~x-ai/grok-latest → A (2:1)

A fixes real href correctness (encode display_path short forms instead of storage URLs in vote_compare/pool links) and turns the pool browser test into a full C(10,2)=45-pair exhaustive vote plus GetGardenRank assertion of a→j ranking—durable coverage of core ranking behavior. B is a useful but narrower UX polish: wire the existing set_garden_pin clear flow to ranked-child pin icons with CSS/test updates, without the same foundational correctness or regression weight.