Indicate when no active tasks/terminals are found to avoid hallucination about active tasks/terminals that have been cancelled (#94)

* fix bug

* update baseline

* update baseline

* add logs

* tweak

* bring back some changes

* don't invoke get output tool in run task

* improve prompt messaging

* Apply suggestion from @meganrogge

* Apply suggestion from @meganrogge

* Apply suggestion from @meganrogge

* update baseline

* update baseline

* add baseline

* address feedback

* update baseline