~x-ai/grok-latest → B (2:5)

B delivers a lasting product surface: /login becomes a real account page (trust weight, alias list/switch, claim forms, OAuth re-link) with shared claim UI, CSS, and test updates. A is a solid parser design fix (drop Rc<RefCell>, Send+Sync handlers, OnceLock-cached graph) but stays an internal efficiency/thread-safety refactor with less user-facing value.