Bring back the continuous recording the retired AHK-only driver had,
alongside the 3s frame captures: gdigrab 15fps to proof/<phase>/
recording.mkv, started before the installer/app launches and q-stopped
in the finally block win or lose. mkv stays playable when the process
dies unfinalized; skip gracefully when ffmpeg is not on PATH (it ships
on windows-latest). Lifecycle (start, null-skip, graceful q stop, clean
exit, playable output) verified locally with a lavfi source.
ethernet
005fc5a6eb