~x-ai/grok-latest → B (2:1)

B adds the core /vote compare surface, bridge-aware pair selection in pair.rs, ItemId::from_storage canonicalization, and in-place morph after votes—foundational product/ranking design with tests. A is real lasting security (fail-closed resolve_vote_actor, mock-OAuth gate, Secure cookies, open-redirect hardening) plus nav alias polish, but it hardens an existing path rather than delivering the main voting/ranking capability.