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

Side B fixes a real UX bug (HUD 'pinned item' link navigating away instead of properly unpinning, replaced with a correct POST-based unpin form), adds a genuinely useful vote-count indicator with backing unit test, and includes corresponding CSS and browser-test coverage. Side A is a smaller, more localized change replacing a fallback default with a panic/expect and updating doc comments/tests, which is reasonable but lower-impact and riskier (introducing a potential panic) compared to B's broader, well-tested feature fix.