openai/gpt-chat-latest → B (9:1)

Side B introduces a substantial URL canonicalization framework by extracting normalization into a new `url_rules` module, adopting canonical `https://` ItemIds, updating parsing, parent/breadcrumb logic, Reddit URL handling, event application, and adding tests for these behaviors. Side A only changes a disabled paginator control from a `<span>` to an `<a href="#">`, a minor UI tweak with far less lasting architectural impact.