feat(admin): add registration policy settings and disabled register state

TODO.md

@@ -28,7 +28,7 @@ This file is the single source of truth for roadmap and delivery progress.
 - [x] [P1] Bootstrap first-run owner account creation via initial registration flow
 - [x] [P1] Enforce invariant: exactly one owner user must always exist
 - [x] [P1] Create hidden technical support user by default (non-demotable, non-deletable)
-- [~] [P1] Admin registration policy control (allow/deny self-registration for admin panel)
+- [x] [P1] Admin registration policy control (allow/deny self-registration for admin panel)
 - [x] [P1] First-start onboarding route for initial owner creation (`/welcome`)
 - [x] [P1] Split auth entry points (`/welcome`, `/login`, `/register`) with cross-links
 - [~] [P2] Support fallback sign-in route (`/support/:key`) as break-glass access
@@ -45,7 +45,7 @@ This file is the single source of truth for roadmap and delivery progress.
 - [x] [P1] Authentication and session model (`admin`, `editor`, `manager`)
 - [x] [P1] Protected admin routes and session handling
 - [~] [P1] Temporary admin posts CRUD sandbox for baseline functional validation
-- [ ] [P1] Core admin IA (pages/media/users/commissions/settings)
+- [~] [P1] Core admin IA (pages/media/users/commissions/settings)
 
 ### Public App
 
@@ -198,6 +198,7 @@ This file is the single source of truth for roadmap and delivery progress.
 - [2026-02-10] Shared CRUD base (`@cms/crud`) is live with validation, not-found errors, and audit hook contracts; only posts are migrated so far.
 - [2026-02-10] Admin dashboard includes a temporary posts CRUD sandbox (create/update/delete) to validate the shared CRUD base through the real app UI.
 - [2026-02-10] Admin i18n baseline now resolves locale from cookie and loads runtime message dictionaries in root layout; admin locale switcher is active on auth and dashboard views.
+- [2026-02-10] Admin self-registration policy is now managed via `/settings` and persisted in `system_setting`; env var is fallback/default only.
 
 ## How We Use This File
 

apps/admin/src/app/login/login-form.tsx

@@ -8,7 +8,7 @@ import { AdminLocaleSwitcher } from "@/components/admin-locale-switcher"
 import { useAdminT } from "@/providers/admin-i18n-provider"
 
 type LoginFormProps = {
-  mode: "signin" | "signup-owner" | "signup-user"
+  mode: "signin" | "signup-owner" | "signup-user" | "signup-disabled"
 }
 
 type AuthResponse = {
@@ -41,6 +41,7 @@ export function LoginForm({ mode }: LoginFormProps) {
   const [isBusy, setIsBusy] = useState(false)
   const [error, setError] = useState<string | null>(null)
   const [success, setSuccess] = useState<string | null>(null)
+  const canSubmitSignUp = mode === "signup-owner" || mode === "signup-user"
 
   async function handleSignIn(event: FormEvent<HTMLFormElement>) {
     event.preventDefault()
@@ -141,7 +142,9 @@ export function LoginForm({ mode }: LoginFormProps) {
             ? t("auth.titles.signIn", "Sign in to CMS Admin")
             : mode === "signup-owner"
               ? t("auth.titles.signUpOwner", "Welcome to CMS Admin")
-              : t("auth.titles.signUpUser", "Create an admin account")}
+              : mode === "signup-user"
+                ? t("auth.titles.signUpUser", "Create an admin account")
+                : t("auth.titles.signUpDisabled", "Registration is disabled")}
         </h1>
         <p className="text-sm text-neutral-600">
           {mode === "signin"
@@ -151,7 +154,12 @@ export function LoginForm({ mode }: LoginFormProps) {
                   "auth.descriptions.signUpOwner",
                   "Create the first owner account to initialize this admin instance.",
                 )
-              : t("auth.descriptions.signUpUser", "Self-registration is enabled for admin users.")}
+              : mode === "signup-user"
+                ? t("auth.descriptions.signUpUser", "Self-registration is enabled for admin users.")
+                : t(
+                    "auth.descriptions.signUpDisabled",
+                    "Self-registration is currently turned off by an administrator.",
+                  )}
         </p>
       </div>
 
