feat: allow disabling registration

test/mv_web/controllers/auth_controller_test.exs

@@ -4,6 +4,8 @@ defmodule MvWeb.AuthControllerTest do
   import Phoenix.ConnTest
   import ExUnit.CaptureLog
 
+  alias Mv.Membership
+
   # Helper to create an unauthenticated conn (preserves sandbox metadata)
   defp build_unauthenticated_conn(authenticated_conn) do
     # Create new conn but preserve sandbox metadata for database access
@@ -169,6 +171,23 @@ defmodule MvWeb.AuthControllerTest do
     assert html =~ "length must be greater than or equal to 8"
   end
 
+  test "when registration is disabled, sign-in page does not show Need an account? toggle", %{
+    conn: authenticated_conn
+  } do
+    {:ok, settings} = Membership.get_settings()
+    original = Map.get(settings, :registration_enabled, true)
+    {:ok, _} = Membership.update_settings(settings, %{registration_enabled: false})
+
+    try do
+      conn = build_unauthenticated_conn(authenticated_conn)
+      {:ok, _view, html} = live(conn, ~p"/sign-in")
+      refute html =~ "Need an account?"
+    after
+      {:ok, s} = Membership.get_settings()
+      Membership.update_settings(s, %{registration_enabled: original})
+    end
+  end
+
   # Access control
   test "unauthenticated user accessing protected route gets redirected to sign-in", %{
     conn: authenticated_conn