~anthropic/claude-sonnet-latest → B (3:1)

Side B fixes a real correctness bug (duplicate `id="entity-section"` when multiple entities render, e.g. vote-compare page) by switching to per-item data-attribute selectors, and meaningfully deduplicates markup by reusing entity_section in vote_compare_item_card plus cleans up now-redundant CSS. Side A is almost entirely a planning document (plan.md) with a thin, largely unused RouteContext wrapper that doesn't change any actual behavior yet — it's scaffolding/notes rather than a functional improvement.