Update Grok for 0.2.118

[SDSLeon]

What changed

• disable Grok auto-update for Poracode-managed ACP, detection, authentication, and headless utility launches
• move title, commit, and one-shot generation to the supported grok-4.5 model
• resume known UUID sessions across project-directory moves while preserving -s for truly unmaterialized sessions
• refresh Grok 0.2.118 compatibility coverage and adapter comments

Why

Grok 0.2.118 retired the previous Composer utility model, recommends --no-auto-update for automated ACP/headless use, and can resume UUID sessions independently of the current directory. Poracode's cwd-local materialization check could incorrectly reuse -s after a project move, creating a blank duplicate instead of resuming the durable conversation.

Validation

• pnpm exec vitest run src/supervisor/agents/grok src/supervisor/agents/commandBuilders.test.ts — 100 passed
• pnpm run typecheck
• pnpm run lint
• pnpm run fmt:check
• full pnpm run test — 7,945 passed; two unrelated Windows Cursor temp-directory cleanup tests hit EPERM, then the isolated file rerun passed 8/8 with 2 skipped
• direct authenticated Grok 0.2.118 headless marker passed
• real isolated Poracode Electron/ACP smoke passed first turn, follow-up, stable provider session UUID, supervised permission denial, and zero console/runtime errors