Fix contact form submission errors and restore full functionality

- Fix JavaScript syntax errors preventing form submission
- Update reCAPTCHA configuration with working test keys
- Restore comprehensive spam protection (reCAPTCHA v3, AJAX validation, rate limiting)
- Switch from minified to source JS file to apply critical fixes
- Add missing security headers and form validation

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

contact-handler.php

@@ -2,6 +2,8 @@
 // Enhanced Contact Form Handler with Security
 session_start();
 
+// Form handler restored - temporary fix removed
+
 // Include reCAPTCHA config
 require_once '.recaptcha-config.php';