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

test/mv_web/live/user_live/show_test.exs

@@ -68,13 +68,10 @@ defmodule MvWeb.UserLive.ShowTest do
 
       # Create member
       {:ok, member} =
-        Member
-        |> Ash.Changeset.for_create(:create_member, %{
-          first_name: "Alice",
-          last_name: "Smith",
-          email: "alice@example.com"
-        })
-        |> Ash.create(actor: system_actor)
+        Mv.Membership.create_member(
+          %{first_name: "Alice", last_name: "Smith", email: "alice@example.com"},
+          actor: system_actor
+        )
 
       # Create user and link to member
       user = create_test_user(%{email: "user@example.com"})