docs: ✏️ 新增了一段注释

src/store/index.js

@@ -1,3 +1,23 @@
+// 古老写法
+// // 1. 导入原始 Redux 的核心函数
+// import { createStore, combineReducers } from 'redux';
+// // 2. 导入 reducers（保持不变）
+// import loadingReducer from "./slices/loadingSlice";
+// import studentReducer from "./slices/studentSlice";
+
+// // 3. 合并 reducers
+// const rootReducer = combineReducers({
+//   loading: loadingReducer,
+//   student: studentReducer,
+// });
+
+// // 4. 创建 store（原始 Redux 方式）
+// export default createStore(
+//   rootReducer,
+//   // 可选：添加 Redux DevTools 支持
+//   window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__()
+// );
+
 import { configureStore } from "@reduxjs/toolkit";
 import loadingReducer from "./slices/loadingSlice";
 import studentReducer from "./slices/studentSlice";