i have just again a question which i could not solve by my own. I have created my own E-Mail Roboter which sends different mails as if you would mark the "Send Notification" checkbox in the Workflow role. In my E-Mail Roboter is now the direct link to the User Activity during the workflow missing. You have only the link to the Promotion Request.
I tried to setup a workflow variable "wflink" with Windchill Classname: wt.workflow.work.WFAssignedActivity and get the activity with "self" but i just get what you see in the first screenshot and here is the link which will be generated.