feat: remove Künstler sort pill from albums tab

Artists have their own dedicated tab so sorting albums by artist is redundant.

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

index.html

@@ -193,7 +193,6 @@
         <div class="page-header"><div class="page-title">Alben</div></div>
         <div id="albums-sort-chips" class="sort-chips">
           <button class="sort-chip active" data-sort="alphabeticalByName" onclick="loadAlbums('alphabeticalByName')">A–Z</button>
-          <button class="sort-chip" data-sort="alphabeticalByArtist" onclick="loadAlbums('alphabeticalByArtist')">Künstler</button>
           <button class="sort-chip" data-sort="newest" onclick="loadAlbums('newest')">Neueste</button>
           <button class="sort-chip" data-sort="recent" onclick="loadAlbums('recent')">Zuletzt gespielt</button>
           <button class="sort-chip" data-sort="frequent" onclick="loadAlbums('frequent')">Meistgespielt</button>