maya201/watermark-remover — reverse-engineered prompt

Build me a simple desktop app in Python that lets me remove light colored watermarks from lots of images at once.

I want a clean Mac and Windows style window where I can choose a folder, click start, and see live progress while it works through all jpg, jpeg, png, and webp images, including images inside subfolders. It should keep each image’s original name and format, and replace the original file after processing, but please make the UI clearly warn the user to back up important files first.

For the watermark removal, focus on the bottom right area of each image and detect near white watermark pixels, then repair that area so it blends in as well as possible. Use Python image processing tools for this.

Please include the main app code, the simple UI styling, requirements, and packaging setup so I can run it directly during development and also build Mac app and Windows exe versions.