🐛 (expo): Fix download item heights

[Arklaum]

The DownloadRowItem's have different heights depending on the title having one or two lines, which makes things look uneven when using thumbnail ratio 1:1.41 or 1:1.5:

Before vs After

Before	After
In "After" the thumbnails/download row items look taller because I use thumbnail 1:1.41, but if you use 1:1.5 they're near identical to before (~2px taller). All explained below.

Up until now all widths have been fixed with height varying based on the thumbnail ratio, because that worked well for the grids and horizontal lists. But these should probably use a fixed height with varying widths, so I've done that.

Now with all thumbnails being the same height regardless of aspect ratio, the actual fix is just to reduce the padding slightly, but there are other ways if you prefer (like reducing text size or line spacing).

---

Also I've used useMemo the same way it's used in useListItemSize, but they're cheap calculations so doesn't it actually hurt performance? Maybe we can just enable the React Compiler at some point to not need to think about these things ever again?

[aaronleopold]

Sorry I didn't get to this earlier over the weekend, but this looks great! Thank you!

---

Maybe we can just enable the React Compiler at some point to not need to think about these things ever again?

Yeah 100%, I've been meaning to give it a try. I started a wip branch here if you're interested: https://github.com/stumpapp/stump/tree/unstable-dependency-upgrades