feat(redux): Rename all Redux slices and store keys to match file names for clarity

- Renamed all slice names (createSlice `name` attribute) to match their file names (e.g. loopChartSlice, authSlice, kueDataSlice etc.)
- Updated `store.ts` to register each reducer with consistent key names (e.g. state.loopChartSlice instead of state.loopChart)
- Adjusted all `useSelector` and Redux state accesses across the codebase
- Improves maintainability, searchability and consistency across files and Redux DevTools

components/main/uebersicht/VersionInfo.tsx

@@ -6,10 +6,10 @@ import { RootState } from "../../../redux/store";
 
 const VersionInfo: React.FC = () => {
   const appVersion =
-    useSelector((state: RootState) => state.systemSettings.appVersion) ||
+    useSelector((state: RootState) => state.systemSettingsSlice.appVersion) ||
     "Unbekannt";
   const webVersion = useSelector(
-    (state: RootState) => state.webVersion.version
+    (state: RootState) => state.webVersionSlice.version
   ); // Webversion aus Redux holen
 
   return (