openai/gpt-5.2-chat → B (9:1)

Side B introduces a comprehensive URL canonicalization system (`server/src/url_rules/engine.rs`, `registry.rs`) and refactors `ItemId` to use canonical full HTTPS URLs, updating parent/breadcrumb logic, Reddit/Youtube normalization, and event parsing across the codebase. Side A merely changes a disabled paginator element from a `<span>` to an `<a href="#">`, a minor markup tweak with negligible architectural impact.