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+# ERPAuto 配置系统架构分析
+
+## 1. 概述
+
+ERPAuto 是一个基于 Electron 的桌面应用程序，采用多层次配置管理系统来支持 ERP 系统自动化数据处理。配置系统采用 `.env` 文件作为持久化存储，通过 `ConfigManager` 统一管理，支持运行时动态修改和持久化保存。
+
+## 2. 配置系统整体架构
+
+```mermaid
+graph TB
+    subgraph "配置数据源"
+        ENV[.env 文件]
+        ENV_EXAMPLE[.env.example 模板]
+        CACHE[内存缓存 ConfigCache]
+    end
+
+    subgraph "配置管理层 ConfigManager"
+        CM_LOAD[loadEnvFile]
+        CM_GET[get/getBoolean/getNumber]
+        CM_SET[set]
+        CM_SAVE[save/saveAllSettings]
+        CM_PARTIAL[savePartialSettings]
+        CM_MERGE[deepMerge 深度合并]
+    end
+
+    subgraph "IPC 通信层"
+        SETTINGS_HANDLER[settings-handler.ts]
+        IPC_GET[settings:getSettings]
+        IPC_SAVE[settings:saveSettings]
+        IPC_TEST[settings:testErpConnection/testDbConnection]
+    end
+
+    subgraph "业务服务层"
+        ERP_SVC[ERP 服务]
+        DB_SVC[数据库服务]
+        USER_SVC[用户服务]
+        EXTRACTOR[ExtractorService]
+        CLEANER[CleanerService]
+    end
+
+    subgraph "UI 呈现层"
+        SETTINGS_UI[设置界面]
+        LOGIN_UI[登录界面]
+        MAIN_UI[主界面]
+    end
+
+    ENV -->|读取 | CM_LOAD
+    ENV_EXAMPLE -.->|模板参考 | ENV
+    CM_LOAD -->|填充 | CACHE
+    CACHE --> CM_GET
+    CM_SET --> CACHE
+    CM_PARTIAL --> CM_MERGE --> CM_SAVE --> ENV
+
+    CM_GET --> SETTINGS_HANDLER
+    SETTINGS_HANDLER --> IPC_GET
+    SETTINGS_HANDLER --> IPC_SAVE
+    SETTINGS_HANDLER --> IPC_TEST
+
+    IPC_GET --> SETTINGS_UI
+    IPC_SAVE --> SETTINGS_UI
+    IPC_TEST --> SETTINGS_UI
+
+    CACHE --> ERP_SVC
+    CACHE --> DB_SVC
+    CACHE --> USER_SVC
+    CACHE --> EXTRACTOR
+    CACHE --> CLEANER
+
+    SETTINGS_UI --> MAIN_UI
+    LOGIN_UI --> USER_SVC
+```
+
+## 3. 配置文件结构
+
+### 3.1 .env 文件组织
+
+```mermaid
+graph LR
+    subgraph "ERP 系统配置"
+        ERP_URL[ERP_URL]
+        ERP_USER[ERP_USERNAME]
+        ERP_PASS[ERP_PASSWORD]
+        ERP_HEADLESS[ERP_HEADLESS]
+        ERP_HTTPS[ERP_IGNORE_HTTPS_ERRORS]
+        ERP_CLOSE[ERP_AUTO_CLOSE_BROWSER]
+    end
+
+    subgraph "数据库配置 - SQL Server"
+        SQL_DRIVER[DB_SQLSERVER_DRIVER]
+        SQL_TRUST[DB_TRUST_SERVER_CERTIFICATE]
+    end
+
+    subgraph "数据库配置 - MySQL"
+        DB_TYPE[DB_TYPE]
+        DB_NAME[DB_NAME]
+        DB_USER[DB_USERNAME]
+        DB_PASS[DB_PASSWORD]
+        MYSQL_HOST[DB_MYSQL_HOST]
+        MYSQL_PORT[DB_MYSQL_PORT]
+        MYSQL_CHARSET[DB_MYSQL_CHARSET]
+    end
+
+    subgraph "订单号解析表配置"
+        TABLE_NAME[DB_TABLE_NAME]
+        FIELD_PROD_ID[DB_FIELD_PRODUCTION_ID]
+        FIELD_ORDER[DB_FIELD_ORDER_NUMBER]
+    end
+
+    subgraph "路径配置"
+        DATA_DIR[PATH_DATA_DIR]
+        PROD_ID_FILE[PATH_PRODUCTION_ID_FILE]
+        DEFAULT_OUT[PATH_DEFAULT_OUTPUT]
