- Resume: fire the REST transcript prefetch and the session.resume RPC in
parallel, and skip the redundant message conversion + reconciliation
when the prefetch already hydrated the transcript.
- Haptics: web-haptics builds its AudioContext lazily on first trigger,
paying the ~850ms CoreAudio spin-up on the first streamStart haptic as
the first token paints. Open/close a throwaway context at idle so the
real one connects to an already-warm audio service.
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