Update agent_service.py

agent_service.py

@@ -316,7 +316,7 @@ class AgentService:
             response = await client.chat_completion(
                 messages=messages,
                 model="Qwen/Qwen2.5-72B-Instruct",  # Best for Vietnamese + tool calling
-                max_tokens=1024,  # Increased to prevent truncation
+                max_tokens=2048,  # Increased to prevent truncation
                 temperature=0.7,
                 tools=tools,
                 tool_choice="auto"  # Let model decide when to use tools