fix(music): 修复音乐和封面上传路径问题

- 将音乐和封面的物理路径转换为相对于项目目录的路径
- 使用 '/' 替换系统文件分隔符，确保路径格式一致

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

@@ -368,7 +368,8 @@ public class MusicServiceImpl implements MusicService {
             }
 
             // 上传新文件
-            String musicUrl = fileService.uploadMusic(file);
+            String musicPhysicalPath = fileService.uploadMusic(file);
+            String musicUrl = musicPhysicalPath.replace(System.getProperty("user.dir") + File.separator + "music-houduan", "").replace(File.separator, "/");
             music.setUrl(musicUrl);
         }
 
@@ -380,7 +381,8 @@ public class MusicServiceImpl implements MusicService {
             }
 
             // 上传新封面
-            String coverUrl = fileService.uploadImage(cover);
+            String coverPhysicalPath = fileService.uploadImage(cover);
+            String coverUrl = coverPhysicalPath.replace(System.getProperty("user.dir") + File.separator + "music-houduan", "").replace(File.separator, "/");
             music.setCover(coverUrl);
         }