fix(ui): make every track, album and artist name navigate somewhere

A name linked only when the entity carried an MBID — and for tracks,
only when it carried two. That rule is invisible, so a track list read
as randomly broken: some titles were clickable, most were not, and
nothing on screen said why.

A name now always goes somewhere. Tagged entities open their
MusicBrainz page as before; untagged ones open the *library* page for
the same album or artist, which both detail views already support via
a local id — they just had no caller passing one. An untagged track
highlights by title, since a recording MBID is exactly what it lacks.

Links now fire on a genuine single click only. Every list these appear
in also plays a row on double-click, and the title is the widest thing
in the row, so the first click of that gesture lands on the link:
navigating immediately meant double-clicking a track title opened a
page instead of playing it, which the e2e playback suite caught. The
navigation is held for one double-click interval and dropped if the
second click arrives, while the dblclick itself is left to bubble to
the row — so rows do not need to know links exist.

frontend/index.ts

@@ -209,7 +209,14 @@ document.addEventListener('navigate', (e: Event) => {
             break;
         }
         case 'explore-album-details': {
-            const { releaseGroupMBID, albumName, artistName, highlightTrackMBID, localAlbumId } = detail;
+            const {
+                releaseGroupMBID,
+                albumName,
+                artistName,
+                highlightTrackMBID,
+                highlightTrackTitle,
+                localAlbumId,
+            } = detail;
             const el = document.createElement('explore-album-details');
 
             if (releaseGroupMBID) el.setAttribute('release-group-mbid', releaseGroupMBID);
@@ -218,6 +225,9 @@ document.addEventListener('navigate', (e: Event) => {
             if (highlightTrackMBID) {
                 el.setAttribute('highlight-track-mbid', highlightTrackMBID);
             }
+            if (highlightTrackTitle) {
+                el.setAttribute('highlight-track-title', highlightTrackTitle);
+            }
             if (localAlbumId) el.setAttribute('local-album-id', String(localAlbumId));
             mainContent.appendChild(el);
             currentDetailEl = el;