feat: Add cursor wait during chart data loading

- Implemented cursor wait state while chart data is being loaded in `AnalogInputsChart.tsx`.
- Fixed missing dependencies in `useEffect` and defined `loading` state.
- Updated `handleFetchData` to manage

components/main/analogInputs/AnalogInputsChart.tsx

@@ -53,7 +53,7 @@ export default function AnalogInputsChart() {
   }, []);
 
   const dispatch = useDispatch<AppDispatch>();
-  const chartRef = useRef<any>(null);
+  const chartRef = useRef<Line>(null); // Specify Line type for chartRef
 
   // Redux Werte für Chart-Daten
   const { zeitraum, vonDatum, bisDatum, data, autoLoad, selectedId } =
@@ -114,10 +114,15 @@ export default function AnalogInputsChart() {
     setLocalBisDatum(to);
   };
 
+  // Define loading state
+  const [loading, setLoading] = React.useState(false);
+
   // ✅ Button → Redux + Fetch triggern
   const handleFetchData = () => {
     if (!selectedAnalogInput?.id) return;
 
+    setLoading(true); // Set loading to true when fetching data
+
     // Fallback auf Redux-Werte, falls lokale Werte leer sind
     const from = localVonDatum || vonDatumRedux || "";
     const to = localBisDatum || bisDatumRedux || "";
@@ -154,7 +159,7 @@ export default function AnalogInputsChart() {
         vonDatum: from,
         bisDatum: to,
       })
-    );
+    ).finally(() => setLoading(false)); // Reset loading after fetch
   };
 
   // Auto-trigger fetch when a row is selected and id is not 0 (only once per selection)
@@ -347,7 +352,7 @@ export default function AnalogInputsChart() {
   }, []);
 
   return (
-    <div className="flex flex-col gap-3">
+    <div className={`flex flex-col gap-3 ${loading ? "cursor-wait" : ""}`}>
       <div className="flex flex-wrap items-center gap-4 mb-2">
         {/* ✅ Neuer DatePicker mit schönem Styling (lokal, ohne Redux) */}
         <AnalogInputsDatePicker