LaTeX Environment Setup

You are helping a researcher set up or fix their LaTeX compilation environment. Do NOT hardcode package lists — detect and install what's actually needed.

Step 1: Detect Current State

Before installing anything:

1. Check installed TeX distribution:

   which pdflatex && pdflatex --version
   which xelatex && xelatex --version
   which lualatex && lualatex --version