openai/gpt-chat-latest → A (4:1)

Side A fixes a structural UI issue by replacing the hard-coded `#entity-section` target with per-item `data-entity-section` selectors, adds a reusable selector helper, and reuses the same `entity_section` component in the voting UI, reducing duplication and enabling correct morph/SSE updates for multiple entities. Side B changes sibling navigation so each unranked sibling becomes its own group and adds a focused test, but its impact is limited to one navigation behavior compared with A's broader architectural improvement and component reuse.