When the fleet page is empty or a printer is "unknown", the reason is
almost always upstream: the gateway is not connected, or discovery never
reported. A strip per farm now says which - "Gateway online/offline/
checking" (no answer yet is not offline) - with a collapsible list of the
printers discovery found, each marked already added, same address as an
added printer, or not added yet, using the backend's serial/address match.
It also says plainly when discovery has not reported at all, which is the
default, as distinct from a scan that found nothing.
Read-only on purpose: adding a printer from the UI still needs the proxy's
offline-capable store and a credential pass-through that is never kept in
the cloud. Polled every 10s (gateway presence has no push channel); a
failed poll keeps the last answer instead of flipping to offline.
Checked in real Chrome against the live stack (Gateway online, discovery
not reported, no page errors); the static SPA still generates, now 6 routes.
octoturge
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