Inconsistent avatar resizing in Directory Users Table compared to Admin Table

Description:

In the Directory > Users tab, user avatars shrink incorrectly when:

1. Screen width is reduced
2. Users have long display names or usernames
3. Compared to the Admin > Users table, where avatars maintaina consistent size

Steps to reproduce:

1. Create a test user with a long display name
2. Go to Directory > Users tab
3. Reduce the browser window
4. Observe avatars shrinking in size
5. Compare with Admin > Users table (avatars maintain fixed size)

Actual behaviour:

Avatars shrink with the available space, becoming inconsistent with long names.

Directory> Users Tab

https://github.com/user-attachments/assets/c66147cf-4bed-41b5-8f49-87a3321616b2

Expected behaviour:

Avatars should maintain a consistent size.
Text should truncate with ellipsis ... when space is limited, similar to Admin Users table behaviour.

Admin> Users Tab

https://github.com/user-attachments/assets/154efaab-22bf-477f-b0c5-a4c1330a5856

Server Setup Information:

• Version of Rocket.Chat Server: develop branch (latest)
• Operating System: Linux
• NodeJS Version: 22.16.0

Client Setup Information

• Operating System: linux

Additional context

none

Relevant logs:

Start by comparing the Directory > Users table with the Admin > Users table while reproducing the issue using a long display name or username and a narrow browser window. Trace the table and avatar presentation entry points, then verify that avatars retain a consistent size and text truncates with an ellipsis in the Directory view.