feat(install): 新增安装脚本模块化重构

install/health.js

@@ -0,0 +1,53 @@
+const { log } = require('./logger');
+const { config } = require('./config');
+
+function httpHealthCheck(host, port, path = '/health', timeout = 5000) {
+  return new Promise((resolve) => {
+    const http = require('http');
+    const req = http.get({ hostname: host, port, path, timeout }, (res) => {
+      let body = '';
+      res.on('data', (chunk) => { body += chunk; });
+      res.on('end', () => {
+        resolve({ success: res.statusCode >= 200 && res.statusCode < 400, statusCode: res.statusCode });
+      });
+    });
+    req.on('error', (err) => {
+      resolve({ success: false, error: err.message });
+    });
+    req.on('timeout', () => {
+      req.destroy();
+      resolve({ success: false, error: 'timeout' });
+    });
+  });
+}
+
+async function healthCheck() {
+  log.step('健康检查');
+  log.subStep('检查后端服务状态...');
+
+  const maxRetries = 5;
+  const retryDelay = 3000;
+
+  for (let i = 1; i <= maxRetries; i++) {
+    const result = await httpHealthCheck('localhost', parseInt(config.backendPort));
+
+    if (result.success) {
+      log.success('后端服务健康检查通过');
+      return { success: true };
+    }
+
+    const detail = result.statusCode ? `HTTP ${result.statusCode}` : (result.error || '无响应');
+    if (i < maxRetries) {
+      log.subStep(`第 ${i} 次检查失败 (${detail})，${retryDelay/1000}秒后重试...`);
+      await new Promise(resolve => setTimeout(resolve, retryDelay));
+    }
+  }
+
+  log.warning('健康检查未通过，请手动验证服务状态');
+  return { success: false };
+}
+
+module.exports = {
+  httpHealthCheck,
+  healthCheck,
+};