feat(membership): 重构会员系统架构并优化VIP卡片显示

- 创建独立的会员服务模块 services/membership.ts，统一管理会员计划元数据和工具函数
- 新增 membershipSlice Redux状态管理，集中处理会员数据和状态
- 重构个人中心VIP会员卡片，支持动态显示会员计划和有效期
- 优化会员购买弹窗，使用统一的会员计划配置
- 改进会员数据获取流程，确保状态同步和一致性

store/index.ts

@@ -5,6 +5,7 @@ import circumferenceReducer from './circumferenceSlice';
 import exerciseLibraryReducer from './exerciseLibrarySlice';
 import foodLibraryReducer from './foodLibrarySlice';
 import foodRecognitionReducer from './foodRecognitionSlice';
+import membershipReducer from './membershipSlice';
 import goalsReducer from './goalsSlice';
 import healthReducer from './healthSlice';
 import fastingReducer, {
@@ -108,6 +109,7 @@ export const store = configureStore({
     exerciseLibrary: exerciseLibraryReducer,
     foodLibrary: foodLibraryReducer,
     foodRecognition: foodRecognitionReducer,
+    membership: membershipReducer,
     workout: workoutReducer,
     water: waterReducer,
     fasting: fastingReducer,