signalapp/Signal-iOS ? reverse-engineered prompt

Build me a simple privacy focused iPhone messaging app in Swift, similar in spirit to Signal. I want people to communicate privately with friends in a clean chat interface, with a conversation list, individual chat screens, message bubbles, timestamps, and a way to compose and send new messages. Make the app feel trustworthy and simple, not like social media. Please avoid analytics or tracking, and treat privacy as a core product requirement throughout the code.

Set it up as a real Xcode project that can run on iOS, with sensible app structure, reusable UI components, and clear places where secure messaging logic would live. Include a basic share flow if it fits naturally, so someone could send content into the app from iOS.

Keep the first version focused and working. Use mocked local data if a real backend is too much for now. Look up current Apple docs online if you need to.