fix: 针对百度小程序进行css本地资源路径进行处理

packages/vue-cli-plugin-uni/lib/chain-webpack.js

@@ -106,15 +106,17 @@ module.exports = function chainWebpack (platformOptions, vueOptions, api) {
               })
           }
         } else {
+          if (process.env.UNI_PLATFORM === "mp-baidu") {
 						langRule.oneOf(type)
 							.use('extract-css-loader')
 							.tap(options => {
 								// 参考 https://github.com/vuejs/vue-cli/commit/b41ed76c5ce54c618587f24b9d14c35cf31a96d4
 								// 修复 部分平台 css 内的资源路径不正确，如uni-icons在百度小程序上引用的字体文件路径
-              options.publicPath = '/'
+								if (options) options.publicPath = '/'
 								return options
 							})
 					}
+        }
         langRule.oneOf(type)
           .use('uniapp-preprocss')
           .loader(resolve('packages/webpack-preprocess-loader'))