fix: Unser Versprechen heller als Footer (navy-light vs navy)

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

vorschau/index.html

@@ -303,7 +303,7 @@
 
     <!-- Diagonal: -> Trust -->
     <div class="divider divider-diagonal-dark">
-        <svg viewBox="0 0 1440 60" preserveAspectRatio="none"><path d="M0,60 L1440,0 L1440,60 Z" fill="#0A1832"/></svg>
+        <svg viewBox="0 0 1440 60" preserveAspectRatio="none"><path d="M0,60 L1440,0 L1440,60 Z" fill="#132844"/></svg>
     </div>
 
     <!-- Trust / Unser Versprechen -->