chore: prefer named exports (#8315)

* chore: prefer named exports

* chore: fix import

src/coupon-list/CouponList.tsx

@@ -16,11 +16,11 @@ import { useWindowSize } from '@vant/use';
 import { useRefs } from '../composables/use-refs';
 
 // Components
-import Tab from '../tab';
-import Tabs from '../tabs';
-import Field from '../field';
-import Button from '../button';
-import Coupon, { CouponInfo } from '../coupon';
+import { Tab } from '../tab';
+import { Tabs } from '../tabs';
+import { Field } from '../field';
+import { Button } from '../button';
+import { Coupon, CouponInfo } from '../coupon';
 
 const [name, bem, t] = createNamespace('coupon-list');
 const EMPTY_IMAGE = 'https://img.yzcdn.cn/vant/coupon-empty.png';

src/coupon-list/demo/index.vue

@@ -27,7 +27,7 @@
 import { computed, reactive, toRefs } from 'vue';
 import { useTranslate } from '@demo/use-translate';
 import { CouponInfo } from '../../coupon';
-import Toast from '../../toast';
+import { Toast } from '../../toast';
 
 const i18n = {
   'zh-CN': {

src/coupon-list/test/index.spec.ts

@@ -1,5 +1,5 @@
 import { later, mount } from '../../../test';
-import CouponList from '..';
+import { CouponList } from '..';
 
 const coupon = {
   id: 1,