Exercise card without interactive exercise should have different card actions
Currently those cards without any interaction still have 'Check input' and 'reset' actions. They should just have one single action 'Exercise completed' to mark them done.
Chapter 5 geometry has lots of those:
https://vorkurs-mathematik.innocampus.tu-berlin.de/section/005-VBKM05/002-M05_Dreiecke/002-VBKM05_Pythagoras_Content