fix(web-probe): flag sealed duration drift (#739)

Co-authored-by: Codex <codex@noreply.local>

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

@@ -2638,6 +2638,8 @@ function buildFindings(samples, control, network, errors, sampleMetrics, promptN
   if (elapsedZeroResets.length > 0) findings.push({ id: "turn-timing-total-elapsed-zero-reset", severity: "red", summary: "Code Agent total elapsed jumped from a non-zero value back to 0 seconds", count: elapsedZeroResets.length, samples: elapsedZeroResets.slice(0, 20) });
   const elapsedForwardJumps = Array.isArray(sampleMetrics?.turnTimingTotalElapsedForwardJumps) ? sampleMetrics.turnTimingTotalElapsedForwardJumps : [];
   if (elapsedForwardJumps.length > 0) findings.push({ id: "turn-timing-total-elapsed-forward-jump", severity: "red", summary: "Code Agent total elapsed jumped forward faster than browser sample interval", count: elapsedForwardJumps.length, samples: elapsedForwardJumps.slice(0, 20) });
+  const terminalElapsedGrowth = Array.isArray(sampleMetrics?.turnTimingTerminalElapsedGrowth) ? sampleMetrics.turnTimingTerminalElapsedGrowth : [];
+  if (terminalElapsedGrowth.length > 0) findings.push({ id: "turn-timing-terminal-elapsed-growth", severity: "red", summary: "terminal Code Agent card total elapsed changed after terminal status; completed/failed/canceled timing must be sealed", count: terminalElapsedGrowth.length, samples: terminalElapsedGrowth.slice(0, 20) });
   const recentUpdateSawtoothJumps = Array.isArray(sampleMetrics?.turnTimingRecentUpdateSawtoothJumps)
     ? sampleMetrics.turnTimingRecentUpdateSawtoothJumps
     : Array.isArray(sampleMetrics?.turnTimingNonMonotonic)
@@ -3718,6 +3720,7 @@ function prioritizeFindings(findings) {
     if (id.startsWith("code-agent-card-")) return 0.8;
     if (id.startsWith("round-completion-")) return 0.9;
     if (id.startsWith("turn-timing-total-elapsed")) return 1;
+    if (id.startsWith("turn-timing-terminal-elapsed")) return 1.1;
     if (id.startsWith("turn-timing-recent-update")) return 2;
     if (id.includes("runtime-execution") || id.includes("prompt-chat-submit-failed")) return 3;
     return 10;
@@ -4844,17 +4847,37 @@ function maxSelfReportedDurationEvidence(text) {
   const value = String(text || '');
   const lines = value.split(/\n+/).map((line) => line.trim()).filter(Boolean);
   let best = null;
-  for (const line of lines) {
-    if (!/耗时|用时|duration|elapsed/i.test(line)) continue;
-    const seconds = parseSelfReportedRoundDurationSeconds(line);
+  for (let index = 0; index < lines.length; index += 1) {
+    const line = lines[index];
+    const previous = index > 0 ? lines[index - 1] : '';
+    const next = index + 1 < lines.length ? lines[index + 1] : '';
+    const candidateText = selfReportedDurationCandidateText(previous, line, next);
+    if (!candidateText) continue;
+    const seconds = parseSelfReportedRoundDurationSeconds(candidateText);
     if (!Number.isFinite(seconds)) continue;
     if (!best || seconds > best.seconds) {
-      best = { kind: 'final-response-duration', seconds, preview: compactOneLine(line).slice(0, 240) };
+      best = { kind: 'final-response-duration', seconds, preview: compactOneLine(candidateText).slice(0, 240) };
     }
   }
   return best;
 }
 
+function selfReportedDurationCandidateText(previous, line, next) {
+  const current = String(line || '');
+  const before = String(previous || '');
+  const after = String(next || '');
+  const windowText = [before, current, after].filter(Boolean).join(' ');
+  const hasDurationKeyword = /耗时|用时|duration|elapsed/i.test(current);
+  const hasNearbyDurationHeading = /(?:本轮|整轮|全程|任务|round|turn)?\s*(?:耗时|用时|duration|elapsed)/i.test(before)
+    || /(?:本轮|整轮|全程|任务|round|turn)?\s*(?:耗时|用时|duration|elapsed)/i.test(after);
+  const hasDurationValue = /(?:约|大约|around|about)?\s*\d+(?:\.\d+)?\s*(?:小时|分钟|分|秒|hour|hours|hr|hrs|min|mins|minute|minutes|sec|secs|second|seconds)/i.test(windowText);
+  const hasRoundContext = /本轮|整轮|全程|从.+到|全部通过|smoke|benchmark|round|turn|completed|passed/i.test(windowText);
+  if (hasDurationKeyword && hasDurationValue) return current;
+  if (hasNearbyDurationHeading && hasDurationValue) return windowText;
+  if (hasRoundContext && hasDurationValue && /(?:约|大约|around|about)\s*\d|\d+(?:\.\d+)?\s*(?:分钟|小时|minute|hour)/i.test(current)) return windowText;
+  return '';
+}
+
 function parseSelfReportedRoundDurationSeconds(text) {
   const value = String(text || '');
   const clock = value.match(/(?:耗时|用时|duration|elapsed)[^0-9]{0,24}(\d{1,2}:\d{2}:\d{2}|\d{1,2}:\d{2})/i);