opennookorg/screenshot-studio ? reverse-engineered prompt

Build me a browser based screenshot editor and mockup maker that feels polished and easy to use. I want people to be able to drop in an image or code snippet, choose from a big set of nice backgrounds, add browser or device style frames, and then annotate everything with arrows, text, shapes, blur areas, and image overlays. It should also support turning code and tweets into beautiful images with different syntax themes, plus a simple timeline for adding motion and presets for animations. The finished tool should export high quality PNG, JPEG, and WebP, and also let people make short animated outputs like MP4, WebM, and GIF right in the browser. No signup, no watermarks, and it should feel fast and clean. If you need to look up current docs online for any browser features, go ahead.