weicongzhan/zhihuishu-language-app ? reverse-engineered prompt

Build me a cross platform language learning app for web, iOS, and Android that feels simple and friendly to use.

It should support English, Arabic, Egyptian Arabic, and Chinese, and let each learner pick their language and continue from where they left off on any device. I want the app to suggest a learning path based on the user’s progress and preferences, then guide them through interactive practice like lessons, quizzes, and review activities. Keep the experience smooth, modern, and easy to navigate.

Please make it work as a Flutter web app with a backend API and a small database for storing users, progress, and learning content. If you need to check current docs or best practices for deployment, look them up online. Also make sure the app is ready to deploy on Cloudflare so it can run fast on the web and sync data properly across devices.