{# Persistent nav for dashboard pages. Caller passes ``active`` =
``'overview'`` | ``'api_keys'`` | ``'data'`` so the right tab gets the
active state. Adding a tab: drop another ``
`` here + extend the
``active`` literal in the route handlers that render the page.
T55: re-skinned to terminal-brutalist. The ``dash-nav`` class + the
"Overview" / "API keys" anchor text are part of the public contract
(asserted in tests/unit/test_dashboard_api_keys.py::
test_dashboard_nav_renders_with_correct_active_tab) — do not rename. #}