Add a new Settings → Secrets Manager section (available on all plans) for securely storing credentials and secrets used by external integrations. Secrets are organized into groups of name–value fields, with optional value hiding, auto-generated unique system names, and one-click copy of the ready-to-use {{secretsmanager.}} tag. Type templates (Slack, Telegram, WhatsApp, Custom, etc.) pre-fill common field sets. Each group defines an Agent Access level (Allowed, With Confirmation, Restricted) controlling how AI agents may use its values, and the section integrates with admin roles through granular View/Create/Edit/Delete permissions.