~x-ai/grok-latest → A (5:1)

A introduces the lasting POST /ui architecture: form_template hole-filling, HtmlUiAction parsing, the ui_html dispatcher, shared run_* web_post helpers, and routing—foundational design reused project-wide. B only adds one feature (CopyGardenRank + markdown clipboard JS and buttons) on top of that already-existing stack, so its value is narrower and dependent.