refactor: update navigation to use push/pop and add conditional dashboard redirection for agents

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

@@ -613,8 +613,10 @@ class _ContactScreenState extends State<ContactScreen> {
               child: Row(
                 mainAxisAlignment: MainAxisAlignment.center,
                 children: [
-                  const Text(
-                    'Start Your Search',
+                  Text(
+                    (ref.read(authProvider).user?.role == 'AGENT')
+                        ? 'Go to Dashboard'
+                        : 'Start Your Search',
                     style: TextStyle(
                       fontFamily: 'Fractul',
                       fontSize: 16,