openai/gpt-chat-latest → A (4:1)

Side A makes a substantive storage-model redesign by replacing the durable recent-vote deque with an append-only list, removing post-commit trimming, updating the schema version, and enforcing the cap at read time with a regression test. Side B largely simplifies the UI by deleting the complex autocomplete/parser graph in favor of a paste-and-go textarea and redirect flow, which is a product simplification but removes substantial functionality rather than adding durable infrastructure.