feat: update homepage avatar image source and presentation

src/pages/index.astro

@@ -36,14 +36,12 @@ const links = [
         <!-- Header / Avatar -->
         <div>
           <div
-            class="w-32 aspect-[3/4] mb-8 overflow-hidden border border-black grayscale relative group"
+            class="w-48 mb-8 bg-gradient-to-br from-[#FFE4D9] to-[#FFD6CC] rounded-3xl overflow-hidden shadow-2xl shadow-rose-900/20"
           >
-            <!-- Grayscale Avatar -->
             <img
-              src="/emmanuel-bernard.webp"
+              src="https://cdn.avqn.ch/photos/manu/manu-left.webp"
               alt="Emmanuel Bernard"
-              class="w-full h-full object-cover"
-              onerror="this.src='https://ui-avatars.com/api/?name=Emmanuel+Bernard&background=random&size=256'"
+              class="w-full h-auto object-cover grayscale object-top mix-blend-multiply"
             />
           </div>