Greenscreen: countdown for testing

Hi Lumabooth team,

Another small request, this one for the greenscreen workflow.

Greenscreen calibration is delicate and really has to be tested from the exact spot where guests will stand. Right now, tapping the Test option fires the photo instantly, which means there's no time to step back into position — so the test photo doesn't actually reflect what guests will look like in the frame.

A short countdown (even just 2 seconds) before the test photo fires would solve this completely.

I also tried using the remote app to trigger the test from in-position, but it doesn't trigger the greenscreen test — only regular captures. If extending the remote to cover this is easier than adding a countdown, that would work too.

Thanks!

Best, Dan