AI Implementation feature(821): First-Start Create Admin Modal (#2)

docs/index.md

@@ -40,6 +40,8 @@ they need.
   CSRF, and error envelope.
 * [Auth Endpoints](/api/auth.md) - Login, refresh, logout, CSRF, and
   first-admin registration.
+* [Setup Endpoint](/api/setup.md) - Dedicated `POST /api/v1/setup/create-admin`
+  used only while no administrator exists.
 * [Admin Endpoints](/api/admin.md) - User management endpoints
   (admin role required).
 * [System Endpoints](/api/system.md) - Bootstrap, event status, and SSE
@@ -49,7 +51,7 @@ they need.
 # Guides
 
 * [First-Run Bootstrap](/guides/bootstrap.md) - How a fresh instance is
-  initialized by the very first admin.
+  initialized by the very first admin via the non-dismissible modal.
 * [Theming](/guides/theming.md) - How themes are loaded and applied.
 * [Event Window](/guides/event-window.md) - How the event window and live
   countdown work.