Hero: banner-3 (bonbon field) replaces the matcha campaign ad (Q3)

- composed hero stays split ivory/copy + image; bonbons carry the
  mustard/oxblood/copper of the r9 direction; Shop Chocolate opens
  same-tab now
- preview mock shown and approved before this commit; swap again when
  the r9 shoot lands

src/components/sections/Hero.tsx

@@ -33,12 +33,7 @@ export default function Hero() {
             <a href="/our-world" className="btn btn-dark">
               Discover Mozimo
             </a>
-            <a
+<a href="/chocolate" className="btn btn-ghost">
-              href="/chocolate"
-              target="_blank"
-              rel="noopener noreferrer"
-              className="btn btn-ghost"
-            >
               Shop Chocolate
             </a>
           </div>
@@ -55,8 +50,8 @@ export default function Hero() {
         {/* image — bright, no filter */}
         <div className="relative min-h-[70vh] overflow-hidden lg:min-h-full">
           <img
-            src="/banners/banner-1.jpg"
+            src="/banners/banner-3.jpg"
-            alt="Mozimo single origin chocolate"
+            alt="Mozimo bonbons — ganache, pralines and barks"
             className="kenburns absolute inset-0 h-full w-full object-cover"
             fetchPriority="high"
           />