fix: add actor parameter to Ash.load in LiveHelpers

Use self as actor when loading user role relationship to ensure
proper authorization and policy enforcement.

lib/mv_web/live_helpers.ex

@@ -45,7 +45,10 @@ defmodule MvWeb.LiveHelpers do
   end
 
   defp load_role_safely(user) do
-    case Ash.load(user, :role, domain: Mv.Accounts) do
+    # Use self as actor for loading own role relationship
+    opts = [domain: Mv.Accounts, actor: user]
+
+    case Ash.load(user, :role, opts) do
       {:ok, loaded_user} -> loaded_user
       {:error, _} -> user
     end