openai/gpt-5.2-chat → B (10:1)

Commit B introduces a comprehensive URL canonicalization system (new url_rules module with engine and registry), adds a new dependency, refactors ItemId semantics across the codebase to use full canonical URLs, updates parsing, parent/breadcrumb logic, Reddit/YouTube normalization, event application, and adjusts extensive tests and state handling accordingly. It meaningfully changes core identity handling and architecture. Commit A is a trivial HTML change (span to disabled anchor). Therefore B contributes vastly more.