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/System.php

@@ -387,8 +387,8 @@ class System extends Component
         }
 
         return collect(explode(';', $clean))
-            ->map(fn ($flag) => ltrim($flag, '+-'))
-            ->filter()
+            ->map(fn ($flag) => ltrim($flag, '+'))
+            ->filter(fn ($flag) => $flag !== '' && !str_starts_with($flag, '-'))
             ->unique()
             ->values()
             ->toArray();
@@ -418,6 +418,12 @@ class System extends Component
             return;
         }
 
+        // Check VM status - must be stopped to remove EFI/TPM devices
+        if (!$this->status || $this->status->status !== 'stopped') {
+            $this->notify('VM must be stopped to remove system devices.', 'error');
+            return;
+        }
+
         // Get the device definition before removing it
         $deviceDefinition = null;
         if (str_starts_with($deviceKey, 'efidisk') && isset($this->efiDisks[$deviceKey])) {
@@ -547,6 +553,12 @@ class System extends Component
             return;
         }
 
+        // Check VM status - must be stopped to add EFI disk
+        if (!$this->status || $this->status->status !== 'stopped') {
+            $this->notify('VM must be stopped to add an EFI disk.', 'error');
+            return;
+        }
+
         $slot = 'efidisk0';
         $volumeName = 'vm-' . $this->server->vm_id . '-efidisk0';
         
@@ -589,6 +601,12 @@ class System extends Component
             return;
         }
 
+        // Check VM status - must be stopped to add TPM device
+        if (!$this->status || $this->status->status !== 'stopped') {
+            $this->notify('VM must be stopped to add a TPM device.', 'error');
+            return;
+        }
+
         $version = trim($this->newTpmVersion);
         $slot = 'tpmstate0';