Default tasks need a root folder

[quachpas]

8e07495#diff-814ee435ae0ab927e5a5d4aed8aac1357b68fa2ad53808c53800b1d46e2244c4R10

The tasks probably need a default root, i.e. $ZED_WORKTREE_ROOT.

[WeetHet]

I personally don't think they do. A lot of (my personal) typst usage is with single-file projects, which are not affected. You can always add tasks locally, so trying to guess which root works would probably only worsen the UX