- Add beautiful HTML email templates for receipts, admin notifications, and contact forms
- Implement SMTP email service with Nodemailer and Handlebars templating
- Add carbon equivalency calculations with EPA/DEFRA/IMO 2024 conversion factors
- Add portfolio color palette system for project visualization
- Integrate Wren API portfolio fetching in webhook handler
- Add light mode enforcement for email client compatibility
- Include Puffin logo from MinIO S3 in all templates
- Add test email endpoint for template validation
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
