fix: use orange color for PMG host backups instead of purple

Changed PMG host backup badges from purple to orange since PBS
already uses purple. This avoids color confusion between PBS
instances and PMG host configuration backups.

Color scheme:
- VM: Blue
- LXC: Green
- Host/PMG: Orange
- PBS: Purple (unchanged)

frontend-modern/src/components/Backups/BackupsFilter.tsx

@@ -147,7 +147,7 @@ export const BackupsFilter: Component<BackupsFilterProps> = (props) => {
                 onClick={() => props.setTypeFilter!('Host')}
                 class={`px-2.5 py-1 text-xs font-medium rounded-md transition-all ${
                   props.typeFilter!() === 'Host'
-                    ? 'bg-white dark:bg-gray-800 text-purple-600 dark:text-purple-400 shadow-sm' 
+                    ? 'bg-white dark:bg-gray-800 text-orange-600 dark:text-orange-400 shadow-sm' 
                     : 'text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-gray-100'
                 }`}
               >

frontend-modern/src/components/Backups/UnifiedBackups.tsx

@@ -1691,7 +1691,7 @@ const UnifiedBackups: Component = () => {
                               item.type === 'VM'
                                 ? 'bg-blue-100 text-blue-700 dark:bg-blue-900/50 dark:text-blue-300'
                                 : item.type === 'Host'
-                                ? 'bg-purple-100 text-purple-700 dark:bg-purple-900/50 dark:text-purple-300'
+                                ? 'bg-orange-100 text-orange-700 dark:bg-orange-900/50 dark:text-orange-300'
                                 : 'bg-green-100 text-green-700 dark:bg-green-900/50 dark:text-green-300'
                             }`}>
                               {item.type}