pbcopy and xclip can not write to clipboard

Thank you for developing such a great tool. It is beautiful and powerful. I am using windterm 2.5 on macOS 13. I was trying to copy the content of a text file from in the command line with
```
cat file.txt | pbcopy
```
But the file content was not copied into the clipboard. The same for xclip. I already give the permission to windterm to override the content in clipboard. How can I get it work?

Reproduce the report on macOS 13 with `cat file.txt | pbcopy`, and compare the same behavior with `xclip`. Trace how WindTerm handles clipboard writes from terminal commands; done means the file content appears in the system clipboard for both reported cases.

Written by the indexing model from the issue text.