Fix getCoverArt to properly lookup artwork by album ID

src/routes/subsonic.js

@@ -554,8 +554,26 @@ router.get('/getCoverArt.view', authenticateSubsonic, async (req, res) => {
   try {
     const { id } = req.query;
     
-    // Try to find artwork by album ID or track ID
+    // First try to find by track ID
-    const track = await get('SELECT artwork_path FROM tracks WHERE id = ? OR id IN (SELECT id FROM tracks LIMIT 1)', [id]);
+    let track = await get('SELECT artwork_path FROM tracks WHERE id = ?', [id]);
+    
+    // If not found, the ID might be an album ID - decode it and find a track from that album
+    if (!track) {
+      // Try to find which album this ID represents
+      const allAlbums = await all(`SELECT DISTINCT album, album_artist FROM tracks`);
+      
+      for (const album of allAlbums) {
+        const albumId = crypto.createHash('md5').update(`album-${album.album}-${album.album_artist}`).digest('hex');
+        if (albumId === id) {
+          // Found the album, get artwork from any track in this album
+          track = await get(
+            'SELECT artwork_path FROM tracks WHERE album = ? AND album_artist = ? AND artwork_path IS NOT NULL LIMIT 1',
+            [album.album, album.album_artist]
+          );
+          break;
+        }
+      }
+    }
     
     if (!track || !track.artwork_path) {
       return res.status(404).send('Cover art not found');
@@ -564,6 +582,7 @@ router.get('/getCoverArt.view', authenticateSubsonic, async (req, res) => {
     const artworkPath = `${process.cwd()}/artwork/${track.artwork_path}`;
     res.sendFile(artworkPath);
   } catch (error) {
+    console.error('Error in getCoverArt:', error);
     res.status(404).send('Cover art not found');
   }
 });