Adds branded HTML layout matching the admin portal purple palette, updates 000066 seeds, and adds 000067 migration to refresh existing template rows. Co-authored-by: Cursor <cursoragent@cursor.com>
Adds CRUD and preview APIs, RBAC permissions, seeded system templates, and migrates OTP email/SMS to template rendering. Co-authored-by: Cursor <cursoragent@cursor.com>