feat(StudyDetailPage): 添加课程目录弹出层及课程切换功能

在StudyDetailPage页面中新增课程目录弹出层，支持用户查看课程目录并切换课程。点击目录项时，更新URL并重新获取课程数据，确保页面内容与所选课程一致。同时优化了课程数据的加载逻辑，提升用户体验。

@@ -156,12 +156,45 @@
                 <van-button type="primary" size="small" @click="submitComment">发送</van-button>
             </div>
         </div>
+
+        <!-- 课程目录弹出层 -->
+        <van-popup v-model:show="showCatalog" position="bottom" round closeable safe-area-inset-bottom
+            style="height: 80%">
+            <div class="flex flex-col h-full">
+                <!-- 固定头部 -->
+                <div class="flex-none px-4 py-3 border-b bg-white sticky top-0 z-10">
+                    <div class="text-lg font-medium">课程目录</div>
+                </div>
+
+                <!-- 可滚动的目录列表 -->
+                <div class="flex-1 overflow-y-auto px-4 py-2">
+                    <div v-if="course_lessons.length" class="space-y-4">
+                        <div v-for="(lesson, index) in course_lessons" :key="index"
+                            @click="handleLessonClick(lesson)"
+                            class="bg-white p-4 cursor-pointer hover:bg-gray-50 transition-colors border-b border-gray-200 relative">
+                            <div v-if="lesson.progress > 0 && lesson.progress < 100"
+                                class="absolute top-2 right-2 px-2 py-1 bg-green-100 text-green-600 text-xs rounded">
+                                上次看到</div>
+                            <div class="text-black text-base font-medium mb-2">{{ lesson.title }}</div>
+                            <div class="flex items-center text-sm text-gray-500">
+                                <span>{{ course_type_maps[lesson.course_type] }}</span>
+                                <span v-if="course_type_maps[lesson.course_type]" class="mx-2">|</span>
+                                <span>开课时间: {{ dayjs(lesson.schedule_time).format('YYYY-MM-DD') }}</span>
+                                <span class="mx-2">|</span>
+                                <span>课程时长: {{ lesson.duration }} 分钟</span>
+                            </div>
+                        </div>
+                    </div>
+                    <van-empty v-else description="暂无目录" />
+                </div>
+            </div>
+        </van-popup>
     </div>
 </template>
 
 <script setup>
 import { ref, onMounted, nextTick } from 'vue';
-import { useRoute } from 'vue-router';
+import { useRoute, useRouter } from 'vue-router';
 import { useTitle } from '@vueuse/core';
 import VideoPlayer from '@/components/ui/VideoPlayer.vue';
 import AudioPlayer from '@/components/ui/AudioPlayer.vue';
@@ -169,10 +202,12 @@ import dayjs from 'dayjs';
 import { formatDate } from '@/utils/tools'
 
 // 导入接口
-import { getScheduleCourseAPI, getGroupCommentListAPI, addGroupCommentAPI, addGroupCommentLikeAPI, delGroupCommentLikeAPI } from '@/api/course';
+import { getScheduleCourseAPI, getGroupCommentListAPI, addGroupCommentAPI, addGroupCommentLikeAPI, delGroupCommentLikeAPI, getCourseDetailAPI } from '@/api/course';
 
 const route = useRoute();
+const router = useRouter();
 const course = ref(null);
+
 const activeTab = ref('intro');
 const newComment = ref('');
 const showCatalog = ref(false);
@@ -181,6 +216,15 @@ const videoPlayerRef = ref(null);
 const showCommentPopup = ref(false);
 const popupComment = ref('');
 
+// 课程目录相关
+const course_lessons = ref([]);
+const course_type_maps = ref({
+    video: '视频',
+    audio: '音频',
+    image: '图片',
+    file: '文件',
+});
+
 // 开始播放视频
 const startPlay = async () => {
     isPlaying.value = true;
@@ -299,6 +343,34 @@ const commentCount = ref(0);
 const commentList = ref([]);
 const courseFile = ref({});
 
+// 处理课程切换
+const handleLessonClick = async (lesson) => {
+    showCatalog.value = false; // 关闭目录弹窗
+    isPlaying.value = false; // 重置播放状态
+
+    // 更新URL地址，不触发页面重新加载
+    router.replace({ params: { id: lesson.id } });
+
+    // 重新获取课程数据
+    const { code, data } = await getScheduleCourseAPI({ i: lesson.id });
+    if (code) {
+        course.value = data;
+        courseFile.value = data.file;
+
+        // 音频列表处理
+        if (data.course_type === 'audio') {
+            audioList.value = [data.file];
+        }
+
+        // 获取评论列表
+        const comment = await getGroupCommentListAPI({ group_id: data.group_id, schedule_id: data.id });
+        if (comment.code) {
+            commentList.value = comment.data.comment_list;
+            commentCount.value = comment.data.comment_count;
+        }
+    }
+};
+
 onMounted(async () => {
     // 延迟设置topWrapper和bottomWrapper的高度
     setTimeout(() => {
@@ -334,7 +406,14 @@ onMounted(async () => {
                 commentList.value = comment.data.comment_list;
                 commentCount.value = comment.data.comment_count;
             }
+
+            // 获取课程目录
+            const detail = await getCourseDetailAPI({ i: course.value.group_id });
+            if (detail.code) {
+                course_lessons.value = detail.data.schedule || [];
+            }
         }
+
     }
 })