I did not same the same thing as you. This is what you described initially:
This is, without a doubt, the most ridiculous thing I've read about this game. It's simply bad design. No combat ship engineer in their right mind would design a ship in this manner. Anyone who's given a single thought about "how would you survive combat at your duty station" would find the fool who designed their ship the way you describe and keel haul them. Then they would jury rig an 02 supply to their duty station to plug their flight suit into, so you'd have hours of O2 available to you, unless you need to leave your station.
Which you wouldn't need to do, because there would be no oxygen to feed a fire, so you wouldn't need to fight one in the first place.
The only people who think a pressurized oxygen-rich environment is a good thing to have in a ship about to go into combat are Hollywood producers, who don't want to cover the faces of those expensive actors they hired with some kind of helmet.