feat: 为歌曲同步功能添加元数据记录和日志

在前后端添加日志记录和元数据传递，包括歌曲名称、艺术家和专辑信息

backend/src/handler/songs.js

@@ -114,6 +114,7 @@ async function search(req, res) {
         .map(mapTunehubResult)
         .filter(song => song.songName.length > 0);
 
+    logger.info(`[search] Final songs array = ${JSON.stringify(songs, null, 2)}`);
     res.send({
         status: 0,
         data: {

backend/src/handler/sync_jobs.js

@@ -52,7 +52,9 @@ async function createJob(req, res) {
         jobId = await unblockMusicWithSongId(uid, source, songId)
     } else if (jobType === JobType.SyncSongFromUrl || jobType === JobType.DownloadSongFromUrl) {
         const request = req.body;
+        logger.info(`[createJob] Received jobType=${jobType}, request.body.urlJob=${JSON.stringify(request.urlJob, null, 2)}`);
         const url = request.urlJob && matchUrlFromStr(request.urlJob.url);
+        logger.info(`[createJob] Extracted url=${url} from request.urlJob.url=${request.urlJob.url}`);
 
         if (!url) {
             res.status(412).send({
@@ -64,6 +66,7 @@ async function createJob(req, res) {
 
         let meta = {};
         const songId = request.urlJob && request.urlJob.meta.songId ? request.urlJob.meta.songId : "";
+        logger.info(`[createJob] songId=${songId}`);
 
         // 先从 TuneHub 获取歌曲信息，避免显示原始 URL
         if (request.urlJob.meta && (request.urlJob.meta.songName !== "" && request.urlJob.meta.artist !== "")) {