~x-ai/grok-latest → A (4:1)

A delivers lasting product value: chromeless fullscreen compare layout, correct left/right ratio orientation and strength-sorted edge history, working post-success morph of the ingest preview, CSS, and a unit test. B is a necessary but tiny fix—defining GITHUB_API_BASE_URL so OAuth stops NameErroring—valuable but narrow compared with A’s design and behavior changes.