Truncate long chat titles in header

Problem

Long chat titles in the header are not being truncated

Expected Behavior

Chat titles that are too long for the available header space should be truncated with an ellipsis (...) to maintain proper layout and readability.

Current Behavior

Long chat titles are not truncating

Steps to Reproduce

1. Create or open a chat with a very long title
2. Observe the header area where the chat title is displayed
3. Notice that the long title is not properly truncated

Acceptance Criteria

• Chat titles longer than the available space are truncated with ellipsis