openai/gpt-chat-latest → B (4:1)

Side B fixes a real correctness bug by moving the zero-ratio guard before any side effects in the reducer, preventing ghost items and incorrectly recorded voted pairs, and updates the test to verify no state is registered. Side A introduces a substantial new `/ui` endpoint, form templating, and UI action infrastructure, but it is primarily new feature work and refactoring rather than addressing a demonstrated correctness issue with lasting integrity impact.