On the battlefield, there are "morale" cells...

You are 100% wrong! If morale triggers, it will trigger on any cell! Personally verified in practice!!

The walkthrough is impressive! Question for the esteemed vbn: how do you determine a hero's movement range in the editor?

With your permission, I will answer for the esteemed vbn. In the map editor, it is impossible to determine the movement range, because it is always different and is recalculated every day for each hero on the map, in the tavern (+ in the tavern with the companion), or in the dungeon.
There is a so-called starting movement range, which is also different for each hero; this is very well described in the Physics Manual.