victortassinari/FossFLOW ? reverse-engineered prompt

Build me a browser based app for making beautiful isometric infrastructure diagrams.

I want to be able to drag components onto a canvas, connect them with lines, move things around easily, and save my work as I go. It should feel like a simple diagram editor, but with that clean 3D isometric look for servers, cloud services, databases, and other tech icons. Please make it work offline too, since I want to use it like a normal app after installing it.

I’d also like import and export for diagrams so I can share them as files, plus a quick save option and automatic saving in the background. If possible, let me use my own custom icons too, and have them look consistent with the built in ones. A settings panel for a few useful controls like hotkeys and panning would be great. If you need to check current docs or examples online, go ahead and look them up.