openai/gpt-chat-latest → A (3:2)

Side A delivers two lasting functional improvements across the codebase: a complete server-backed theme system (cookie persistence, theme selection, propagation through layouts, preserving the theme across authentication redirects) and correct room-aware URL generation for RPC/web responses via new helper functions with accompanying tests. Side B adds substantial Reddit background-fetch infrastructure with OAuth, rate limiting, and parsing, but it is only partially integrated (triggering fetches while rendering/importing) and leaves rendering and broader functionality unfinished, reducing its immediate long-term project value.