Randomize & keyboard

Try: press R to reroll the panel, S to toggle the seeded source. The second button only touches the controls below it, and the Source rows are marked randomizable: false so no reroll moves them. With the seed on, the same seed always produces the same roll — press R a few times, set the seed back, and the sequence repeats. Key bindings ignore presses while you are typing in a field: click into Name and press R. Detail has its own randomize: drag it anywhere across 0–64, but every reroll — label, Alt+R, or the button — lands between 8 and 16.