openai/gpt-5.3-chat → A (2:1)

Side A changes core reducer behavior by removing an early return in `apply_vote`, allowing items/pairs to be registered even when ratios clamp to zero, and updates tests accordingly—this affects data integrity and processing semantics. Side B mainly adjusts UI rendering (highlighting, slider behavior, CSS) and adds helper functions/tests, which are valuable but not as foundational as altering the reducer’s logic.