openai/gpt-chat-latest → B (4:1)

Side B performs a substantial architectural consolidation by moving browser posting, checking, and redaction into the unified `POST /ui` `HtmlUiAction` flow, introducing `WebSession` resolution, removing the separate `web_post.rs` implementation, updating forms and client-side checks to use `__rpc__`, and adapting integration tests. Side A mainly improves the vote-compare UI with a fullscreen layout, preview morph, reordered edge history, and related styling/tests, which is valuable but more feature-focused and less foundational than the routing and request-handling refactor in B.