feat(歌曲元数据): 添加对Tunehub和音乐平台URL的解析支持

新增parseTunehubParams和parsePageUrlParams函数用于解析不同音乐平台的URL参数，并添加buildSongMetaFromTunehub函数构建歌曲元数据。当URL匹配时优先从Tunehub获取歌曲信息，否则回退到原有逻辑。

backend/src/handler/song_meta.js

@@ -1,6 +1,62 @@
 const logger = require('consola');
 const { getMetaWithUrl } = require('../service/media_fetcher');
 const { matchUrlFromStr } = require('../utils/regex');
+const { getSongInfo, buildSongUrl } = require('../service/music_platform/tunehub');
+
+function parseTunehubParams(url) {
+    try {
+        const parsed = new URL(url);
+        if (!parsed.hostname.includes('music-dl.sayqz.com')) {
+            return null;
+        }
+        const source = parsed.searchParams.get('source');
+        const id = parsed.searchParams.get('id');
+        if (!source || !id) {
+            return null;
+        }
+        return { source, id };
+    } catch (err) {
+        return null;
+    }
+}
+
+function parsePageUrlParams(url) {
+    if (!url) {
+        return null;
+    }
+    if (url.indexOf('music.163.com') >= 0 || url.indexOf('m.music.163.com') >= 0) {
+        const match = url.match(/id=(\d+)/);
+        if (match && match[1]) {
+            return { source: 'netease', id: match[1] };
+        }
+    }
+    if (url.indexOf('y.qq.com') >= 0) {
+        const match = url.match(/songDetail\/([A-Za-z0-9]+)/);
+        if (match && match[1]) {
+            return { source: 'qq', id: match[1] };
+        }
+    }
+    return null;
+}
+
+function buildSongMetaFromTunehub(source, info, pageUrl, songId) {
+    return {
+        songName: info.name || '',
+        artist: info.artist || '',
+        album: info.album || '',
+        duration: 0,
+        coverUrl: info.pic || '',
+        pageUrl,
+        audios: [
+            {
+                url: info.url || buildSongUrl(source, songId),
+            }
+        ],
+        fromMusicPlatform: true,
+        resourceForbidden: false,
+        source,
+    };
+}
 
 async function getMeta(req, res) {
     const query = req.query;
@@ -15,8 +71,18 @@ async function getMeta(req, res) {
         return;
     }
 
-    const songMeta = await getMetaWithUrl(url);
-    songMeta && (songMeta.pageUrl = url);
+    let songMeta = null;
+    const params = parseTunehubParams(url) || parsePageUrlParams(url);
+    if (params) {
+        const tunehubInfo = await getSongInfo(params.source, params.id);
+        if (tunehubInfo) {
+            songMeta = buildSongMetaFromTunehub(params.source, tunehubInfo, url, params.id);
+        }
+    }
+    if (!songMeta) {
+        songMeta = await getMetaWithUrl(url);
+        songMeta && (songMeta.pageUrl = url);
+    }
 
     res.send({
         status: songMeta ? 0 : 1,