feat: implement ICT Congress 2026 certificate generation and management

[VulpritProoze]

Description

This PR introduces the certificate generation and management feature, currently scoped specifically for the upcoming ICT Congress 2026. It adds the ability for admins to manage certificate eligibility and provides a mechanism for students to view and download their certificates.

Changes Made

Frontend

• Student View (client-side-ts): Added the CertificatesPage and CertificateEventList components under features/certificates to allow attendees to access their certificates.
• Admin View (client-side): Added the EligibleCertificates page and restored admin routing to manage user eligibility for certificates.

Backend (server-side)

• Controllers & Routes: Implemented certificate.controller.ts and eligibleCertificate.controller.ts to handle certificate operations.
• Models: Created eligibleCertificate.model.ts to track attendee eligibility.
• Certificate Generation Engine:
  • Integrated EJS templates (certificate.ejs) for dynamic PDF rendering.
  • Added utility generate-pdf-from-ejs.ts for PDF generation.
  • Added necessary static assets (fonts, event logos, e-signatures).

Chore / Fixes

• Restored missing admin router routes.
• Cleaned up test artifacts and resolved minor build issues.

Notes & Known Limitations

• Hardcoded Event: As per current requirements, the certificate generation logic and assets are hardcoded for ICT Congress 2026. Future iterations will need to abstract this to support dynamic events.

Certificate Look Example

[vercel]

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