修正多处问题，添加骨架屏

gym-manage-uniapp/pages/groupCourse/detail.vue

@@ -1,4 +1,4 @@
-<template>
+<template>
 	<view class="course-detail-page">
 		<!-- 页面头部 -->
 		<PageHeader title="课程详情" subtitle="团课预约" :show-back="true" />
@@ -64,7 +64,7 @@
 				<view class="cover-image-wrapper">
 					<image 
 						v-if="course.coverImage"
-						:src="course.coverImage" 
+						:src="getCourseCoverUrl(course.coverImage)" 
 						mode="aspectFill" 
 						class="cover-image"
 					/>
@@ -245,6 +245,7 @@
 import { ref, computed } from 'vue'
 import { onLoad } from '@dcloudio/uni-app'
 import { getGroupCourseDetail, bookGroupCourse } from '@/api/groupCourse.js'
+import { getCourseCoverUrl } from '@/utils/request.js'
 import { getPrimaryMemberCard } from '@/api/main.js'
 import { getMemberId } from '@/utils/request.js'
 import PageHeader from '@/components/index/PageHeader.vue'