fix: enable Tidewave remote access properly

Pass allow_remote_access option directly to the Tidewave plug
instead of using application config (which was not being read).
Remove the ineffective config line from dev.exs.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lib/simpleshop_theme_web/endpoint.ex

@@ -32,7 +32,7 @@ defmodule SimpleshopThemeWeb.Endpoint do
     cache_control_for_etags: "public, max-age=31536000, immutable"
 
   if Code.ensure_loaded?(Tidewave) do
-    plug Tidewave
+    plug Tidewave, allow_remote_access: true
   end
 
   # Code reloading can be explicitly enabled under the