Design-complete, not yet implemented. Captures the root cause (verified vs
upstream: #6 enabling the trigger apply-bits is the only haptic deviation; the
0x36 audio frame re-broadcasts state[] at ~100 Hz, re-firing the latched
trigger effect on the audio clock = the buzz), and the exact USB-faithful fix:
a state_set_frame() one-shot that emits trigger FFB once per host update then
goes trigger-neutral, plus the three call-site swaps. Includes build + HIL
verification steps. Resume on the main PC with hardware.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
