~x-ai/grok-latest → A (3:2)

A fixes core data-model wiring (replacing link_child + ensure_path with apply_entity_under_parent so listing imports do not pull Reddit comment-path segments) and makes unranked children show real titles via the tree—lasting correctness in import and UI. B adds a useful RoomList RPC/CLI with solid isolation tests, but the server logic is a straightforward grants filter, so the higher-impact design fix is A.