fix: 完善Agent系统信息上报

- 持续上报系统元数据并动态更新运行时长
- 兼容旧版心跳补齐资产运行时长
- 修复监控指标当前值重复显示单位

agent/main.go

@@ -116,12 +116,11 @@ func main() {
 
 	sysInfo := collector.CollectSystem()
 	logger.Printf("系统信息: OS=%q Kernel=%q", sysInfo.OSVersion, sysInfo.Kernel)
+	agentStartedAt := time.Now()
 
 	localIP := detectLocalIP()
 	logger.Printf("探测本机 IP: %s", localIP)
 
-	sysReportCount := 0
-
 	taskExecutor := task.New(logger)
 	taskClient := task.NewClient(httpCli, cfg.Hostname, logger)
 
@@ -135,20 +134,17 @@ func main() {
 	var probeConfigs []model.ProbeConfig
 
 	collectAndReport := func() {
+		currentUptime := sysInfo.UptimeSeconds + int64(time.Since(agentStartedAt).Seconds())
 		report := &model.Report{
 			Hostname:     cfg.Hostname,
 			IP:           localIP,
 			Timestamp:    time.Now().UTC().Format(time.RFC3339),
 			AgentVersion: version,
-		}
-
-		if sysReportCount < 3 && (sysInfo.OSVersion != "" || sysInfo.Kernel != "") {
-			report.System = &model.SystemStat{
+			System: &model.SystemStat{
 				OSVersion: sysInfo.OSVersion,
 				Kernel:    sysInfo.Kernel,
-				Uptime:    sysInfo.UptimeSeconds,
-			}
-			sysReportCount++
+				Uptime:    currentUptime,
+			},
 		}
 
 		if stat, err := cpuCollector.Collect(); err != nil {
@@ -211,7 +207,7 @@ func main() {
 		runtime.ReadMemStats(&memStats)
 		report.Heartbeat = model.AgentHeartbeat{
 			Version:   version,
-			UptimeSec: sysInfo.UptimeSeconds,
+			UptimeSec: currentUptime,
 			SelfCPU:   0,
 			SelfRSSMB: float64(memStats.Alloc) / 1024.0 / 1024.0,
 			ReportSeq: reportSeq,

backend/controller/agent.go

@@ -150,6 +150,10 @@ func (h *AgentHandler) ReceiveReport(c *gin.Context) {
 			updates["uptime"] = req.System.Uptime
 		}
 	}
+	// 兼容旧版 Agent：系统信息缺席时使用心跳中的运行时长补齐资产元数据。 // Logan.Li
+	if _, ok := updates["uptime"]; !ok && req.Heartbeat.UptimeSec > 0 {
+		updates["uptime"] = req.Heartbeat.UptimeSec
+	}
 	var result *gorm.DB
 	if assetMatched {
 		result = h.db.Model(&model.Server{}).Where("id = ?", matchedServer.ID).Updates(updates)
@@ -162,19 +166,32 @@ func (h *AgentHandler) ReceiveReport(c *gin.Context) {
 	// 避免 Agent 每次上报（10s）都新建记录导致资产越来越多。
 	if result.Error == nil && result.RowsAffected == 0 {
 		osName := ""
+		kernel := ""
+		uptime := req.Heartbeat.UptimeSec
 		if req.System != nil {
 			osName = req.System.OSVersion
+			kernel = req.System.Kernel
+			if req.System.Uptime > 0 {
+				uptime = req.System.Uptime
+			}
 		}
 		var existing model.Server
 		if h.db.Where("hostname = ?", req.Hostname).Take(&existing).Error == nil {
 			// 已自动注册过 → 仅更新实时指标，不重复创建
-			h.db.Model(&existing).Updates(map[string]interface{}{
+			existingUpdates := map[string]interface{}{
 				"ip": matchIP, "os": osName, "cpu": req.CPU.CoreCount,
 				"memory": memMB, "disk": diskGB, "status": "running",
 				"agent_status": "online", "agent_version": req.AgentVersion,
 				"cpu_usage": req.CPU.UsagePercent, "memory_usage": req.Memory.UsagePercent,
 				"disk_usage": diskAvg,
-			})
+			}
+			if kernel != "" {
+				existingUpdates["kernel"] = kernel
+			}
+			if uptime > 0 {
+				existingUpdates["uptime"] = uptime
+			}
+			h.db.Model(&existing).Updates(existingUpdates)
 		} else {
 			// 真正的新主机 → 注册，hostname 无唯一索引时不使用 OnConflict。 // Logan.Li
 			newServer := model.Server{
@@ -190,6 +207,8 @@ func (h *AgentHandler) ReceiveReport(c *gin.Context) {
 				Status:       "running",
 				AgentStatus:  "online",
 				AgentVersion: req.AgentVersion,
+				Kernel:       kernel,
+				Uptime:       uptime,
 				CPUUsage:     req.CPU.UsagePercent,
 				MemoryUsage:  req.Memory.UsagePercent,
 				DiskUsage:    diskAvg,

backend/controller/agent_report_test.go

@@ -79,6 +79,51 @@ func TestReceiveReportMatchesExistingAssetByIP(t *testing.T) {
 	}
 }
 
