- Enhanced error messages for Zoho CRM connection test failures
- Added detailed error information display in admin UI
- Created diagnostics.php script for advanced troubleshooting
- Improved logging with file, line, and stack trace information
- Added client ID, secret, and refresh token validation checks
- Enhanced CSS styling for error messages and debugging info
- Added configuration status checks to help identify issues
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
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