Unlock bmp picture file

1. want to use command to check image_file_extensions
2. want to unlock BMP file that does not change bmp to jpg/png because the result is not correct

Start by locating the command or entry point that handles image_file_extensions and image loading. Check how BMP files are currently detected or rejected, then verify that BMP remains available without conversion and that the image-extension check reports it correctly. The issue does not name a file or test, so the relevant coverage must be identified in the repository.

Written by the indexing model from the issue text.