clawnify/open-design — reverse-engineered prompt

Build me a self hosted Canva style design app for making social media graphics, mainly LinkedIn posts, quote cards, announcements, tips, stats, and simple profile cards. I want a polished dark editor that feels modern and easy to use, with a main canvas, template picker, toolbar, and a properties panel for whatever is selected.

It should let people add and edit text, choose from a small set of good fonts, change size, weight, alignment, spacing, and colors. Add basic shapes, upload images by drag and drop or click, and set solid, gradient, or image backgrounds. Include useful size presets for square, landscape, portrait, and story formats. Make undo and redo work well, and export clean 2x PNGs for posting online.

Please save designs locally with no cloud dependency, using SQLite and local uploads, and auto save changes. Include a few built in templates to start from. Also make an agent friendly mode with obvious buttons at ?agent=true, plus simple API endpoints for designs, templates, and uploads. Look up current docs online if needed.