+        VALID_OUT[PATH_VALIDATION_OUTPUT]
+    end
+
+    subgraph "数据提取配置"
+        BATCH_SIZE[EXTRACTION_BATCH_SIZE]
+        VERBOSE[EXTRACTION_VERBOSE]
+        AUTO_CONVERT[EXTRACTION_AUTO_CONVERT]
+        MERGE_BATCHES[EXTRACTION_MERGE_BATCHES]
+        DB_PERSIST[EXTRACTION_ENABLE_DB_PERSISTENCE]
+    end
+
+    subgraph "校验配置"
+        DATA_SOURCE[VALIDATION_DATA_SOURCE]
+        USE_DB[VALIDATION_USE_DATABASE]
+        VAL_BATCH[VALIDATION_BATCH_SIZE]
+        ENABLE_CRUD[VALIDATION_ENABLE_CRUD]
+        DEFAULT_MGR[VALIDATION_DEFAULT_MANAGER]
+        MATCH_MODE[VALIDATION_MATCH_MODE]
+    end
+
+    subgraph "UI 配置"
+        FONT_FAMILY[UI_FONT_FAMILY]
+        FONT_SIZE[UI_FONT_SIZE]
+        INPUT_WIDTH[UI_PRODUCTION_ID_INPUT_WIDTH]
+    end
+
+    subgraph "执行配置"
+        DRY_RUN[EXECUTION_DRYRUN]
+    end
+```
+
+### 3.2 默认配置值
+
+| 配置类别   | 配置项            | 默认值                      | 说明                 |
+| ---------- | ----------------- | --------------------------- | -------------------- |
+| ERP        | url               | `https://68.11.34.30:8082/` | ERP 系统地址         |
+| ERP        | headless          | `true`                      | 无头浏览器模式       |
+| ERP        | ignoreHttpsErrors | `true`                      | 忽略 HTTPS 证书错误  |
+| ERP        | autoCloseBrowser  | `true`                      | 操作后自动关闭浏览器 |
+| Database   | dbType            | `mysql`                     | 数据库类型           |
+| Database   | mysqlHost         | `192.168.31.83`             | MySQL 主机地址       |
+| Database   | mysqlPort         | `3306`                      | MySQL 端口           |
+| Database   | database          | `BLD_DB`                    | 数据库名             |
+| Database   | username          | `remote_user`               | 数据库用户名         |
+| Paths      | dataDir           | `D:/python/playwrite/data/` | 数据目录             |
+| Extraction | batchSize         | `100`                       | 批次大小             |
+| Extraction | verbose           | `true`                      | 详细日志             |
+| Validation | dataSource        | `database_full`             | 校验数据源           |
+| Validation | batchSize         | `2000`                      | 校验批次大小         |
+| Validation | matchMode         | `substring`                 | 匹配模式             |
+| UI         | fontFamily        | `Microsoft YaHei UI`        | 字体                 |
+| UI         | fontSize          | `10`                        | 字体大小             |
+| Execution  | dryRun            | `false`                     | 干运行模式           |
+
+## 4. ConfigManager 核心类设计
+
+### 4.1 类结构与单例模式
+
+```mermaid
+classDiagram
+    class ConfigManager {
+        -static instance: ConfigManager | null
+        -envPath: string
+        -backupPath: string
