Add width and height to every image (fix layout shift)

Images without explicit width and height attributes have no reserved space until they load, so surrounding content jumps — that jump is Cumulative Layout Shift (CLS), a Core Web Vital.

How to fix it

• Always emit intrinsic width and height attributes; the browser derives the aspect ratio and reserves the box. Shopify's image_tag does this for you.
• Use CSS aspect-ratio or height: auto so the image scales responsively while keeping the reserved ratio.

<img src="..." width="1500" height="1000" style="height:auto" alt="...">