Update LangGraphAgent to use mistralai/mistral-small-3.2-24b-instruct model instead of glm-4.5-air

agent.py

@@ -78,8 +78,8 @@ class LangGraphAgent:
             #     model="gemma-3-27b-it",
             # )
             model = ChatOpenRouter(
-                model="z-ai/glm-4.5-air:free",
-                temperature=0.1,
+                model="mistralai/mistral-small-3.2-24b-instruct:free",
+
             )
             if model is None and ChatOpenAI is not None:
                 model = ChatOpenAI(