Make the now-playing bar's title/artist clickable and add a cover art lightbox

The song title links to its album, the artist name links to the artist
page, and clicking the cover art opens a larger version in a modal.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014r98AtcBbevpscWLsfwVvv

web/templates/partials/cards.html

@@ -22,7 +22,9 @@
           data-song-id="{{$s.ID}}"
           data-title="{{$s.Title}}"
           data-artist="{{$s.ArtistName}}"
+          data-artist-id="{{$s.ArtistID}}"
           data-album="{{$s.AlbumTitle}}"
+          data-album-id="{{$s.AlbumID}}"
           data-cover="{{$s.CoverArtID}}"
           data-starred="{{if $s.Starred}}1{{else}}0{{end}}">
         <td class="vs-track-num">{{if $s.TrackNumber}}{{$s.TrackNumber}}{{else}}{{add $i 1}}{{end}}</td>