fix: 远程命令直连SSH(去轮询) + 去掉无用命令分类

backend/internal/api/handlers/agent_install.go

@@ -254,3 +254,54 @@ func (h *AgentInstallHandler) BatchInstallAgent(c *gin.Context) {
 		},
 	})
 }
+
+// RemoteExec 直连 SSH 执行命令（即时返回，无轮询）
+// POST /api/v1/agent/exec
+func (h *AgentInstallHandler) RemoteExec(c *gin.Context) {
+	var req struct {
+		Hostname string `json:"hostname"`
+		Command  string `json:"command"`
+		Timeout  int    `json:"timeout"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil || req.Hostname == "" || req.Command == "" {
+		c.JSON(http.StatusBadRequest, models.Response{Code: 400, Message: "请提供 hostname 和 command"})
+		return
+	}
+	if req.Timeout <= 0 {
+		req.Timeout = 30
+	}
+
+	var server models.Server
+	if err := h.db.Where("hostname = ? OR ip = ?", req.Hostname, req.Hostname).First(&server).Error; err != nil {
+		c.JSON(http.StatusNotFound, models.Response{Code: 404, Message: "未找到服务器: " + req.Hostname})
+		return
+	}
+
+	client, err := sshDial(server)
+	if err != nil {
+		c.JSON(http.StatusOK, models.Response{Code: 500, Message: "SSH连接失败: " + err.Error()})
+		return
+	}
+	defer client.Close()
+
+	type result struct {
+		out string
+		err error
+	}
+	done := make(chan result, 1)
+	go func() {
+		out, err := runSSHCommand(client, req.Command)
+		done <- result{out, err}
+	}()
+
+	select {
+	case r := <-done:
+		if r.err != nil {
+			c.JSON(http.StatusOK, models.Response{Code: 200, Message: "执行完成", Data: gin.H{"output": r.out, "error": r.err.Error()}})
+			return
+		}
+		c.JSON(http.StatusOK, models.Response{Code: 200, Message: "执行成功", Data: gin.H{"output": r.out}})
+	case <-time.After(time.Duration(req.Timeout) * time.Second):
+		c.JSON(http.StatusOK, models.Response{Code: 408, Message: fmt.Sprintf("命令执行超时(%ds)", req.Timeout)})
+	}
+}

backend/internal/api/routes/routes.go

@@ -142,6 +142,9 @@ func Register(r *gin.Engine, db *gorm.DB, log *zap.Logger, cfg *config.Config, c
 		agentInstallHandler := handlers.NewAgentInstallHandler(db)
 		servers.POST("/:id/install-agent", agentInstallHandler.InstallAgent)
 		servers.POST("/install-agent", agentInstallHandler.BatchInstallAgent)
+
+		// Agent 远程命令执行
+		agentGroup.POST("/exec", agentInstallHandler.RemoteExec)
 	}
 
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