docs: codify public admin smoke harness

tests/e2e/admin-smoke.spec.ts

@@ -19,6 +19,10 @@ test.describe('admin smoke', () => {
       consoleErrors.push(error.message);
     });
 
+    await page.goto(`${baseUrl}/admin/login`);
+    await expect(page).toHaveTitle(/관리자/);
+    await expect(page.getByRole('heading', { name: /관리자 로그인/ })).toBeVisible();
+
     await loginThroughAdminUi(page, baseUrl, username, password);
 
     const menuChecks = [

tests/e2e/public-smoke.spec.ts

@@ -6,6 +6,7 @@ test.describe('public smoke', () => {
   test('loads the main public pages with SEO basics', async ({ page }) => {
     await page.goto(baseUrl);
     await expect(page).toHaveTitle(/백원숙 세무회계/);
+    await expect(page).not.toHaveTitle(/관리자/);
     await expect(page.locator('meta[name="description"]')).toHaveAttribute('content', /사업자 기장|부동산|종합소득세/);
     await expect(page.getByRole('heading', { name: '세금과 자산 한 번에 해결하는' })).toBeVisible();