fix: preserve conversation after update

components/reasoning-workspace.jsx

@@ -365,6 +365,7 @@ export default function ReasoningWorkspace({
   answer,
   setAnswer,
   onAnswerSubmit,
+  lastSubmittedAnswer,
 }) {
   const { elapsed: startElapsed, currentMessage: startMsg } = useLoadingStatus(
     INITIAL_MESSAGES,
@@ -376,11 +377,14 @@ export default function ReasoningWorkspace({
     updateStatus === "loading"
   );
 
+  const isUpdating = updateStatus === "loading";
+  const hasSelectedQuestion = Boolean(result?.selectedQuestion);
+
   const canAnswer =
     status === "success" &&
-    updateStatus === "idle" &&
+    !isUpdating &&
     Boolean(result?.situationGraph) &&
-    Boolean(result?.selectedQuestion);
+    hasSelectedQuestion;
 
   const selectedQ = result?.selectedQuestion ?? null;
   const graph = result?.situationGraph ?? null;
@@ -425,7 +429,7 @@ export default function ReasoningWorkspace({
         <>
           {/* ── Post-update acknowledgement ─────────────── */}
           {updateStatus === "success" && graph && (
-            <UpdateAcknowledgement answer={answer} updateResult={result} />
+            <UpdateAcknowledgement answer={lastSubmittedAnswer} updateResult={result} />
           )}
 
           {/* Completion state (only when there is no next question and nothing remains) */}