+        -configCache: Map<string, string>
+        -initialized: boolean
+        +static getInstance(): ConfigManager
+        +initialize(): Promise<void>
+        +get(key: string): string | undefined
+        +getBoolean(key: string, default: boolean): boolean
+        +getNumber(key: string, default: number): number
+        +set(key: string, value: string|number|boolean): void
+        +save(): Promise<boolean>
+        +getAllSettings(): SettingsData
+        +saveAllSettings(settings: SettingsData): Promise<boolean>
+        +savePartialSettings(settings: Partial<SettingsData>): Promise<Object>
+        +resetToDefaults(): SettingsData
+        +getDefaultSettings(): SettingsData
+        -loadEnvFile(): Promise<void>
+        -backupEnvFile(): Promise<boolean>
+        -restoreBackup(): Promise<boolean>
+    }
+
+    class SettingsData {
+        +erp: ErpConfig
+        +database: DatabaseConfig
+        +paths: PathsConfig
+        +extraction: ExtractionConfig
+        +validation: ValidationConfig
+        +ui: UiConfig
+        +execution: ExecutionConfig
+    }
+
+    ConfigManager --> SettingsData: 返回/接收
+```
+
+### 4.2 核心方法流程图
+
+```mermaid
+sequenceDiagram
+    participant Client as 客户端/IPC
+    participant CM as ConfigManager
+    participant Cache as ConfigCache
+    participant FS as 文件系统
+    participant Backup as Backup 文件
+
+    Client->>CM: savePartialSettings(settings)
+    activate CM
+
+    CM->>CM: validateEditableFields()
+    alt 包含非白名单字段
+        CM-->>Client: 返回错误 (不允许修改)
+    else 验证通过
+        CM->>FS: loadEnvFile()
+        FS-->>Cache: 填充缓存
+        CM->>CM: getAllSettings()
+        CM->>Cache: 读取当前配置
+        CM->>CM: deepMerge(current, settings)
+
+        CM->>FS: backupEnvFile()
+        FS-->>Backup: 创建备份
+
+        CM->>FS: saveAllSettings(merged)
+        alt 保存成功
+            FS-->>Cache: 重新加载
+            CM-->>Client: 返回成功
+        else 保存失败
+            CM->>FS: restoreBackup()
+            FS-->>Cache: 恢复配置
+            CM-->>Client: 返回错误
+        end
+    end
+    deactivate CM
+```
+
+### 4.3 深度合并算法
+
+```mermaid
+graph TD
+    A[deepMerge 函数] --> B{遍历 target 键值对}
+    B --> C{targetValue 是对象？}
+    C -->|是 | D{sourceValue 也是对象？}
+    D -->|是 | E[递归调用 deepMerge]
+    D -->|否 | F[直接使用 targetValue]
+    C -->|否 | G{targetValue !== undefined?}
+    G -->|是 | H[更新该键值]
+    G -->|否 | I[跳过该键]
+    E --> J[合并结果存入 result]
+    F --> J
+    H --> J
+    B --> K[遍历完成]
+    K --> L[返回合并后的对象]
+```
+
+## 5. 配置读取与使用模式
+
+### 5.1 环境变量直接读取模式
+
+各业务服务通过 `process.env` 直接读取配置：
+
+```mermaid
+graph LR
+    subgraph "环境变量读取点"
+        MAIN[main/index.ts<br/>dotenv.config]
+    end
+
+    subgraph "服务模块"
+        DB_INDEX[database/index.ts]
+        DB_MYSQL[database/mysql.ts]
