Attachment image not clickable

Description:

Images sent as attachment using image_url are not clickable

Steps to reproduce:

1. Sent message with attachment
2. Add image_url in the attachment
3. Check the image
4. Mouse will suggest link on hover
5. Click is not implemented

Expected behavior:

When i click an image it will expand

Actual behavior:

Nothing happens

Additional context

When compared to link-preview we can see that the image attachment has a different class and attributes..
Adjusting this to the same as in link-preview the click and expand will work.

e.g.
original where click and expand is not working

<img class="gallery-item" data-src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRQ6uESwmWmLq7bJbrbhquA7su_ZCMphg0aZhxvfylOdQ&amp;s" alt="" width="360" height="360" loading="lazy" src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRQ6uESwmWmLq7bJbrbhquA7su_ZCMphg0aZhxvfylOdQ&amp;s">

adjusted the class to be generic-preview and renamed data-src to data-id which enables click and expand

<img alt="" width="360" height="360" loading="lazy" src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRQ6uESwmWmLq7bJbrbhquA7su_ZCMphg0aZhxvfylOdQ&amp;s" class="rcx-message-generic-preview__image preview-image" data-id="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRQ6uESwmWmLq7bJbrbhquA7su_ZCMphg0aZhxvfylOdQ&amp;s">

Search the frontend for the attachment image markup using gallery-item, image_url, and rcx-message-generic-preview__image, then compare it with the link-preview rendering. Reproduce the issue with an image attachment and verify that clicking the image opens the expanded preview without affecting other attachment behavior.