修正多处问题，添加骨架屏

gym-manage-uniapp/components/groupCourse/CourseCard.vue

@@ -1,4 +1,4 @@
-<template>
+<template>
   <!-- 团课卡片容器 -->
   <view class="course-card" @click="goDetail">
     <!-- 卡片顶部图片区域 -->
@@ -7,7 +7,7 @@
       <view v-if="!imageLoaded" class="skeleton skeleton-image"></view>
       <!-- 课程封面图片 -->
       <image 
-        :src="course.coverImage" 
+        :src="getCourseCoverUrl(course.coverImage)" 
         mode="aspectFill" 
         class="cover-image" 
         :class="{ hidden: !imageLoaded }"
@@ -111,6 +111,7 @@
 
 <script setup>
 import { ref, computed } from 'vue'
+import { getCourseCoverUrl } from '@/utils/request.js'
 
 // 图片加载状态
 const imageLoaded = ref(false)

gym-manage-uniapp/components/groupCourse/FilterSection.vue

@@ -1,4 +1,4 @@
-<template>
+<template>
 	<view class="filter-section">
 		<!-- 课程类型筛选 -->
 		<picker 

gym-manage-uniapp/components/groupCourse/SearchBar.vue

@@ -1,4 +1,4 @@
-<template>
+<template>
 	<view class="search-bar-wrapper">
 		<!-- 搜索框 -->
 		<view class="search-bar">

gym-manage-uniapp/components/groupCourse/TimePeriodSelector.vue

@@ -1,4 +1,4 @@
-<template>
+<template>
 	<view class="time-period-selector">
 		<view class="sort-header">
 			<uni-icons type="calendar" size="16" color="#FF6B35" class="sort-icon" />

gym-manage-uniapp/components/groupCourse/TimeRangePicker.vue

@@ -1,4 +1,4 @@
-<template>
+<template>
 	<view>
 		<!-- 时间范围选择弹窗 -->
 		<Transition name="modal">