Add route isolation smoke harness

playwright.config.ts

@@ -46,6 +46,11 @@ export default defineConfig({
       name: 'Admin Smoke',
       testMatch: /admin-smoke\.spec\.ts$/,
       use: { ...devices['Desktop Chrome'] }
+    },
+    {
+      name: 'Route Isolation',
+      testMatch: /route-isolation\.spec\.ts$/,
+      use: { ...devices['Desktop Chrome'] }
     }
   ]
 });

tests/e2e/route-isolation.spec.ts

@@ -0,0 +1,20 @@
+import { expect, test } from '@playwright/test';
+
+const baseUrl = (process.env.E2E_BASE_URL ?? 'https://www.taxbaik.com/taxbaik').replace(/\/$/, '');
+
+test.describe('route isolation', () => {
+  test('public home does not boot the admin app', async ({ page }) => {
+    await page.goto(baseUrl);
+    await expect(page).not.toHaveTitle(/관리자/);
+    await expect(page).toHaveTitle(/백원숙 세무회계/);
+    await expect(page.getByRole('heading', { name: /상담 과정/ })).toBeVisible();
+    await expect(page.getByRole('link', { name: /카카오 상담하기|카카오채널 문의/ })).toBeVisible();
+  });
+
+  test('admin login boots the admin app under the admin base path', async ({ page }) => {
+    await page.goto(`${baseUrl}/admin/login`);
+    await expect(page).toHaveTitle(/관리자 로그인/);
+    await expect(page).toHaveURL(/\/taxbaik\/admin\/login$/);
+    await expect(page.getByRole('heading', { name: /관리자 로그인/ })).toBeVisible();
+  });
+});