- Add featured image field to main event creation form with WordPress media uploader
- Implement featured image upload in organizer and venue creation modals
- Update AJAX handlers to process and validate featured image attachments
- Add comprehensive media upload UI with preview and removal functionality
- Include proper permission validation for administrator, trainer, and master trainer roles
- Create authoritative documentation for complete event creation page functionality
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
