fix: use album artist for folder organization in Album download mode

octo-fiesta/Services/Common/BaseDownloadService.cs

@@ -183,7 +183,35 @@ public abstract class BaseDownloadService : IDownloadService
         try
         {
             // Get metadata
-            var song = await MetadataService.GetSongAsync(externalProvider, externalId);
+            // In Album mode, fetch the full album first to ensure AlbumArtist is correctly set
+            Song? song = null;
+            
+            if (SubsonicSettings.DownloadMode == DownloadMode.Album)
+            {
+                // First try to get the song to extract album ID
+                var tempSong = await MetadataService.GetSongAsync(externalProvider, externalId);
+                if (tempSong != null && !string.IsNullOrEmpty(tempSong.AlbumId))
+                {
+                    var albumExternalId = ExtractExternalIdFromAlbumId(tempSong.AlbumId);
+                    if (!string.IsNullOrEmpty(albumExternalId))
+                    {
+                        // Get full album with correct AlbumArtist
+                        var album = await MetadataService.GetAlbumAsync(externalProvider, albumExternalId);
+                        if (album != null)
+                        {
+                            // Find the track in the album
+                            song = album.Songs.FirstOrDefault(s => s.ExternalId == externalId);
+                        }
+                    }
+                }
+            }
+            
+            // Fallback to individual song fetch if not in Album mode or album fetch failed
+            if (song == null)
+            {
+                song = await MetadataService.GetSongAsync(externalProvider, externalId);
+            }
+            
             if (song == null)
             {
                 throw new Exception("Song not found");

octo-fiesta/Services/Deezer/DeezerMetadataService.cs

@@ -229,8 +229,8 @@ public class DeezerMetadataService : IMusicMetadataService
             int trackIndex = 1;
             foreach (var track in tracksData.EnumerateArray())
             {
-                // Pass the index as fallback for track_position (Deezer doesn't include it in album tracks)
+                // Pass the album artist to ensure proper folder organization
-                var song = ParseDeezerTrack(track, trackIndex);
+                var song = ParseDeezerTrack(track, trackIndex, album.Artist);
                 if (ShouldIncludeSong(song))
                 {
                     album.Songs.Add(song);
@@ -283,7 +283,7 @@ public class DeezerMetadataService : IMusicMetadataService
         return albums;
     }
 
-    private Song ParseDeezerTrack(JsonElement track, int? fallbackTrackNumber = null)
+    private Song ParseDeezerTrack(JsonElement track, int? fallbackTrackNumber = null, string? albumArtist = null)
     {
         var externalId = track.GetProperty("id").GetInt64().ToString();
         
@@ -321,6 +321,7 @@ public class DeezerMetadataService : IMusicMetadataService
                           albumForCover.TryGetProperty("cover_medium", out var cover)
                 ? cover.GetString()
                 : null,
+            AlbumArtist = albumArtist,
             IsLocal = false,
             ExternalProvider = "deezer",
             ExternalId = externalId,