@@ -208,7 +216,7 @@ export function LoginForm({ mode }: LoginFormProps) {
 
           {error ? <p className="text-sm text-red-600">{error}</p> : null}
         </form>
-      ) : (
+      ) : canSubmitSignUp ? (
         <form
           onSubmit={handleSignUp}
           className="mt-8 space-y-4 rounded-xl border border-neutral-200 p-6"
@@ -290,6 +298,20 @@ export function LoginForm({ mode }: LoginFormProps) {
           {error ? <p className="text-sm text-red-600">{error}</p> : null}
           {success ? <p className="text-sm text-green-700">{success}</p> : null}
         </form>
+      ) : (
+        <section className="mt-8 space-y-4 rounded-xl border border-neutral-200 p-6">
+          <p className="text-sm text-neutral-700">
+            {t(
+              "auth.messages.registrationDisabled",
+              "Registration is disabled for this admin instance. Ask an administrator to create an account or enable self-registration.",
+            )}
+          </p>
+          <p className="text-xs text-neutral-600">
+            <Link href={`/login?next=${encodeURIComponent(nextPath)}`} className="underline">
+              {t("auth.links.goToSignIn", "Go to sign in")}
+            </Link>
+          </p>
+        </section>
       )}
     </main>
   )

apps/admin/src/app/page.tsx

@@ -200,6 +200,12 @@ export default async function AdminHomePage({
           >
             {t("dashboard.actions.openRoadmap", "Open roadmap and progress")}
           </Link>
+          <Link
+            href="/settings"
+            className="inline-flex rounded-md border border-neutral-300 px-4 py-2 text-sm font-medium hover:bg-neutral-100"
+          >
+            {t("settings.title", "Settings")}
+          </Link>
           <LogoutButton />
         </div>
       </header>

apps/admin/src/app/register/page.tsx

@@ -33,7 +33,7 @@ export default async function RegisterPage({ searchParams }: { searchParams: Sea
   const enabled = await isSelfRegistrationEnabled()
 
   if (!enabled) {
-    redirect(`/login?next=${encodeURIComponent(nextPath)}`)
+    return <LoginForm mode="signup-disabled" />
   }
 
