~anthropic/claude-sonnet-latest → A (6:4)

Side A completes an actually missing capability (CLI `room create` calling RPC) end-to-end across CLI, RPC, reducer, and docs, and simultaneously simplifies the room model by removing the unused ThreadVisibility distinction (rooms→HashSet), reducing complexity and bug surface. Side B adds a well-tested but narrower UX convenience (clipboard copy of garden rankings) that, while polished with unit/integration/browser tests, is additive feature surface rather than closing a functional gap or simplifying existing design.