Fix stale LXC entries and improve orphaned script cleanup

- Improved cleanupOrphanedScripts to use pct list for more reliable container verification
- Added batch processing by server for better efficiency
- Added double-check with config file existence before deletion
- Added manual cleanup button in Installed Scripts tab for on-demand cleanup
- Improved error handling and logging throughout cleanup process
- Fixes issue where deleted containers (like Planka) were still showing in the UI

src/app/_components/InstalledScriptsTab.tsx

@@ -935,6 +935,18 @@ export function InstalledScriptsTab() {
           >
             {showAutoDetectForm ? 'Cancel Auto-Detect' : '🔍 Auto-Detect LXC Containers (Must contain a tag with "community-script")'}
           </Button>
+          <Button
+            onClick={() => {
+              cleanupRunRef.current = false; // Allow cleanup to run again
+              void cleanupMutation.mutate();
+            }}
+            disabled={cleanupMutation.isPending}
+            variant="outline"
+            size="default"
+            className="border-warning/30 text-warning hover:bg-warning/10"
+          >
+            {cleanupMutation.isPending ? '🧹 Cleaning up...' : '🧹 Cleanup Orphaned Scripts'}
+          </Button>
           <Button
             onClick={() => {
               // Trigger status check by calling the mutation directly