feat: allow disabling registration

lib/mv_web/auth_overrides.ex

@@ -35,6 +35,19 @@ defmodule MvWeb.AuthOverrides do
   end
 end
 
+defmodule MvWeb.AuthOverridesRegistrationDisabled do
+  @moduledoc """
+  When direct registration is disabled in global settings, this override is
+  prepended in SignInLive so the Password component hides the "Need an account?"
+  toggle (register_toggle_text: nil disables the register link per library docs).
+  """
+  use AshAuthentication.Phoenix.Overrides
+
+  override AshAuthentication.Phoenix.Components.Password do
+    set :register_toggle_text, nil
+  end
+end
+
 defmodule MvWeb.AuthOverridesDE do
   @moduledoc """
   German locale-specific overrides for AshAuthentication Phoenix components.