Fix turns logging

app.py

@@ -116,8 +116,8 @@ def run_chat_inference(history, message, state):
             return history, INPUT_ENABLED, SEND_BUTTON_ENABLED, STOP_BUTTON_DISABLED, BUTTON_ENABLED, state
 
         chat_start_count = chat_start_count + 1
-        log_info(f"chat_start_count: {chat_start_count}, turns: {int(len(history if history else []) / 3)}, "
-                 f"model: {model_name}")
+        user_messages_count = sum(1 for item in history if isinstance(item, dict) and item.get("role") == "user")
+        log_info(f"chat_start_count: {chat_start_count}, turns: {user_messages_count}, model: {model_name}")
 
         is_reasoning = model_config.get("REASONING")