Copy code and copy message buttons overlap, easy to hit the wrong one

[charlesvien]

The copy button on a code block and the copy button on the surrounding message sit in overlapping hit areas. Aiming for the code block's copy button can land on the message-level copy button, dumping the entire message onto the clipboard instead of just the code.

https://posthog.slack.com/archives/C09G8Q32R6F/p1778253765834199