diff --git a/frontend/src/tools/kalkulator3d.jsx b/frontend/src/tools/kalkulator3d.jsx
index 03b7544..70845b4 100644
--- a/frontend/src/tools/kalkulator3d.jsx
+++ b/frontend/src/tools/kalkulator3d.jsx
@@ -121,7 +121,7 @@ function ImageModal({ src, onClose }) {
 }
 
 // ── Kostenrechner ─────────────────────────────────────────────────────────────
-export default function Kalkulator3D({ toast, editData, onEditDone, mobile }) {
+export default function Kalkulator3D({ toast, editData, onEditDone, mobile, setActive }) {
   const [gramm,   setGramm]   = useState(editData?.gramm   ?? 50);
   const [stunden, setStunden] = useState(editData?.stunden ?? 3);
   const [farben,  setFarben]  = useState(editData?.farben  ?? 1);
@@ -183,6 +183,7 @@ export default function Kalkulator3D({ toast, editData, onEditDone, mobile }) {
       } else {
         await api('/tools/kalkulator3d', { body:payload });
         toast('Gespeichert ✓'); setName(''); setBemerkung(''); setImage(null);
+        setActive?.('kalkulator3d-saved');
       }
     } catch(e) { toast(e.message, 'error'); } finally { setSaving(false); }
   };