完成作业

src/main/java/com/vibevault/service/PlaylistService.java

@@ -59,11 +59,6 @@ public interface PlaylistService {
      */
     List<PlaylistDTO> searchPlaylists(String keyword);
 
-    /**
-     * [Advanced] 按所有者查询歌单
-     */
-    List<PlaylistDTO> getPlaylistsByOwner(String username);
-
     /**
      * [Advanced] 复制歌单
      */

src/main/java/com/vibevault/service/PlaylistServiceImpl.java

@@ -110,17 +110,7 @@ public class PlaylistServiceImpl implements PlaylistService {
 
     // ========== Advanced 方法 ==========
 
-    @Override
+
-    @Transactional(readOnly = true)
-    public List<PlaylistDTO> getPlaylistsByOwner(String username) {
-        User owner = userRepository.findByUsername(username)
-                .orElseThrow(() -> new ResourceNotFoundException("User not found: " + username));
-        
-        return playlistRepository.findByOwner(owner)
-                .stream()
-                .map(this::toDTO)
-                .toList();
-    }
 
     @Override
     @Transactional(readOnly = true)