feat(playlist): 增加歌单收藏状态检查功能

- 新增 isPlaylistCollected 接口和相关实现
- 修改 toggleCollectPlaylist 函数，增加当前收藏状态参数
- 在前端 PlaylistDetail 组件中添加收藏状态检查逻辑
- 后端增加对应的控制层、服务层和实现类方法

music-qianduan/src/views/SingerDetail.vue

@@ -4,7 +4,7 @@ import { useRoute, useRouter } from 'vue-router'
 import { usePlayerStore } from '../stores/player'
 import { useUserStore } from '../stores/user'
 import { ElMessage, ElMessageBox } from 'element-plus'
-import { getSingerById, toggleCollectSinger } from '../api/singer'
+import { getSingerById, isSingerCollected, collectSinger, uncollectSinger } from '../api/singer'
 import { getCommentList, addComment, deleteComment as apiDeleteComment } from '../api/comment'
 import { processImageUrl } from '../utils/imageUtils'
 import { processMusicUrl, getMusicBySinger, getMusicStatus } from '../api/music'
@@ -67,8 +67,10 @@ const fetchSingerDetail = async () => {
       // 获取歌手的音乐列表
       await fetchSingerMusic()
 
-      // 获取收藏状态
-      isCollected.value = singer.value.collected === true
+      // 如果用户已登录，则检查是否收藏
+      if (userStore.isLoggedIn) {
+        checkIfCollected()
+      }
     } else {
       ElMessage.error(res.message || '获取歌手详情失败')
     }
@@ -80,6 +82,18 @@ const fetchSingerDetail = async () => {
   }
 }
 
+// 检查是否收藏
+const checkIfCollected = async () => {
+  try {
+    const res = await isSingerCollected(singerId.value)
+    if (res.code === 200) {
+      isCollected.value = res.data
+    }
+  } catch (error) {
+    console.error('检查收藏状态失败:', error)
+  }
+}
+
 // 获取歌手的音乐列表
 const fetchSingerMusic = async () => {
   try {
@@ -181,7 +195,7 @@ const toggleCollect = async () => {
   }
 
   try {
-    const res = await toggleCollectSinger(singerId.value)
+    const res = await toggleCollectSinger(singerId.value, isCollected.value)
     if (res.code === 200) {
       isCollected.value = !isCollected.value
       // 更新收藏数