Add Playwright E2E tests replacing Cypress with MSW integration

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

tests/e2e/specs/accountAdmin/editAccount.spec.ts

@@ -0,0 +1,38 @@
+// The Lucia project.
+// Copyright 2026-2026 DSP, inc.  All rights reserved.
+// Authors:
+//   imacat.yang@dsp.im (imacat), 2026/03/22
+
+import { test, expect } from "@playwright/test";
+import { loginWithMSW } from "../../helpers";
+
+const MODAL_TITLE_ACCOUNT_EDIT = "Account Edit";
+const MSG_ACCOUNT_EDITED = "Saved";
+
+test.describe("Edit an account", () => {
+  test.beforeEach(async ({ page, context }) => {
+    await loginWithMSW(context);
+    await page.goto("/account-admin");
+    await expect(page.getByText("Test Admin").first()).toBeVisible();
+  });
+
+  test("Edit an account; modify name and see saved message.", async ({
+    page,
+  }) => {
+    await page.locator(".btn-edit").first().click();
+    await expect(
+      page.locator("h1", { hasText: MODAL_TITLE_ACCOUNT_EDIT }),
+    ).toBeVisible();
+    await page.locator("#input_name_field").clear();
+    await page.locator("#input_name_field").fill("Updated Name");
+
+    await expect(
+      page.getByRole("button", { name: "Confirm" }),
+    ).toBeVisible();
+    await expect(
+      page.getByRole("button", { name: "Confirm" }),
+    ).toBeEnabled();
+    await page.getByRole("button", { name: "Confirm" }).click();
+    await expect(page.getByText(MSG_ACCOUNT_EDITED)).toBeVisible();
+  });
+});