To optimize your mobile app,follow this structured approach:

1. Assess and Optimize Website:

   
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   • Use CSS Grid for responsive design instead of the old CSS table.
   • Move images to a shared folder for better mobile optimization.
   • Ensure the site is mobile-friendly and test across different devices.

2. Plan the App Structure:

   • Maintain a consistent layout across all devices.
   • Update the navigation bar and logo for mobile-friendly design.

3. Build and Test the App:

   
   （图片来源网络，侵删）
   • Create a new mobile-first browser extension and copy the existing website's code.
   • Test the app on different devices, starting with the mobile device.
   • Use testing frameworks like Miro to simulate multiple browsers for responsiveness.

4. Implement Optimization:

   • Use the Filesystem API to handle mobile-specific files.
   • Clean up the app and remove unnecessary images or storage methods.
   • Compress files to save space on mobile devices.

5. Ensure Performance and Accessibility:

   • Optimize the app code for efficiency to prevent performance issues.
   • Ensure proper labels and accessibility features for screen readers.
   • Verify that the app structure is intuitive and easy to use on mobile devices.

By following these steps, you'll build a robust mobile app that is responsive, optimized, and accessible.