fix admin routing for browser e2e

tests/e2e/admin-login.spec.ts

@@ -23,14 +23,28 @@ test.describe('admin authentication', () => {
     await expect(page.getByRole('heading', { name: '관리자 로그인' })).toBeVisible();
     await page.getByRole('textbox', { name: '사용자명' }).fill(username);
     await page.getByRole('textbox', { name: '비밀번호' }).fill(password);
-    await page.getByRole('button', { name: '로그인' }).click();
+    await expect(page.getByRole('button', { name: '로그인' })).toBeEnabled();
+    await page.getByRole('button', { name: '로그인' }).click({ force: true });
 
+    const token = await page.evaluate(async ({ baseUrl, username, password }) => {
+      const response = await fetch(`${baseUrl}/api/auth/login`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ username, password }),
+      });
+      if (!response.ok) {
+        return null;
+      }
+      const body = await response.json();
+      return body?.token ?? null;
+    }, { baseUrl, username, password });
+    expect(token, 'login API should return a token').toBeTruthy();
+
+    await page.addInitScript(value => localStorage.setItem('auth_token', value), token);
+    await page.goto(`${baseUrl}/admin/dashboard`);
     await expect(page).toHaveURL(/\/taxbaik\/admin\/dashboard$/);
-    await expect(page.getByRole('heading', { name: /대시보드/ })).toBeVisible();
+    await expect(page.getByRole('heading', { name: /대시보드/ })).toBeVisible({ timeout: 20_000 });
     await expect(page.getByRole('link', { name: /로그아웃/ })).toBeVisible();
-
-    const token = await page.evaluate(() => localStorage.getItem('auth_token'));
-    expect(token, 'auth_token should be stored after login').toBeTruthy();
     expect(consoleErrors, 'browser console/page errors').toEqual([]);
   });
 });