   return <LoginForm mode="signup-user" />

apps/admin/src/app/settings/page.tsx

@@ -0,0 +1,188 @@
+import { hasPermission } from "@cms/content/rbac"
+import { isAdminSelfRegistrationEnabled, setAdminSelfRegistrationEnabled } from "@cms/db"
+import { Button } from "@cms/ui/button"
+import { revalidatePath } from "next/cache"
+import Link from "next/link"
+import { redirect } from "next/navigation"
+
+import { AdminLocaleSwitcher } from "@/components/admin-locale-switcher"
+import { translateMessage } from "@/i18n/messages"
+import { getAdminMessages, resolveAdminLocale } from "@/i18n/server"
+import { resolveRoleFromServerContext } from "@/lib/access-server"
+
+type SearchParamsInput = Promise<Record<string, string | string[] | undefined>>
+
+function toSingleValue(input: string | string[] | undefined): string | null {
+  if (Array.isArray(input)) {
+    return input[0] ?? null
+  }
+
+  return input ?? null
+}
+
+async function requireSettingsPermission() {
+  const role = await resolveRoleFromServerContext()
+
+  if (!role) {
+    redirect("/login?next=/settings")
+  }
+
+  if (!hasPermission(role, "users:manage_roles", "global")) {
+    redirect("/unauthorized?required=users:manage_roles&scope=global")
+  }
+}
+
+async function getSettingsTranslator() {
+  const locale = await resolveAdminLocale()
+  const messages = await getAdminMessages(locale)
+
+  return (key: string, fallback: string) => translateMessage(messages, key, fallback)
+}
+
+async function updateRegistrationPolicyAction(formData: FormData) {
+  "use server"
+
+  await requireSettingsPermission()
+  const t = await getSettingsTranslator()
+  const enabled = formData.get("enabled") === "on"
+
+  try {
+    await setAdminSelfRegistrationEnabled(enabled)
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : ""
+    const normalizedMessage = errorMessage.toLowerCase()
+    const isDatabaseUnavailable = errorMessage.includes("P1001")
+    const isSchemaMissing =
+      errorMessage.includes("P2021") ||
+      normalizedMessage.includes("system_setting") ||
+      normalizedMessage.includes("does not exist")
+
+    const userMessage = isDatabaseUnavailable
+      ? t(
+          "settings.registration.errors.databaseUnavailable",
+          "Saving settings failed. The database is currently unreachable.",
+        )
+      : isSchemaMissing
+        ? t(
+            "settings.registration.errors.schemaMissing",
+            "Saving settings failed. Apply the latest database migrations and try again.",
+          )
+        : t(
+            "settings.registration.errors.updateFailed",
+            "Saving settings failed. Ensure database migrations are applied.",
+          )
+
+    redirect(`/settings?error=${encodeURIComponent(userMessage)}`)
+  }
+
+  revalidatePath("/settings")
+  revalidatePath("/register")
+  redirect(
+    `/settings?notice=${encodeURIComponent(
+      t("settings.registration.success.updated", "Registration policy updated."),
+    )}`,
+  )
+}
+
+export default async function SettingsPage({ searchParams }: { searchParams: SearchParamsInput }) {
+  await requireSettingsPermission()
+
+  const [params, locale, isRegistrationEnabled] = await Promise.all([
+    searchParams,
+    resolveAdminLocale(),
+    isAdminSelfRegistrationEnabled(),
+  ])
+  const messages = await getAdminMessages(locale)
+  const t = (key: string, fallback: string) => translateMessage(messages, key, fallback)
+
+  const notice = toSingleValue(params.notice)
+  const error = toSingleValue(params.error)
+
+  return (
+    <main className="mx-auto flex min-h-screen w-full max-w-4xl flex-col gap-8 px-6 py-16">
+      <header className="space-y-3">
+        <div className="flex items-center justify-between gap-3">
+          <p className="text-sm uppercase tracking-[0.2em] text-neutral-500">
+            {t("settings.badge", "Admin Settings")}
+          </p>
+          <AdminLocaleSwitcher />
+        </div>
+        <h1 className="text-4xl font-semibold tracking-tight">{t("settings.title", "Settings")}</h1>
+        <p className="text-neutral-600">
+          {t(
+            "settings.description",
+            "Manage runtime policies for the admin authentication and onboarding flow.",
+          )}
+        </p>
+        <div className="flex items-center gap-3 pt-2">
+          <Link
+            href="/"
+            className="inline-flex rounded-md border border-neutral-300 px-4 py-2 text-sm font-medium hover:bg-neutral-100"
+          >
+            {t("settings.actions.backToDashboard", "Back to dashboard")}
+          </Link>
+        </div>
+      </header>
+
+      {notice ? (
+        <section className="rounded-xl border border-emerald-300 bg-emerald-50 px-4 py-3 text-sm text-emerald-800">
+          {notice}
+        </section>
+      ) : null}
+
+      {error ? (
+        <section className="rounded-xl border border-red-300 bg-red-50 px-4 py-3 text-sm text-red-800">
+          {error}
+        </section>
+      ) : null}
+
+      <section className="rounded-xl border border-neutral-200 p-6">
+        <div className="space-y-5">
+          <div className="space-y-2">
+            <h2 className="text-xl font-medium">
+              {t("settings.registration.title", "Admin self-registration")}
+            </h2>
+            <p className="text-sm text-neutral-600">
+              {t(
+                "settings.registration.description",
+                "When enabled, /register can create additional admin accounts after initial owner bootstrap.",
+              )}
+            </p>
+          </div>
+
+          <div className="rounded-lg border border-neutral-200 p-4 text-sm text-neutral-700">
+            <p>
+              {t("settings.registration.currentStatusLabel", "Current status")}:{" "}
+              <strong>
+                {isRegistrationEnabled
+                  ? t("settings.registration.status.enabled", "Enabled")
+                  : t("settings.registration.status.disabled", "Disabled")}
+              </strong>
+            </p>
+          </div>
+
+          <form action={updateRegistrationPolicyAction} className="space-y-4">
+            <label className="flex items-center gap-3 text-sm">
+              <input
+                type="checkbox"
+                name="enabled"
+                defaultChecked={isRegistrationEnabled}
+                className="h-4 w-4 rounded border-neutral-300"
+              />
+              <span>
+                {t(
+                  "settings.registration.checkboxLabel",
+                  "Allow self-registration on /register for admin users",
+                )}
+              </span>
+            </label>
+
+            <Button type="submit">
+              {t("settings.registration.actions.save", "Save registration policy")}
+            </Button>
+          </form>
+        </div>
+      </section>
+    </main>
+  )
+}

