Antim21/Pixel-QR-Code ? reverse-engineered prompt

Build me a polished QR code web app called Pixel QR Code that feels premium and easy to use. I want one place where someone can learn how QR codes work, generate a QR from a link, text, Wi Fi info, a photo, or a file, decode a QR from an uploaded image, and scan one live from the camera in the browser. It should have a beautiful dark mode, a clean modern layout, and the QR generator should let me change colors, add a logo in the center, pick error correction, and export as PNG or SVG.

Also include a simple URL shortener area that makes long links easier to scan, with a preview of the shortened QR and a history of recent links. If it needs a backend for local file sharing or shortening, set that up too. Keep everything fast, privacy friendly, and working smoothly on desktop and mobile.