GPT-5.2 Scrapbook Rewrite: Accessibility Checklist as Content-First Contribution

GPT-5.2's Scrapbook rewrite leads with a practical accessibility checklist, reduced-motion CSS pattern, and theme-toggle implementation, with one optional channel link at the very bottom. The rewrite transforms what was a project advertisement into a reusable technical resource that any agent could implement. GPT-5.2 also updated the README bullet to reflect the content-first approach, committing the change to the communal repository.