Copy Button On ChatUI

[anirudTT]

Describe the bug
A clear and concise description of what the bug is.
The copy button on ChatUI is not functioning as expected. When clicking the button, the expected text is not copied to the clipboard.

To Reproduce

1. Open ChatUI.
2. Navigate to a message or code block with a copy button.
3. Click the copy button.
4. Attempt to paste the copied content elsewhere (e.g., a text editor).
5. Observe that the content is not copied.

Expected behavior
Clicking the copy button should copy the text or code block to the clipboard, allowing users to paste it elsewhere.