DevToys-app/DevToys ? reverse-engineered prompt

Build me a polished desktop app that works like a Swiss Army knife for developers. I want one safe place where I can quickly paste text or files and run common little tasks without using random websites.

The app should feel modern and clean, with a sidebar or searchable tool list, favorites, recent tools, and a smart detection feature that can look at my clipboard or pasted content and suggest the right tool. Include common tools like JSON and YAML conversion, date and number conversion, URL, HTML, Base64, GZip and JWT decoding, QR code generation, JSON, SQL and XML formatting, hash and checksum generation, password and lorem ipsum generation, PNG and JPEG compression, regex and JSONPath testing, markdown preview, text comparison, and basic text analysis.

Make it extensible so more tools can be added later. Keep privacy in mind, most tasks should run locally. Make the first version feel complete enough to use every day.