update flow and auth model

README.md

@@ -44,8 +44,35 @@ Sentinel is a mobile application that helps users securely manage their digital
 - **Framework**: React Native (Expo SDK 52)
 - **Language**: TypeScript
 - **Navigation**: React Navigation (Bottom Tabs)
-- **Icons**: @expo/vector-icons (Feather, Ionicons, MaterialCommunityIcons, FontAwesome5)
+- **Icons**: @expo/vector-icons (Feather, Ionicons, FontAwesome5)
 - **Styling**: Custom nautical theme with gradients
+- **State Management**: React Context (AuthContext)
+- **Storage**: AsyncStorage for auth persistence
+
+## Configuration
+
+The application uses a centralized configuration file located at `src/config/index.ts`.
+
+### Key Configuration Options
+
+| Option | Description | Default |
+|--------|-------------|---------|
+| `NO_BACKEND_MODE` | Use mock data instead of real backend | `false` |
+| `DEBUG_MODE` | Enable API debug logging | `true` |
+| `API_BASE_URL` | Backend API server URL | `http://localhost:8000` |
+| `API_TIMEOUT` | Request timeout (ms) | `30000` |
+
+### API Endpoints
+
+All backend API routes are defined in `API_ENDPOINTS`:
+- **AUTH**: `/login`, `/register`
+- **ASSETS**: `/assets/get`, `/assets/create`, `/assets/claim`, `/assets/assign`
+- **AI**: `/ai/proxy`
+- **ADMIN**: `/admin/declare-guale`
+
+### Environment Setup
+
+For development, you may need to modify `API_BASE_URL` in the config file to match your backend server address.
 
 ## Project Structure
 
@@ -56,14 +83,27 @@ src/
 │       ├── BiometricModal.tsx
 │       ├── Icons.tsx
 │       └── VaultDoorAnimation.tsx
+├── config/
+│   └── index.ts          # Centralized configuration
+├── context/
+│   └── AuthContext.tsx   # Authentication state management
 ├── navigation/
-│   └── TabNavigator.tsx
+│   ├── AuthNavigator.tsx # Login/Register navigation
+│   └── TabNavigator.tsx  # Main app navigation
 ├── screens/
-│   ├── FlowScreen.tsx
+│   ├── FlowScreen.tsx    # AI chat interface
 │   ├── VaultScreen.tsx
 │   ├── SentinelScreen.tsx
 │   ├── HeritageScreen.tsx
-│   └── MeScreen.tsx
+│   ├── MeScreen.tsx
+│   ├── LoginScreen.tsx
+│   └── RegisterScreen.tsx
+├── services/
+│   ├── index.ts          # Service exports
+│   ├── ai.service.ts     # AI API integration
+│   ├── auth.service.ts   # Authentication API
+│   ├── assets.service.ts # Asset management API
+│   └── admin.service.ts  # Admin operations API
 ├── theme/
 │   └── colors.ts
 └── types/
@@ -80,6 +120,15 @@ assets/
     └── captain-avatar.svg  # Avatar placeholder
 ```
 
+## Services
+
+The application uses a modular service architecture for API communication:
+
+- **AuthService**: User authentication (login, register)
+- **AIService**: AI conversation proxy with support for text and image input
+- **AssetsService**: Digital asset management
+- **AdminService**: Administrative operations
+
 ## Icons & Branding
 
 The Sentinel brand uses a nautical anchor-and-star logo on a teal (#459E9E) background.
@@ -163,8 +212,44 @@ Sentinel 是一款帮助用户安全管理数字遗产的移动应用程序。
 - **框架**: React Native (Expo SDK 52)
 - **语言**: TypeScript
 - **导航**: React Navigation (底部标签)
-- **图标**: @expo/vector-icons
+- **图标**: @expo/vector-icons (Feather, Ionicons, FontAwesome5)
 - **样式**: 自定义航海主题配渐变
+- **状态管理**: React Context (AuthContext)
+- **存储**: AsyncStorage 用于认证持久化
+
+## 配置说明
+
+应用使用位于 `src/config/index.ts` 的集中配置文件。
+
+### 主要配置项
+
+| 选项 | 说明 | 默认值 |
+|------|------|--------|
+| `NO_BACKEND_MODE` | 使用模拟数据而非真实后端 | `false` |
+| `DEBUG_MODE` | 启用 API 调试日志 | `true` |
+| `API_BASE_URL` | 后端 API 服务器地址 | `http://localhost:8000` |
+| `API_TIMEOUT` | 请求超时时间（毫秒） | `30000` |
+
+### API 端点
+
+所有后端 API 路由定义在 `API_ENDPOINTS` 中：
+- **AUTH**: `/login`, `/register`
+- **ASSETS**: `/assets/get`, `/assets/create`, `/assets/claim`, `/assets/assign`
+- **AI**: `/ai/proxy`
+- **ADMIN**: `/admin/declare-guale`
+
+### 环境配置
+
+开发时，您可能需要修改配置文件中的 `API_BASE_URL` 以匹配您的后端服务器地址。
+
+## 服务层
+
+应用使用模块化的服务架构进行 API 通信：
+
+- **AuthService**: 用户认证（登录、注册）
+- **AIService**: AI 对话代理，支持文本和图片输入
+- **AssetsService**: 数字资产管理
+- **AdminService**: 管理员操作
 
 ## 运行项目