Replace the UsersTab and MessagingTab stubs on the Authentik service
page, built new against the Authentik directory endpoint (the old
Jellyfin-backed Users page was deleted in slice 3).
Backend message endpoint (Option A -- implemented):
- POST /api/services/authentik/{service_id}/message accepts
{recipient_emails, subject, html_body}, validates SMTP, enqueues via
the existing mail_queue. Returns {status, request_id, recipient_count}
on success or {status: 'error', error} on failure (200, matching the
directory endpoint's graceful-error pattern).
- GET /api/services/authentik/{service_id}/message/status proxies
mail_queue.status().
UsersTab: paginated (25/page), searchable directory table sourced from
GET /api/services/authentik/{id}/users. Columns: name, username, email,
status (is_active badge). Graceful error Alert on endpoint error.
MessagingTab: minimal but functional compose -- recipient search +
toggle buttons (Authentik users with emails), subject, HTML body
textarea (default template), send wired to the new endpoint, result
Alert. Rich-text toolbar, attachment upload, and queue-status banner
are follow-ups (the old compose UI had them; this slice ships the core
send flow).
New: api/authentik.ts, hooks/useAuthentik.ts (useAuthentikUsers +
useAuthentikMessageStatus), UsersTab + MessagingTab + tests. stubs.tsx
loses both stubs; index.ts wires the real components.
Tests: UsersTab (renders users + error state), MessagingTab (renders
compose form). 100 frontend tests pass (+4); 271 backend tests pass
(no regression); lint/build green both sides.
Refs openspec/changes/services-as-hub-ia/ (spec R6.2/R7.2/R7.3, tasks
slice 8).
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