+        DB_SQL[database/sql-server.ts]
+        BIP_DAO[bip-users-dao.ts]
+        ORDER_RES[order-resolver.ts]
+        EXTRACTOR[extractor-handler.ts]
+        CLEANER[cleaner-handler.ts]
+        VALIDATION[validation-handler.ts]
+    end
+
+    MAIN -->|初始化加载 | ENV[process.env]
+
+    ENV --> DB_INDEX
+    ENV --> DB_MYSQL
+    ENV --> DB_SQL
+    ENV --> BIP_DAO
+    ENV --> ORDER_RES
+    ENV --> EXTRACTOR
+    ENV --> CLEANER
+    ENV --> VALIDATION
+```
+
+### 5.2 ConfigManager 获取模式
+
+通过 IPC 层统一获取：
+
+```mermaid
+sequenceDiagram
+    participant UI as 设置界面
+    participant Preload as Preload 脚本
+    participant IPC as IPC Handler
+    participant CM as ConfigManager
+
+    UI->>Preload: window.api.settings.getSettings()
+    Preload->>IPC: ipcRenderer.invoke('settings:getSettings')
+    IPC->>IPC: SessionManager.getUserType()
+    IPC->>CM: getAllSettings()
+    CM->>IPC: SettingsData
+    IPC->>IPC: filterSettingsByUserType()
+    IPC-->>Preload: 过滤后的 SettingsData
+    Preload-->>UI: SettingsData
+```
+
+### 5.3 数据库配置工厂模式
+
+```mermaid
+graph TB
+    subgraph "配置创建"
+        GET_TYPE[getDatabaseType] -->|DB_TYPE env| TYPE_CHECK{数据库类型}
+        TYPE_CHECK -->|mysql| CREATE_MYSQL[createMySqlConfig]
+        TYPE_CHECK -->|sqlserver| CREATE_SQL[createSqlServerConfig]
+    end
+
+    subgraph "服务创建"
+        CREATE_MYSQL --> MYSQL_SVC[MySqlService]
+        CREATE_SQL --> SQL_SVC[SqlServerService]
+    end
+
+    subgraph "单例缓存"
+        MYSQL_SVC --> CACHE[instances Map]
+        SQL_SVC --> CACHE
+        CACHE -->|返回已连接实例 | CLIENT[调用方]
+    end
+
+    CREATE_MYSQL --> CONNECT_MYSQL[service.connect]
+    CREATE_SQL --> CONNECT_SQL[service.connect]
+
+    CONNECT_MYSQL --> CACHE
+    CONNECT_SQL --> CACHE
+```
+
+## 6. 用户权限与配置访问控制
+
+### 6.1 用户类型与权限
+
+```mermaid
+graph TB
+    subgraph "用户类型 UserType"
+        ADMIN[Admin<br/>管理员]
+        USER[User<br/>普通用户]
+        GUEST[Guest<br/>访客]
+    end
+
+    subgraph "配置访问权限"
+        ADMIN_SETTINGS[全部配置可访问<br/>可修改 ERP 配置<br/>可恢复默认设置]
+        USER_SETTINGS[有限配置访问<br/>可修改 ERP 配置<br/>可查看执行配置]
+        GUEST_SETTINGS[只读访问]
+    end
+
+    ADMIN --> ADMIN_SETTINGS
+    USER --> USER_SETTINGS
+    GUEST --> GUEST_SETTINGS
+
+    subgraph "SessionManager 会话管理"
+        SM_LOGIN[login]
+        SM_SILENT[loginByComputerName]
+        SM_SWITCH[switchUser - Admin only]
+        SM_GET[getUserType/getUserInfo]
+    end
+
+    SM_LOGIN --> USER
+    SM_SILENT --> USER
+    SM_SWITCH --> USER
+```
+
+### 6.2 配置过滤机制
+
+```mermaid
+flowchart TD
+    A[getSettings 请求] --> B[获取当前用户类型]
+    B --> C{用户类型判断}
+
+    C -->|Admin| D[返回全部配置]
+
+    C -->|User| E[过滤配置]
+    E --> F[返回 ERP 配置<br/>username/password/headless/url/...<br/>paths 配置<br/>execution 配置<br/>最小化其他配置]
+
