openai/gpt-chat-latest → A (4:1)

Side A makes a substantive persistence-model redesign by replacing the durable recent-vote deque with an append-only list, removing post-commit trimming, updating schema versioning, changing in-memory storage, and adding a test that verifies query-time capping of recent votes. Side B mainly improves UI behavior (HUD unpin action and displaying pairwise vote counts) with associated styling and browser/tests, which is useful but has less architectural impact than the storage and data-flow simplification in Side A.