Girlfriend (24f) said I (26m) was being unreasonable for expecting her to buy me a replacement laptop?

I live! with my partner and recently I've noticed when she's tidying some things away she's place them on my laptop. I asked if she would not do that as she's putting quite heavy objects on it and I don't want my laptop to get damaged. She said it'll be fine and to stop worrying but I just asked her again to not do it.

She didn't listen and kept doing it and each time I noticed it I would remove the items. I went to use my laptop and half of the screen just has thick lines through it so the laptop is unusable. I told my girlfriend this and told her it's because she keeps piling things on top of it.

She said it's fine and I can just get a new one but I told her I expect her to replace it since she's the one who broke it. She said it was an accident but I pointed out she repeatedly ignored me when I told her not to put things on it so I expect her to get me a replacement.

She refused and said I could just use hers when she's not using it but I said no, I should have my own laptop and she should replace it since she's the one who damaged it. She got annoyed and said I shouldn't be expecting her to pay for it since it's my laptop and she would have to use some of her savings. I told her it's her own fault and that I need a replacement.

She said I was being unreasonable by asking her to spend some of her savings but I think I'm being reasonable considering she is the one who broke it. How would you handle this?

tl;dr my girlfriend broke the screen on my laptop by repeatedly putting heavy objects on top of it despite me repeatedly asking her not to and moving the items. She said it's unreasonable to expect her to pay for the replacement laptop. How would you handle this?