feat: Implement actual API call for sending contact messages with Dio, including phone number, and add error handling.

lib/features/contact/presentation/screens/contact_screen.dart

@@ -627,9 +627,10 @@ class _ContactScreenState extends State<ContactScreen> {
   }
 
   // -- Send Message --
-  void _sendMessage() {
+  Future<void> _sendMessage() async {
     final name = _nameController.text.trim();
     final email = _emailController.text.trim();
+    final phone = _phoneController.text.trim();
     final message = _messageController.text.trim();
 
     if (name.isEmpty || email.isEmpty || message.isEmpty) {
@@ -644,8 +645,15 @@ class _ContactScreenState extends State<ContactScreen> {
 
     setState(() => _isSending = true);
 
-    // Simulate sending — replace with actual API call
-    Future.delayed(const Duration(seconds: 2), () {
+    try {
+      final dio = ApiClient.instance.dio;
+      await dio.post('/contact', data: {
+        'name': name,
+        'email': email,
+        if (phone.isNotEmpty) 'phone': phone,
+        'message': message,
+      });
+
       if (!mounted) return;
       setState(() => _isSending = false);
       _nameController.clear();
@@ -658,7 +666,16 @@ class _ContactScreenState extends State<ContactScreen> {
           backgroundColor: Color(0xFF638559),
         ),
       );
-    });
+    } catch (e) {
+      if (!mounted) return;
+      setState(() => _isSending = false);
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(
+          content: Text('Failed to send message. Please try again.'),
+          backgroundColor: Colors.red,
+        ),
+      );
+    }
   }
 
 }