修复下线问题

server/prometheus-service.js

@@ -279,6 +279,8 @@ async function getOverviewMetrics(url, sourceName) {
     }
   }
 
+  const activeInstances = Array.from(instances.values()).filter(inst => inst.up);
+
   // Aggregate
   let totalCpuUsed = 0, totalCpuCores = 0;
   let totalMemUsed = 0, totalMemTotal = 0;
@@ -286,7 +288,7 @@ async function getOverviewMetrics(url, sourceName) {
   let totalNetRx = 0, totalNetTx = 0;
   let totalTraffic24hRx = 0, totalTraffic24hTx = 0;
 
-  for (const inst of instances.values()) {
+  for (const inst of activeInstances) {
     totalCpuUsed += (inst.cpuPercent / 100) * inst.cpuCores;
     totalCpuCores += inst.cpuCores;
     totalMemUsed += inst.memUsed;
@@ -306,7 +308,7 @@ async function getOverviewMetrics(url, sourceName) {
   }
 
   return {
-    totalServers: instances.size,
+    totalServers: activeInstances.length,
     cpu: {
       used: totalCpuUsed,
       total: totalCpuCores,
@@ -332,7 +334,7 @@ async function getOverviewMetrics(url, sourceName) {
       tx: totalTraffic24hTx,
       total: totalTraffic24hRx + totalTraffic24hTx
     },
-    servers: Array.from(instances.values()).map(s => {
+    servers: activeInstances.map(s => {
       const { originalInstance, ...rest } = s;
       return rest;
     })