feat: add PolyGen AI logo

Author: Reg (Ceradon AI)

assets/polygen-logo.webp

@@ -73,7 +73,10 @@
         <div class="relative mx-auto max-w-7xl px-4 py-16">
           <div class="grid gap-12 lg:grid-cols-[3fr_2fr] lg:items-center">
             <div class="space-y-6">
-              <span class="tag">Polygen AI Platform</span>
+              <div class="flex items-center gap-4 mb-2">
+                <img src="./assets/polygen-logo.webp" alt="PolyGen AI logo" class="h-16 w-16 rounded-xl image-surface" width="512" height="512" />
+                <span class="tag">Polygen AI Platform</span>
+              </div>
               <h1 class="text-4xl sm:text-5xl font-bold text-[color:var(--white)]">Text-to-3D. Describe it, print it.</h1>
               <p class="text-lg text-subtle">Polygen AI transforms natural language descriptions into printable OpenSCAD code using a multi-agent AI pipeline. Powered by Google Gemini for planning and Anthropic Claude for code generation, with browser-based WASM validation.</p>
               <div class="flex flex-wrap gap-3">