fix: exit date as default hidden column

lib/mv_web/live/member_field_live/index_component.ex

@@ -5,7 +5,7 @@ defmodule MvWeb.MemberFieldLive.IndexComponent do
   ## Features
   - List all member fields from Mv.Constants.member_fields()
   - Display show_in_overview status as badge (Yes/No)
-  - Display required status for required fields (first_name, last_name, email)
+  - Display required status based on actual attribute definitions (allow_nil? false)
   - Edit member field properties (expandable form like custom fields)
   - Updates Settings.member_field_visibility
   """
@@ -15,8 +15,6 @@ defmodule MvWeb.MemberFieldLive.IndexComponent do
   alias MvWeb.Translations.MemberFields
   alias MvWeb.Translations.FieldTypes
 
-  @required_fields [:first_name, :last_name, :email]
-
   @impl true
   def render(assigns) do
     assigns =
@@ -245,6 +243,13 @@ defmodule MvWeb.MemberFieldLive.IndexComponent do
 
   defp normalize_visibility_config(_), do: %{}
 
-  defp required?(field) when field in @required_fields, do: true
+  # Check if a field is required by checking the actual attribute definition
+  defp required?(field) when is_atom(field) do
+    case Ash.Resource.Info.attribute(Mv.Membership.Member, field) do
+      nil -> false
+      attribute -> not attribute.allow_nil?
+    end
+  end
+
   defp required?(_), do: false
 end