uv pip install requires a virtual environment by default. When hermes
is installed system-wide or via pipx, the setup wizard's SDK installs
(daytona, swe-rex[modal], tinker-atropos) fail with 'No virtual
environment found'. Fix by passing --python sys.executable to uv,
which targets the correct Python regardless of venv state.
Also show the actual error message on install failure so users can
debug.