Migrate Cypress E2E from cy.intercept to MSW service worker

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

cypress/e2e/accountAdmin/accountDuplicationCheck.cy.js

@@ -12,17 +12,23 @@ describe("Account duplication check.", () => {
   beforeEach(() => {
     loginWithFixtures();
     cy.visit("/account-admin");
-    cy.wait("@getUsers");
+    cy.contains("Test Admin").should("exist");
   });
 
   it("When an account already exists, show error message on confirm.", () => {
     const testAccountName = "000000";
 
-    // First creation: account doesn't exist yet
-    cy.intercept("GET", "/api/users/000000", {
-      statusCode: 404,
-      body: { detail: "Not found" },
-    }).as("checkNewUser");
+    // First creation: account doesn't exist yet — override via MSW
+    cy.window().then((win) => {
+      const { http, HttpResponse } = win.__msw__;
+      win.__mswWorker__.use(
+        http.get("/api/users/000000", () =>
+          HttpResponse.json(
+            { detail: "Not found" },
+            { status: 404 },
+          )),
+      );
+    });
 
     cy.contains("button", "Create New").should("be.visible").click();
     cy.get("#input_account_field").type(testAccountName);
@@ -34,20 +40,22 @@ describe("Account duplication check.", () => {
       .should("be.visible")
       .and("be.enabled")
       .click();
-    cy.wait("@postUser");
     cy.contains("Account added").should("be.visible");
 
-    // Second creation: now account exists — override to return 200
-    cy.intercept("GET", "/api/users/000000", {
-      statusCode: 200,
-      body: {
-        username: "000000",
-        name: "000000",
-        is_admin: false,
-        is_active: true,
-        roles: [],
-      },
-    }).as("checkExistingUser");
+    // Second creation: now account exists — override to return 200 via MSW
+    cy.window().then((win) => {
+      const { http, HttpResponse } = win.__msw__;
+      win.__mswWorker__.use(
+        http.get("/api/users/000000", () =>
+          HttpResponse.json({
+            username: "000000",
+            name: "000000",
+            is_admin: false,
+            is_active: true,
+            roles: [],
+          })),
+      );
+    });
 
     cy.contains("button", "Create New").should("be.visible").click();
     cy.get("#input_account_field").type(testAccountName);