Datei Upload und Download fix

frontend/css/knowledge.css

@@ -278,6 +278,22 @@
   margin-top: -2px;
 }
 
+.knowledge-entry-item.highlight {
+  animation: highlightPulse 2s ease-in-out;
+}
+
+@keyframes highlightPulse {
+  0%, 100% {
+    background-color: transparent;
+  }
+  25%, 75% {
+    background-color: var(--primary-100, rgba(59, 130, 246, 0.1));
+  }
+  50% {
+    background-color: var(--primary-200, rgba(59, 130, 246, 0.2));
+  }
+}
+
 /* Header (immer sichtbar) */
 .knowledge-entry-header {
   display: flex;