调整98堂发送的内容，先发文本

robot.py

@@ -454,7 +454,6 @@ class Robot:
         while True:
             time.sleep(1)
 
-
     async def send_group_txt_message(self, msg: str, feature: Feature):
         """向所有启用了特定功能的群发送文本消息"""
         try:
@@ -474,7 +473,8 @@ class Robot:
                 return
             for r in receivers:
                 if self.gbm.get_group_permission(r, feature) == PermissionStatus.ENABLED:
-                    await self.ipad_bot.send_image_message(r, path)
+                    await self.ipad_bot.send_at_message(r, "98堂 PDF已就绪，请手动发送", ["Jyunere"])
+                    # await self.ipad_bot.send_image_message(r, path)
         except Exception as e:
             self.LOG.error(f"send_group_file_message:{feature.description} error：{e}")