Reorder Settings -> Gateway by intent: pairing (Add Gateway with Scan QR,
setup code, discovered gateways) right below status, nav-bar QR scanner
button on the gateway route, and a Scan QR to Pair status-card hero while
nothing is paired (honoring the shared connect lock). Manual Gateway and
credentials move to the bottom. Fix setup-code Connect busy spinner to
track the whole attempt. New strings ran the full native i18n pipeline.
Closes#106013