Imported Images Should Preserve Their Original Aspect Ratio

Current behavior: When importing an image directly or using it as a Shape background, the element inherits the canvas aspect ratio instead of the image’s original dimensions. This creates unnecessarily large bounding boxes and makes positioning and animation less intuitive.

Expected behavior: Imported images and Shape backgrounds should preserve their original aspect ratio and automatically size their bounds to the source asset. Users should still be able to choose to stretch or fill the canvas if desired.