refactor(theme): migrate theme config from old version

Related Issue: DevCloudFE#1879

packages/devui-vue/docs/.vitepress/theme/index.ts

@@ -1,13 +1,19 @@
+// https://vitepress.dev/guide/custom-theme
+import { h } from 'vue';
+import type { Theme } from 'vitepress';
+import DefaultTheme from 'vitepress/theme';
+import 'vitepress-theme-demoblock/dist/theme/styles/index.css';
+import { useComponents } from './useComponents';
+
 import editorWorker from 'monaco-editor/esm/vs/editor/editor.worker?worker';
 import jsonWorker from 'monaco-editor/esm/vs/language/json/json.worker?worker';
 import cssWorker from 'monaco-editor/esm/vs/language/css/css.worker?worker';
 import htmlWorker from 'monaco-editor/esm/vs/language/html/html.worker?worker';
 import tsWorker from 'monaco-editor/esm/vs/language/typescript/ts.worker?worker';
+
 import DevUI from '../../../devui/vue-devui';
 import Locale from '../../../devui/locale';
-import Theme from '../devui-theme';
-import 'vitepress-theme-demoblock/theme/styles/index.css';
-import { registerComponents } from './register-components.js';
+import DevUITheme from '../devui-theme';
 import { insertBaiduScript } from './insert-baidu-script';
 
 if (typeof window !== 'undefined') {
@@ -31,10 +37,17 @@ if (typeof window !== 'undefined') {
 }
 
 export default {
-  ...Theme,
-  enhanceApp({ app }) {
-    app.use(Locale).use(DevUI);
-    registerComponents(app);
+  extends: DevUITheme,
+  Layout: () => {
+    return h(DefaultTheme.Layout, null, {
+      // https://vitepress.dev/guide/extending-default-theme#layout-slots
+    });
+  },
+  enhanceApp(ctx) {
+    DefaultTheme.enhanceApp(ctx);
+    useComponents(ctx.app);
+    ctx.app.use(Locale);
+    ctx.app.use(DevUI);
     insertBaiduScript();
   },
-};
+} satisfies Theme;