fixing return file

api/app.py

@@ -93,7 +93,7 @@ def generate_design():
 
 
         # Return the image as a file download
-        return send_file(img_io, mimetype='image/jpeg', as_attachment=True, attachment_filename='generated_image.jpg')
+        return send_file(img_io, mimetype='image/jpeg', as_attachment=True, download_name='generated_image.jpg')
 
     except Exception as e:
         return str(e), 500