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

lib/mv_web/live/member_live/index.html.heex

@@ -257,6 +257,24 @@
     >
       {MvWeb.MemberLive.Index.format_date(member.join_date)}
     </:col>
+    <:col
+      :let={member}
+      :if={:exit_date in @member_fields_visible}
+      label={
+        ~H"""
+        <.live_component
+          module={MvWeb.Components.SortHeaderComponent}
+          id={:sort_exit_date}
+          field={:exit_date}
+          label={gettext("Exit Date")}
+          sort_field={@sort_field}
+          sort_order={@sort_order}
+        />
+        """
+      }
+    >
+      {MvWeb.MemberLive.Index.format_date(member.exit_date)}
+    </:col>
     <:col
       :let={member}
       label={gettext("Membership Fee Status")}

lib/mv_web/live/member_live/index/field_visibility.ex

@@ -183,7 +183,9 @@ defmodule MvWeb.MemberLive.Index.FieldVisibility do
 
     Enum.reduce(member_fields, %{}, fn field, acc ->
       field_string = Atom.to_string(field)
-      show_in_overview = Map.get(visibility_config, field, true)
+      # exit_date defaults to false (hidden), all other fields default to true
+      default_visibility = if field == :exit_date, do: false, else: true
+      show_in_overview = Map.get(visibility_config, field, default_visibility)
       Map.put(acc, field_string, show_in_overview)
     end)
   end