fixed vite theme plugin

apps/vue/build/vite/plugin/theme.ts

@@ -20,8 +20,8 @@ export function configThemePlugin(isBuild: boolean): PluginOption[] {
     mixLighten,
     tinycolor,
   });
-  const plugin = [
+  // 抽取出viteThemePlugin插件，下方会根据不同环境设置enforce
-    viteThemePlugin({
+  const vite_theme_plugin = viteThemePlugin({
     resolveSelector: (s) => {
       s = s.trim();
       switch (s) {
@@ -44,7 +44,18 @@ export function configThemePlugin(isBuild: boolean): PluginOption[] {
       return s.startsWith('[data-theme') ? s : `[data-theme] ${s}`;
     },
     colorVariables: [...getThemeColors(), ...colors],
-    }),
+  });
+  vite_theme_plugin.forEach(function (item) {
+    //对vite:theme插件特殊配置
+    if ('vite:theme' === item.name) {
+      // 打包时去除enforce: "post"，vite 2.6.x适配，否则生成app-theme-style为空，因为async transform(code, id) {的code没有正确获取
+      if (isBuild) {
+        delete item.enforce;
+      }
+    }
+  });
+  const plugin = [
+    vite_theme_plugin,
     antdDarkThemePlugin({
       preloadFiles: [
         path.resolve(process.cwd(), 'node_modules/ant-design-vue/dist/antd.less'),