openai/gpt-chat-latest → A (4:1)

Side A replaces a large, fragile autocomplete transition-graph parser with a small URL extractor that returns a subreddit, rewires the UI to redirect directly on success, removes the obsolete parser action/rendering machinery, and adds focused parsing tests. Side B is a useful configuration cleanup—centralizing base-URL generation via `util/get-base-url`, using `window.location.origin`, and updating deployment to the staging branch—but it is primarily infrastructure and environment handling rather than a core behavioral simplification.