Danyalkhattak/lisa-ai ? reverse-engineered prompt

Build me a browser based voice assistant called Lisa AI that feels like a real conversation app.

People should be able to sign up or sign in, tap a microphone, speak to Lisa, and get a spoken reply back along with the text on screen. Use AI to answer questions naturally, save past conversations for each user, and include a simple settings page where they can adjust voice and app preferences. It should work nicely on desktop and mobile, feel modern and smooth, and keep the interface clean and easy to use.

If possible, make the voice responses use a realistic text to speech service, but fall back to the browser voice if needed. I also want the app to remember users securely and sync their data across sessions. Build the full experience end to end, and look up current docs online if you need to.