refactor: replace complex pipe-closure with simple then_some (#373)

https://claude.ai/code/session_01RNq8cLPfc5PEN4M8cQodwx

Co-authored-by: Claude <noreply@anthropic.com>

Author: KSXGitHub

tests/cli_errors.rs

@@ -35,7 +35,7 @@ fn stdio(command: Command) -> Command {
 #[cfg(unix)]
 fn fs_permission(path: impl AsRef<Path>, permission: &'static str, recursive: bool) {
     let Output { status, stderr, .. } = Command::new("chmod")
-        .pipe(|cmd| if recursive { cmd.with_arg("-R") } else { cmd })
+        .with_args(recursive.then_some("-R"))
         .with_arg(permission)
         .with_arg(path.as_ref())
         .with_stdin(Stdio::null())