openai/gpt-chat-latest → B (2:3)

Side B adds a substantial new UI command infrastructure: a unified `POST /ui` endpoint, typed `HtmlUiAction` parsing from JSON form templates with `$form` substitution, reusable web-post handlers, new routing, and tests, enabling broader browser interactions with shared server logic. Side A refactors recent-vote storage from a deque to an append-only list with query-time capping and removes write-time trimming, which is a meaningful storage design change, but its scope is narrower than the new reusable UI architecture introduced in Side B.