Refactor layout function to simplify error handling for layout configuration

Author: Flo0807

lib/backpex/html/layout.ex

@@ -13,34 +13,8 @@ defmodule Backpex.HTML.Layout do
 
   def layout(assigns) do
     case assigns.live_resource.config(:layout) do
-      {module, fun} ->
-        apply(module, fun, [assigns])
-
-      fun when is_function(fun, 1) ->
-        fun.(assigns)
-
-      wrong_config ->
-        raise ArgumentError, """
-        Invalid layout configuration for Backpex LiveResource.
-
-        Expected one of:
-          • A tuple with module and function: {MyAppWeb.Layouts, :admin}
-          • A function reference: &MyAppWeb.Layouts.admin/1
-
-        Got: #{inspect(wrong_config)}
-
-        Examples of valid configurations:
-
-          # Option 1: Module and function tuple
-          use Backpex.LiveResource,
-            layout: {MyAppWeb.Layouts, :admin}
-
-          # Option 2: Function capture
-          use Backpex.LiveResource,
-            layout: &MyAppWeb.Layouts.admin/1
-
-        Make sure your layout function accepts assigns and returns rendered HTML.
-        """
+      {module, fun} -> apply(module, fun, [assigns])
+      fun when is_function(fun, 1) -> fun.(assigns)
     end
   end