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/Display.php

@@ -70,7 +70,7 @@ class Display extends Component
             $proxmox = new Proxmox;
             $config = $proxmox->request(
                 '/nodes/' . $this->server->node->name . '/qemu/' . $this->server->vm_id . '/config'
-            )->json()['data'];
+            )->json()['data'] ?? [];
 
             [$type, $memory] = $this->parseDisplayString($config['vga'] ?? null);
 
@@ -196,9 +196,11 @@ class Display extends Component
     {
         $options = $this->displayPresets;
 
-        if (!isset($options[$this->selectedDisplay])) {
-            $options[$this->selectedDisplay] = [
-                'label' => strtoupper($this->selectedDisplay) . ' (custom)',
+        // Only add the original loaded display type as a custom option, not player-controlled input
+        $originalDisplay = $this->original['selectedDisplay'] ?? null;
+        if ($originalDisplay && !isset($options[$originalDisplay])) {
+            $options[$originalDisplay] = [
+                'label' => strtoupper($originalDisplay) . ' (custom)',
                 'description' => 'Currently configured in Proxmox. You can keep it or choose another option.',
                 'supports_memory' => false,
             ];