fix(landing): remove filter — restore robot face + eyes (logo on #0066FF naturally shows face)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ithiria894

demos/index.html

@@ -262,7 +262,7 @@ <h2>Integrate this afternoon</h2>
 <!-- Demos -->
 <section class="block" id="demos">
   <h2>Live in 6 verticals</h2>
-  <p class="lede">Each demo runs on the same npm package + a <code>&lt;script&gt;</code> tag. Click any card, then tap this icon <span style="display:inline-flex;align-items:center;justify-content:center;vertical-align:-12px;width:46px;height:40px;background:#0066FF;border-radius:13px;margin:0 6px;box-shadow:0 8px 20px -4px rgba(0,102,255,0.45), 0 2px 6px rgba(0,0,0,0.18);"><img src="/public/logo.png" width="36" height="36" alt="ChatbotLite launcher" style="object-fit:contain;filter:brightness(0) invert(1);"></span> in the bottom-right corner to try the bot.</p>
+  <p class="lede">Each demo runs on the same npm package + a <code>&lt;script&gt;</code> tag. Click any card, then tap this icon <span style="display:inline-flex;align-items:center;justify-content:center;vertical-align:-12px;width:46px;height:40px;background:#0066FF;border-radius:13px;margin:0 6px;box-shadow:0 8px 20px -4px rgba(0,102,255,0.45), 0 2px 6px rgba(0,0,0,0.18);"><img src="/public/logo.png" width="36" height="36" alt="ChatbotLite launcher" style="object-fit:contain;"></span> in the bottom-right corner to try the bot.</p>
   <div class="demos-grid">
     <a class="demo-card" href="/shopify-store/">
       <img src="/public/cards/coffee.jpg" alt="Coffee Shop" style="width:100%;height:160px;object-fit:cover;border-radius:12px;margin-bottom:10px;">