- Fix undefined constants in HVAC_Zoho_CRM_Auth class
- Add conditional constant checking for all Zoho configuration constants
- Update zoho-admin.php to use correct method signature for make_api_request
- Create zoho-config.php with default configuration values
- Ensure all ZOHO_* constants have fallback defaults when undefined
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
- Implement OAuth 2.0 authentication for Zoho CRM
- Add sync functionality for Events → Campaigns, Users → Contacts, Orders → Invoices
- Create staging mode that prevents production syncs from non-production domains
- Build admin interface for sync management
- Add comprehensive field mapping between WordPress and Zoho
- Include test scripts and documentation
- Ensure production sync only on upskillhvac.com domain
