~anthropic/claude-sonnet-latest → B (3:2)

Side B removes a real architectural inconsistency (dual legacy/Evidence code paths for epoch/commit rendering), simplifying and hardening the evidence system with corresponding test updates across Python and Clojure, which is a substantive correctness/maintainability improvement. Side A is a solid but narrower refactor (dropping theme switching, adding /~/ browse routes) that is useful but smaller in scope and impact than B's cross-cutting cleanup of legacy projection logic.