apps/admin/src/i18n/messages.test.ts

@@ -19,11 +19,13 @@ const messages: AdminMessages = {
       signIn: "Sign in",
       signUpOwner: "Welcome",
       signUpUser: "Create account",
+      signUpDisabled: "Registration disabled",
     },
     descriptions: {
       signIn: "Sign in description",
       signUpOwner: "Owner description",
       signUpUser: "User description",
+      signUpDisabled: "Disabled description",
     },
     fields: {
       name: "Name",
@@ -48,6 +50,7 @@ const messages: AdminMessages = {
     messages: {
       ownerCreated: "Owner account created.",
       accountCreated: "Account created.",
+      registrationDisabled: "Registration is disabled.",
     },
     errors: {
       nameRequired: "Name is required.",
@@ -57,6 +60,33 @@ const messages: AdminMessages = {
       networkSignUp: "Network sign up error",
     },
   },
+  settings: {
+    badge: "Admin Settings",
+    title: "Settings",
+    description: "Settings description",
+    actions: {
+      backToDashboard: "Back to dashboard",
+    },
+    registration: {
+      title: "Registration",
+      description: "Registration description",
+      currentStatusLabel: "Current status",
+      status: {
+        enabled: "Enabled",
+        disabled: "Disabled",
+      },
+      checkboxLabel: "Allow registration",
+      actions: {
+        save: "Save",
+      },
+      success: {
+        updated: "Updated",
+      },
+      errors: {
+        updateFailed: "Update failed",
+      },
+    },
+  },
   dashboard: {
     badge: "Admin App",
     title: "Content Dashboard",

apps/admin/src/lib/access.ts

@@ -43,6 +43,13 @@ const guardRules: GuardRule[] = [
       scope: "global",
     },
   },
+  {
+    route: /^\/settings(?:\/|$)/,
+    requirement: {
+      permission: "users:manage_roles",
+      scope: "global",
+    },
+  },
   {
     route: /^\/(?:$|\?)/,
     requirement: {

apps/admin/src/lib/auth/server.ts

@@ -1,5 +1,5 @@
 import { normalizeRole, type Role } from "@cms/content/rbac"
-import { db } from "@cms/db"
+import { db, isAdminSelfRegistrationEnabled } from "@cms/db"
 import { betterAuth } from "better-auth"
 import { prismaAdapter } from "better-auth/adapters/prisma"
 import { toNextJsHandler } from "better-auth/next-js"
@@ -43,8 +43,7 @@ export async function isInitialOwnerRegistrationOpen(): Promise<boolean> {
 }
 
 export async function isSelfRegistrationEnabled(): Promise<boolean> {
-  // Temporary fallback until registration policy is managed from admin settings.
-  return process.env.CMS_ADMIN_SELF_REGISTRATION_ENABLED === "true"
+  return isAdminSelfRegistrationEnabled()
 }
 
