openai/gpt-chat-latest → A (9:1)

Side A implements a user-visible functional improvement by making pinned child-group icons submit the existing POST /ui unpin action, threads the redirect path through rendering, updates styling, and adds comprehensive browser tests covering unpinning from the ranked list and HUD behavior. Side B primarily adds a planning document plus a thin RouteContext wrapper export without migrating call sites or changing behavior, so its lasting impact is much smaller despite outlining future work.