feat(onboarding): 添加新用户引导流程

实现了完整的应用引导功能，包括：
- 新增引导页面UI，包含健康数据追踪、轻断食计划和健康挑战三个介绍页面
- 添加引导状态持久化存储，使用AsyncStorage管理用户完成状态
- 修改应用启动逻辑，根据引导状态决定跳转到主页或引导页
- 在开发者选项中添加重置引导状态功能，方便测试
- 更新路由配置和存储键常量，统一管理引导相关配置

hooks/useAuthGuard.ts

@@ -5,7 +5,7 @@ import { Alert } from 'react-native';
 
 import { ROUTES } from '@/constants/Routes';
 import { useAppDispatch, useAppSelector } from '@/hooks/redux';
-import { api } from '@/services/api';
+import { STORAGE_KEYS, api } from '@/services/api';
 import { logout as logoutAction } from '@/store/userSlice';
 
 type RedirectParams = Record<string, string | number | boolean | undefined>;
@@ -99,7 +99,7 @@ export function useAuthGuard() {
       await api.delete('/api/users/delete-account');
 
       // 清除额外的本地数据
-      await AsyncStorage.multiRemove(['@user_personal_info', '@onboarding_completed']);
+      await AsyncStorage.multiRemove(['@user_personal_info', STORAGE_KEYS.onboardingCompleted]);
 
       // 执行退出登录逻辑
       await dispatch(logoutAction()).unwrap();
@@ -149,4 +149,3 @@ export function useAuthGuard() {
   } as const;
 }
 
-