Request to have the support for the Pipeline approver getting the notification

设计了一个Pipeline，其中部署操作需要一个确认，设定审批者为“dev2wa"。如当用户“dev2po"执行到需要确认步骤，此时用户“dev2wa"如何可以获得需要审批的通知？能否增加一个通知栏，如云平台右上角的通知功能。

The issue requests notifications for users assigned as Pipeline approvers, potentially through a notification area like the cloud platform's upper-right notifications. No files, tests, or entry points are identified; first clarify the existing approval flow and notification design, then define completion as the assigned approver receiving a clear pending-approval notification.

Written by the indexing model from the issue text.