openai/gpt-chat-latest → B (4:1)

Side B performs a substantive type-safety refactor by changing `resolve_item` to return `CanonicalItemUrl` instead of `String` and propagating canonical path types through validation, ranking, pair selection, and RPC code, eliminating repeated parsing/wrapping and reducing opportunities for path-handling mistakes. Side A mainly enhances the UI (vote counts beside compare links, HUD unpin button, CSS, browser test) with a small helper and test, which is useful but less foundational than the project-wide canonicalization and API cleanup in Side B.