openai/gpt-chat-latest → B (4:1)

Side B adds a substantial new end-to-end capability by introducing a CLI `room create` command, wiring it through RPC, updating server handling, simplifying the room model by removing the unused visibility field, and updating tests and documentation accordingly. Side A improves UI presentation by changing rank-row color mapping from list position to per-group score normalization with good test coverage, but it is primarily a visualization refinement rather than a core feature or architectural simplification.