feat(singer): 添加歌手评论数和收藏数功能

- 在 SingerDetail.vue 中添加评论数和收藏数的格式化计算属性
- 更新后端 SingerServiceImpl 类，添加评论数和收藏数的查询逻辑
- 在前端页面中使用格式化的评论数和收藏数

music-houduan/src/main/java/com/test/musichouduan/service/impl/SingerServiceImpl.java

@@ -12,6 +12,7 @@ import com.test.musichouduan.entity.Music;
 import com.test.musichouduan.exception.BusinessException;
 import com.test.musichouduan.repository.MusicRepository;
 import com.test.musichouduan.repository.SingerRepository;
+import com.test.musichouduan.repository.CommentRepository;
 import com.test.musichouduan.repository.SingerTypeRepository;
 import com.test.musichouduan.repository.UserRepository;
 import com.fasterxml.jackson.core.type.TypeReference;
@@ -78,6 +79,9 @@ public class SingerServiceImpl implements SingerService {
     @Autowired
     private FileService fileService;
 
+    @Autowired
+    private CommentRepository commentRepository;
+
     @Override
     public SingerDTO getSingerById(Long id) {
         Singer singer = singerRepository.findById(id)
@@ -452,12 +456,14 @@ public class SingerServiceImpl implements SingerService {
         Long musicCount = musicRepository.countBySingersContaining(singer);
         singerDTO.setMusicCount(musicCount);
 
-//        // 设置粉丝数量
-//        Long fansCount = userSingerRepository.count();
-//        singerDTO.setFansCount(fansCount);
         // 设置粉丝数量
         Long fansCount = userSingerRepository.countBySingerId(singer.getId());
         singerDTO.setFansCount(fansCount);
+        singerDTO.setCollectCount(fansCount.intValue());
+
+        // 设置评论数
+        long commentCount = commentRepository.countByTargetIdAndTargetType(singer.getId(), 3); // 3 for singer
+        singerDTO.setCommentCount((int) commentCount);
 
         // 检查当前登录用户是否已收藏该歌手
         if (StpUtil.isLogin()) {