def main() -> None:
    """Entry point of the TLP Battery Boost application.

    - Configures the logging level based on the `DEBUG` constant.
    - Parses command-line arguments to determine the GUI theme and font settings.
    - Instantiates the main `App` class with the chosen theme and fonts.
    - Starts the Tkinter main event loop.
    - Handles user interrupts and ensures clean shutdown.
    - Revokes any elevated permissions acquired during execution.

    Exceptions:
        KeyboardInterrupt: Gracefully exits if the user sends an interrupt
            signal (e.g., Ctrl+C). The GUI is destroyed if it was created.
        Exception: Any unhandled exception during app initialization or
            execution is logged as critical and causes the program to exit
            with a non-zero status.
    """
    debug_level = logging.DEBUG if DEBUG else logging.WARNING
    logging.basicConfig(
        level=debug_level,
        format="%(levelname)s: %(name)s %(message)s",
    )

    theme_choice, font_normal, font_small, factor = parse_args(sys.argv[1:])
    app = None
    try:
        app = App(theme_choice, font_normal, font_small, factor)
        app.mainloop()
    except KeyboardInterrupt:
        if app:
            app.destroy()
    # Catchall if App fails to launch with unhandled exception.
    except Exception as exc:  # pylint: disable=broad-exception-caught
        logging.critical(exc)
        sys.exit(1)
    finally:
        revoke_permissions()