Migrate Cypress E2E from cy.intercept to MSW service worker

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

cypress/e2e/myAccount.cy.js

@@ -9,7 +9,7 @@ describe("My Account Page", () => {
   beforeEach(() => {
     loginWithFixtures();
     cy.visit("/my-account");
-    cy.wait("@getUserDetail");
+    cy.contains("Test Admin").should("exist");
   });
 
   it("displays user name heading", () => {