Eh, I'm trying to go for more vague categories since more specific ones may or
may not fit into a particular heading.

Tradehugs is lovey-dovey. It's "I'm so sorry I hit your base, here's some fighters
to pay for it." It's more than just a truce, it's a squishy non-aggressive love
affair between players.

Paint scratcher is... eh, you might occasionally get podded, but more likely
you'll just get your paint scratched by a few figs or mines.

A truce can fall in either category, or neither. It can be a regular game with
an enforced truce for X days, where the limits to hostility are especially spelled
out.