~anthropic/claude-sonnet-latest → B (6:4)

Side B adds genuine user-facing functionality (clickable unpin from ranked child groups) with corresponding CSS and expanded browser test coverage, fixing a real UX gap. Side A is mostly a route rename and minor cleanup (removing a swap button, fixing a fallback edge case), which is useful but smaller in scope and partly cosmetic (renaming /vote/compare to /vote across many call sites).