Refactor module middleware initialization logic.

Replaced `getMiddleware` with `onServerInit` for streamlined middleware registration. Updated `AppAuth` to automatically register its authentication middleware. Added a test case to verify middleware registration. Removed redundant cookie renewal logic from `AdminController` and made related adjustments across modules.

app/src/modules/server/AdminController.tsx

@@ -65,8 +65,6 @@ export class AdminController extends Controller {
          }
          c.set("html", html);
 
-         // refresh cookie if needed
-         await auth.authenticator?.requestCookieRefresh(c);
          await next();
       });