+func TestReceiveReportUsesHeartbeatUptimeWithoutSystemPayload(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	db, err := gorm.Open(sqlite.Open("file:agent_report_heartbeat_uptime?mode=memory&cache=shared"), &gorm.Config{
+		Logger: gormlogger.Default.LogMode(gormlogger.Silent),
+	})
+	if err != nil {
+		t.Fatalf("打开测试数据库失败: %v", err)
+	}
+	if err := db.AutoMigrate(&model.Server{}, &model.AgentReport{}, &model.HealthProbe{}); err != nil {
+		t.Fatalf("迁移测试表失败: %v", err)
+	}
+
+	server := model.Server{Hostname: "c-monitor", IP: "172.19.16.113", Status: "running"}
+	if err := db.Create(&server).Error; err != nil {
+		t.Fatalf("创建测试资产失败: %v", err)
+	}
+
+	body := []byte(`{
+		"hostname":"c-monitor",
+		"ip":"172.19.16.113",
+		"agent_version":"v2.1.0",
+		"cpu":{"usage_percent":1.5,"core_count":4},
+		"memory":{"total_gb":15.1,"used_gb":1.8,"available_gb":13.3,"usage_percent":11.9},
+		"heartbeat":{"uptime_sec":7200}
+	}`)
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/agent/report", bytes.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+	recorder := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(recorder)
+	c.Request = req
+
+	NewAgentHandler(db, nil, nil).ReceiveReport(c)
+	if recorder.Code != http.StatusOK {
+		t.Fatalf("上报返回码 = %d, body=%s", recorder.Code, recorder.Body.String())
+	}
+
+	var gotServer model.Server
+	if err := db.Take(&gotServer, server.ID).Error; err != nil {
+		t.Fatalf("读取资产失败: %v", err)
+	}
+	if gotServer.Uptime != 7200 {
+		t.Fatalf("心跳运行时长未写入资产: got=%d want=7200", gotServer.Uptime)
+	}
+}
+
 func TestGetLatestReportsUsesUTCTimeBoundary(t *testing.T) {
 	gin.SetMode(gin.TestMode)
 	db, err := gorm.Open(sqlite.Open("file:agent_latest_utc?mode=memory&cache=shared"), &gorm.Config{

frontend/src/pages/monitor/host-monitor/MetricChartCard.tsx

@@ -33,6 +33,8 @@ export function MetricChartCard({
   const [zoomed, setZoomed] = useState(false);
   const chartData = data.map((d) => ({ ...d, value: d[aggType] }));
   const shortTitle = title.replace(/\(.+\)/, '').trim();
+  // 当前值可能已包含 %、GB、KB/s 等单位，避免卡片重复拼接。 // Logan.Li
+  const displayUnit = /[%a-zA-Z/]/.test(value) ? '' : unit;
 
   return (
     <Card className="bg-[var(--dg-bg-secondary)] border-[var(--dg-border)]">
@@ -52,7 +54,7 @@ export function MetricChartCard({
         </div>
         <div className="mb-2 pl-10">
           <span className="text-xl font-bold text-[var(--dg-text-primary)] tabular-nums">{value}</span>
-          {unit && <span className="text-xs text-[var(--dg-text-muted)] ml-1">{unit}</span>}
+          {displayUnit && <span className="text-xs text-[var(--dg-text-muted)] ml-1">{displayUnit}</span>}
         </div>
         <ZoomableAreaChart
           ref={chartRef}
@@ -62,7 +64,7 @@ export function MetricChartCard({
           unit={unit}
           chartId={safeChartId(title)}
           title={title}
-          subtitle={`${t('monitor.metricChart.currentPrefix')} ${value}${unit ? ` ${unit}` : ''}`}
+          subtitle={`${t('monitor.metricChart.currentPrefix')} ${value}${displayUnit ? ` ${displayUnit}` : ''}`}
           height={188}
           toolbarPlacement="header"
           onZoomedChange={setZoomed}
@@ -71,4 +73,4 @@ export function MetricChartCard({
       </CardContent>
     </Card>
   );
-}
+}