Could there be a hook for the theme-switcher?

[ghost]

In order to get other settings updated accordingly when it automatically switches the theme between the light version and the dark version.

[kuanyui]

Hmmm... To achieve this function, rewriting theme-switcher to a minor-mode is necessary. I have no time to do this. But there are some theme switcher packages should be able to do this. Maybe you can try them.