openai/gpt-chat-latest → A (3:2)

Side A adds durable user-facing and API behavior: it implements persistent theme selection via validated cookies and a `/theme` endpoint, preserves theme across authentication, threads theme state through page rendering, and fixes room-aware URL generation throughout the RPC layer with dedicated helpers and tests. Side B introduces a useful developer-only offline `sorterc` tool for compiling `.sorter` files and scanning `events.jsonl`, but its impact is primarily on development workflows rather than the application's core runtime behavior.