diff --git a/backend/static/ui.js b/backend/static/ui.js
index fd03872..2e4471e 100644
--- a/backend/static/ui.js
+++ b/backend/static/ui.js
@@ -37,6 +37,12 @@ function el(tag, attrs = {}, children = []) {
   for (const [k, v] of Object.entries(attrs)) {
     if (k === "class") node.className = v;
     else if (k === "text") node.textContent = v;
+    else if (k.startsWith("on") && typeof v === "function") {
+      // Event handlers MUST be assigned as properties: setAttribute(k, fn)
+      // stringifies the function ("... => ...") and never binds a listener,
+      // which silently killed the Bearbeiten/Löschen buttons.
+      node[k] = v;
+    }
     else node.setAttribute(k, v);
   }
   for (const child of children) node.appendChild(child);