feat: 重构前后端架构，添加Go后端和Python Agent服务

- 新增 Go 语言后端服务(server/)，包含用户认证、Agent管理、数据库连接等API
- 新增 Python Agent 服务(agent/)，实现Agent核心逻辑和工具集
- 前端从原生HTML迁移到Vue.js框架(web/src/)
- 添加 Docker Compose 支持(docker-compose.yml)
- 添加项目架构文档(docs/ARCHITECTURE.md)
- 添加环境变量示例(.env.example)和本地启动脚本(start-local.ps1)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/cmd/api/main.go

@@ -0,0 +1,162 @@
+package main
+
+import (
+	"bytes"
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"time"
+	"x-agents/server/internal/config"
+	"x-agents/server/internal/handler"
+	"x-agents/server/internal/model"
+	"x-agents/server/internal/repository"
+	"x-agents/server/internal/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+// Logger 日志记录器
+type Logger struct {
+	successLog *log.Logger
+	errorLog   *log.Logger
+}
+
+func NewLogger() *Logger {
+	// 创建日志目录
+	today := time.Now().Format("2006-01-02")
+	logDir := filepath.Join("logs", today)
+	os.MkdirAll(logDir, 0755)
+
+	// 成功日志
+	successFile, _ := os.OpenFile(filepath.Join(logDir, "success.log"), os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+	successLogger := log.New(successFile, "", log.Ldate|log.Ltime|log.Lshortfile)
+
+	// 错误日志
+	errorFile, _ := os.OpenFile(filepath.Join(logDir, "failure.log"), os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+	errorLogger := log.New(errorFile, "", log.Ldate|log.Ltime|log.Lshortfile)
+
+	return &Logger{
+		successLog: successLogger,
+		errorLog:   errorLogger,
+	}
+}
+
+// LogRequest 记录请求
+func (l *Logger) LogRequest(method, path, body string, status int, duration time.Duration) {
+	entry := "[%s] %s %s %d %v"
+
+	if status >= 400 {
+		l.errorLog.Printf(entry, method, path, body, status, duration)
+	} else {
+		l.successLog.Printf(entry, method, path, body, status, duration)
+	}
+}
+
+var logger *Logger
+
+func main() {
+	// 初始化日志
+	logger = NewLogger()
+
+	// 1. 加载配置
+	cfg := config.Load()
+	log.Printf("=== Server starting, port=%s ===", cfg.Port)
+
+	// 2. 初始化数据库
+	db, err := config.InitDB(cfg)
+	if err != nil {
+		log.Fatalf("Failed to connect database: %v", err)
+	}
+
+	// 3. 自动迁移表
+	db.AutoMigrate(&model.DatabaseInfo{}, &model.SubTableInfo{})
+
+	// 4. 初始化 Repository
+	dbRepo := repository.NewDatabaseRepository(db)
+	subTableRepo := repository.NewSubTableRepository(db)
+
+	// 5. 初始化 Service
+	dbService := service.NewDatabaseService(dbRepo, subTableRepo)
+	subTableService := service.NewSubTableService(subTableRepo, dbRepo)
+
+	// 6. 初始化 Handler
+	dbHandler := handler.NewDatabaseHandler(dbService)
+	subTableHandler := handler.NewSubTableHandler(subTableService)
+	systemHandler := handler.NewSystemHandler()
+
+	// 7. 设置路由
+	r := gin.New()
+
+	// 添加日志和恢复中间件
+	r.Use(gin.Logger())
+	r.Use(gin.Recovery())
+
+	// 请求日志中间件
+	r.Use(func(c *gin.Context) {
+		start := time.Now()
+		path := c.Request.URL.Path
+
+		// 记录请求体
+		var requestBody []byte
+		if c.Request.Method == "POST" || c.Request.Method == "PUT" {
+			requestBody, _ = io.ReadAll(c.Request.Body)
+			c.Request.Body = io.NopCloser(bytes.NewBuffer(requestBody))
+		}
+
+		c.Next()
+
+		// 记录响应日志
+		latency := time.Since(start)
+		status := c.Writer.Status()
+
+		// 使用日志系统记录
+		logger.LogRequest(c.Request.Method, path, string(requestBody), status, latency)
+	})
+
+	// CORS 中间件
+	r.Use(func(c *gin.Context) {
+		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
+		c.Writer.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(204)
+			return
+		}
+
+		c.Next()
+	})
+
+	// 数据库管理模块
+	databaseGroup := r.Group("/database")
+	{
+		databaseGroup.GET("/list", dbHandler.List)
+		databaseGroup.GET("/:id", dbHandler.GetByID)
+		databaseGroup.POST("/check", dbHandler.Check)
+		databaseGroup.POST("/add", dbHandler.Create)
+		databaseGroup.PUT("/:id", dbHandler.Update)
+		databaseGroup.DELETE("/:id", dbHandler.Delete)
+	}
+
+	// 子表映射管理模块
+	subTableGroup := r.Group("/sub-table")
+	{
+		subTableGroup.POST("/add", subTableHandler.Create)
+		subTableGroup.GET("/:id", subTableHandler.GetByID)
+		subTableGroup.GET("/database/:database_id", subTableHandler.ListByDatabase)
+		subTableGroup.GET("/mapping/:database_id", subTableHandler.GetMappingFromFile)
+		subTableGroup.GET("/ddl/:database_id", subTableHandler.GetTablesDDL)
+		subTableGroup.PUT("/:id", subTableHandler.Update)
+		subTableGroup.DELETE("/:id", subTableHandler.Delete)
+	}
+
+	// 系统信息模块
+	r.GET("/system/info", systemHandler.GetSystemInfo)
+
+	// 8. 启动服务
+	log.Printf("Server starting on :%s", cfg.Port)
+	if err := r.Run(":" + cfg.Port); err != nil {
+		log.Fatalf("Failed to start server: %v", err)
+	}
+}