openai/gpt-chat-latest → A (4:1)

Side A fixes a core correctness issue by changing Reddit children imports to attach entities directly under the requested parent without `ensure_path` creating incorrect `/comments/...` hierarchy, and updates the ranking panel to show imported child titles by looking them up in the global tree. It also propagates the new API through UI rendering and adds integration tests covering SSE updates and child fetching, whereas Side B is primarily a feature enhancement adding richer Reddit-specific rendering (thumbnails, images, links, CSS) and parsing fields without addressing a fundamental data-model bug.