~anthropic/claude-sonnet-latest → B (6:4)

Side B fixes a real bug (Reddit children being imported with wrong path/ensure_path semantics, causing incorrect tree structure) and adds/fixes integration tests covering the actual behavior, which is a concrete correctness improvement. Side A adds a new feature (pool-scoped voting) that is useful but more speculative/UI-driven, with less test coverage and more surface area for edge cases (e.g., empty pool handling, query param backward compatibility).