feat(fasting): 新增轻断食功能模块

新增完整的轻断食功能，包括：
- 断食计划列表和详情页面，支持12-12、14-10、16-8、18-6四种计划
- 断食状态实时追踪和倒计时显示
- 自定义开始时间选择器
- 断食通知提醒功能
- Redux状态管理和数据持久化
- 新增tab导航入口和路由配置

store/index.ts

@@ -7,6 +7,7 @@ import foodLibraryReducer from './foodLibrarySlice';
 import foodRecognitionReducer from './foodRecognitionSlice';
 import goalsReducer from './goalsSlice';
 import healthReducer from './healthSlice';
+import fastingReducer from './fastingSlice';
 import moodReducer from './moodSlice';
 import nutritionReducer from './nutritionSlice';
 import scheduleExerciseReducer from './scheduleExerciseSlice';
@@ -62,6 +63,7 @@ export const store = configureStore({
     foodRecognition: foodRecognitionReducer,
     workout: workoutReducer,
     water: waterReducer,
+    fasting: fastingReducer,
   },
   middleware: (getDefaultMiddleware) =>
     getDefaultMiddleware().prepend(listenerMiddleware.middleware),
@@ -69,4 +71,3 @@ export const store = configureStore({
 
 export type RootState = ReturnType<typeof store.getState>;
 export type AppDispatch = typeof store.dispatch;
-