def action_toggle_theme(self) -> None:
        """Toggle the light/dark mode theme."""
        config = load_config()
        config.light_mode = not config.light_mode
        save_config(config)
        # pylint:disable=attribute-defined-outside-init
        self.app.dark = not config.light_mode
Toggle the light/dark mode theme.
frogmouth/screens/main.py