Enhance Proxmox views with improved loading states and UI updates

- Updated serverplaceholder.blade.php to enhance loading skeletons for server details.
- Added navigation breadcrumbs to statistics, subdomain, and system views for better user experience.
- Improved loading indicators for CPU, network, memory, and disk charts in statistics.blade.php.
- Refined storage.blade.php layout with section dividers and improved drive display, including bus type indicators and quota usage.
- Enhanced VNC and Xterm popups with a new header design, loading animations, and reconnect functionality.
- Added error handling for VNC and Xterm connections to inform users when unable to connect.

extensions/Servers/Proxmox/Livewire/Subdomain.php

@@ -408,6 +408,13 @@ class Subdomain extends Component
             return;
         }
 
+        // Verify the IP address belongs to this server
+        $ipBelongsToServer = $this->server->ipAddresses->contains('id', $this->ipAddressIdToDelete);
+        if (!$ipBelongsToServer) {
+            $this->notify('Unauthorized: IP address does not belong to this server.', 'error');
+            return;
+        }
+
         try {
             $dns = new TechnitiumDns;
             if ($dns->deleteZone($this->subdomainToDelete, $this->ipAddressIdToDelete)) {