chore: prefer named exports (#8315)

* chore: prefer named exports

* chore: fix import

src/switch/Switch.tsx

@@ -1,7 +1,7 @@
 import { defineComponent } from 'vue';
 import { createNamespace, addUnit, UnknownProp } from '../utils';
 import { useLinkField } from '../composables/use-link-field';
-import Loading from '../loading';
+import { Loading } from '../loading';
 
 const [name, bem] = createNamespace('switch');
 

src/switch/demo/index.vue

@@ -39,7 +39,7 @@
 <script lang="ts">
 import { reactive, toRefs } from 'vue';
 import { useTranslate } from '@demo/use-translate';
-import Dialog from '../../dialog';
+import { Dialog } from '../../dialog';
 
 const i18n = {
   'zh-CN': {

src/switch/test/index.spec.ts

@@ -1,4 +1,4 @@
-import Switch from '..';
+import { Switch } from '..';
 import { mount } from '../../../test';
 
 test('should emit update:modelValue event when click the switch button', async () => {