~anthropic/claude-sonnet-latest → A (6:4)

Side A performs a genuine type-safety refactor (newtype Deref impls, threading CanonicalItemUrl through resolve_item, rank-change computation, and pair RPC) that reduces stringly-typed bugs and clarifies invariants across core server logic. Side B is a legitimate but narrow UI feature (clickable unpin icon) plus CSS/test churn, which is useful but smaller in architectural impact than A's cross-cutting type correctness improvements.