It never even occurred to me to crate her during meals! Right now we crate only at bedtime and when we are all out of the house. So should I crate her when I start cooking, or right before we sit down? I'm assuming this arrangement doesn't last forever?
It's up to you really. Mine don't bother me/misbehave in the kitchen or jump up or anything. I teach that early on. I usually just crate before we sit down to eat, if I'm crating. If she's crate trained, she should be fine with it and feel secure in her crate. I let mine watch cartoons. 😆
If she misbehaves when you're cooking, you could crate sooner.
You will also benefit greatly from teaching the place command and extending duration. Patience is key and your pup is young. I taught Logan (my Golden) the concept of place early on and he also understood the down command. We added duration over time. It's a great skill for your dog to have to avoid overexcited greetings, transfers well to eating out with your dog, is helpful for breaks if you ever get involved in agility, obedience, etc.
Place Command