fix: require persistent workbench trace hydration stalls

scripts/src/hwlab-node-web-observe-analyzer-source.ts

@@ -2234,26 +2234,65 @@ function detectWorkbenchInPlaceProjectionLag(samples, network) {
 }
 
 function detectWorkbenchTerminalTraceMissing(samples) {
+  const budgetMs = Number.isFinite(Number(alertThresholds.sameOriginApiSlowMs)) ? Number(alertThresholds.sameOriginApiSlowMs) : 10_000;
   const rows = [];
-  for (const sample of Array.isArray(samples) ? samples : []) {
+  const open = new Map();
+  const sortedSamples = (Array.isArray(samples) ? samples : [])
+    .filter(isWorkbenchPathSample)
+    .slice()
+    .sort((a, b) => Date.parse(a?.ts || "") - Date.parse(b?.ts || ""));
+  const closeSegment = (key, lastSample = null) => {
+    const segment = open.get(key);
+    if (!segment) return;
+    open.delete(key);
+    const firstMs = Date.parse(segment.first.ts || "");
+    const lastMs = Date.parse((lastSample ?? segment.last).ts || "");
+    const observedMs = Number.isFinite(firstMs) && Number.isFinite(lastMs) && lastMs >= firstMs ? Math.round(lastMs - firstMs) : 0;
+    if (observedMs <= budgetMs) return;
+    rows.push({
+      ...ref(segment.first),
+      lastSeq: segment.last.seq ?? null,
+      lastAt: segment.last.ts ?? null,
+      traceId: segment.traceId,
+      messageCount: Array.isArray(segment.last.messages) ? segment.last.messages.length : 0,
+      turnCount: Array.isArray(segment.last.turns) ? segment.last.turns.length : 0,
+      traceRowCount: 0,
+      sampleCount: segment.sampleCount,
+      observedMs,
+      budgetMs,
+      finalMessageVisible: workbenchFinalMessageVisible(segment.last, segment.traceId),
+      terminalTurnVisible: workbenchTerminalTurnVisible(segment.last, segment.traceId),
+      detail: "terminal turn/message stayed visible for this trace while the same in-place Workbench page had zero trace rows beyond the configured budget",
+      valuesRedacted: true
+    });
+  };
+  for (const sample of sortedSamples) {
     if (!isWorkbenchPathSample(sample)) continue;
+    const tsMs = Date.parse(sample?.ts || "");
+    if (!Number.isFinite(tsMs)) continue;
     const terminalTraceIds = workbenchTerminalTraceIdsFromDom(sample);
+    const presentKeys = new Set();
     for (const traceId of terminalTraceIds) {
+      const key = [samplePageKey(sample), sample?.routeSessionId ?? "", sample?.activeSessionId ?? "", traceId].join("|");
+      presentKeys.add(key);
       const traceRows = workbenchTraceRowsForTrace(sample, traceId);
-      if (traceRows.length > 0) continue;
-      rows.push({
-        ...ref(sample),
-        traceId,
-        messageCount: Array.isArray(sample.messages) ? sample.messages.length : 0,
-        turnCount: Array.isArray(sample.turns) ? sample.turns.length : 0,
-        traceRowCount: 0,
-        finalMessageVisible: workbenchFinalMessageVisible(sample, traceId),
-        terminalTurnVisible: workbenchTerminalTurnVisible(sample, traceId),
-        detail: "terminal turn/message was visible for this trace, but the same in-place Workbench sample still had zero trace rows",
-        valuesRedacted: true
-      });
+      if (traceRows.length > 0) {
+        closeSegment(key, sample);
+        continue;
+      }
+      const existing = open.get(key);
+      if (existing) {
+        existing.last = sample;
+        existing.sampleCount += 1;
+      } else {
+        open.set(key, { first: sample, last: sample, traceId, sampleCount: 1 });
+      }
+    }
+    for (const [key, segment] of Array.from(open.entries())) {
+      if (samplePageKey(sample) === samplePageKey(segment.first) && !presentKeys.has(key)) closeSegment(key, sample);
     }
   }
+  for (const key of Array.from(open.keys())) closeSegment(key);
   return rows;
 }