openai/gpt-chat-latest → A (3:2)

Side A delivers a coherent identity redesign: OAuth providers become private links to a canonical UUID, adds Reddit OAuth end-to-end, handles account-link conflicts, exposes linked providers safely, and fixes trust-weight projection updates by tracking pending writes within a batch. Side B is a broad API refactor that consolidates many endpoints into an RPC layer and renames thread/room concepts, but much of the patch is migration and relocation of existing logic rather than introducing comparably new functionality.