move old contents in

docs/.vitepress/theme/index.ts

@@ -1,17 +1,24 @@
-// https://vitepress.dev/guide/custom-theme
-import { h } from 'vue'
-import type { Theme } from 'vitepress'
-import DefaultTheme from 'vitepress/theme'
-import './style.css'
+import "./style.css";
+import "./custom.css";
 
+import DefaultTheme from "vitepress/theme";
+// https://vitepress.dev/guide/custom-theme
+import { h } from "vue";
+
+import SentenceQuiz from "./components/SentenceQuiz.vue";
+import TOC from "./components/TOC.vue";
+
+import type { Theme } from "vitepress";
 export default {
   extends: DefaultTheme,
   Layout: () => {
     return h(DefaultTheme.Layout, null, {
       // https://vitepress.dev/guide/extending-default-theme#layout-slots
-    })
+    });
   },
   enhanceApp({ app, router, siteData }) {
     // ...
-  }
-} satisfies Theme
+    app.component("SentenceQuiz", SentenceQuiz);
+    app.component("TOC", TOC);
+  },
+} satisfies Theme;