fix: update playlist and local track play to use playerStore

handlePlaylistTrackPlay and handleLocalTrackPlay were still using
local state variables directly instead of playerStore functions,
causing the UI to not react to playback state changes.

src/routes/+page.svelte

@@ -1075,7 +1075,7 @@
       ? `${track.bitDepth}bit/${track.samplingRate}kHz`
       : 'CD Quality';
 
-    currentTrack = {
+    const newTrack: PlayingTrack = {
       id: track.id,
       title: track.title,
       artist: track.artist || 'Unknown Artist',
@@ -1084,13 +1084,11 @@
       duration: track.durationSeconds,
       quality
     };
-
-    duration = track.durationSeconds;
-    currentTime = 0;
+    setCurrentTrack(newTrack);
 
     try {
       await invoke('play_track', { trackId: track.id });
-      isPlaying = true;
+      setIsPlaying(true);
 
       await invoke('set_media_metadata', {
         title: track.title,
@@ -1117,11 +1115,14 @@
         track.id
       );
 
+      // Check if track is favorite
+      setIsFavorite(await checkTrackFavorite(track.id));
+
       await syncQueueState();
     } catch (err) {
       console.error('Failed to play track:', err);
       showToast(`Playback error: ${err}`, 'error');
-      isPlaying = false;
+      setIsPlaying(false);
     }
   }
 
@@ -1149,41 +1150,51 @@
         : track.format)
       : track.format;
 
-    currentTrack = {
+    const newTrack: PlayingTrack = {
       id: track.id,
       title: track.title,
       artist: track.artist,
       album: track.album,
       artwork,
       duration: track.duration_secs,
-      quality
+      quality,
+      isLocal: true
     };
+    setCurrentTrack(newTrack);
 
-    duration = track.duration_secs;
-    currentTime = 0;
-    isPlaying = true;
-    showToast(`Playing: ${track.title}`, 'success');
+    try {
+      await invoke('library_play_track', { trackId: track.id });
+      setIsPlaying(true);
+      showToast(`Playing: ${track.title}`, 'success');
 
-    // Update MPRIS metadata
-    await invoke('set_media_metadata', {
-      title: track.title,
-      artist: track.artist,
-      album: track.album,
-      durationSecs: track.duration_secs,
-      coverUrl: artwork || null
-    });
+      // Update MPRIS metadata
+      await invoke('set_media_metadata', {
+        title: track.title,
+        artist: track.artist,
+        album: track.album,
+        durationSecs: track.duration_secs,
+        coverUrl: artwork || null
+      });
 
-    // Show system notification
-    showTrackNotification(track.title, track.artist, track.album, artwork || undefined);
+      // Show system notification
+      showTrackNotification(track.title, track.artist, track.album, artwork || undefined);
 
-    // Update Last.fm
-    updateLastfmNowPlaying(
-      track.title,
-      track.artist,
-      track.album,
-      track.duration_secs,
-      track.id
-    );
+      // Update Last.fm
+      updateLastfmNowPlaying(
+        track.title,
+        track.artist,
+        track.album,
+        track.duration_secs,
+        track.id
+      );
+
+      // Local tracks don't have Qobuz favorites
+      setIsFavorite(false);
+    } catch (err) {
+      console.error('Failed to play local track:', err);
+      showToast(`Playback error: ${err}`, 'error');
+      setIsPlaying(false);
+    }
   }
 
   // Handle setting queue from local library (tracks need different playback command)