I want a progressive web app that transcribes my voice using Whisper API and lets me copy the transcription to the clipboard. The app should be very simple - just (from top to bottom) a logo.png, big red record/stop button, a text field (where transcription appears) and a big `copy to clipboard` button. You click to record, click again to stop, it's sent to Whisper API and then transcribed, then appears in text field to copy. The design should be done very much with phones as in mind as that's where I will be using it. It would be a nice effect if when recording the button changes color and throbs. It would also be a nice effect if the background was a light gradient - from very light purple to very light pink. Style could maybe have some neon colors. This can be a ONE PAGE APP. We do NOT need to save to firebase so NO NEED for firebase config. This is a mobile first app so will definitely need manifest.json, even if we cant send to whisper api when offline.