openai/gpt-chat-latest → B (3:2)

Side B fixes a concrete data-model bug in Reddit child imports by introducing `apply_entity_under_parent`, avoiding incorrect path nesting while still storing entity data, and updates the ranking panel to display imported child titles instead of path-derived labels. It also expands integration tests to cover SSE updates and child fetching. Side A adds a useful new pool-scoped voting feature and threads pool context through navigation, but it is primarily a feature addition rather than a correctness fix to existing behavior.