Prithvi-Web/TreeMap-Disk-Visualizer ? reverse-engineered prompt

Build me a cross platform desktop app that helps people understand what is using up their disk space and clean it up safely. It should scan the local machine, show the results in a clear dashboard with charts and a treemap made of colored squares, and let me drill into folders, search for files, and see the biggest space hogs right away. I want to be able to open files from the app and send unwanted files to the system Trash instead of deleting them permanently.

Make it feel polished on macOS, Windows, and Linux, and keep it self contained so it does not need a lot of setup. If it makes sense, include useful extras like duplicate finding, folder history or trends, and a simple way to export the scan results. Please make the experience fast and easy to use, and keep safety in mind so nothing is hard deleted.