clearer and more harmonious error messages

Idea

+priority

 

Where/how do error messages appear now?

alert corner in lower-right

yellow box appended/prepended to relevant card

??

 

Specific errors wanting help

 

 

including relevant tickets:

 

 

 

the general idea is fine, but a lot of progress has been made, and there's not much concrete to go on here...

+relevant user stories