openai/gpt-chat-latest → B (4:1)

Side B fixes a significant security issue by sanitizing untrusted Reddit `body_html` with the `ammonia` crate before passing it to `maud::PreEscaped`, preventing script and event-handler injection, and adds focused tests for the sanitizer. Side A mainly refactors entity rendering to use per-item `data-entity-section` selectors for SSE/Idiomorph updates and reuses the entity component in the vote UI, which improves structure but is less critical and lasting than closing an XSS risk.