laurent22/joplin ? reverse-engineered prompt

I'd like you to build a complete, open-source note-taking application that's focused on privacy. It should work across all major platforms: Windows, macOS, Linux, Android, and iOS. The core idea is that it's an "offline-first" app, so I always have my data on my device, even without an internet connection.

Notes should be in Markdown, and I want to be able to organize them into different notebooks and add tags. A critical feature is end-to-end encrypted synchronization that can connect to various cloud services like Dropbox, OneDrive, or Nextcloud. It also needs a solid import tool to pull in all my old notes from Evernote—including images, attachments, and metadata. Finally, please create a companion web clipper extension for Chrome and Firefox so I can save web pages and screenshots directly into the app.