update: autosearch for musics

src/routes/musicSearch.js

@@ -0,0 +1,33 @@
+const express = require('express');
+const musicSearch = require('../lib/musicSearch');
+const asyncHandler = require('../lib/asyncHandler');
+
+const router = express.Router();
+
+router.get(
+  '/',
+  asyncHandler(async (req, res) => {
+    const q = (req.query.q || '').trim();
+    if (q.length < 2) return res.json([]);
+    try {
+      const candidates = await musicSearch.searchCandidates(q);
+      res.json(candidates);
+    } catch (err) {
+      console.warn('[musicSearch] candidate search failed:', err.message);
+      res.json([]);
+    }
+  })
+);
+
+router.get(
+  '/links',
+  asyncHandler(async (req, res) => {
+    const title = (req.query.title || '').trim();
+    const artist = (req.query.artist || '').trim();
+    if (!title || !artist) return res.status(400).json({ error: 'title_and_artist_required' });
+    const links = await musicSearch.findLinks(title, artist);
+    res.json(links);
+  })
+);
+
+module.exports = router;