feat: Update Proxmox extension with various improvements and bug fixes

- Change listStates method to accept nullable integer for limit parameter.
- Modify TechnitiumDns class to return structured error messages on failure.
- Enhance VNC and xterm popup routes with user authorization checks.
- Update backups view to improve loading states and add unique keys for dynamic elements.
- Refactor cloud-init view to ensure proper data binding and improve user experience.
- Add wire:key attributes to various elements in views for better Livewire performance.
- Improve error handling and user feedback in the firewall view.
- Update server overview and statistics views to handle potential null values gracefully.
- Add new migration files to extend database schema with user-set icons and notes for Proxmox nodes.

extensions/Servers/Proxmox/Livewire/Subdomain.php

@@ -144,7 +144,7 @@ class Subdomain extends Component
             if (preg_match('/^fc[0-9a-f]{1,2}:/i', $ip) || preg_match('/^fd[0-9a-f]{1,2}:/i', $ip)) {
                 return false;
             }
-            if (strpos($ip, '::ffff:') === 0 || strpos($ip, '::ffff:') !== false) {
+            if (strpos($ip, '::ffff:') === 0) {
                 return false;
             }
             return true;
@@ -223,7 +223,7 @@ class Subdomain extends Component
     {
         $this->validate([
             'newSubdomain' => 'required|string|regex:/^[a-z0-9]([a-z0-9\-]{0,61}[a-z0-9])?$/i',
-            'selectedIpId' => 'required|exists:ext_proxmox_ip_addresses,id',
+            'selectedIpId' => ['required', \Illuminate\Validation\Rule::exists('ext_proxmox_ip_addresses', 'id')->where('server_id', $this->server->id)],
         ], [
             'newSubdomain.regex' => 'Invalid subdomain format. Use only letters, numbers, and hyphens.',
             'selectedIpId.required' => 'Please select an IP address.',
@@ -285,12 +285,6 @@ class Subdomain extends Component
                 $this->notify('This subdomain already exists for an IPv6 address on this server. Please choose a different name.', 'error');
                 return;
             }
-            
-            // Check if we already have both IPv4 and IPv6 for this subdomain
-            if ($existingIpv4Count > 0 && $existingIpv6Count > 0) {
-                $this->notify('This subdomain already exists for both IPv4 and IPv6 addresses on this server. Please choose a different name.', 'error');
-                return;
-            }
 
             // Create the subdomain via Technitium DNS API
             $dns = new TechnitiumDns;
@@ -532,9 +526,6 @@ class Subdomain extends Component
             
             $dns = new TechnitiumDns;
             if ($dns->deleteRecord($this->selectedZone, $name, $type, $ipAddress)) {
-                // Update database with new record list
-                $this->updateSubdomainRecords();
-                
                 $this->notify('DNS record deleted successfully!', 'success');
                 $this->loadZoneRecords();
             } else {