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
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