Replace the SMTP 'coming soon' stub with a real card: host/port/SSL/user/password/
from-address/from-name → crm.settings.smtp.configure, masked status from
crm.settings.smtp.status. Mirrors the Twilio SMS card; demo mode stores hints locally.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
New Settings tab renders an Integrations section; the SMS (Twilio) card lets a
tenant admin connect their own Twilio account (Account SID / write-only Auth Token
/ E.164 from-number) via crm.settings.sms.configure, and shows the masked status
(from-number + SID last-4) from crm.settings.sms.status. Demo mode stores hints
locally. Email (SMTP) shown as the next provider on the same registry.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
maaz519