Use current_actor/1 helper in all LiveViews

Replace inconsistent actor access patterns with current_actor/1 helper
and ensure actor is passed to all Ash operations for proper authorization.

lib/mv_web/live/user_live/form.ex

@@ -33,6 +33,9 @@ defmodule MvWeb.UserLive.Form do
   """
   use MvWeb, :live_view
 
+  on_mount {MvWeb.LiveHelpers, :ensure_user_role_loaded}
+  import MvWeb.LiveHelpers, only: [current_actor: 1]
+
   @impl true
   def render(assigns) do
     ~H"""
@@ -258,10 +261,12 @@ defmodule MvWeb.UserLive.Form do
 
   @impl true
   def mount(params, _session, socket) do
+    actor = current_actor(socket)
+
     user =
       case params["id"] do
         nil -> nil
-        id -> Ash.get!(Mv.Accounts.User, id, domain: Mv.Accounts, load: [:member])
+        id -> Ash.get!(Mv.Accounts.User, id, domain: Mv.Accounts, load: [:member], actor: actor)
       end
 
     action = if is_nil(user), do: gettext("New"), else: gettext("Edit")
@@ -307,7 +312,7 @@ defmodule MvWeb.UserLive.Form do
     socket =
       if Map.has_key?(user_params, "email") do
         user_email = user_params["email"]
-        members = load_members_for_linking(user_email, socket.assigns.member_search_query)
+        members = load_members_for_linking(user_email, socket.assigns.member_search_query, socket)
 
         assign(socket, form: validated_form, available_members: members)
       else
@@ -318,19 +323,27 @@ defmodule MvWeb.UserLive.Form do
   end
 
   def handle_event("save", %{"user" => user_params}, socket) do
+    actor = current_actor(socket)
     # First save the user without member changes
-    case AshPhoenix.Form.submit(socket.assigns.form, params: user_params) do
+    case AshPhoenix.Form.submit(socket.assigns.form,
+           params: user_params,
+           action_opts: [actor: actor]
+         ) do
       {:ok, user} ->
         # Then handle member linking/unlinking as a separate step
+        actor = current_actor(socket)
+
         result =
           cond do
             # Selected member ID takes precedence (new link)
             socket.assigns.selected_member_id ->
-              Mv.Accounts.update_user(user, %{member: %{id: socket.assigns.selected_member_id}})
+              Mv.Accounts.update_user(user, %{member: %{id: socket.assigns.selected_member_id}},
+                actor: actor
+              )
 
             # Unlink flag is set
             socket.assigns[:unlink_member] ->
-              Mv.Accounts.update_user(user, %{member: nil})
+              Mv.Accounts.update_user(user, %{member: nil}, actor: actor)
 
             # No changes to member relationship
             true ->
@@ -497,18 +510,21 @@ defmodule MvWeb.UserLive.Form do
 
   @spec assign_form(Phoenix.LiveView.Socket.t()) :: Phoenix.LiveView.Socket.t()
   defp assign_form(%{assigns: %{user: user, show_password_fields: show_password_fields}} = socket) do
+    actor = current_actor(socket)
+
     form =
       if user do
         # For existing users, use admin password action if password fields are shown
         action = if show_password_fields, do: :admin_set_password, else: :update_user
-        AshPhoenix.Form.for_update(user, action, domain: Mv.Accounts, as: "user")
+        AshPhoenix.Form.for_update(user, action, domain: Mv.Accounts, as: "user", actor: actor)
       else
         # For new users, use password registration if password fields are shown
         action = if show_password_fields, do: :register_with_password, else: :create_user
 
         AshPhoenix.Form.for_create(Mv.Accounts.User, action,
           domain: Mv.Accounts,
-          as: "user"
+          as: "user",
+          actor: actor
         )
       end
 
@@ -524,7 +540,7 @@ defmodule MvWeb.UserLive.Form do
     user = socket.assigns.user
     user_email = if user, do: user.email, else: nil
 
-    members = load_members_for_linking(user_email, "")
+    members = load_members_for_linking(user_email, "", socket)
 
     # Dropdown should ALWAYS be hidden initially
     # It will only show when user focuses the input field (show_member_dropdown event)
@@ -539,12 +555,15 @@ defmodule MvWeb.UserLive.Form do
     user = socket.assigns.user
     user_email = if user, do: user.email, else: nil
 
-    members = load_members_for_linking(user_email, query)
+    members = load_members_for_linking(user_email, query, socket)
     assign(socket, available_members: members)
   end
 
-  @spec load_members_for_linking(String.t() | nil, String.t() | nil) :: [Mv.Membership.Member.t()]
-  defp load_members_for_linking(user_email, search_query) do
+  @spec load_members_for_linking(String.t() | nil, String.t() | nil, Phoenix.LiveView.Socket.t()) ::
+          [
+            Mv.Membership.Member.t()
+          ]
+  defp load_members_for_linking(user_email, search_query, socket) do
     user_email_str = if user_email, do: to_string(user_email), else: nil
     search_query_str = if search_query && search_query != "", do: search_query, else: nil
 
@@ -555,7 +574,9 @@ defmodule MvWeb.UserLive.Form do
         search_query: search_query_str
       })
 
-    case Ash.read(query, domain: Mv.Membership) do
+    actor = current_actor(socket)
+
+    case Ash.read(query, domain: Mv.Membership, actor: actor) do
       {:ok, members} ->
         # Apply email match filter if user_email is provided
         if user_email_str do