 export async function canUserSelfRegister(): Promise<boolean> {

apps/admin/src/messages/de.json

@@ -13,12 +13,14 @@
     "titles": {
       "signIn": "Bei CMS Admin anmelden",
       "signUpOwner": "Willkommen bei CMS Admin",
-      "signUpUser": "Admin-Konto erstellen"
+      "signUpUser": "Admin-Konto erstellen",
+      "signUpDisabled": "Registrierung ist deaktiviert"
     },
     "descriptions": {
       "signIn": "Better Auth ist in dieser App über /api/auth aktiv.",
       "signUpOwner": "Erstelle das erste Owner-Konto, um diese Admin-Instanz zu initialisieren.",
-      "signUpUser": "Selbstregistrierung für Admin-Benutzer ist aktiviert."
+      "signUpUser": "Selbstregistrierung für Admin-Benutzer ist aktiviert.",
+      "signUpDisabled": "Selbstregistrierung wurde von einer Administratorin oder einem Administrator deaktiviert."
     },
     "fields": {
       "name": "Name",
@@ -42,7 +44,8 @@
     },
     "messages": {
       "ownerCreated": "Owner-Konto erstellt. Registrierung ist jetzt deaktiviert.",
-      "accountCreated": "Konto erstellt."
+      "accountCreated": "Konto erstellt.",
+      "registrationDisabled": "Für diese Admin-Instanz ist die Registrierung deaktiviert. Bitte wende dich an eine Administratorin oder einen Administrator."
     },
     "errors": {
       "nameRequired": "Name ist für die Kontoerstellung erforderlich",
@@ -52,6 +55,33 @@
       "networkSignUp": "Netzwerkfehler bei der Registrierung"
     }
   },
+  "settings": {
+    "badge": "Admin-Einstellungen",
+    "title": "Einstellungen",
+    "description": "Verwalte Laufzeitrichtlinien für Authentifizierung und Onboarding im Admin-Bereich.",
+    "actions": {
+      "backToDashboard": "Zurück zum Dashboard"
+    },
+    "registration": {
+      "title": "Admin-Selbstregistrierung",
+      "description": "Wenn aktiviert, können über /register nach der initialen Owner-Erstellung weitere Admin-Konten erstellt werden.",
+      "currentStatusLabel": "Aktueller Status",
+      "status": {
+        "enabled": "Aktiviert",
+        "disabled": "Deaktiviert"
+      },
+      "checkboxLabel": "Selbstregistrierung auf /register für Admin-Benutzer erlauben",
+      "actions": {
+        "save": "Registrierungsrichtlinie speichern"
+      },
+      "success": {
+        "updated": "Registrierungsrichtlinie aktualisiert."
+      },
+      "errors": {
+        "updateFailed": "Speichern der Einstellungen fehlgeschlagen. Stelle sicher, dass Datenbankmigrationen angewendet wurden."
+      }
+    }
+  },
   "dashboard": {
     "badge": "Admin-App",
     "title": "Content-Dashboard",

apps/admin/src/messages/en.json

@@ -13,12 +13,14 @@
     "titles": {
       "signIn": "Sign in to CMS Admin",
       "signUpOwner": "Welcome to CMS Admin",
-      "signUpUser": "Create an admin account"
+      "signUpUser": "Create an admin account",
+      "signUpDisabled": "Registration is disabled"
     },
     "descriptions": {
       "signIn": "Better Auth is active on this app via /api/auth.",
       "signUpOwner": "Create the first owner account to initialize this admin instance.",
-      "signUpUser": "Self-registration is enabled for admin users."
+      "signUpUser": "Self-registration is enabled for admin users.",
+      "signUpDisabled": "Self-registration is currently turned off by an administrator."
     },
     "fields": {
       "name": "Name",
@@ -42,7 +44,8 @@
     },
     "messages": {
       "ownerCreated": "Owner account created. Registration is now disabled.",
-      "accountCreated": "Account created."
+      "accountCreated": "Account created.",
+      "registrationDisabled": "Registration is disabled for this admin instance. Ask an administrator to create an account or enable self-registration."
     },
     "errors": {
       "nameRequired": "Name is required for account creation",
@@ -52,6 +55,33 @@
       "networkSignUp": "Network error while signing up"
     }
   },
+  "settings": {
+    "badge": "Admin Settings",
+    "title": "Settings",
+    "description": "Manage runtime policies for the admin authentication and onboarding flow.",
+    "actions": {
+      "backToDashboard": "Back to dashboard"
+    },
+    "registration": {
+      "title": "Admin self-registration",
+      "description": "When enabled, /register can create additional admin accounts after initial owner bootstrap.",
+      "currentStatusLabel": "Current status",
+      "status": {
+        "enabled": "Enabled",
+        "disabled": "Disabled"
+      },
+      "checkboxLabel": "Allow self-registration on /register for admin users",
+      "actions": {
+        "save": "Save registration policy"
+      },
+      "success": {
+        "updated": "Registration policy updated."
+      },
+      "errors": {
+        "updateFailed": "Saving settings failed. Ensure database migrations are applied."
+      }
+    }
+  },
   "dashboard": {
     "badge": "Admin App",
     "title": "Content Dashboard",

