Fix channel names in answers on history.

fjerkroa_bot/ai_responder.py

@@ -224,6 +224,8 @@ class AIResponder(object):
                                       response['hack'])
         if response_message.staff is not None and response_message.answer is not None:
             response_message.answer_needed = True
+        if response_message.channel is None:
+            response_message.channel = message.channel
         return response_message
 
     def short_path(self, message: AIMessage, limit: int) -> bool: