openai/gpt-chat-latest → A (5:1)

Side A delivers substantial new functionality and infrastructure: it adds a dedicated pairwise voting page, pair-selection logic that prioritizes bridge comparisons across ranking components, in-place UI morphing after votes, identifier normalization via `ItemId::from_storage`, and accompanying tests. Side B is a focused extension that threads an optional `pool` parameter through the existing vote flow and adds a 'vote on children' entry point, but it primarily builds on mechanisms that Side A introduces rather than providing comparable foundational value.