~x-ai/grok-latest → B (3:2)

B pushes CanonicalItemUrl through resolve_item, validate, rank-change maps, pair selection, and connectivity stats, cutting String↔newtype churn and embedding lasting type safety (plus Deref on href newtypes). A ships real UX fixes (HUD unpin via set_garden_pin clear, pairwise vote counts, CSS/tests) but is local garden/UI surface work rather than core path model cleanup.