fe/pages/_app.tsx

import type { ReactElement, ReactNode } from "react";
import type { NextPage } from "next";
import type { AppProps } from "next/app";
import Layout from "../components/common/Layout";
import "../styles/globals.scss";

export type NextPageWithLayout<P = {}, IP = P> = NextPage<P, IP> & {
  getLayout?: (page: ReactElement) => ReactNode;
};

type AppPropsWithLayout = AppProps & {
  Component: NextPageWithLayout;
};

function defaultGetLayout(page: ReactElement): ReactNode {
  return <Layout>{page}</Layout>;
}

export default function MyApp({ Component, pageProps }: AppPropsWithLayout) {
  const getLayout = Component.getLayout ?? defaultGetLayout;

  return getLayout(<Component {...pageProps} />);
}