  return <>Editing a member!</>;
+}

frontend/pages/edit/member/index.tsx

@@ -3,10 +3,10 @@ import { useEffect } from "react";
 import Loading from "../../../components/Loading";
 
 export default function Redirect() {
-    const router = useRouter();
-    useEffect(() => {
-        router.push("/")
-    }, [])
+  const router = useRouter();
+  useEffect(() => {
+    router.push("/");
+  }, []);
 
-    return <Loading />;
-}
+  return <Loading />;
+}