fix: lyrics race condition, PC scroll, artwork matching, accidental artist/album taps

- nowplaying: add cancellation token to _loadNpLyrics to prevent stale async
  calls overwriting newer results (synced→plain race condition)
- nowplaying: replace scrollIntoView with explicit container.scrollTo to prevent
  page-level scroll on desktop (topbar shifting / gap at edge)
- backend: remove results[0] fallback in lookupItunesTrackMeta — only use
  exact title+artist match to avoid embedding wrong artwork
- components/views: makeSongItem accepts noArtistLink/noAlbumLink opts;
  album-detail disables both, playlist-detail disables artist link

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

src/views.js

@@ -440,7 +440,7 @@ export async function loadAlbumDetail(album) {
       toast(`⬇ ${songs.length} Titel Download gestartet`);
     };
     sl.innerHTML = '';
-    songs.forEach((s,i) => sl.appendChild(makeSongItem(s, i, songs)));
+    songs.forEach((s,i) => sl.appendChild(makeSongItem(s, i, songs, { noArtistLink: true, noAlbumLink: true })));
   } catch(e) { sl.innerHTML = `<p style="color:var(--danger)">${e.message}</p>`; }
 }
 
@@ -492,7 +492,7 @@ export async function loadPlaylistDetail(pl) {
       playQueue(shuffled, 0);
     };
     sl.innerHTML = '';
-    songs.forEach((s,i) => sl.appendChild(makeSongItem(s, i, songs)));
+    songs.forEach((s,i) => sl.appendChild(makeSongItem(s, i, songs, { noArtistLink: true })));
   } catch(e) { sl.innerHTML = `<p style="color:var(--danger)">${e.message}</p>`; }
 }