refactor(install): 优化安装脚本配置逻辑

- 提取 Nginx 检测为独立函数 isNginxInstalled
- 为 select 函数添加 defaultIndex 参数支持默认选项
- 数据库配置保留用户上次输入值作为默认值
- 运行环境和部署方式选择支持记忆上次配置

install/database.js

@@ -15,10 +15,12 @@ async function configureDatabase(cmdArgs) {
     config.dbType = 'sqlite';
     log.info('使用默认配置: 数据库类型 = sqlite');
   } else {
+    const defaultDbType = config.dbType || 'sqlite';
+    const defaultIndex = defaultDbType === 'mysql' ? 2 : 1;
     config.dbType = await select('选择数据库类型：', [
       { label: 'SQLite（零配置，适合开发/小规模）', value: 'sqlite' },
       { label: 'MySQL（生产环境推荐）', value: 'mysql' }
-    ]);
+    ], defaultIndex);
   }
 
   if (config.dbType === 'mysql') {
@@ -74,11 +76,11 @@ async function configureExistingMySQL() {
   console.log('\n' + colors.yellow + '请确保 MySQL 服务已启动并创建了数据库' + colors.reset);
   console.log(colors.gray + '创建数据库命令: CREATE DATABASE idc_management CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;' + colors.reset + '\n');
 
-  config.dbConfig.host = await ask('MySQL 主机地址', 'localhost');
-  config.dbConfig.port = await ask('MySQL 端口', '3306');
-  config.dbConfig.username = await ask('MySQL 用户名', 'root');
+  config.dbConfig.host = await ask('MySQL 主机地址', config.dbConfig.host || 'localhost');
+  config.dbConfig.port = await ask('MySQL 端口', config.dbConfig.port || '3306');
+  config.dbConfig.username = await ask('MySQL 用户名', config.dbConfig.username || 'root');
   config.dbConfig.password = await askPassword('MySQL 密码');
-  config.dbConfig.database = await ask('数据库名称', 'idc_management');
+  config.dbConfig.database = await ask('数据库名称', config.dbConfig.database || 'idc_management');
 }
 
 async function installMySQL() {

install/env-check.js

@@ -403,7 +403,7 @@ async function checkEnvironment() {
     }
   }
 
-  if (commandExists('nginx') || commandExists('nginx.exe')) {
+  if (isNginxInstalled()) {
     log.success('Nginx 已安装');
   } else {
     log.warning('未检测到 Nginx（可选，仅在使用Nginx部署时需要）');

install/nginx.js

@@ -311,17 +311,18 @@ async function configureServices(cmdArgs) {
     config.backendPort = '8000';
     log.info('使用默认配置: 后端端口 = 8000');
   } else {
-    config.backendPort = await ask('后端服务端口', '8000');
+    config.backendPort = await ask('后端服务端口', config.backendPort || '8000');
   }
 
   if (cmdArgs?.nonInteractive) {
     config.nodeEnv = 'production';
     log.info('使用默认配置: 运行环境 = production');
   } else {
+    const defaultEnvIndex = (config.nodeEnv || 'production') === 'development' ? 2 : 1;
     config.nodeEnv = await select('选择运行环境：', [
       { label: 'production（生产模式，性能优化，推荐正式部署）', value: 'production' },
       { label: 'development（开发模式，详细日志，便于调试）', value: 'development' }
-    ]);
+    ], defaultEnvIndex);
   }
 
   if (cmdArgs?.nonInteractive || cmdArgs?.skipNginx) {
@@ -329,10 +330,11 @@ async function configureServices(cmdArgs) {
     config.frontendPort = '3000';
     log.info('使用默认配置: 前端部署 = PM2 serve (端口 3000)');
   } else {
+    const defaultDeployIndex = (config.frontendDeploy || 'nginx') === 'pm2' ? 2 : 1;
     config.frontendDeploy = await select('前端部署方式：', [
       { label: 'Nginx（性能最优，推荐生产环境）', value: 'nginx' },
       { label: 'PM2 serve（简单快捷，无需额外安装）', value: 'pm2' }
-    ]);
+    ], defaultDeployIndex);
   }
 
   if (config.frontendDeploy === 'nginx') {
@@ -380,15 +382,15 @@ async function configureServices(cmdArgs) {
     }
 
     if (!cmdArgs?.nonInteractive) {
-      config.frontendPort = await ask('Nginx 监听端口', '80');
-      config.domain = await ask('域名（没有则填localhost）', 'localhost');
+      config.frontendPort = await ask('Nginx 监听端口', config.frontendPort || '80');
+      config.domain = await ask('域名（没有则填localhost）', config.domain || 'localhost');
     } else {
-      config.frontendPort = '80';
-      config.domain = 'localhost';
+      config.frontendPort = config.frontendPort || '80';
+      config.domain = config.domain || 'localhost';
     }
   } else {
     if (!cmdArgs?.nonInteractive) {
-      config.frontendPort = await ask('前端服务端口', '3000');
+      config.frontendPort = await ask('前端服务端口', config.frontendPort || '3000');
     }
   }
 

install/ui.js

@@ -77,14 +77,14 @@ function askPassword(question) {
   });
 }
 
-async function select(question, options) {
+async function select(question, options, defaultIndex = 1) {
   const { colors } = require('./logger');
   console.log(`\n${question}`);
   options.forEach((opt, idx) => {
     console.log(`  ${colors.cyan}${idx + 1}.${colors.reset} ${opt.label}`);
   });
 
-  const answer = await ask('请选择', '1');
+  const answer = await ask('请选择', String(defaultIndex));
   const index = parseInt(answer) - 1;
 
   return options[index]?.value || options[0].value;