fix: recover naturally exited browser cleanup

[0thernet]

Summary

• recover a pinned agent-browser cleanup when its daemon exits naturally, but only after repeated inactive-session, unchanged-root, dead-owner, and three-refusal proofs
• perform no close or process signal on the natural-exit recovery path and add deterministic drift/ambiguity regressions
• prepare the coherent 0.16.7 release surfaces, generated bundles, and exact package-budget provenance while retaining the published 0.16.6 baseline

Validation

• focused browser recovery suite: 53 passed, 461 assertions
• package-budget regression: passed
• two npm 11.19.0 packs were byte-identical at 2,214,418 packed bytes, 12,233,921 unpacked bytes, and 466 files
• canonical bun run check: typechecks, website tests/build, 64 npm-release tests, package identity/smoke, 3,709 broad tests plus one intentional skip, 18 Omni tests, and standalone smoke all green
• independent final review: no P0-P2 findings

[vercel]

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Project	Deployment	Actions	Updated
wrench	Ready	Preview	Sep 5, 2026 9:06pm UTC