openai/gpt-chat-latest → A (3:2)

Side A adds a new end-to-end `room create` CLI command wired through the RPC, including authentication handling, output, documentation, and tests, while also simplifying the data model by removing the unused room visibility field and replacing the room registry with a simpler `HashSet`. Side B improves Reddit presentation with thumbnails, full-image rendering, outbound links, CSS, and parsing/tests, but those are primarily UI enhancements rather than foundational project functionality.