style: alle font-family auf Poppins umgestellt

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

js/collection.js

@@ -326,7 +326,7 @@ function makeSwatch(hsl) {
   swatch.title = hex;
 
   const label = document.createElement('span');
-  label.style.cssText = 'font-size:0.75rem;font-family:monospace';
+  label.style.cssText = 'font-size:0.75rem;font-family:Poppins,sans-serif';
   label.textContent = hex;
 
   wrapper.appendChild(swatch);