chore(uniapp): fix live demo of preview site (#4549)

* ci(uniapp): 完善预览站点构建及配置

* fix(site): 修复预览模式移动端路径前缀

Author: liweijie0812

.github/workflows/preview-site-build.yml

@@ -74,8 +74,12 @@ jobs:
 
       - run: pnpm install
 
+      - run: pnpm run uniapp build:npm
+
       - run: pnpm -C packages/tdesign-uniapp/site run site:preview
 
+      - run: pnpm -C packages/tdesign-uniapp/example run build:h5 --mode=preview
+
       - uses: actions/upload-artifact@v4
         with:
           name: tdesign-uniapp-site

packages/tdesign-uniapp/example/.env.preview

@@ -0,0 +1 @@
+VUE_APP_PUBLICPATH = /live

packages/tdesign-uniapp/site/web/plugins/plugin-tdoc/md-to-vue.js

@@ -19,8 +19,11 @@ const DEFAULT_EN_TABS = [
 ];
 
 function getMobilePrefix(mode) {
+  if (mode === 'production') {
+    return 'https://static.tdesign.tencent.com/uniapp/live';
+  }
   if (mode === 'preview') {
-    return 'https://tdesign.tencent.com/uniapp/live';
+    return '/live/index.html';
   }
   // 开发环境使用相对路径，通过站点服务的代理访问
   return '/uniapp/live';