goldie: App Store assets for the app in this repo

goldie replays argent YAML flows on an iOS simulator, captures raw screenshots and recordings, and turns them into upload-ready assets: screenshots get a device bezel, a background, and marketing copy; the preview video is the raw recordings joined as-is, since Apple requires app previews to be a plain screen recording with no framing or captions. A React studio shows the result as the real store page. Your job is everything goldie cannot do alone: pick the screens worth marketing, author the flows that reach them, write the copy, and drive the pipeline.

The end state: 4 or 5 framed screenshots and the raw clips for a preview video, visible in the studio at http://localhost:4321, with the video rendering in the background.

Before anything: check for an existing goldie setup