+    C -->|Guest| G[返回空配置或只读配置]
+
+    D --> H[返回给 UI]
+    E --> H
+    G --> H
+```
+
+## 7. 配置修改白名单机制
+
+### 7.1 可编辑字段白名单
+
+```javascript
+const UI_EDITABLE_FIELDS: string[] = [
+  'erp.url',
+  'erp.username',
+  'erp.password'
+  // 可根据需要扩展
+]
+```
+
+### 7.2 白名单验证流程
+
+```mermaid
+flowchart TD
+    A[savePartialSettings 调用] --> B[遍历 settings 中的字段]
+    B --> C[构建字段路径 section.field]
+    C --> D{字段在白名单中？}
+    D -->|否 | E[添加到 invalidFields]
+    D -->|是 | F[继续检查下一字段]
+    E --> B
+    F --> B
+    B --> G{所有字段检查完成}
+    G --> H{invalidFields 为空？}
+    H -->|否 | I[返回错误<br/>包含不允许修改的字段]
+    H -->|是 | J[继续保存流程]
+```
+
+## 8. 数据库配置详解
+
+### 8.1 双数据库支持架构
+
+```mermaid
+graph TB
+    subgraph "数据库抽象层"
+        IDB[IDatabaseService 接口<br/>connect/disconnect<br/>query/transaction<br/>isConnected]
+    end
+
+    subgraph "MySQL 实现"
+        MYSQL[MySqlService<br/>mysql2/promise<br/>createConnection<br/>execute/transaction]
+    end
+
+    subgraph "SQL Server 实现"
+        MSSQL[SqlServerService<br/>mssql<br/>ConnectionPool<br/>request.query<br/>Transaction]
+    end
+
+    IDB -.->|实现 | MYSQL
+    IDB -.->|实现 | MSSQL
+
+    MYSQL --> ENV_MYSQL[DB_MYSQL_HOST<br/>DB_MYSQL_PORT<br/>DB_NAME<br/>DB_USERNAME<br/>DB_PASSWORD]
+    MSSQL --> ENV_MSSQL[DB_SERVER<br/>DB_SQLSERVER_PORT<br/>DB_NAME<br/>DB_USERNAME<br/>DB_PASSWORD<br/>DB_TRUST_SERVER_CERTIFICATE]
+```
+
+### 8.2 数据库配置参数映射
+
+| 环境变量                    | MySQL 用途  | SQL Server 用途   |
+| --------------------------- | ----------- | ----------------- |
+| DB_TYPE                     | mysql       | sqlserver/mssql   |
+| DB_NAME                     | 数据库名    | 数据库名          |
+| DB_USERNAME                 | 用户名      | 用户名            |
+| DB_PASSWORD                 | 密码        | 密码              |
+| DB_MYSQL_HOST               | 主机地址    | -                 |
+| DB_MYSQL_PORT               | 端口 (3306) | -                 |
+| DB_SERVER                   | -           | 服务器地址        |
+| DB_SQLSERVER_PORT           | -           | 端口 (1433)       |
+| DB_TRUST_SERVER_CERTIFICATE | -           | 信任证书 (yes/no) |
+
+## 9. ERP 配置与浏览器自动化
+
+### 9.1 ERP 认证配置流程
+
+```mermaid
+sequenceDiagram
+    participant UI as 设置界面
+    participant IPC as settings-handler
+    participant CM as ConfigManager
+    participant ERP_AUTH as ErpAuthService
+    participant PW as Playwright
+
+    UI->>IPC: testErpConnection
+    IPC->>CM: getAllSettings
+    CM-->>IPC: SettingsData(含 erp 配置)
+
+    IPC->>ERP_AUTH: new ErpAuthService(erpConfig)
+    ERP_AUTH->>PW: chromium.launch
+    Note over PW: headless=erpConfig.headless<br/>args=[--ignore-certificate-errors]
+
+    PW-->>ERP_AUTH: Browser Context
+
+    ERP_AUTH->>PW: page.goto(loginUrl)
+    PW-->>ERP_AUTH: 加载登录页面
+
+    ERP_AUTH->>PW: fill username/password
