~x-ai/grok-latest → A (2:1)

A fixes real import/model wiring (apply_entity_under_parent so listing children attach without ensure_path pulling Reddit comment segments) and lasting UI correctness (child titles in the ranking panel), with broader call-site and integration-test coverage. B is a sharp, necessary reducer invariant fix (drop zero-ratio votes before ensure_item/voted_pairs), but it is a narrower edge-case correction than A’s import-path and display design changes.