移除遗留的 HostMetric 相关代码

pkg/agent/collector/system.go

@@ -3,6 +3,7 @@ package collector
 import (
 	"github.com/dushixiang/pika/internal/protocol"
 	"github.com/shirou/gopsutil/v4/host"
+	"github.com/shirou/gopsutil/v4/load"
 )
 
 // HostCollector 主机信息采集器
@@ -33,6 +34,12 @@ func (h *HostCollector) Collect() (*protocol.HostInfoData, error) {
 		KernelArch:      hostInfo.KernelArch,
 	}
 
+	if loadAvg, err := load.Avg(); err == nil && loadAvg != nil {
+		hostData.Load1 = loadAvg.Load1
+		hostData.Load5 = loadAvg.Load5
+		hostData.Load15 = loadAvg.Load15
+	}
+
 	// 尝试获取虚拟化信息
 	if hostInfo.VirtualizationSystem != "" {
 		hostData.VirtualizationSystem = hostInfo.VirtualizationSystem

pkg/agent/service/agent.go

@@ -528,7 +528,7 @@ func (a *Agent) collectAndSendAllMetrics(manager *collector.Manager) error {
 		hasError = true
 	}
 
-	// 主机信息
+	// 主机信息（包含 Load）
 	if err := manager.CollectAndSendHost(writer); err != nil {
 		slog.Warn("发送主机信息失败", "error", err)
 		hasError = true