fix: bug

src/core/voip/bot.py

@@ -360,7 +360,7 @@ class MyCall(pj.Call):
 
 class ToTextBotAgent:
     def __init__(self, user_asr_text, call_agent):
-        if not user_asr_text or call_agent.action.get("action_code") != "normal":
+        if not user_asr_text or (call_agent.action and call_agent.action.get("action_code") != "normal"):
             print("ASR文本为空，终止执行。")
             return
         self.call_agent = call_agent