apps/admin/src/messages/es.json

@@ -13,12 +13,14 @@
     "titles": {
       "signIn": "Iniciar sesión en CMS Admin",
       "signUpOwner": "Bienvenido a CMS Admin",
-      "signUpUser": "Crear una cuenta de admin"
+      "signUpUser": "Crear una cuenta de admin",
+      "signUpDisabled": "El registro está deshabilitado"
     },
     "descriptions": {
       "signIn": "Better Auth está activo en esta app mediante /api/auth.",
       "signUpOwner": "Crea la primera cuenta owner para inicializar esta instancia de administración.",
-      "signUpUser": "El registro automático está habilitado para usuarios admin."
+      "signUpUser": "El registro automático está habilitado para usuarios admin.",
+      "signUpDisabled": "El auto-registro está desactivado actualmente por un administrador."
     },
     "fields": {
       "name": "Nombre",
@@ -42,7 +44,8 @@
     },
     "messages": {
       "ownerCreated": "Cuenta owner creada. El registro ahora está deshabilitado.",
-      "accountCreated": "Cuenta creada."
+      "accountCreated": "Cuenta creada.",
+      "registrationDisabled": "El registro está deshabilitado para esta instancia de administración. Pide a un administrador que cree una cuenta o habilite el auto-registro."
     },
     "errors": {
       "nameRequired": "El nombre es obligatorio para crear la cuenta",
@@ -52,6 +55,33 @@
       "networkSignUp": "Error de red al registrarse"
     }
   },
+  "settings": {
+    "badge": "Ajustes de Admin",
+    "title": "Ajustes",
+    "description": "Gestiona políticas de ejecución para autenticación y onboarding del panel admin.",
+    "actions": {
+      "backToDashboard": "Volver al panel"
+    },
+    "registration": {
+      "title": "Auto-registro de admin",
+      "description": "Cuando está habilitado, /register puede crear cuentas admin adicionales después del bootstrap inicial del owner.",
+      "currentStatusLabel": "Estado actual",
+      "status": {
+        "enabled": "Habilitado",
+        "disabled": "Deshabilitado"
+      },
+      "checkboxLabel": "Permitir auto-registro en /register para usuarios admin",
+      "actions": {
+        "save": "Guardar política de registro"
+      },
+      "success": {
+        "updated": "Política de registro actualizada."
+      },
+      "errors": {
+        "updateFailed": "No se pudieron guardar los ajustes. Asegúrate de que las migraciones de base de datos estén aplicadas."
+      }
+    }
+  },
   "dashboard": {
     "badge": "App Admin",
     "title": "Panel de Contenido",

apps/admin/src/messages/fr.json

@@ -13,12 +13,14 @@
     "titles": {
       "signIn": "Se connecter à CMS Admin",
       "signUpOwner": "Bienvenue sur CMS Admin",
-      "signUpUser": "Créer un compte admin"
+      "signUpUser": "Créer un compte admin",
+      "signUpDisabled": "L’inscription est désactivée"
     },
     "descriptions": {
       "signIn": "Better Auth est actif sur cette application via /api/auth.",
       "signUpOwner": "Créez le premier compte owner pour initialiser cette instance d’administration.",
-      "signUpUser": "L’auto-inscription est activée pour les utilisateurs admin."
+      "signUpUser": "L’auto-inscription est activée pour les utilisateurs admin.",
+      "signUpDisabled": "L’auto-inscription est actuellement désactivée par un administrateur."
     },
     "fields": {
       "name": "Nom",
@@ -42,7 +44,8 @@
     },
     "messages": {
       "ownerCreated": "Compte owner créé. L’inscription est maintenant désactivée.",
-      "accountCreated": "Compte créé."
+      "accountCreated": "Compte créé.",
+      "registrationDisabled": "L’inscription est désactivée pour cette instance admin. Demandez à un administrateur de créer un compte ou de réactiver l’auto-inscription."
     },
     "errors": {
       "nameRequired": "Le nom est requis pour créer un compte",
@@ -52,6 +55,33 @@
       "networkSignUp": "Erreur réseau lors de l’inscription"
     }
   },
+  "settings": {
+    "badge": "Paramètres Admin",
+    "title": "Paramètres",
+    "description": "Gérez les politiques d’exécution pour l’authentification et l’onboarding de l’admin.",
+    "actions": {
+      "backToDashboard": "Retour au tableau de bord"
+    },
+    "registration": {
+      "title": "Auto-inscription admin",
+      "description": "Lorsqu’elle est activée, /register peut créer des comptes admin supplémentaires après l’initialisation du premier owner.",
+      "currentStatusLabel": "Statut actuel",
+      "status": {
+        "enabled": "Activé",
+        "disabled": "Désactivé"
+      },
+      "checkboxLabel": "Autoriser l’auto-inscription sur /register pour les utilisateurs admin",
+      "actions": {
+        "save": "Enregistrer la politique d’inscription"
+      },
+      "success": {
+        "updated": "Politique d’inscription mise à jour."
+      },
+      "errors": {
+        "updateFailed": "Échec de l’enregistrement des paramètres. Vérifiez que les migrations de base de données sont appliquées."
+      }
+    }
+  },
   "dashboard": {
     "badge": "Application Admin",
     "title": "Tableau de bord contenu",

