Describe the bug
Categories images in front office is not display properly
To Reproduce
Steps to reproduce the behavior:
Screenshots

Additionnal information
PrestaShop version: 1.7.6.0
PHP version: N/A
Hi @sarahdib I checked for this bug
It seems the real issue is from the fixtures, in the provided images the image for category as a large blank background to be used as a cover background I think:

But if you use a regular image without extended background:

Everything works fine. To be sure I tried to change the image of the category in the back office (in case the image is modified to have a large background automatically). When I use the small image everything works fine and the category page displays correctly:

So there are three possibilities here:
I'd like a feedback on this from @colinegin or @samuel-pires What do you think?
@jolelievre I try with all product and fresh install. It's the same problem.

I know, that's what I'm saying ALL the images used as fixtures for demo are incorrect. You can look into the folder install-dev/fixtures/fashion/img/c
You will see all the images and if you images *_default.jpg they are all overly large.
There is no such an issue in 1.7.5, so first step is to check if fixtures have been changed in 1.7.6
If yes, we should roll back to what was done in 1.7.5.
@TristanLDD you seemed to have an idea of what might have happened here ?
As @jolelievre said the source images are overly large, but their ratio are actually the same as if they were supposed to display in full width on the category bloc.
Some of the Ready themes have such a behavior, here's Lifestyle:

So I assume someone made the images Lifestyle-compliant by enlarging them with a wide background, but replaced them in the classic theme too, where the image area is much smaller. That would explain why the image looks squeezed.
Ok now I'm sure this is the reason, when you go to change the category image with lifestyle theme installed the recommended dimensions are 825x236 which is the size of the wrong images in classic

On classic theme it's 141x180 :

So we do have lifestyle ratio images forced to fit in classic ratio image area.
We just have to change the images in Classic.
Also, note that the lifestyle category bloc doesn't break when classic-ratio images are embedded: the image is not stretched, it's just centered. So there was no point in changing the images in the first place.
Ok that's what I wanted to be sure.. So in classic theme the images are supposed to 141x180 so instead of changing the theme layout and css, we'd better change the image fixtures right?
Yes we just have to switch back to the previous images fixtures.
Ok, on it!