openai/gpt-chat-latest → A (5:2)

Side A delivers substantial end-user functionality and infrastructure: it adds a full pairwise voting page, intelligent pair selection based on connected components, in-place UI morphing after votes, ID normalization via `ItemId::from_storage`, and corresponding integration/tests. Side B mainly introduces a generic `/ui` endpoint and form-template mechanism, refactors existing web-post handlers for reuse, and adds lazy expansion of new-thread forms; while useful architectural work, it is less directly impactful than the new voting workflow and correctness improvements in Side A.