update: chart thumbnails

[0xB10C]

I'm trying to update them about every 6 months. Last update was 8 months ago. Trying to do the next one by 2026-07-15 or so.

They were W: 1296px | H: 650px and now are W: 1116px | H: 650px, but both should be fine.

[vostrnad]

Any idea why the resolution changed? When I generate them at the latest commit they're still 1296 x 650. And there's still the issue with file size, the thumbnails I'm generating are almost half the file size despite being completely indistinguishable (loading the main page, my browser reports 3.69 MB in downloaded images for master and 1.99 MB when using my thumbnails).

[0xB10C]

Any idea why the resolution changed?

Probably because my browser wasn't full resolution.

And there's still the issue with file size, the thumbnails I'm generating are almost half the file size despite being completely indistinguishable.

Hm that's a significant difference. What browser did you use?

[vostrnad]

What browser did you use?

Chrome, I couldn't get the thumbnail generation to work in Firefox.

I understand now why the resolution changed, it depends on how you size your browser window. However, the original resolution was better as it resulted in the thumbnails getting cropped horizontally while now they're cropped vertically – hiding time ranges is much more acceptable than hiding graph values, for some graphs that start slow this hides large parts entirely. Fix in #124.