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

Side B tightens type-safety by threading CanonicalItemUrl/GardenItemUrl newtypes (with Deref) through resolve_item, validate, rpc, and rank-change computation, eliminating stringly-typed round-tripping and reducing risk of canonicalization bugs across many call sites. Side A is a narrower UX fix (vote-count tooltip, HUD unpin behavior) with a matching unit/browser test, useful but more localized than B's structural correctness improvement.