Thank you for the new build.
It's very nice to be able to change frontlight settings in Coolreader now and to toggle frontlight
Just a suggestion: If possible, remove level 0 from the frontlight settings (inside Coolreader and in Settings in the Launcher). There is the toggle and the checkmark, level 0 is not really necessary.
Also it might happen that the light get turned to 0 accidentally which is very annoying in the dark. I never manage to turn on frontlight again without external light...