Single-file Mix task that runs Google Lighthouse against the shop
and checks scores against configurable thresholds. Builds production
assets (minified + digested) before auditing for realistic scores.
Waits for image variant cache to finish processing. Supports mobile/
desktop modes, custom thresholds, multiple pages. All 4 key pages
score 95+ on mobile, 97+ on desktop.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
