LCP 3.4s -> 1.9s by promoting one image

LCP 3.4s -> 1.9s by promoting one image
The largest image was discovered late because it sat inside a CSS background, invisible to the preload scanner.
— Moved it to <img> with fetchpriority="high": request started 820ms earlier
— Removed loading="lazy" from the hero (it was deferring the LCP element itself)
— Browser default priority for in-viewport images is Low until layout; fetchpriority forces High at queue time
Net: LCP element download began at 310ms instead of 1130ms. No bytes changed, only request order.
Takeaway: -1500ms LCP from request priority alone, zero KB saved.