jeeexcalibur/Serenity-Booth — reverse-engineered prompt

Build me a pretty browser based photo booth app called Serenity Booth. I want it to feel clean, soft, and modern, and work well on both desktop and mobile.

The main flow should let someone open the app, allow camera access, see a live preview, use a countdown, and snap photos right in the browser. Let them choose between a few photo layouts like a classic strip and a grid, add simple filters and fun effects, drag and place stickers, and pick different backgrounds before saving the final image. Please make sure everything happens locally in the browser so photos are private and nothing gets uploaded anywhere.

I also want the interface to feel polished and easy for non technical people to use, with clear buttons and a smooth experience from capture to final download. If anything is missing, look up current browser camera and canvas best practices and finish it in a clean way.