~x-ai/grok-latest → B (2:5)

B fixes real production deadlocks by dropping tokio RwLock guards before nested read/write in RoomCreate and RoomGrant, and hardens tests against pipe-buffer hangs; that is lasting correctness. A is a polished UX feature (CopyGardenRank + markdown formatting and UI wiring) with good tests, but it is additive convenience rather than a foundational fix.