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

Side A adds a genuine, well-tested feature (pretty `/~/` browse URLs backed by a canonical ItemId encoding) while cleanly removing an unused theme system, keeping the codebase coherent and reducing surface area. Side B's refactor swaps a bounded Deque for an unbounded List and defers capping to read time, which removes the write-time trim guarantee and risks unbounded storage growth for recent_votes, a more questionable trade-off despite its own test coverage.