Fix downloadFile

salesbook.Shared/Core/Interface/IAttachedService.cs

@@ -8,5 +8,7 @@ public interface IAttachedService
     Task<AttachedDTO?> SelectImageFromGallery();
     Task<AttachedDTO?> SelectFile();
     Task<AttachedDTO?> SelectPosition();
-    Task OpenFile(Stream file, string fileName);
+
+    Task<string> SaveToTempStorage(Stream file, string fileName, CancellationToken ct = default);
+    Task OpenFile(string fileName, string filePath);
 }