feat: replace ad placeholders with Yandex app referral banners

Leaderboard shows horizontal layout with logo, text and CTA button.
Tile/rectangle show vertical layout. All link to Yandex referral URL with rel=sponsored.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/AdBanner.astro

@@ -5,20 +5,54 @@ interface Props {
 
 const { size } = Astro.props;
 
+const href = 'https://redirect.appmetrica.yandex.com/serve/29835370459904648?clid=15006577&appmetrica_js_redirect=0';
+
 const specs = {
-  leaderboard: { label: '728 × 90',  class: 'w-full h-[90px]' },
-  rectangle:   { label: '300 × 250', class: 'w-full max-w-[300px] h-[250px]' },
-  tile:        { label: '300 × 250', class: 'w-full h-[250px]' },
+  leaderboard: { class: 'w-full h-[90px]',              horizontal: true  },
+  rectangle:   { class: 'w-full max-w-[300px] h-[250px]', horizontal: false },
+  tile:        { class: 'w-full h-[250px]',              horizontal: false },
 };
 
-const { label, class: sizeClass } = specs[size];
+const { class: sizeClass, horizontal } = specs[size];
 ---
 
-<aside aria-label="Advertisement">
-  <div
-    class={`${sizeClass} flex flex-col items-center justify-center gap-1 rounded-xl border border-dashed border-zinc-800 bg-zinc-900/30`}
+<aside aria-label="Реклама">
+  <a
+    href={href}
+    target="_blank"
+    rel="noopener sponsored"
+    class={`${sizeClass} flex ${horizontal ? 'flex-row items-center gap-4 px-6' : 'flex-col items-center justify-center gap-3 px-4'} rounded-xl border border-zinc-800 bg-zinc-900/50 hover:border-[#534AB7]/50 hover:bg-zinc-900 transition-colors duration-200 group`}
   >
-    <span class="text-[10px] font-medium uppercase tracking-widest text-zinc-600">Advertisement</span>
-    <span class="text-[11px] tabular-nums text-zinc-700">{label}</span>
-  </div>
+    <!-- Yandex logo -->
+    <svg class="shrink-0 text-[#FC3F1D]" width={horizontal ? '32' : '40'} height={horizontal ? '32' : '40'} viewBox="0 0 40 40" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true">
+      <circle cx="20" cy="20" r="20" fill="currentColor"/>
+      <path d="M22.44 10H19.1c-3.78 0-6.1 2.02-6.1 5.32 0 2.66 1.26 4.24 3.64 5.8L13.5 30h3.38l3.4-8.38-.96-.58c-1.84-1.12-2.72-2.08-2.72-3.92 0-1.94 1.3-3.08 3.44-3.08h1.4V30h3V10z" fill="white"/>
+    </svg>
+
+    {horizontal ? (
+      <div class="flex-1 min-w-0">
+        <div class="text-xs font-medium text-zinc-500 uppercase tracking-widest mb-0.5">Реклама</div>
+        <div class="text-sm font-semibold text-zinc-100 group-hover:text-[#534AB7] transition-colors leading-tight">
+          Яндекс с Алисой — скачать бесплатно
+        </div>
+        <div class="text-xs text-zinc-500 mt-0.5">Голосовой ИИ-помощник для Android и iOS</div>
+      </div>
+      <span class="shrink-0 text-xs font-semibold text-white bg-[#FC3F1D] px-3 py-1.5 rounded-lg group-hover:bg-[#e03518] transition-colors whitespace-nowrap">
+        Установить
+      </span>
+    ) : (
+      <>
+        <div class="text-center">
+          <div class="text-xs font-medium text-zinc-500 uppercase tracking-widest mb-2">Реклама</div>
+          <div class="text-base font-semibold text-zinc-100 group-hover:text-[#534AB7] transition-colors leading-snug">
+            Яндекс с Алисой
+          </div>
+          <div class="text-xs text-zinc-500 mt-1">Голосовой ИИ-помощник</div>
+        </div>
+        <span class="text-xs font-semibold text-white bg-[#FC3F1D] px-4 py-2 rounded-lg group-hover:bg-[#e03518] transition-colors">
+          Установить бесплатно
+        </span>
+      </>
+    )}
+  </a>
 </aside>