openai/gpt-chat-latest → B (3:2)

Side B introduces a reusable browser UI command infrastructure: a new `/ui` endpoint, `HtmlUiAction` parsing with JSON template hole substitution, shared `run_*` handlers for existing web actions, and routing/module integration. Side A delivers a useful feature by adding pool-scoped voting (`pool` query handling, next-pair navigation, and UI links), but it is a targeted capability layered on existing code, whereas Side B establishes broader architectural support that can be reused by future browser interactions.