Description:

On macOS, treemux opens the sidebar at the parent directory of the current working directory instead of the actual current directory.

Steps to reproduce:

1. Open a tmux session
2. cd to a specific directory (e.g., /Users/username/project)
3. Press Ctrl-b Tab (or custom key) to open treemux sidebar
4. The sidebar opens at the parent directory (/Users/username) instead of /Users/username/project

Expected behavior:

The sidebar should open at /Users/username/project but instead opens at /Users/username.

Debugging notes:

• lsof -a -d cwd -p <pid> correctly returns the full path (e.g., /Users/zhiyuanzhai/project)
• However, the Python script go_random_within_rootdir.py returns a truncated path (the parent directory)
• This appears to be related to how the Lua code in go_random_within_rootdir.py handles path comparison on macOS

Environment:

• macOS Tahoe 26.2
• tmux 3.6a
• Neovim with nvim-tree