Detect current sudoless correctly

bin/omarchy-sudo-passwordless-toggle

@@ -6,7 +6,8 @@
 
 NOPASSWD_FILE="/etc/sudoers.d/99-omarchy-nopasswd-${USER}"
 
-if [ -f "$NOPASSWD_FILE" ]; then
+# sudo -n succeeds without a password prompt when passwordless sudo is active
+if sudo -n true 2>/dev/null; then
   sudo rm "$NOPASSWD_FILE"
   echo "Passwordless sudo has been DISABLED. Sudo will require a password again."
 else