修正多处问题，添加骨架屏

gym-manage-uniapp/pages/memberInfo/purchaseCard.vue

@@ -11,8 +11,11 @@
                     <text class="pc-intro__desc">购买后立即生效，享受专属会员权益</text>
                 </view>
 
+                <!-- 骨架屏 -->
+                <ListSkeleton v-if="loadingCards" :count="3" layout="simple" />
+
                 <!-- 卡列表 -->
-                <view class="pc-list">
+                <view v-else-if="cardTypes.length" class="pc-list">
                     <view
                         v-for="card in cardTypes"
                         :key="card.id"
@@ -268,6 +271,7 @@
 <script setup>
 import { ref, computed, onMounted, onUnmounted } from 'vue'
 import { onShow } from '@dcloudio/uni-app'
+import ListSkeleton from '@/components/Skeleton/ListSkeleton.vue'
 import { purchaseMemberCard, createPayment, createQrCodePayment, getPaymentStatus, queryHuifuTradeByOrderId, getActiveMemberCards } from '@/api/main.js'
 import { getMemberId } from '@/utils/request.js'