Right I'm just gonna write this all as I go because then hey, it's a genuine impression of the first chapter.
So! I'll jump straight into this review by saying that I, personally, love that first sentence. The description's great (and I love a good bit of description) however(!!), your problem straight away is that sentence is just too long. End it where you say Stacks, then start a new sentence to describe what the Stacks are. You're introducing all these new ideas without even giving a reader a full stop to breathe, and I think this will really impact how the whole first chapter flows. And then there's so many interesting things in that first paragraph, so don't bog readers down trundling through one sentence that long. Impact.
A few paragraphs in, I'm super interested (spotted a spelling error here - grading -> grating) I don't massively feel like I need more description yet because seriously, steel-enforced levels disappearing into darkness? That is ALL I need to know, that's so interesting. (btw did you read the invisible library? because this is giving me those vibes straight away)
I now see what you mean about the extra chairs bit, and honestly, this compared with the wall of computer monitors is all I need to know, it's not static description, it's description in motion and I prefer to use this myself.
You're dropping little bits of worldbuilding and I love that too! fire goblin! yes!
I would however say that i didn't get a massive emotional response from jamie from the events at the end of the chapter? that'd be my main problem with this considering something so weird had happened
but then! great hook for the next chapter at the end, you could tell something weird was happening with the curator business, and the whole end sequence was a big question mark. I'm trying to think what your main problem would be and my only suggestions would be perhaps more oomph to the scifi natuer of the beginning because it took until the computer bit for that to really kick in, but that might be my personal imagery. Also, as much as you don't want to be:
sprinkling a bit more description as your MC does things really flavours the piece. I'm reflecting back on this now and kind of finding a couple of bits slightly hollow. You don't need her to describe her flowing locks of hair or go into intimate detail painting the whole scene out in one paragraph, just tell us how the seat feels and what the corridor she walks down is like and what the floor feels like under her feet and how light it is and if it's hot or cold etc.
Don't go overboard (I do this, people have complained) but just a little more really adds flavour.
(my god this got long i hope it's helpful, also i've subscribed 'cause this is interesting)