fix: korrigierter Redux-State für activeMode im ChartSwitcher

- useSelector-Aufruf in ChartSwitcher.tsx angepasst, um den korrekten Redux-Slice (kueChartMode) zu verwenden.
- Fehler behoben: TypeError: Cannot read properties of undefined (reading 'activeMode').

redux/slices/kueChartModeSlice.ts

@@ -0,0 +1,23 @@
+// /redux/slices/kueChartModeSlice.ts
+import { createSlice, PayloadAction } from "@reduxjs/toolkit";
+
+interface KueChartModeState {
+  activeMode: "Schleife" | "TDR"; // 🔥 Neuer Zustand für den aktiven Modus
+}
+
+const initialState: KueChartModeState = {
+  activeMode: "Schleife", // Standard ist Schleife
+};
+
+export const kueChartModeSlice = createSlice({
+  name: "kueChartMode",
+  initialState,
+  reducers: {
+    setActiveMode: (state, action: PayloadAction<"Schleife" | "TDR">) => {
+      state.activeMode = action.payload; // 🔥 Speichert den Modus (Schleife oder TDR)
+    },
+  },
+});
+
+export const { setActiveMode } = kueChartModeSlice.actions;
+export default kueChartModeSlice.reducer;