Air units, do they have fuel bars?

i hope air units in PA don't have Fuel bars like the ones in Sup Com FA
i felt the fact of refueling them as an annoying feature of Sup Com FA

No, they won't. It wasn't a very good mechanic.
Bombers have ammo bar, through. Currently it regenerates on the fly, but further balancing may (or may not) change that.

It's an ammo bar not a fuel bar. Lots more tuning to do here. I also want to show this in the hover over state in the bottom left. Incidentally a lot of units use this same system but you don't see the info anywhere (e.g. all artillery, catapults etc).

and i have a chocolate bar , not

They don't have fuel. They have ammo instead.

Bombers use energy with each shot. They have a certain storage and a certain recharge rate. If you have negative energy, your bombers will become useless.

In the future defense towers will also use energy.