copy multiple lines in tmux

Thank you for developing such a great tool. I am using `WindTerm` v2.5 on `macos 13`. But I found in `tmux`, copying multiple lines is not working. Only the first line is copied. Additionally, the 'Automatically copy selection' does not work when using `tmux`. Is there any solution?

Reproduce the report with WindTerm v2.5 on macOS 13, using tmux to select and copy multiple lines and testing the “Automatically copy selection” setting. Start by comparing selection behavior inside and outside tmux; done means all selected lines copy correctly and automatic copying works in tmux.

Written by the indexing model from the issue text.