Connect product/blog pages, mega menu, and instant search to Meshkee backend

Add /products (list + detail) and /blog (list + detail) routes backed by
the real Meshkee API, a real category-hierarchy mega menu (level 2/3 only),
debounced instant search proxied through a same-origin API route, and
tel:-link fallbacks on product cards when no price is set. Also fixes
Product price normalization to read the real API shape instead of a
guessed one, and hardens product linking against catalog sources that
don't expose a slug.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/components/home/BrandGroupCarousels.tsx

@@ -2,9 +2,15 @@ import { Carousel } from "@/components/ui/Carousel";
 import { ProductCard } from "@/components/ui/ProductCard";
 import { SectionTitle } from "@/components/ui/SectionTitle";
 import { EmptyState } from "@/components/ui/EmptyState";
-import type { ProductGroup } from "@/lib/meshkee";
+import { productHref, type ProductGroup } from "@/lib/meshkee";
 
-export function BrandGroupCarousels({ brandGroups }: { brandGroups: ProductGroup[] }) {
+export function BrandGroupCarousels({
+  brandGroups,
+  contactPhone,
+}: {
+  brandGroups: ProductGroup[];
+  contactPhone?: string;
+}) {
   if (brandGroups.length === 0) {
     return (
       <section className="py-10 md:py-14">
@@ -31,6 +37,8 @@ export function BrandGroupCarousels({ brandGroups }: { brandGroups: ProductGroup
                   price={product.price}
                   image={product.image ?? "/images/placeholder.svg"}
                   variant="brand"
+                  href={productHref(product)}
+                  contactPhone={contactPhone}
                 />
               ))}
             </Carousel>