Initial commit: Luftglanz drone website with integrated AI chat assistant

Features:
- Complete Luftglanz drone cleaning website
- AI chat assistant integrated with OpenAI API
- Expert product advice for AGO Quart and Mellerud cleaning products
- Formal German language support (Sie form)
- Secure PHP backend for API calls
- Responsive design with mobile support
- Product-specific knowledge base
- Safety statements from manufacturers
- Multi-page integration (index, products, services, contact)

Technical components:
- AI chat widget (js/ai-chat.js)
- Chat styling (css/components/ai-chat.css)
- Backend API (ai-chat-api.php)
- Product knowledge base with detailed specifications
- Demo and documentation files

js/contact-form.js

@@ -0,0 +1,39 @@
+document.addEventListener('DOMContentLoaded', function() {
+    const contactForm = document.getElementById('contact-form');
+    const nameInput = document.getElementById('name');
+    const emailInput = document.getElementById('email');
+    const messageInput = document.getElementById('message');
+    const submitButton = document.getElementById('submit-button');
+
+    contactForm.addEventListener('submit', function(event) {
+        event.preventDefault();
+        
+        const name = nameInput.value.trim();
+        const email = emailInput.value.trim();
+        const message = messageInput.value.trim();
+
+        if (validateForm(name, email, message)) {
+            // Simulate form submission
+            console.log('Form submitted:', { name, email, message });
+            alert('Thank you for your message! We will get back to you soon.');
+            contactForm.reset();
+        }
+    });
+
+    function validateForm(name, email, message) {
+        if (!name || !email || !message) {
+            alert('Please fill in all fields.');
+            return false;
+        }
+        if (!validateEmail(email)) {
+            alert('Please enter a valid email address.');
+            return false;
+        }
+        return true;
+    }
+
+    function validateEmail(email) {
+        const re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+        return re.test(String(email).toLowerCase());
+    }
+});