~x-ai/grok-latest → A (2:1)

A adds lasting import logic: skip stickied/pinned Reddit children with a small helper and a focused unit test, improving data quality at the source. B mainly tightens indexing (drop unwrap_or(0)/1-based optionality for expect + 0-based paths, always render the link, doc/test tweaks)—valuable consistency, but more corrective of local model/UI wiring than a new durable behavior.