refactor: Use submit_form wrapper in all LiveView forms

- Replace AshPhoenix.Form.submit with submit_form/3 wrapper
- Import current_actor and submit_form from LiveHelpers
- Consistent actor handling in all form submissions

lib/mv_web/live/member_live/form.ex

@@ -23,7 +23,7 @@ defmodule MvWeb.MemberLive.Form do
 
   on_mount {MvWeb.LiveHelpers, :ensure_user_role_loaded}
 
-  import MvWeb.LiveHelpers, only: [current_actor: 1]
+  import MvWeb.LiveHelpers, only: [current_actor: 1, submit_form: 3]
 
   alias Mv.MembershipFees
   alias Mv.MembershipFees.MembershipFeeType
@@ -290,10 +290,7 @@ defmodule MvWeb.MemberLive.Form do
     try do
       actor = current_actor(socket)
 
-      case AshPhoenix.Form.submit(socket.assigns.form,
-             params: member_params,
-             action_opts: [actor: actor]
-           ) do
+      case submit_form(socket.assigns.form, member_params, actor) do
         {:ok, member} ->
           handle_save_success(socket, member)