openai/gpt-chat-latest → B (3:2)

Side B adds a substantive new capability: a background Reddit fetch pipeline with request deduplication, rate-limit handling, optional OAuth, JSON parsing into entity data, and integration into application state so browsing or ensuring a node can populate metadata asynchronously. Side A mainly refactors navigation to canonical `/~/` browse URLs and removes the theme system while simplifying static asset handling; although useful and supported by tests, much of the patch is restructuring and feature removal rather than adding enduring functionality.