openai/gpt-chat-latest → A (9:1)

Side A performs a substantial architectural refactor by extracting forum functionality into focused modules (such as access, ingest, navigation, room members, and new thread handling) and centralizing reusable logic like URL helpers and permission checks, improving maintainability without changing behavior. It also adds a useful developer profiling script (`sample-fixture`) and removes redundant helper wrappers by inlining simple RPC generation, whereas Side B mainly repositions the delete button within the post metadata and adjusts CSS layout for that UI change.