fix: per-span hover highlight, use • as artist separator everywhere

- CSS: target #player-artist-name span:hover and #np-artist-name span:hover so only the hovered artist name highlights, not all at once
- change artist separator from / to • in song items, player bar, now playing overlay, album header

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components.js

@@ -39,7 +39,7 @@ export function makeSongItem(s, idx, list, { noArtistLink = false, noAlbumLink =
         return noArtistLink
           ? `<span style="color:var(--text2)">${esc(name)}</span>`
           : `<span class="song-link" onclick="event.stopPropagation();s_goArtist(event,'${esc(name)}','${aid}')">${esc(name)}</span>`;
-      }).join('<span style="color:var(--text3)"> / </span>')
+      }).join('<span style="color:var(--text3)"> • </span>')
     : '';
   const albumHtml = !noAlbumLink && (s.albumId||s.album)
     ? `<span style="color:var(--text3)"> · </span><span class="song-link" onclick="event.stopPropagation();s_goAlbum(event,'${s.albumId||''}','${esc(s.album||'')}','${esc(s.artist||'')}','${s.artistId||''}')">${esc(s.album||'')}</span>`