openai/gpt-chat-latest → B (5:1)

Side B performs a substantive refactor by consolidating the query input UI into `html::input_panel`, removing the separate `parser_render` module, updating call sites, simplifying the main page, and adjusting tests to match the new structure. It also adds a development watch task and cleans up related code, whereas Side A is primarily a UI tweak that replaces text labels with '+'/'-' controls, removes headings/buttons, and adds a placeholder without changing core behavior.