+    ERP_AUTH->>PW: click login button
+
+    PW-->>ERP_AUTH: 登录成功
+
+    ERP_AUTH-->>IPC: ErpSession
+    IPC-->>UI: {success: true}
+
+    ERP_AUTH->>PW: close
+```
+
+### 9.2 ERP 配置项说明
+
+| 配置项            | 类型    | 默认值 | 说明           |
+| ----------------- | ------- | ------ | -------------- |
+| url               | string  | -      | ERP 系统 URL   |
+| username          | string  | -      | ERP 用户名     |
+| password          | string  | -      | ERP 密码       |
+| headless          | boolean | true   | 无头模式       |
+| ignoreHttpsErrors | boolean | true   | 忽略 SSL 错误  |
+| autoCloseBrowser  | boolean | true   | 自动关闭浏览器 |
+
+## 10. 订单号解析表配置
+
+### 10.1 配置结构
+
+```mermaid
+graph LR
+    subgraph "订单号解析配置"
+        TABLE[DB_TABLE_NAME<br/>表名]
+        FIELD_ID[DB_FIELD_PRODUCTION_ID<br/>总排号字段]
+        FIELD_ORDER[DB_FIELD_ORDER_NUMBER<br/>生产订单号字段]
+    end
+
+    TABLE --> ORDER_RESOLVER[OrderResolverService]
+    FIELD_ID --> ORDER_RESOLVER
+    FIELD_ORDER --> ORDER_RESOLVER
+
+    ORDER_RESOLVER --> DB_QUERY[查询映射关系]
+    DB_QUERY --> PRODUCTION_ID[productionID]
+    DB_QUERY --> ORDER_NUMBER[生产订单号]
+```
+
+### 10.2 默认配置示例
+
+```env
+DB_TABLE_NAME=productionContractData_26 年压力表合同数据
+DB_FIELD_PRODUCTION_ID=总排号
+DB_FIELD_ORDER_NUMBER=生产订单号
+```
+
+## 11. 配置持久化与备份机制
+
+### 11.1 保存流程
+
+```mermaid
+flowchart TD
+    A[saveAllSettings] --> B[设置写入 configCache]
+    B --> C[构建.env 文件内容]
+    C --> D[按分类组织配置<br/>ERP/数据库/路径/提取/校验/UI/执行]
+    D --> E[写入.env 文件]
+    E --> F{写入成功？}
+    F -->|是 | G[返回 true]
+    F -->|否 | H[返回 false]
+```
+
+### 11.2 备份与恢复流程
+
+```mermaid
+sequenceDiagram
+    participant Caller as 调用方
+    participant CM as ConfigManager
+    participant ENV as .env
+    participant BAK as .env.backup
+
+    Caller->>CM: savePartialSettings
+    CM->>CM: validateEditableFields
+
+    CM->>ENV: loadEnvFile
+    CM->>CM: deepMerge 合并配置
+
+    CM->>ENV: backupEnvFile
+    ENV->>BAK: copyFileSync
+
+    CM->>ENV: writeFileSync 新配置
+    ENV-->>CM: 保存结果
+
+    alt 保存成功
+        CM->>ENV: loadEnvFile 重新加载
+        CM-->>Caller: success: true
+    else 保存失败
+        CM->>BAK: restoreBackup
+        BAK->>ENV: copyFileSync 恢复
+        CM->>ENV: loadEnvFile
+        CM-->>Caller: success: false + error
+    end
+```
+
+## 12. 配置系统初始化时序
+
+```mermaid
+sequenceDiagram
+    participant App as Electron App
+    participant Main as main/index.ts
+    participant Dotenv as dotenv
+    participant CM as ConfigManager
+    participant IPC as registerIpcHandlers
+    participant SM as SessionManager
+
+    App->>Main: 应用启动
+    Main->>Dotenv: config .env
+    Dotenv-->>Main: process.env 已加载
+
+    Main->>IPC: registerIpcHandlers
+    Note over IPC: 注册所有 IPC 处理器<br/>settings/extractor/cleaner/auth...
