refactor(ui): remove in-library status from spotify collection view

src/lib/components/SpotifyCollectionView.svelte

@@ -9,7 +9,6 @@
     metadata?: string;
     coverImageUrl?: string;
     tracks: Track[];
-    trackExistsMap?: Map<string, boolean>;
     selectedTrackIndex?: number | null;
     onTrackClick?: (index: number) => void;
     onDownloadTrack?: (index: number) => void;
@@ -23,7 +22,6 @@
     metadata,
     coverImageUrl,
     tracks,
-    trackExistsMap = new Map(),
     selectedTrackIndex = null,
     onTrackClick,
     onDownloadTrack,
@@ -47,19 +45,8 @@
     }
   }
 
-  // Get Spotify track ID for existence checking
-  function getSpotifyTrackId(track: Track): string | undefined {
-    return (track as any).spotifyId?.toString();
-  }
-
-  function isTrackInLibrary(track: Track): boolean {
-    const trackId = getSpotifyTrackId(track);
-    if (!trackId) return false;
-    return trackExistsMap.get(trackId) ?? false;
-  }
-
   function isTrackDownloading(track: Track): boolean {
-    const trackId = getSpotifyTrackId(track);
+    const trackId = (track as any).spotifyId?.toString();
     if (!trackId) return false;
     return downloadingTrackIds.has(trackId);
   }
@@ -119,7 +106,6 @@
                 <th>Album</th>
                 <th>Duration</th>
                 {#if $deezerAuth.loggedIn}
-                  <th style="width: 80px;">In Library</th>
                   <th style="width: 100px;">Actions</th>
                 {/if}
               </tr>
@@ -144,9 +130,6 @@
                     {/if}
                   </td>
                   {#if $deezerAuth.loggedIn}
-                    <td class="in-library">
-                      {isTrackInLibrary(track) ? '✓' : '✗'}
-                    </td>
                     <td class="actions">
                       <button
                         onclick={(e) => handleDownloadClick(i, e)}
@@ -329,12 +312,6 @@
     color: #c00;
   }
 
-  .in-library {
-    text-align: center;
-    font-weight: bold;
-    font-size: 1.2em;
-  }
-
   .actions {
     text-align: center;
   }