fix: Prevent template variables from becoming links (#10725)

# Pull Request Template

## Description

**Issue**
This PR fixes template variables in messages (e.g., {{customer.name}})
that were being incorrectly converted to clickable links by the
`MessageFormatter's linkify` functionality. This caused formatting
issues and broken links.

**Solution**
Added a `linkify` parameter to `MessageFormatter` to optionally disable
link conversion

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)

## How Has This Been Tested?

**Screenshots**

**Before**
<img width="1012" alt="image"
src="https://github.com/user-attachments/assets/70abb238-b4d9-439d-9e51-c7513cf482fb"
/>


**After**
<img width="1012" alt="image"
src="https://github.com/user-attachments/assets/387acb74-674e-4b26-85cc-2d7190d256b1"
/>




## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

app/javascript/shared/composables/specs/useMessageFormatter.spec.js

@@ -30,6 +30,18 @@ describe('useMessageFormatter', () => {
         '<a href="https://twitter.com/hashtag/hashtag"'
       );
     });
+
+    it('should disable link formatting when linkify is false', () => {
+      const message = 'Check https://example.com and {{user.id}}';
+      const result = messageFormatter.formatMessage(
+        message,
+        false,
+        false,
+        false
+      );
+      expect(result).not.toContain('<a href="https://example.com"');
+      expect(result).toContain('{{user.id}}');
+    });
   });
 
   describe('truncateMessage', () => {

app/javascript/shared/composables/useMessageFormatter.js

@@ -14,11 +14,13 @@ export const useMessageFormatter = () => {
    * @param {boolean} isAPrivateNote - Whether the message is a private note.
    * @returns {string} - The formatted message.
    */
-  const formatMessage = (message, isATweet, isAPrivateNote) => {
+  // TODO: ref:https://github.com/chatwoot/chatwoot/pull/10725#discussion_r1925300874
+  const formatMessage = (message, isATweet, isAPrivateNote, linkify) => {
     const messageFormatter = new MessageFormatter(
       message,
       isATweet,
-      isAPrivateNote
+      isAPrivateNote,
+      linkify
     );
     return messageFormatter.formattedMessage;
   };

app/javascript/shared/helpers/MessageFormatter.js

@@ -1,6 +1,7 @@
 import mila from 'markdown-it-link-attributes';
 import mentionPlugin from './markdownIt/link';
 import MarkdownIt from 'markdown-it';
+
 const setImageHeight = inlineToken => {
   const imgSrc = inlineToken.attrGet('src');
   if (!imgSrc) return;
@@ -30,25 +31,27 @@ const imgResizeManager = md => {
   });
 };
 
-const md = MarkdownIt({
-  html: false,
-  xhtmlOut: true,
-  breaks: true,
-  langPrefix: 'language-',
-  linkify: true,
-  typographer: true,
-  quotes: '\u201c\u201d\u2018\u2019',
-  maxNesting: 20,
-})
-  .use(mentionPlugin)
-  .use(imgResizeManager)
-  .use(mila, {
-    attrs: {
-      class: 'link',
-      rel: 'noreferrer noopener nofollow',
-      target: '_blank',
-    },
-  });
+const createMarkdownInstance = (linkify = true) => {
+  return MarkdownIt({
+    html: false,
+    xhtmlOut: true,
+    breaks: true,
+    langPrefix: 'language-',
+    linkify,
+    typographer: true,
+    quotes: '\u201c\u201d\u2018\u2019',
+    maxNesting: 20,
+  })
+    .use(mentionPlugin)
+    .use(imgResizeManager)
+    .use(mila, {
+      attrs: {
+        class: 'link',
+        rel: 'noreferrer noopener nofollow',
+        target: '_blank',
+      },
+    });
+};
 
 const TWITTER_USERNAME_REGEX = /(^|[^@\w])@(\w{1,15})\b/g;
 const TWITTER_USERNAME_REPLACEMENT = '$1[@$2](http://twitter.com/$2)';
@@ -56,10 +59,17 @@ const TWITTER_HASH_REGEX = /(^|\s)#(\w+)/g;
 const TWITTER_HASH_REPLACEMENT = '$1[#$2](https://twitter.com/hashtag/$2)';
 
 class MessageFormatter {
-  constructor(message, isATweet = false, isAPrivateNote = false) {
+  constructor(
+    message,
+    isATweet = false,
+    isAPrivateNote = false,
+    linkify = true
+  ) {
     this.message = message || '';
     this.isAPrivateNote = isAPrivateNote;
     this.isATweet = isATweet;
+    this.linkify = linkify;
+    this.md = createMarkdownInstance(linkify);
   }
 
   formatMessage() {
@@ -74,7 +84,7 @@ class MessageFormatter {
         TWITTER_HASH_REPLACEMENT
       );
     }
-    return md.render(updatedMessage);
+    return this.md.render(updatedMessage);
   }
 
   get formattedMessage() {

app/javascript/shared/helpers/specs/MessageFormatter.spec.js

@@ -16,6 +16,13 @@ describe('#MessageFormatter', () => {
         '<p>Chatwoot is an opensource tool. <a href="https://www.chatwoot.com" class="link" rel="noreferrer noopener nofollow" target="_blank">https://www.chatwoot.com</a></p>'
       );
     });
+    it('should not convert template variables to links when linkify is disabled', () => {
+      const message = 'Hey {{customer.name}}, check https://chatwoot.com';
+      const formatter = new MessageFormatter(message, false, false, false);
+      expect(formatter.formattedMessage).toMatch(
+        '<p>Hey {{customer.name}}, check https://chatwoot.com</p>'
+      );
+    });
   });
 
   describe('parses heading to strong', () => {