~x-ai/grok-latest → A (3:1)

A fixes real tokio RwLock deadlocks in RoomCreate/RoomGrant by dropping read guards before nested lock acquires, plus hardening the test harness against pipe-buffer hangs and adding a room-create integration test. B is mainly vote-compare UX polish (fullscreen chrome-less layout, history sort/display, CSS/docs) that improves one UI surface but does not address correctness or reliability at the same level.