- Add interactive modal popup for announcement 'Read More' functionality
- Fix nonce conflict by creating separate hvac_announcements_ajax object
- Implement secure AJAX handler with rate limiting and permission checks
- Add comprehensive modal CSS with smooth animations and responsive design
- Include accessibility features (ARIA, keyboard navigation, screen reader support)
- Create detailed documentation in docs/ANNOUNCEMENT-MODAL-SYSTEM.md
- Update API-REFERENCE.md with new modal endpoints and security details
- Add automated Playwright E2E testing for modal functionality
- All modal interactions working: click to open, X to close, ESC to close, outside click
- Production-ready with full error handling and content sanitization
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Co-Authored-By: Claude <noreply@anthropic.com>
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