fix: unify reasoning mode across submissions

components/investigation-summary-panel.jsx

@@ -29,7 +29,7 @@ function humaniseDuration(seconds) {
 
 /* ── Component ────────────────────────────────────────────── */
 
-function InvestigationSummaryPanel({ graph, selectedQuestion, result }) {
+function InvestigationSummaryPanel({ graph, selectedQuestion, result, updateStatus }) {
   // ── Current status ────────────────────────────────────────────
   // TODO: reasoning should emit an explicit status field such as
   //   "investigating", "evidence_limit_reached", "resolution_achieved".
@@ -38,7 +38,9 @@ function InvestigationSummaryPanel({ graph, selectedQuestion, result }) {
   const hasGraph = Boolean(graph);
 
   let currentStatus;
-  if (!hasGraph) {
+  if (updateStatus === "loading") {
+    currentStatus = { label: "Reasoning", level: "investigating" };
+  } else if (!hasGraph) {
     currentStatus = { label: "Not started", level: "idle" };
   } else if (isInvestigating) {
     currentStatus = { label: "Investigation in progress", level: "investigating" };

components/reasoning-workspace.jsx

@@ -673,7 +673,7 @@ export default function ReasoningWorkspace({
       ) : (
         <>
           {/* ── Investigation summary card ─────────────── */}
-          <InvestigationSummaryPanel graph={graph} selectedQuestion={selectedQ} result={result} />
+          <InvestigationSummaryPanel graph={graph} selectedQuestion={selectedQ} result={result} updateStatus={updateStatus} />
 
           {/* ── Active investigation: question + form (top priority) ─ */}
           {canAnswer && (

components/scenario-form.jsx

@@ -443,7 +443,7 @@ export default function ScenarioForm() {
       )}
 
       {/* ── Main result workspace ─────────────────────── */}
-      {(status === "success" || status === "error" || updateStatus === "success") && (
+      {(status === "success" || status === "error") && updateStatus !== "loading" && (
         <ReasoningWorkspace
           scenario={scenario}
           status={status}
@@ -475,6 +475,16 @@ export default function ScenarioForm() {
         />
       )}
 
+      {/* ── Update loading (reasoning mode) ─────────── */}
+      {updateStatus === "loading" && status === "success" && (
+        <LoadingOverlay
+          isLoading={true}
+          elapsed={updateElapsed}
+          currentMessage={updateMsg}
+          variant="update"
+        />
+      )}
+
       {/* ── Continue later banner when session was restored ── */}
       {status === "success" && result?.updatedAt && (
         <ContinueLaterBanner onRestart={() => { clearSession(); setStatus("idle"); setResult(null); setAnswer(""); setUpdateStatus("idle"); setCurrentUnderstanding(null); }} />