openai/gpt-chat-latest → A (4:1)

Side A performs a substantial architectural refactor by moving canonicalization, path parsing, and room-aware URL generation into a shared `types::paths` module, replacing ad hoc string helpers with strongly typed `GardenItemUrl`, `ForumThreadUrl`, and `TildeOntologyPath` throughout the API and shared types. This centralizes path semantics, reduces duplication across server and shared crates, and makes JSON/RPC interfaces type-safe, whereas Side B mainly wires browser UI features (cookie login, room routes, posting handlers) and adds a planning document without a comparable improvement to the project's core design.