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

B is a substantive, type-safe refactor that moves scattered string-based URL/canonicalization logic into a shared slug-types crate with correct-by-construction newtypes (GardenItemUrl, ForumThreadUrl, TildeOntologyPath), reducing duplication and improving safety across many call sites while preserving test coverage. A is a smaller, well-scoped feature addition (pool-scoped voting) that adds real user value but touches less surface area and is more incremental/local in impact than B's foundational cleanup.