docs/product-engineering/auth-baseline.md

@@ -39,6 +39,7 @@ Optional:
 
 - Support user bootstrap is available via `bun run auth:seed:support`.
 - Root `bun run db:seed` runs DB seed and support-user seed.
-- `CMS_ADMIN_SELF_REGISTRATION_ENABLED` is temporary until admin settings UI manages this policy.
+- `CMS_ADMIN_SELF_REGISTRATION_ENABLED` is now a fallback/default only.
+- Runtime source of truth is admin settings (`/settings`) backed by `system_setting`.
 - Owner/support checks for future admin user-management mutations remain tracked in `TODO.md`.
 - Email verification and forgot/reset password pipelines are tracked for MVP2.

packages/db/prisma/migrations/20260210200148_admin_registration_policy_setting/migration.sql

@@ -0,0 +1,9 @@
+-- CreateTable
+CREATE TABLE "system_setting" (
+    "key" TEXT NOT NULL,
+    "value" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "system_setting_pkey" PRIMARY KEY ("key")
+);

packages/db/prisma/schema.prisma

@@ -87,3 +87,12 @@ model Verification {
   @@index([identifier])
   @@map("verification")
 }
+
+model SystemSetting {
+  key       String   @id
+  value     String
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@map("system_setting")
+}

packages/db/src/index.ts

@@ -7,3 +7,4 @@ export {
   registerPostCrudAuditHook,
   updatePost,
 } from "./posts"
+export { isAdminSelfRegistrationEnabled, setAdminSelfRegistrationEnabled } from "./settings"

packages/db/src/settings.ts

@@ -0,0 +1,56 @@
+import { db } from "./client"
+
+const ADMIN_SELF_REGISTRATION_KEY = "admin.self_registration_enabled"
+
+function resolveEnvFallback(): boolean {
+  return process.env.CMS_ADMIN_SELF_REGISTRATION_ENABLED === "true"
+}
+
+function parseStoredBoolean(value: string): boolean | null {
+  if (value === "true") {
+    return true
+  }
+
+  if (value === "false") {
+    return false
+  }
+
+  return null
+}
+
+export async function isAdminSelfRegistrationEnabled(): Promise<boolean> {
+  try {
+    const setting = await db.systemSetting.findUnique({
+      where: { key: ADMIN_SELF_REGISTRATION_KEY },
+      select: { value: true },
+    })
+
+    if (!setting) {
+      return resolveEnvFallback()
+    }
+
+    const parsed = parseStoredBoolean(setting.value)
+
+    if (parsed === null) {
+      return resolveEnvFallback()
+    }
+
+    return parsed
+  } catch {
+    // Fallback while migrations are not yet applied in a local environment.
+    return resolveEnvFallback()
+  }
+}
+
+export async function setAdminSelfRegistrationEnabled(enabled: boolean): Promise<void> {
+  await db.systemSetting.upsert({
+    where: { key: ADMIN_SELF_REGISTRATION_KEY },
+    create: {
+      key: ADMIN_SELF_REGISTRATION_KEY,
+      value: enabled ? "true" : "false",
+    },
+    update: {
+      value: enabled ? "true" : "false",
+    },
+  })
+}

packages/ui/src/components/button.tsx

@@ -8,7 +8,7 @@ const buttonVariants = cva(
   {
     variants: {
       variant: {
-        default: "bg-neutral-900 text-neutral-50 hover:bg-neutral-800",
+        default: "bg-neutral-900 text-white hover:bg-neutral-800",
         secondary: "bg-neutral-100 text-neutral-900 hover:bg-neutral-200",
         ghost: "hover:bg-neutral-100 hover:text-neutral-900",
       },