~x-ai/grok-latest → A (2:1)

A restores broken E2E auth by fixing real mock-server bugs (query split on #"=", getRequestBody vs getInputStream, 302 content-length, null-safe token/state, handler error handling) plus selector-based login assertions. B is a clean, tested product tweak (skip stickied/pinned listing children) but narrower in scope than unblocking auth flows and correcting the shared OAuth/Reddit test doubles.