harry0703/MangoDisk ? reverse-engineered prompt

Build me a safety first desktop app for macOS and Windows that helps people free up disk space without accidentally deleting anything important.

I want it to scan a computer and show where storage is going in a simple, visual way, like a treemap and a clear file list. It should find big files, exact duplicate files, and common cleanup targets like caches, logs, browser data, app leftovers, developer tool junk, build artifacts, and temporary files. It should also let people uninstall apps and remove related leftover files, manage startup items, and offer a few system optimization suggestions for performance and privacy.

Please make the app always scan in read only mode first, then show a review screen before anything is deleted or changed. It should keep an operation history so users can see what happened later. Make the interface polished, easy to understand, and safe by default. If you need to check current docs or platform details, look them up online first.