--- "aicodeman": minor --- Add Grok Build (xAI `grok`) as a seventh CLI run mode. SessionMode gains 'grok', with its own resolver (version-probed, since the name has npm squatters; GET /api/grok/status surfaces path + version), GrokConfig (model, alwaysApprove -> --always-approve, resume/continue), GROK_*/XAI_* env allowlist entries, the multi-user only-if-sent bypass clamp, Docker (own image step + per-file credential seeding) and remote-SSH command defaults, cron agentType, run-mode/welcome/tab UI with a charcoal identity, and docs (grok-integration.md + plan). Verified end to end against grok 1.0.5 on an isolated instance.