feat(login): emit login and online status events

channel-service/app/clients/pywechat_client.py

@@ -90,6 +90,20 @@ class PyWeChatClient:
             pass
         return self.state
 
+    def set_login_status(self, status: LoginStatus, error_message: Optional[str] = None) -> None:
+        old = self.state.login_status
+        self.state.login_status = status
+        if status == LoginStatus.SUCCESS:
+            self.state.online_status = OnlineStatus.ONLINE
+            self.state.last_heartbeat_at = time.time()
+        elif status in (LoginStatus.EXPIRED, LoginStatus.FAILED):
+            self.state.online_status = OnlineStatus.OFFLINE
+        if error_message:
+            self.state.error_message = error_message
+
+    def set_online_status(self, status: OnlineStatus) -> None:
+        self.state.online_status = status
+
 
 class ClientRegistry:
     def __init__(self):