Under an SSH remote backend the web server is launched by running the uv
BASE interpreter with the venv's site-packages injected into sys.path at
startup, so sys.executable is a dependency-less python. Detached
dashboard actions spawned from it (Update now, restart, anything routed
through _spawn_hermes_action) inherited neither the injected path nor a
PYTHONPATH and died on the first third-party import — 'Update now'
always failed instantly with ModuleNotFoundError: No module named 'yaml'
while 'hermes update' from the venv worked (#90026).
_dashboard_spawn_executable now prefers the install's own venv
interpreter (venv/bin/python, venv/Scripts/python.exe) when it differs
from sys.executable, resolving the same dependency set the venv launcher
provides. Same-interpreter launches return sys.executable unchanged,
preserving the Windows console-ownership behavior verbatim, and layouts
without an install venv keep the old fallback.
liuhao1024