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

Side B unifies the auth flow with the shared layout/JS pattern (removing a bespoke redirect-based layout, adding inline error/success fragments and generalizing the poem-JS morph behavior), which is a real architectural simplification with broader reuse. Side A is a solid, well-tested UX addition (unpin from ranked list) but is more narrowly scoped and mostly wiring/CSS/test changes rather than structural improvement.