rega measured dashboard-plus-grid's own leaf at 390px: the page carried
"mobile": "desktop-only" in its profile-config, and the dashboard, the grid
and a MapLibre canvas mounted anyway. The rule lived in ProfileLoader, and
this composite defines its element without ProfileLoader (it bakes its
children in), so nothing on that page read the flag.
- library/composables/useScreenGate.js holds the rule (narrow screen, not
inside the Gallery, dismissed for the session); ProfileLoader uses it,
unchanged in behaviour.
- dashboard-plus-grid calls it: on a narrow screen the desktop-only message
replaces the element, and the dashboard and grid never mount.
- check:mobile-gating (g): every flagged profile's element must mount
through ProfileLoader (an import in its index.js, not a mention in a
comment) or call useScreenGate itself. The pre-fix composite fails it.
