Better parallax

[snqb]

Expands on #2619

• uses other background(8kb), which also has starry background, taken from https://www.transparenttextures.com
• adds transition for less intrusive, smoother bg scroll

feel free to tweak things to your liking, but it came out pretty neat

there is one visible side-effect of using "touchmove" -- you can encounter it after scrolling down, then coming back back to the top of the list. But to my liking, it creates a rubberband-like experience, and basically is feature, not a bug 🤓
feel free to criticize this, i surely can find a solution of this, but I like it :D
https://github.com/user-attachments/assets/4ae390f3-f012-45bc-9b45-6ff951895b8e

[raineorshine]

Hi, thanks for this!

So, I'm going to have to ask you to break this down into one PR per issue. It's too hard to keep track of multiple threads of conversation related to multiple issues in a single PR.

• subscribes to "touchmove" rather than "scroll" to calculate y position -- thus autofocus does not trigger "parallax" - [Mobile] ScrollZone parallax does not take into account autofocus cropping #2651 (comment)

That would fail to trigger parallax when a programmatic scroll is triggered (e.g. when the cursor is automatically scrolled into view).

The proper solution will make the parallax based on the autofocus-adjusted scroll position rather than the exact scroll position.

[snqb]

@raineorshine i removed the thing and edited the description

[raineorshine]

Looks good! I like the new image.

After playing around with the transition, I decided I didn't like the delay. It feels better to me if the ScrollZone pans immediately, proportional to the number of pixels scrolled. If it feels choppy, it's probably because the frame rate is dropping.

I'm open to further discussion if it continues to be a problem.