openai/gpt-chat-latest → B (4:1)

Side B introduces concrete functionality: typed form substitution for `{"$form:i32": ...}` with tests, support for a `next` redirect after recording votes, routing and UI plumbing for a voting flow, and corresponding client-side behavior. Side A mainly replaces the URL canonicalization implementation with references to new `graph`/`parse` modules while deleting the old engine from the shown patch, making it primarily a structural refactor in the visible changes rather than a clearly demonstrated functional improvement.