Self-heal blank bookmark terminals

What's Changed

• Replace a browser-local xterm instance when its startup replay barrier stalls while preserving the running server session.
• Bound recovery to one session-local recreation and replay the retained terminal buffer without re-entering the stale parse barrier.
• Harden the bookmark startup performance gate so the typed codex command is not mistaken for the rendered Codex interface.

Release integrity

Native archives have matching platform-specific SPDX SBOM assets plus GitHub build-provenance and SBOM attestations. Installers and the built-in updater additionally verify a signed manifest and all packaged-file hashes.

Verification guide · Security policy