Hi Ralf (@rkorell),
Stefano here! Thank you so much for the detailed explanation and the kind words!
I can confirm to the whole community that v1.6.0 works perfectly with a real Home Assistant setup. The Auto-Discovery payload is recognized immediately by HA, creating a native switch.magicmirror_screen entity out of the box.
The behavior is super smooth: switching it ON holds the screen and modules active, and turning it OFF allows PSC to handle the graceful countdown to standby via counterTimeout.
Thank you again for your open collaboration and for turning a issue/discussion into such a brilliant feature for the module!
Warm regards,
Stefano (papinist)