I extracted many functions from the copy_model to the new util folder and its new files (dir_modifiers, file_modifiers, fetchers), fixed a bug with month folder numberings on 'persian month ad year' mode. I created a template class for copy_model and copy_view. I addded app icon to the project root to prevent some bugs. I switched to 'uv' for project management. I added type annotations to necessary variables and return type annotations to functions. I made the copy_model functions cleaner and more readable. I removed the unnecessary _progress_bar_updater function from the copy_model. Etc.