tachiyomi-website/src/.vitepress/theme/index.ts

// https://vitepress.dev/guide/custom-theme
import { h } from "vue";
import Theme from "vitepress/theme";
import "./style.css";

export default {
	extends: Theme,
	Layout: () => {
		return h(Theme.Layout, null, {
			// https://vitepress.dev/guide/extending-default-theme#layout-slots
		});
	},
	enhanceApp({ app, router, siteData }) {
		// ...
	},
};