feat: v0.34 健康探针(Architecture B) + Agent v2.1 + 端口监控 + 告警联系人重构

- v0.31: AlertContact 重构(channel_type下拉+webhook_url替代三分立字段)
- v0.32: Agent ProcessTop 增强(cmdline/user/cpu_pct/mem_pct)
- v0.33: 端口监控 Tab(监听端口自动发现+down联动告警)
- v0.34: 健康探针(Agent本地执行HTTP/TCP/Exec→结果随心跳上报)
- Agent新增: ContextSwitch/FD/HealthProbe采集器
- 后端新增: health_probe handler + Agent model扩展
- HostMonitor新增Tab: 健康探针/端口监控

backend/internal/api/handlers/alert_contacts.go

@@ -33,12 +33,11 @@ func (h *AlertHandler) CreateContact(c *gin.Context) {
 		return
 	}
 	contact := models.AlertContact{
-		Name:     req.Name,
-		Phone:    req.Phone,
-		Email:    req.Email,
-		Dingtalk: req.Dingtalk,
-		Feishu:   req.Feishu,
-		Wechat:   req.Wechat,
+		Name:        req.Name,
+		Phone:       req.Phone,
+		Email:       req.Email,
+		ChannelType: req.ChannelType,
+		WebhookURL:  req.WebhookURL,
 	}
 	if err := h.db.Create(&contact).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "创建失败"})
@@ -64,9 +63,8 @@ func (h *AlertHandler) UpdateContact(c *gin.Context) {
 	if req.Name != "" { updates["name"] = req.Name }
 	if req.Phone != "" { updates["phone"] = req.Phone }
 	if req.Email != "" { updates["email"] = req.Email }
-	if req.Dingtalk != "" { updates["dingtalk"] = req.Dingtalk }
-	if req.Feishu != "" { updates["feishu"] = req.Feishu }
-	if req.Wechat != "" { updates["wechat"] = req.Wechat }
+	if req.ChannelType != "" { updates["channel_type"] = req.ChannelType }
+	if req.WebhookURL != "" { updates["webhook_url"] = req.WebhookURL }
 	h.db.Model(&contact).Updates(updates)
 	h.db.First(&contact, id)
 	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "更新成功", Data: contact})