feat: capture and display original upload filename for tracks

DeepDrftContent/TrackContentService.cs

@@ -29,6 +29,7 @@ public class TrackContentService
     /// <param name="album">Optional album name</param>
     /// <param name="genre">Optional genre</param>
     /// <param name="releaseDate">Optional release date</param>
+    /// <param name="originalFileName">Optional original browser filename captured at upload time</param>
     /// <returns>The track entity with generated ID and media path</returns>
     public async Task<TrackEntity?> AddTrackFromWavAsync(
         string wavFilePath,
@@ -36,7 +37,8 @@ public class TrackContentService
         string artist,
         string? album = null,
         string? genre = null,
-        DateOnly? releaseDate = null)
+        DateOnly? releaseDate = null,
+        string? originalFileName = null)
     {
         try
         {
@@ -71,7 +73,8 @@ public class TrackContentService
                 Artist = artist,
                 Album = album,
                 Genre = genre,
-                ReleaseDate = releaseDate
+                ReleaseDate = releaseDate,
+                OriginalFileName = originalFileName
             };
 
             return trackEntity;