fix(music-detail): show global like/collect counts on music detail page

music-houduan/src/main/java/com/test/musichouduan/dto/MusicDTO.java

@@ -54,6 +54,16 @@ public class MusicDTO {
      */
     private Long playCount;
 
+    /**
+     * 点赞数
+     */
+    private Integer likeCount;
+
+    /**
+     * 收藏数
+     */
+    private Integer collectCount;
+
     /**
      * 歌手列表
      */

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

@@ -650,6 +650,10 @@ public class MusicServiceImpl implements MusicService {
         MusicDTO musicDTO = new MusicDTO();
         BeanUtils.copyProperties(music, musicDTO);
 
+        // 兜底互动计数，避免前端出现 null
+        musicDTO.setLikeCount(music.getLikeCount() != null ? music.getLikeCount() : 0);
+        musicDTO.setCollectCount(music.getCollectCount() != null ? music.getCollectCount() : 0);
+
         // 确保专辑字段正确复制
         musicDTO.setAlbum(music.getAlbum());