feat(ui): add compact mode to TrackRow for Continue Listening

- Add compact prop to TrackRow: smaller height (44px), artist as column
- Apply compact mode to Continue Listening section in Home
- Reduces vertical space and improves scannability

src/lib/components/views/HomeView.svelte

@@ -593,6 +593,7 @@
                 duration={track.duration}
                 quality={getTrackQuality(track)}
                 hideDownload={true}
+                compact={true}
                 onPlay={() => onTrackPlay?.(track)}
                 menuActions={{
                   onPlayNow: () => onTrackPlay?.(track)