feat: 更新后端服务

- agent_handler.go: 新增agent管理接口
- agent_service.go: 扩展agent服务逻辑
- skill_handler.go: 更新skill接口
- chat_service.go: 更新chat服务
- model相关: 新增model仓库和服务
- main.go: 更新路由配置

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

server/cmd/api/main.go

@@ -147,7 +147,28 @@ 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{}, &model.MCP{}, &model.Skill{}, &model.Agent{}, &model.AgentSkill{}, &model.AgentKnowledgeBase{}, &model.AgentMemory{}, &model.AgentTeam{}, &model.AgentTask{})
+	if err := db.AutoMigrate(&model.DatabaseInfo{}, &model.SubTableInfo{}, &model.ModelInfo{}, &model.KnowledgeBase{}, &model.KnowledgeDocument{}, &model.User{}, &model.Role{}, &model.Tool{}, &model.MCP{}, &model.Skill{}, &model.Agent{}, &model.AgentSkill{}, &model.AgentKnowledgeBase{}, &model.AgentMemory{}, &model.AgentTeam{}, &model.AgentTask{}).Error; err != nil {
+		log.Printf("Warning: AutoMigrate error: %v", err)
+	}
+
+	// 3.2 确保 agents 表存在（使用 SQL 强制创建）
+	db.Exec(`
+		CREATE TABLE IF NOT EXISTS agents (
+			id VARCHAR(191) PRIMARY KEY,
+			name VARCHAR(100) NOT NULL,
+			description TEXT,
+			owner_id VARCHAR(50) NOT NULL,
+			INDEX idx_owner_id (owner_id),
+			skills TEXT,
+			role_description TEXT,
+			model_provider VARCHAR(50),
+			model_name VARCHAR(100),
+			is_supervisor TINYINT(1) DEFAULT 0,
+			is_active TINYINT(1) DEFAULT 1,
+			created_at DATETIME(3),
+			updated_at DATETIME(3)
+		)
+	`)
 
 	// 3.1 确保 users 和 roles 表存在（使用 SQL 强制创建）
 	db.Exec(`
@@ -297,7 +318,7 @@ func main() {
 	toolService := service.NewToolService(toolRepo)
 	mcpService := service.NewMCPService(mcpRepo)
 	skillService := service.NewSkillService(skillRepo)
-	agentService := service.NewAgentService(cfg.PythonServiceURL, modelRepo)
+	agentService := service.NewAgentService(cfg.PythonServiceURL, modelRepo, agentRepo)
 	memoryService := service.NewMemoryService(agentRepo)
 
 	// 4.2 初始化默认工具
@@ -502,6 +523,9 @@ func main() {
 	{
 		agentGroup.GET("/list", agentHandler.ListAgents)
 		agentGroup.POST("/create", agentHandler.CreateAgent)
+		agentGroup.PUT("/:id/status", agentHandler.UpdateAgentStatus)
+		agentGroup.PUT("/:id", agentHandler.UpdateAgent)
+		agentGroup.DELETE("/:id", agentHandler.DeleteAgent)
 		agentGroup.POST("/chat", agentHandler.Chat)
 		agentGroup.POST("/chat/stream", agentHandler.ChatStream)
 		agentGroup.POST("/team/chat", agentHandler.TeamChat)