openai/gpt-chat-latest → B (5:2)

Side B introduces a substantial architectural shift from flat scope-based rankings to a hierarchical `ItemId`/`GlobalTree` model, adding canonical URL parsing, breadcrumb navigation, per-node rankings, event replay for tree nodes, and a journal worker while updating vote handling and integration tests accordingly. Side A is a well-implemented user-facing feature that adds a garden ranking copy button with markdown generation, `/ui` action handling, permissions, and tests, but it primarily extends existing UI behavior rather than changing the project's core data model.