refactor: reduce nesting in HasPermission.strict_check_with_permissions

Extract strict_check_filter_scope/4 to satisfy Credo max depth 2.

lib/mv/authorization/checks/has_permission.ex

@@ -132,26 +132,10 @@ defmodule Mv.Authorization.Checks.HasPermission do
              resource_name
            ) do
         :authorized ->
-          # For :all scope, authorize directly
           {:ok, true}
 
         {:filter, filter_expr} ->
-          # For :own/:linked scope:
-          # - With a record, evaluate filter against record for strict authorization
-          # - Without a record (queries/lists), return false
-          #
-          # NOTE: Returning false here forces the use of expr-based bypass policies.
-          # This is necessary because Ash's policy evaluation doesn't reliably call auto_filter
-          # when strict_check returns :unknown. Instead, resources should use bypass policies
-          # with expr() directly for filter-based authorization (see User resource).
-          if record do
-            evaluate_filter_for_strict_check(filter_expr, actor, record, resource_name)
-          else
-            # No record yet (e.g., read/list queries) - deny at strict_check level
-            # Resources must use expr-based bypass policies for list filtering
-            # Create: use a dedicated check that does not return a filter (e.g. CustomFieldValueCreateScope)
-            {:ok, false}
-          end
+          strict_check_filter_scope(record, filter_expr, actor, resource_name)
 
         false ->
           {:ok, false}
@@ -175,6 +159,15 @@ defmodule Mv.Authorization.Checks.HasPermission do
     end
   end
 
+  # For :own/:linked scope: with record evaluate filter; without record deny (resources use bypass + expr).
+  defp strict_check_filter_scope(record, filter_expr, actor, resource_name) do
+    if record do
+      evaluate_filter_for_strict_check(filter_expr, actor, record, resource_name)
+    else
+      {:ok, false}
+    end
+  end
+
   @impl true
   def auto_filter(actor, authorizer, _opts) do
     resource = authorizer.resource