Doesn't fill too much or too little of the canvas

https://docs.flathub.org/docs/for-app-authors/appdata-guidelines/quality-guidelines/#reasonable-footprint

Read the linked Flathub “reasonable footprint” guideline and inspect the attached image to understand which visual asset is being flagged. Locate the corresponding asset in the repository, then confirm that the finished change satisfies the guideline without excess empty space or cropping.

Written by the indexing model from the issue text.