Each card below is one service: what it gives Jarvis, the exact steps to get the credential, and the
fields to paste it into. Pressing Save & test writes the values into
.env (or data/settings.json for anything the Settings page owns) and then
calls the service to check it works — so “connected” means the service answered, not that a box
is filled in. Stored values are never shown again; a field that already has one says
saved.