修正多处问题，添加骨架屏

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

@@ -27,6 +27,9 @@
             </view>
 
             <view class="booking-page__body">
+                <!-- 骨架屏 -->
+                <ListSkeleton v-if="loading" :count="4" layout="card" />
+
                 <!-- 无数据 -->
                 <view v-if="!displayedBookings.length && !loading" class="booking-page__empty">
                     <text class="booking-page__empty-text">
@@ -43,7 +46,7 @@
                 >
                     <image
                         class="bk-card__banner"
-                        :src="item.coverImage || item.banner || 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/images/default-course.png'"
+                        :src="item.banner"
                         mode="aspectFill"
                     />
                     <view class="bk-card__content">
@@ -114,7 +117,9 @@
 <script setup>
 import { ref, computed, onMounted } from 'vue'
 import PageHeader from '@/components/index/PageHeader.vue'
+import ListSkeleton from '@/components/Skeleton/ListSkeleton.vue'
 import { getMemberId } from '@/utils/request.js'
+import { getCourseCoverUrl } from '@/utils/request.js'
 import { getMemberBookings, signinGroupCourse, cancelBooking as cancelBookingApi } from '@/api/main.js'
 
 const tabs = ref([
@@ -175,7 +180,7 @@ function mapBooking(b) {
         status: status,
         statusLabel: getBookingStatusLabel(b),
         schedule: formatBookingTime(b.courseStartTime || b.startTime || b.bookingTime),
-        banner: b.coverImage || '',
+        banner: getCourseCoverUrl(b.coverImage) || 'https://gymfuture.oss-cn-chengdu.aliyuncs.com/static/images/default-course.png',
         coach: b.coachName || b.coach || '教练',
         footerText: status === 'ongoing' ? '请准时参加课程' : '',
         canSignin: status === 'ongoing',