refactor: reposition modals in Proxmox firewall view to enhance viewport darkening and layout consistency

extensions/Servers/Proxmox/views/firewall.blade.php

@@ -2266,7 +2266,9 @@
     </div>
 </div>
 
-<!-- Modals (outside main container to escape overflow-hidden) -->
+</x-proxmox::layout>
+
+<!-- Modals (placed outside layout to properly darken entire viewport) -->
 
 <!-- Error Message Modal -->
 @if($error && $showErrorModal)
@@ -2531,5 +2533,3 @@
             </div>
         </div>
     @endif
-
-</x-proxmox::layout>