fix: add missing List import in api.py

hunyuan3dweb/api.py

@@ -8,7 +8,7 @@ import requests
 import json
 import time
 import os
-from typing import Optional, Dict, Any
+from typing import Optional, Dict, Any, List
 from urllib.parse import urlparse, unquote
 from .sign import sign, sign_with_custom_nonce