Return all downloads per album grouped by quality, filter out failed/cancelled from listings

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/claude-agent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/database/download_repository.go

@@ -173,27 +173,28 @@ func (r *DownloadRepository) GetByID(ctx context.Context, id string) (*Download,
 	return d, nil
 }
 
-func (r *DownloadRepository) GetLatestByAlbumIDs(ctx context.Context, albumIDs []string) (map[string]*Download, error) {
+func (r *DownloadRepository) GetByAlbumIDs(ctx context.Context, albumIDs []string) (map[string][]*Download, error) {
 	if len(albumIDs) == 0 {
 		return nil, nil
 	}
 
 	rows, err := r.pool.Query(ctx,
-		`SELECT DISTINCT ON (album_id) id, torrent_id, album_id, format, quality, state, qbit_hash, save_path, error_message, queued_at, started_at, completed_at, created_at, updated_at
-		 FROM downloads WHERE album_id = ANY($1) ORDER BY album_id, created_at DESC`, albumIDs,
+		`SELECT id, torrent_id, album_id, format, quality, state, qbit_hash, save_path, error_message, queued_at, started_at, completed_at, created_at, updated_at
+		 FROM downloads WHERE album_id = ANY($1) AND state NOT IN ('failed', 'cancelled')
+		 ORDER BY album_id, created_at DESC`, albumIDs,
 	)
 	if err != nil {
 		return nil, fmt.Errorf("batch listing downloads: %w", err)
 	}
 	defer rows.Close()
 
-	result := make(map[string]*Download, len(albumIDs))
+	result := make(map[string][]*Download, len(albumIDs))
 	for rows.Next() {
 		d := &Download{}
 		if err := rows.Scan(&d.ID, &d.TorrentID, &d.AlbumID, &d.Format, &d.Quality, &d.State, &d.QbitHash, &d.SavePath, &d.ErrorMessage, &d.QueuedAt, &d.StartedAt, &d.CompletedAt, &d.CreatedAt, &d.UpdatedAt); err != nil {
 			return nil, fmt.Errorf("scanning download: %w", err)
 		}
-		result[d.AlbumID] = d
+		result[d.AlbumID] = append(result[d.AlbumID], d)
 	}
 	return result, nil
 }