Function show_folder_rules_dialog 

fn show_folder_rules_dialog(
    parent: &impl IsA<Window>,
    folder_path: &str,
    fallback_catchup_mode: StartupCatchupMode,
    rules_state: Rc<RefCell<FolderRules>>,
    on_settings_changed: Rc<dyn Fn()>,
)

Present a modal dialog for editing a folder’s sync and filter rules.