openai/gpt-chat-latest → A (4:1)

Side A adds substantial end-user functionality by introducing Reddit-specific rendering (thumbnails in ranking lists, full post cards), extending EntityData with image/link metadata, implementing Reddit parsing helpers for those fields, and adding a regression test with a fixture. Side B is primarily a type-safety refactor that changes many APIs from String to CanonicalItemUrl and adds Deref implementations, improving code clarity but with little visible behavioral change compared with A's new capabilities.