UX: About changeable item type
Item type can be changed, but it does not seem to be obvious. Although there is a floating effect, but the type's drop-down menu should usually have a small triangle.
In addition, for "The following fields will be lost:", maybe add them to extra field to avoid permanent loss.
In addition, for "The following fields will be lost:", maybe add them to extra field to avoid permanent loss.
Since citation styles often expect the absence of 'non-sensical' fields for an item type to be cited correctly, moving them to Extra on switching item types automatically wouldn't be a great idea. Adding it as an option might be worth considering, but would also be pretty in-the-weeds for standard usage and could add more confusion than benefit