KrishKrosh/TrackWeight ? reverse-engineered prompt

Build me a macOS app that turns a MacBook Force Touch trackpad into a simple digital weighing scale.

I want a clean, easy to use window that shows the live weight reading in grams, with a big obvious number and a clear status message telling me when my finger contact is detected and when I can place an object on the trackpad. The app should feel polished and straightforward, not technical. It should support the basic calibration and measurement flow from the README, and make it easy to start and stop a reading.

Use the trackpad pressure data available on modern MacBooks, and make sure the app works on macOS 13 or later. If you need to look up current docs online for the trackpad access part, go ahead. Keep the experience simple, accurate, and focused on showing the weight clearly, with sensible messaging for the limitations around needing finger contact and certain objects affecting readings.