- Banner floats at the very top (over the nav/title area), never pushing the
content below and staying clear of the list/pill.
- Offline banner now fires on refresh in airplane mode / no data: the mirror
live chain bypassed the HTTP cache (+10s timeout) so an offline fetch really
fails instead of silently re-serving a cached pointer+dump as a 'success'
(which kept dataStatus .live and hid the banner).
- Onboarding permissions fire at the Continue/Allow tap BEFORE advancing, so
the system prompt appears after the page is read and never covers the next
page's animation (grant auto-advances).