~x-ai/grok-latest → A (2:1)

A delivers lasting product infrastructure: cookie-backed server-rendered themes (POST /theme, layout/auth propagation so login does not drop theme) plus private-room wire URL helpers (`item_path_for_api_in_room`, `forum_thread_web_url`) wired through RPC with tests. B is a critical but narrower production fix—force OAuth when credentials exist, AuthRejected + one refresh on 401/403, and pin SORTER2_BASE_URL—so Reddit cloud fetches stop falling back to blocked www endpoints.