修复底部按钮组件报错问题，修复限制折扣未导入onShow方法问题

pageRecharge/index.vue

@@ -82,6 +82,7 @@
 
 <script setup>
 import { computed, reactive, ref } from 'vue';
+import {onShow} from '@dcloudio/uni-app'
 import myTabs from '@/components/my-components/my-tabs.vue';
 import myIcons from '@/components/my-components/my-icons.vue';
 import mySwitch from '@/components/my-components/my-switch.vue';