openai/gpt-chat-latest → A (8:1)

Side A performs a substantial architectural refactor by splitting the large forum module into focused modules (`access.rs`, `ingest.rs`, `nav.rs`, `new_thread.rs`, `room_members.rs`) and adds a reusable `sample-fixture` development tool, while preserving the existing UI behavior by inlining or relocating RPC generation. Side B is a narrow cleanup that simplifies `vote_compare_post_success_js` by removing unused parameters and no longer morphing the `#vote-compare-preview` content, making it primarily a localized code simplification rather than a broad, lasting structural improvement.