openai/gpt-chat-latest → B (3:2)

Side B fixes a substantive concurrency bug by ensuring `RwLock` read guards are dropped before later `read().await`/`write().await` calls in RPC handlers, preventing potential deadlocks during room creation and grants. It also adds an integration test covering private room creation and improves test robustness with logging and HTTP timeouts, whereas Side A mainly enhances the garden UI (vote counts, HUD unpin button, styling) with supporting tests rather than addressing a core correctness issue.