Remove per-spec uncaught-exception swallowing in Cypress E2E tests

Co-Authored-By: Codex <codex@openai.com>

cypress/e2e/notFound404.cy.js

@@ -6,11 +6,6 @@
 import { loginWithFixtures } from "../support/intercept";
 
 describe("404 Not Found Page", () => {
-  beforeEach(() => {
-    // Suppress Navbar error on 404 page (route.matched[1] is null)
-    cy.on("uncaught:exception", () => false);
-  });
-
   it("displays 404 page for non-existent route", () => {
     loginWithFixtures();
     cy.visit("/this-page-does-not-exist");