Preview-images (thumbnails) of images in WebP-format are square-shaped even if the original image is not

[MoonlightWave-12]

Bug Description

Normally, preview-images should have the same aspect-ratio as the original image, but currently, after sending images in the WebP-format, the preview-images will be made of a square-shaped part of the middle of the image.

There is also a similar issue with the preview before sending the image:

Steps to Reproduce

1. Open a chat.
2. Send an image in WebP-format (do not use the "Compress"-function).
3. Look at the preview-image of the sent image.

Expected Behavior

The preview-image should show the entire image, with the aspect-ratio of the original image.

App Version

1.23.0

Additional Platform Information

Debian GNU/Linux Testing (Trixie) - Flatpak

Additional Context

Test-image:

Note: I added .jpg to the file-name, because GitHub does not support uploading files with a file-name ending with .webp. To make that correct again, simply change the file-extension to .webp after downloading the image.