0.6.1 - Keychron Caps lock fix

Caps Lock works again while the app owns a Keychron. With your own lighting off, pressing Caps Lock lit the keyboard's white indicator and nothing could ever turn it off. The firmware draws that indicator on top of the key and clears it only by the key being repainted - and a mixed-mode frame ends as soon as the rest-of-the-board region reports finished, which an "off" region is immediately, so most of the board was never repainted at all. The app now renders that rest itself: the per-key effect everywhere, every key outside the F-row held black. It looks exactly like off, but every LED is repainted each frame and the indicator switches off the moment Caps does. Num Lock on the full-size Ultras is covered by the same stroke.

The snapshot the app takes before touching the keyboard now covers every key's stored colour, not just the F-row's, and all of it is put back on Quit as before. On stock firmware, which ignores per-key brightness, "black" renders white - the 0.6.0 caveat, resolved by the same firmware fix.

Corsair behaviour is unchanged.

Upgrade: unzip, run once, delete the folder - the running copy is retired and replaced automatically. No agent restarts needed.