feat; in KÜ Chart RSL und ISO start button

components/main/kabelueberwachung/kue705FO/Charts/IsoMeasurementChart/IsoChartActionBar.tsx

@@ -237,10 +237,14 @@ const IsoChartActionBar: React.FC = () => {
           </div>
         </Listbox>
 
-        {/* Label für Isolationswiderstand - kein Dropdown mehr nötig */}
-        <div className="px-3 py-1 bg-gray-50 border rounded text-sm text-gray-700">
-          Isolationswiderstand
-        </div>
+        {/* ISO starten button*/}
+        <button
+          onClick={handleFetchData}
+          className="px-4 py-1 bg-littwin-blue text-white rounded text-sm"
+          disabled={isLoading}
+        >
+          ISO starten
+        </button>
 
         <button
           onClick={handleFetchData}