feat: 后端工具和 MCP 模块更新

- main.go: 更新工作空间目录，添加 MCP 模型迁移
- tool.go: 添加 description_cn 字段
- auth_service, tool_service: 优化
- 更新 Swagger 文档

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

server/cmd/api/main.go

@@ -128,8 +128,8 @@ func ensureAdminWorkspace() {
 		return
 	}
 
-	// 创建子目录
-	for _, dir := range []string{"projects", "files", "temp"} {
+	// 创建子目录: skills(技能), scripts(脚本), sandbox(沙盒), files(文件), temp(临时)
+	for _, dir := range []string{"skills", "scripts", "sandbox", "files", "temp"} {
 		os.MkdirAll(filepath.Join(workspacePath, dir), 0755)
 	}
 
@@ -151,7 +151,7 @@ func main() {
 	}
 
 	// 3. 自动迁移表
-	db.AutoMigrate(&model.DatabaseInfo{}, &model.SubTableInfo{}, &model.ModelInfo{}, &model.KnowledgeBase{}, &model.KnowledgeDocument{}, &model.User{}, &model.Role{}, &model.Tool{})
+	db.AutoMigrate(&model.DatabaseInfo{}, &model.SubTableInfo{}, &model.ModelInfo{}, &model.KnowledgeBase{}, &model.KnowledgeDocument{}, &model.User{}, &model.Role{}, &model.Tool{}, &model.MCP{})
 
 	// 3.1 确保 users 和 roles 表存在（使用 SQL 强制创建）
 	db.Exec(`
@@ -209,6 +209,22 @@ func main() {
 	if !migrator.HasColumn(&model.Tool{}, "parameters") {
 		migrator.AddColumn(&model.Tool{}, "parameters")
 	}
+	if !migrator.HasColumn(&model.Tool{}, "description_cn") {
+		migrator.AddColumn(&model.Tool{}, "description_cn")
+	}
+	// MCP 相关字段
+	if !migrator.HasColumn(&model.Tool{}, "transport") {
+		migrator.AddColumn(&model.Tool{}, "transport")
+	}
+	if !migrator.HasColumn(&model.Tool{}, "command") {
+		migrator.AddColumn(&model.Tool{}, "command")
+	}
+	if !migrator.HasColumn(&model.Tool{}, "args") {
+		migrator.AddColumn(&model.Tool{}, "args")
+	}
+	if !migrator.HasColumn(&model.Tool{}, "env") {
+		migrator.AddColumn(&model.Tool{}, "env")
+	}
 
 	log.Println("Database tables verified/created")
 
@@ -219,6 +235,7 @@ func main() {
 	knowledgeRepo := repository.NewKnowledgeRepository(db)
 	userRepo := repository.NewUserRepository(db)
 	toolRepo := repository.NewToolRepository(db)
+	mcpRepo := repository.NewMCPRepository(db)
 
 	// 4.1 初始化默认管理员用户
 	initDefaultAdmin(userRepo)
@@ -235,6 +252,7 @@ func main() {
 	knowledgeService := service.NewKnowledgeService(knowledgeRepo, modelRepo, uploadService, cfg.PythonServiceURL, cfg.AICoreServiceAddr, cfg.MarkdownLocalPath)
 	authService := service.NewAuthService(cfg.JWTSecret, userRepo)
 	toolService := service.NewToolService(toolRepo)
+	mcpService := service.NewMCPService(mcpRepo)
 
 	// 4.2 初始化默认工具
 	if err := toolService.InitDefaultTools(); err != nil {
@@ -252,6 +270,7 @@ func main() {
 	knowledgeHandler := handler.NewKnowledgeHandler(knowledgeService)
 	authHandler := handler.NewAuthHandler(authService)
 	toolHandler := handler.NewToolHandler(toolService)
+	mcpHandler := handler.NewMCPHandler(mcpService)
 	var uploadHandler *handler.UploadHandler
 	if uploadService != nil {
 		uploadHandler = handler.NewUploadHandler(uploadService, knowledgeRepo)
@@ -396,6 +415,16 @@ func main() {
 		toolGroup.DELETE("/:id", toolHandler.Delete)
 	}
 
+	// MCP管理模块
+	mcpGroup := r.Group("/mcp")
+	{
+		mcpGroup.GET("/list", mcpHandler.List)
+		mcpGroup.GET("/:id", mcpHandler.GetByID)
+		mcpGroup.POST("/add", mcpHandler.Create)
+		mcpGroup.PUT("/:id", mcpHandler.Update)
+		mcpGroup.DELETE("/:id", mcpHandler.Delete)
+	}
+
 	// Swagger 文档
 	r.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))