feat: 优化pageloading

src/components/PageLoading/index.jsx

@@ -1,4 +1,11 @@
-import { PageLoading } from '@ant-design/pro-layout' // loading components from code split
+// import { PageLoading } from '@ant-design/pro-layout' // loading components from code split
+import { Spin } from 'antd'
 // https://umijs.org/plugin/umi-plugin-react.html#dynamicimport
+import './index.less'
 
+const PageLoading = () => (
+  <div className="fixed top-1/2 left-1/2 flex justify-center aspin">
+    <Spin size="large" />
+  </div>
+)
 export default PageLoading

src/components/PageLoading/index.less

@@ -0,0 +1,3 @@
+.aspin {
+  transform: translate(-50%, -50%);
+}