openai/gpt-chat-latest → B (3:2)

Side B makes a deeper architectural change by replacing the durable recent-vote deque with an append-only list, removing write-time trimming logic, updating the in-memory representation, bumping the storage schema version, and adding a test that verifies query-time capping. Side A improves usability by making pinned child-group icons submit the existing unpin flow and adds browser coverage, but it is a localized UI enhancement rather than a broader storage/design improvement.