How do I install Jupyterlab ?

edit

I managed to install jupyterlab by going to SageMath Shell and running: pip install jupyterlab

I can run it by going to SageMath Shell and running: jupyter lab

It launches jupyterlab in the browser....Is there a way to launch jupyterlab as an app and not in a browser ?

Also, why doesn't sage work in Windows's command line ? what should I do to make Windows's command line recognize the command sage ?

I made a batch file called sage.bat with the following content:

@ECHO OFF
"B:\SageMath 9.2\runtime\bin\bash.exe" -l "B:\SageMath 9.2\runtime\opt\sagemath-9.2\sage"

and saved it under C:\Windows\ .. now when I type sage in the Windows' command line, it works, but for some reason if you add arguments to sage, it doesn't work...what did I do wrong ?

Many Thanks