test: Fix Users Create page E2E test assertion

- Changed expected content check from exact "Create" to regex match /Create|추가|사용자/i
- Users/Create page uses Korean title "새 사용자 추가" (Add New User)
- Test now properly validates page content in both English and Korean contexts
- All 8 E2E tests now pass (7.0s total runtime)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

tests/e2e/complete-admin-flow.spec.ts

@@ -88,7 +88,7 @@ test.describe('Complete Admin Flow - All Pages', () => {
     expect(response?.status()).toBeLessThan(400);
     const content = await page.content();
     expect(content).not.toContain('500');
-    expect(content).toContain('Create');
+    expect(content).toMatch(/Create|추가|사용자/i);
 
     console.log('✓ Users Create page accessible');
   });