Tests: use code interface for Member create/update (actor propagation)

test/mv_web/live/custom_field_live/deletion_test.exs

@@ -41,7 +41,8 @@ defmodule MvWeb.CustomFieldLive.DeletionTest do
     user_with_role = Ash.load!(user, :role, domain: Mv.Accounts, actor: system_actor)
     conn = log_in_user(build_conn(), user_with_role)
     # Use English locale so "Delete" link text matches in assertions
-    conn = Plug.Test.init_test_session(conn, Map.put(conn.private.plug_session, "locale", "en"))
+    session = conn.private[:plug_session] || %{}
+    conn = Plug.Test.init_test_session(conn, Map.put(session, "locale", "en"))
     %{conn: conn, user: user_with_role}
   end
 
@@ -271,17 +272,18 @@ defmodule MvWeb.CustomFieldLive.DeletionTest do
     end
   end
 
-  # Helper functions
+  # Helper functions (use code interface so actor is in validation context)
   defp create_member do
     system_actor = Mv.Helpers.SystemActor.get_system_actor()
 
-    Member
-    |> Ash.Changeset.for_create(:create_member, %{
-      first_name: "Test",
-      last_name: "User#{System.unique_integer([:positive])}",
-      email: "test#{System.unique_integer([:positive])}@example.com"
-    })
-    |> Ash.create(actor: system_actor)
+    Mv.Membership.create_member(
+      %{
+        first_name: "Test",
+        last_name: "User#{System.unique_integer([:positive])}",
+        email: "test#{System.unique_integer([:positive])}@example.com"
+      },
+      actor: system_actor
+    )
   end
 
   defp create_custom_field(name, value_type) do