fix: resolve loadAvg is not defined ReferenceError in updateStream

posimai-dev/station.html

@@ -327,6 +327,8 @@ const hist = {cpu:[], load:[]};
 const svcHist = {};
 const svcLatHist = {};
 SERVICES.forEach(s => { svcHist[s.id] = []; svcLatHist[s.id] = []; });
+// メトリクスのグローバルキャッシュ（updateStream の setInterval から参照）
+let _metrics = { cpuPct:0, memPct:0, diskPct:0, loadAvg:[0,0,0], uptimeS:0, sessions:0, hostname:'ubuntu-pc', nodeVer:'' };
 let streamData = null;
 
 function p(n){ return String(n).padStart(2,'0'); }
@@ -588,7 +590,7 @@ function updateStream(data){
         `CPU:${b8(cpuPct??0)}`,
         `MEM:${b8(memPct??0)}`,
         `DISK:${b8(diskPct??0)}`,
-        `LOAD:${b8(Math.min(255,Math.round((loadAvg[0]||0)*64)))}`,
+        `LOAD:${b8(Math.min(255,Math.round(((data.load_avg&&data.load_avg[0])||0)*64)))}`,
         `UP:${(data.uptime_s||0).toString(2)}`,
         `SESSION:${b8(data.active_sessions||0)}`,
         `TIME:${(Math.floor(Date.now()/1000)).toString(2).slice(-20)}`,