24-Hour Email Confirmation System

I’m adding a registration flow to my social network and need a secure email-based confirmation step. The flow must generate a unique token, send it through my existing email service provider, and automatically invalidate the link after 24 hours if it isn’t clicked.

A fully branded, custom-designed HTML email is required, and it has to render correctly across major clients. The template must also support multiple languages from the same codebase so that I can drop in additional translations without rebuilding the layout.

Please integrate the logic with my current ESP (details provided once we start) and expose clear hooks so the front-end can trigger resends and display meaningful “link expired” messages.

Deliverables
• Token generation & 24-hour expiry logic
• API or controller endpoints for verify, resend, and expired states
• Responsive, custom HTML email template with placeholder text in at least two languages
• Installation notes or migration script so I can replicate the setup in staging and production
• Brief test plan proving that expired links are rejected and valid links activate the account only once

All code should be clean, well-commented, and easy for another developer to extend later.