feat(voice): model spoken exchanges with XState

[charleslpan]

Summary

• add a Node-free XState v5 chart for spoken exchange lifecycle, turn origin, restart, notice hold, and resource ownership
• make the chart authoritative for the ordinary renderer conversation and introduction takeover while retaining WebRTC transport and act validation
• bind press audio and idle retirement to their active chart actors, wire observed notices into the chart-owned hold queue, and gate session tool execution with the developer-opened-turn projection
• remove the shadow parity path and duplicate hook-level status, latch, pending-turn, exchange-kind, and restart decisions
• keep Stately inspection opt-in and unavailable in packaged, fixture, and evidence runs

Evidence

• Platform-independent checks: ./scripts/check.sh passed, including 2,415 tests, recursive typechecks, and builds
• Focused statechart tests: 16 passed, 0 failed
• Desktop tests: 785 passed, 0 failed
• macOS Electron verification (./scripts/verify.sh): portable checks and builds passed; visual evidence stopped at error: this command requires macOS on the Linux Cloud Agent

Automated visual evidence

Download the deterministic macOS evidence · workflow run

• Commit: 1a5c4184fedd5468b70c0b17ef57e22ed5afaf5d
• Scenario: smoke
• Physical-notch check: not performed by CI

Physical-device evidence

• Screenshot or screen recording: not attached
• Physical-notch check: not performed
• Device/display configuration: Linux Cloud Agent; no macOS display

Notes

• RealtimeVoiceSession remains the browser/WebRTC implementation; the statechart owns public lifecycle, resource lifetimes, and authorization projections.
• Final ownership-audit commit: 1a5c418.
• CI remains responsible for macOS-only visual verification.

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1 Skipped Deployment

Project	Deployment	Actions	Updated
luke-web	Skipped		Sep 1, 2026 4:35am UTC

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