openai/gpt-chat-latest → A (9:1)

Side A implements a substantial architectural improvement: it replaces implicit Reddit fetches with explicit user-triggered imports, persists full upstream payloads via a new EntityImported event, replays them into state, adds configurable API/OAuth endpoints and dotenv loading, and includes integration/tests around the new behavior. Side B fixes a real reducer bug by moving the zero-ratio guard ahead of item/pair registration to prevent ghost entries and incorrect voted_pairs state, but it is a narrowly scoped correctness fix compared with A's broader lasting functionality.