Simple math website completion

About job

We need further improvements to our app at simplestmath.com The app must be fully functional, visually polished, and aligned exactly with the methodological guidelines provided in the description of the atomic, step-by-step learning approach. The top navigation menu has been expanded. A logo has been added. Authentication has been implemented, including email/password registration and login, as well as sign-in with Google and Facebook. A database has been set up to track each student’s progress and engagement with the app, including counts of correct vs. incorrect tasks and progress analytics. Deployment is required on the VPS at simplestmath.com. The codebase must follow software engineering best practices. The database must be PostgreSQL. The backend must be implemented in TypeScript, and the frontend in vanilla JavaScript. The app must be responsive and provide a comfortable touchscreen experience on mobile phones and tablets.