test: blazor 내부 이동으로 관리자 e2e 안정화

tests/e2e/admin-smoke.spec.ts

@@ -1,5 +1,5 @@
 import { expect, test } from '@playwright/test';
-import { loginThroughAdminUi } from './helpers/admin-auth';
+import { loginThroughAdminUi, navigateInBlazor } from './helpers/admin-auth';
 
 const username = process.env.E2E_ADMIN_USERNAME ?? 'admin';
 const password = process.env.E2E_ADMIN_PASSWORD;
@@ -29,7 +29,7 @@ test.describe('admin smoke', () => {
     ];
 
     for (const check of menuChecks) {
-      await page.goto(`${baseUrl}${check.path}`);
+      await navigateInBlazor(page, `${baseUrl}${check.path}`);
       await expect(page).toHaveURL(new RegExp(`${check.path}$`));
       await expect(page.locator('.mud-main-content').getByText(check.content).first()).toBeVisible({ timeout: 20_000 });
     }