fix(pipeline): skip waking on empty messages

Author: Reisenbug

astrbot/core/pipeline/waking_check/stage.py

@@ -143,6 +143,10 @@ async def process(
                 event.is_at_or_wake_command = True
                 wake_prefix = ""
 
+        if is_wake and not event.message_str and not messages:
+            event.stop_event()
+            return
+
         # 检查插件的 handler filter
         activated_handlers = []
         handlers_parsed_params = {}  # 注册了指令的 handler