~x-ai/grok-latest → A (3:2)

Side A introduces a full semantic URL graph (DFA traversal, builder validation, parse/canonicalize/breadcrumbs, generic fallback) with broad, lasting design and dense unit coverage for Reddit/YouTube equivalence. Side B fixes a real empty /-/ index bug via external_root_host_items and adds structured GitHub import cards plus render hooks, but much of the diff is a module move/refactor of existing resolver code plus CSS/layout polish.