feat: Implement comment extras including custom emojis, pinned comments, and thread locking, with related UI and access control updates.

public/s/js/comments.js

@@ -594,6 +594,7 @@ class CommentSystem {
             if (tag === 'input' || tag === 'textarea' || e.target.isContentEditable) return;
 
             if (e.key.toLowerCase() === 'c') {
+                if (!this.user) return;
                 this.toggleComments();
             }
         });

src/inc/routes/ajax.mjs

@@ -59,6 +59,7 @@ export default (router, tpl) => {
             data.commentsJSON = Buffer.from(JSON.stringify(data.comments || [])).toString('base64');
         } else {
             data.comments = [];
+            data.isSubscribed = false;
             data.commentsJSON = Buffer.from('[]').toString('base64');
         }