pub fn open_new_window(state: &Arc<AppState>) -> Result<Value, String>Expand description
Open a new full AgentMux instance (status-bar version click, Ctrl+Shift+N,
second agentmux.exe launch). Independent top-level window, own taskbar
entry, independent lifecycle. See
docs/specs/SPEC_MULTIWINDOW_TASKBAR_GROUPING.md.