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

redux/slices/authSlice.ts

@@ -2,7 +2,7 @@
 import { createSlice } from "@reduxjs/toolkit";
 
 const authSlice = createSlice({
-  name: "auth",
+  name: "authSlice",
   initialState: {
     isAdminLoggedIn: false,
     users: {