[Feature Request] Precise info when hovering reference in pdf reader

When reading a paper with tens of references, it would be really nice to be able to hover the mouse over the references and have a popup with more info (without having to go to the end of the document). Maybe just when holding a key like ALT.
Even better would be to have it connected to your zotero library so that you know if you already have downloaded the reference, annotated it, etc...

For instance, when hovering the mouse over the [15] in "According to [15], ...", you would see a popup with:
- Paper name
- Authors
- Date
- Already in your Zotero library
- Your notes on this paper if any

I think it would be amazing for when you start to be acquainted with a specific research domain and the same papers tend to be cited in several of the papers that you read.
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