IMPROVEMENT make pangu optional & make hugo comments

layouts/partials/after-content-js.html

@@ -14,6 +14,8 @@
 <!-- fancybox -->
 <script src="https://cdn.jsdelivr.net/npm/@fancyapps/ui/dist/fancybox.umd.js"></script>
 
+{{/* a pangu support */}}
+{{ if .Site.Params.features.pangu }}
 <!-- pangu.js -->
 <script>
     pangu.spacingElementByClassName('moment-note');
@@ -23,4 +25,5 @@
         // listen to any DOM change and automatically perform spacing via MutationObserver()
         pangu.autoSpacingPage();
     });
-</script>
+</script>
+{{ end }}