Build a React.js frontend for a blockchain-based certificate verification system with two main portals: University Portal and Employer Portal (use React Router for navigation).
University Portal features:
1. Login page (username, password) with link to registration.
2. Registration page: University name, wallet address, public key input, email verification flow.
3. Dashboard with sidebar for navigation (Issue Certificate, View All Certificates, Revoke Certificate).
4. Issue Certificate: Form for certificate details, upload signed PDF, QR code generation, "Send to Student" button opens Gmail compose with filled email.
5. View All Certificates: Table/list of issued certificates (search/filter, clickable for details).
6. Revoke Certificate: Form for certificate ID, show details, revoke button.
Employer Portal features:
1. Verification page: Input for certificate ID or scan QR code.
2. Result page: Certificate details, signature verification result, status (Valid/Revoked/Not Found).
Use Material-UI or Chakra UI for clean styling (optional), Axios for backend/footer API calls, and qrcode.react for QR code.
Create React components and router structure for all r…
