fix: Fix agent name in Twitter channel private note acting as a link (#4326)

app/javascript/shared/helpers/MessageFormatter.js

@@ -13,8 +13,9 @@ const TWITTER_HASH_REPLACEMENT =
 const USER_MENTIONS_REGEX = /mention:\/\/(user|team)\/(\d+)\/(.+)/gm;
 
 class MessageFormatter {
-  constructor(message, isATweet = false) {
+  constructor(message, isATweet = false, isAPrivateNote = false) {
     this.message = DOMPurify.sanitize(escapeHtml(message || ''));
+    this.isAPrivateNote = isAPrivateNote;
     this.isATweet = isATweet;
     this.marked = marked;
 
@@ -35,7 +36,7 @@ class MessageFormatter {
   }
 
   formatMessage() {
-    if (this.isATweet) {
+    if (this.isATweet && !this.isAPrivateNote) {
       const withUserName = this.message.replace(
         TWITTER_USERNAME_REGEX,
         TWITTER_USERNAME_REPLACEMENT