Added
- Touch buttons that show their entity's state. A button control in
the freeform editor takes an optional Entity (the sameha:binding a
switch uses). While that entity is on, the button is drawn filled,
ink field with paper label and icon, and it goes back to an outline
when it turns off; the tap still fires whatever action the button has.
It follows the live values stream like a switch, so an external change
in Home Assistant repaints it. Needs firmware 1.38 or later on the
panel to draw the filled state; the composed preview shows it on any
device.