fix: preserve plain-language current understanding

components/reasoning-workspace.jsx

@@ -179,7 +179,9 @@ function EvidenceLimitCard() {
 }
 
 // ── Current understanding card ────────────────────────────────
-function CurrentUnderstandingCard({ currentSummary }) {
+function CurrentUnderstandingCard({ currentSummary, plainLanguage }) {
+  if (plainLanguage) return <PlainLanguageCard summary={plainLanguage} />;
+
   const summary = resolveCurrentSummary(currentSummary);
 
   if (!summary) return null;
@@ -194,6 +196,20 @@ function CurrentUnderstandingCard({ currentSummary }) {
   );
 }
 
+// ── Plain-language understanding card (from pipeline summary) ──
+function PlainLanguageCard({ summary }) {
+  if (!summary) return null;
+
+  return (
+    <div className="rounded-lg border border-gray-200 bg-white p-5">
+      <h2 className="mb-3 text-sm font-semibold uppercase tracking-wide text-gray-500">
+        Current understanding
+      </h2>
+      <p className="text-sm leading-relaxed text-gray-700">{summary}</p>
+    </div>
+  );
+}
+
 // ── Investigation history card (readable notebook style) ──────
 function InvestigationHistoryCard({ turn }) {
   const isCollapsed = turn._collapsed;
@@ -356,6 +372,7 @@ export default function ReasoningWorkspace({
   scenario,
   status,
   updateStatus,
+  currentUnderstanding: propUnderstanding,
   result,
   answer,
   setAnswer,
@@ -425,10 +442,11 @@ export default function ReasoningWorkspace({
   const genuineCompletion = hasGenuineCompletion(graph);
 
   // Determine whether the Current Understanding card should render:
-  // — shows while there is an actual summary from any graph snapshot, or
+  // — when there is a durable plain-language understanding, or
+  // — when there is an actual summary from any graph snapshot, or
   // — when the investigation has reached a terminal state with no active question.
   const hasCurrentSummaryCondition =
-    Boolean(graph?.currentSummary || result?.updatedSituationGraph?.currentSummary) || !hasSelectedQuestion;
+    Boolean(propUnderstanding || graph?.currentSummary || result?.updatedSituationGraph?.currentSummary) || !hasSelectedQuestion;
 
   return (
     <div className="space-y-6">
@@ -502,7 +520,7 @@ export default function ReasoningWorkspace({
           {status === "success" && !hasSelectedQuestion && graph && !genuineCompletion && <EvidenceLimitCard />}
 
           {/* ── Supporting sections (same order for active and terminal) ─ */}
-          {hasCurrentSummaryCondition && <CurrentUnderstandingCard currentSummary={graph?.currentSummary || result?.updatedSituationGraph?.currentSummary} />}
+          {hasCurrentSummaryCondition && <CurrentUnderstandingCard currentSummary={graph?.currentSummary || result?.updatedSituationGraph?.currentSummary} plainLanguage={propUnderstanding || null} />}
 
           <OriginalSituation scenario={scenario} centralStatement={graph?.centralStatement} />