Identical standalone probe, compiled against each version; synthetic time and offscreen windows.

BFI 1.14.19.8
Timer-return guard accepted: True
First light alpha=0, delay ms=1
Commands emitted after injected 1 ms startup delay: 1
Engine while old worker alive: False
Restart executed without another click: False
Synthetic dispatch delay and offscreen lifecycle probe; no optical measurement.

BFI 1.14.19.9
Timer-return guard accepted: True
First opening deferred: True
Commands emitted after injected 1 ms startup delay: 0
Engine while old worker alive: False
Restart executed without another click: True
Synthetic dispatch delay and offscreen lifecycle probe; no optical measurement.

