## Summary
It turns out activating the kernel does not change `VIRTUAL_ENV`, so we
still install into the environment the Jupyter environment, rather than
the project environment.
Unfortunately, after this change, we do still show a warning on `uv
add`:
```
warning: `VIRTUAL_ENV=/Users/crmarsh/.cache/uv/archive-v0/3bddKDdYXuX2w57Fu6itL` does not match the project environment path `.venv` and will be ignored
```
`uv pip install` works without warning.
Closes#11154.
Charlie Marsh
2dfeafbaa4