~x-ai/grok-latest → A (3:1)

A adds lasting foundation: form_template hole-fill, HtmlUiAction + POST /ui, shared run_* web_post paths, and expand-in-place new-thread UI—architecture later commits build on. B is a correct but narrow multi-layer vote-ratio guard (≥1, ≤100) with tests; valuable domain tighteness, but smaller scope than A’s design surface.