Update ai_engine.py

ai_engine.py

@@ -60,7 +60,7 @@ class LocalModelHandler:
             self.model = None
             self.tokenizer = None
 
-    def chat_stream(self, messages, max_new_tokens=512, temperature=0.7):
+    def chat_stream(self, messages, max_new_tokens=512, temperature=0.5):
         """
         Streams response exactly like the API-based chat_stream function.
         Args: