feat: 重构多语言模块，符合NestJS规范

- 重构LanguageUtils为LanguageService，实现ILanguageService接口
- 移除自定义验证管道和装饰器，使用标准NestJS验证
- 集成框架ValidatorService进行业务验证
- 简化目录结构，移除不必要的子目录
- 支持模块化语言包加载（common、user、order等）
- 统一API响应格式（code、msg、data、timestamp）
- 添加ValidationExceptionFilter处理多语言验证错误
- 完善多语言示例和文档

start-prod.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+echo "╔════════════════════════════════════════════════════════════════════════════╗"
+echo "║              🚀 启动生产环境（完整Docker部署）                               ║"
+echo "╚════════════════════════════════════════════════════════════════════════════╝"
+echo ""
+
+# 步骤1: 构建并启动所有服务
+echo "📦 步骤1: 构建并启动所有服务..."
+docker-compose up -d --build
+
+echo ""
+echo "⏳ 等待所有服务启动..."
+sleep 30
+
+# 步骤2: 检查服务状态
+echo ""
+echo "📊 服务状态:"
+docker-compose ps
+
+echo ""
+echo "📊 健康检查:"
+docker-compose exec nestjs-backend node -e "require('http').get('http://localhost:3000/health', (r) => {console.log('NestJS:', r.statusCode === 200 ? '✅ 健康' : '❌ 异常')})" 2>/dev/null || echo "NestJS: ⏳ 等待启动..."
+
+echo ""
+echo "✅ 所有服务已启动！"
+echo ""
+echo "🌐 访问地址:"
+echo "   Admin管理面板: http://localhost"
+echo "   NestJS API:    http://localhost:3000"
+echo "   MySQL:         localhost:3306"
+echo "   Redis:         localhost:6379"
+echo ""
+echo "📋 常用命令:"
+echo "   查看日志: docker-compose logs -f"
+echo "   停止服务: docker-compose down"
+echo "   重启服务: docker-compose restart"
+echo ""