perf(storefront): route brand logos through cdn-cgi image resizing#286

What happened

Brand logos ship as raw files while product photos already use Cloudflare image resizing. Measured on the homepage:

• cdn.darjs.dev/brands/herbamama.webp = 205KB, rendered roughly 44px tall in a logo strip
• double-wood-supplements.webp = 62KB, doctors-best.webp = 29KB, nordic-naturals.webp = 15KB
• The same Herbamama file through our own transform returns 1.4KB: https://cdn.darjs.dev/cdn-cgi/image/width=96,quality=75,format=auto/https://cdn.darjs.dev/brands/herbamama.webp

That is about 250KB+ of avoidable transfer on the homepage alone, plus wherever else logos render (sidebar, footer, product pages).

Plan

Route every brand logo reference through /cdn-cgi/image/width=<slot*2>,quality=75,format=auto/ like product images already do. Pick widths from the actual render slots.

Acceptance criteria

• No brand logo transfers more than ~10KB on the homepage
• Total homepage image transfer drops by at least 200KB
• Logos stay crisp on 2x screens