bug: `ls` strips directory path from file arguments

[chaliy]

Problem

Bashkit's ls builtin strips directory paths from arguments, returning only filenames when given full paths.

Reproduction

mkdir -p /tmp/test
echo x > /tmp/test/a.md
echo y > /tmp/test/b.md
ls -t /tmp/test/*.md

Real ls: /tmp/test/a.md\n/tmp/test/b.md
Bashkit ls: a.md\nb.md

Impact

Scripts that pass ls output to other commands (e.g., ls -t dir/*.md | xargs awk) get filenames without paths, causing "file not found" errors. Used in wedow/ticket's cmd_closed.