openai/gpt-chat-latest → A (4:1)

Side A delivers multiple lasting functional improvements: it adds pairwise vote counts to garden vote controls with a tested helper (`edge_vote_count_for_pair`), converts the pin HUD into a proper `POST /ui set_garden_pin clear` unpin action instead of a permalink, updates CSS for the new UI, and extends browser tests. Side B is a narrower follow-up that makes the ranked-list pinned icon submit the same unpin flow and adjusts styling/tests, but it largely builds on infrastructure introduced by Side A rather than adding comparable new capability.