+
+    App->>Main: app.whenReady
+    Main->>SM: silent login 尝试
+    SM->>SM: loginByComputerName
+
+    alt 静默登录成功
+        SM-->>Main: 用户已认证
+    else 静默登录失败
+        Main->>Main: 显示登录对话框
+    end
+
+    Main->>CM: initialize 按需加载
+```
+
+## 13. 关键代码模式
+
+### 13.1 环境变量读取模式
+
+```typescript
+// 直接读取 process.env
+const dbType = process.env.DB_TYPE?.toLowerCase()
+const mysqlHost = process.env.DB_MYSQL_HOST || 'localhost'
+const mysqlPort = parseInt(process.env.DB_MYSQL_PORT || '3306', 10)
+```
+
+### 13.2 ConfigManager 读取模式
+
+```typescript
+// 通过 ConfigManager 获取结构化配置
+const configManager = ConfigManager.getInstance()
+const settings = configManager.getAllSettings()
+const erpUrl = settings.erp.url
+const batchSize = settings.extraction.batchSize
+```
+
+### 13.3 部分保存模式
+
+```typescript
+// 只更新允许修改的字段
+const result = await configManager.savePartialSettings({
+  erp: {
+    url: 'http://new-url.com',
+    username: 'newuser',
+    password: 'newpass'
+  }
+})
+```
+
+## 14. 配置类别与业务模块映射
+
+```mermaid
+graph TB
+    subgraph "配置类别"
+        ERP_CONF[ERP 配置]
+        DB_CONF[数据库配置]
+        PATH_CONF[路径配置]
+        EXTRACT_CONF[提取配置]
+        VALID_CONF[校验配置]
+        UI_CONF[UI 配置]
+        EXEC_CONF[执行配置]
+    end
+
+    subgraph "业务模块"
+        ERP_AUTH[ErpAuthService]
+        ERP_EXTRACT[ExtractorService]
+        ERP_CLEAN[CleanerService]
+        ERP_ORDER[OrderResolverService]
+        DB_MYSQL[MySqlService]
+        DB_SQL[SqlServerService]
+        DB_DAO[各种 DAO 类]
+        EXCEL[Excel Parser/Exporter]
+        UI[React 界面]
+    end
+
+    ERP_CONF --> ERP_AUTH
+    ERP_CONF --> ERP_EXTRACT
+    ERP_CONF --> ERP_CLEAN
+
+    DB_CONF --> DB_MYSQL
+    DB_CONF --> DB_SQL
+    DB_CONF --> DB_DAO
+
+    PATH_CONF --> EXCEL
+    PATH_CONF --> UI
+
+    EXTRACT_CONF --> ERP_EXTRACT
+    EXTRACT_CONF --> DB_DAO
+
+    VALID_CONF --> ERP_EXTRACT
+    VALID_CONF --> DB_DAO
+
+    UI_CONF --> UI
+
+    EXEC_CONF --> ERP_CLEAN
+```
+
+## 15. 配置系统特点总结
+
+### 15.1 优点
+
+1. **集中化管理**: ConfigManager 单例模式统一管理所有配置
+2. **类型安全**: TypeScript 类型定义确保配置结构正确
+3. **权限控制**: 基于用户类型的配置访问和修改权限控制
+4. **备份恢复**: 自动备份机制防止配置丢失
+5. **双数据库支持**: MySQL 和 SQL Server 灵活切换
+6. **部分更新**: deepMerge 支持配置部分字段更新
+
+### 15.2 可扩展性
+
+1. **新增配置项**: 在 `.env.example` 添加 → `DEFAULT_SETTINGS` 定义 → `SettingsData` 类型 → `save` 方法输出
+2. **新增用户权限**: 扩展 `UserType` → 更新 `filterSettingsByUserType` 逻辑
+3. **新增白名单字段**: 在 `UI_EDITABLE_FIELDS` 数组添加路径
+
+### 15.3 注意事项
+
+1. 修改配置后需要重新加载 `.env` 文件使 `process.env` 生效
+2. 非白名单字段只能通过 `saveAllSettings` 或 `resetToDefaults` 修改
+3. 数据库服务使用单例缓存，配置变更需重启应用或手动重连
+4. ERP 配置变更需重启浏览器才能生效