lymphatus/caesium-image-compressor ? reverse-engineered prompt

Build me a desktop app called Caesium that helps people shrink image files without making them look bad. It should let me add photos, pick JPG, PNG, WebP, or TIFF, and quickly reduce file size, with an option to lower the resolution too if I want. The app should feel simple and friendly, with a clean interface for choosing images, seeing what will be compressed, and saving the optimized files somewhere I choose.

Make it work on Windows, Mac, and Linux, and keep it responsive and polished. If it makes sense, include basic support for multiple languages and a straightforward settings screen for compression options. I’d also like the app to be built in a way that can be packaged for each platform cleanly, and if you need to check current docs for Qt or anything else, go ahead and look them up online.