`/learn` operates on absolute paths relative to host OS's root directory

[JasonWeill]

Description

When running the /learn command, users can provide an absolute path relative to the host operating system's root directory. For example, on macOS, the path /Users/jsmith/foo/bar is valid, even if JupyterLab is running under /Users/jsmith/foo, in which case only /bar would be used by most of JupyterLab.

Expected behavior

For consistency with the terminal and the file browser, Jupyter AI should regard / as the server's root, not the root of the host OS's file system.

Context

• Operating System and version: macOS 13.6.6
• Browser and version: Firefox ESR 124.0.1
• JupyterLab version: 4.1.5
• Jupyter AI version: tip of main (2.13.0)

[krassowski]

Is there a way to disable /learn from a traitlet?