HeadVoice replay

Replay sessions (head pose, eye openness and signal quality, as the OpenCV 5 pipeline outputs them; no video) through each interface setup on AWS, and see what the adaptation agent decided and why.

Research and education prototype, not a medical device. Replay uses recorded measurements, so it cannot show how a person would react to a changed layout. Fatigue is simulated by shrinking recorded head movements over the session. Sessions marked "Simulated user" come from the simulated-users study (a model of a user driving the real app), not from recordings of people.