Jack000/Deepnest ? reverse-engineered prompt

Build me a desktop app for nesting parts for laser cutters and other CNC machines.

It should let me load in shapes like SVG and DXF files, arrange them tightly on a sheet, and give me an optimized layout that wastes as little material as possible. I need it to feel fast and reliable, with the nesting engine doing the heavy lifting behind the scenes, and it should handle really complex parts without freezing up. It would also be great if it can merge shared cut lines where possible, since that matters for laser cutting.

Make it look like a real production tool, with a simple interface for importing parts, starting the nest, and reviewing the final result. If you need to check current docs or best practices for any libraries, feel free to look them up online.