Mac Duo — https://github.com/ninobc/mac-duo
Copyright (c) 2026 Nino Bouchedid — MIT
Vendored revision: e96bb5370651355e32ec1ad919d5f33550b13133
Reused: DuoCore geometry/curves/spring, DuoRender Metal renderer/shaders,
LidAngle HID reader. Motch uses its own controller, capture lifecycle and UI.
Local renderer modification: a nonblocking in-flight frame limit
and drawable timeout enabled. Offscreen test rendering is unchanged.
