✅ test(files): update file upload mock data in integration tests

- add host and bucket fields to mock response to match actual API response structure
- ensure test data completeness for multipart upload testing scenarios

src/server/api/files/__tests__/files.integration.test.ts

@@ -408,7 +408,9 @@ describe('File API Integration Tests', () => {
         fileId: 1,
         url: 'https://minio.example.com/file.zip',
         key: '1/test-file.zip',
-        size: 2048
+        size: 2048,
+        host: 'http://undefined:undefined',
+        bucket: 'd8dai'
       };
 
       const mockCompleteMultipartUpload = vi.fn().mockResolvedValue(mockResponse);