refactor: delete the compatibility config surface

examples/basic-app/wrnexus.config.ts

@@ -13,8 +13,6 @@ import type { AppConfig } from "@wrnexus/styles";
  * framework-level headers and optional CORS.
  */
 const config: AppConfig = {
-  frameworkBehaviour: 1,
-  compatibilityDate: "2026-08-02",
   head: [
     // --- Use a CSS framework via CDN (uncomment one) ---
     // Bootstrap: