fix

src/main/java/com/newyetai/sdk/ai/service/service/AiProvider.java

@@ -39,6 +39,7 @@ public class AiProvider {
     if (aiProperties.getChatProvider().equals(XfProperties.PREFIX)) {
       return XfSparkProvider.httpChat(req);
     } else {
+      req.setModel("deepseek-chat");
       return DeepSeekProvider.httpChat(req);
     }
   }