feat(ui): surface initial semantic reconstruction

components/reasoning-workspace.jsx

@@ -866,6 +866,10 @@ export default function ReasoningWorkspace({
   const [focusedPresentationItemId, setFocusedPresentationItemId] = useState(null);
   const [doneForNowIds, setDoneForNowIds] = useState([]);
 
+  // ── RTO.29D — post-Analyse initial reflection surface ─────────
+  const [initialReflectionActive, setInitialReflectionActive] = useState(false);
+  const [postAnalyseStatus, setPostAnalyseStatus] = useState(null);
+
   const { saveSession, loadSession } = useSessionPersistence();
 
   // Persist workspace state on every successful update (Phase 3)
@@ -1110,6 +1114,28 @@ export default function ReasoningWorkspace({
   const hasCurrentSummaryCondition =
     Boolean(propUnderstanding || graph?.currentSummary || result?.updatedSituationGraph?.currentSummary) || !hasSelectedQuestion;
 
+  // ── RTO.29D — manage initial reflection lifecycle ────────────
+  useEffect(() => {
+    const entering = status === "success" && hasGraph && propUnderstanding && !hasSelectedQuestion;
+    if (entering) {
+      setPostAnalyseStatus("success");
+      setInitialReflectionActive(true);
+    } else if (!entering && initialReflectionActive) {
+      // Leave initial reflection when something changes (user interacts, status shifts)
+      setInitialReflectionActive(false);
+      setPostAnalyseStatus(null);
+    }
+  }, [status, result, hasGraph]);
+
+  // Deactivate initial reflection when user does anything meaningful
+  useEffect(() => {
+    if (!initialReflectionActive) return;
+    if (selectedPresentationItemId || focusedPresentationItemId || investigationHistory.length > 0 || formulationStep !== "idle" || processingStep !== "idle") {
+      setInitialReflectionActive(false);
+      setPostAnalyseStatus(null);
+    }
+  }, [selectedPresentationItemId, focusedPresentationItemId, investigationHistory, formulationStep, processingStep]);
+
   return (
     <div className="space-y-6" data-testid="reasoning-workspace">
       {/* ── Loading overlays ─────────────────────────────── */}
@@ -1150,6 +1176,46 @@ export default function ReasoningWorkspace({
         </div>
       ) : (
         <>
+          {/* ── RTO.29D — initial post-Analyse reflection ──────── */}
+          {postAnalyseStatus === "success" && (
+            <div className="space-y-6" data-testid="initial-reflection-surface">
+              {/* What I understood */}
+              <div className="rounded-lg border border-blue-200/60 bg-blue-50/40 px-6 pt-5 pb-6">
+                <h2 className="mb-3 text-[11px] font-semibold tracking-widest uppercase text-gray-500">
+                  What I understood
+                </h2>
+                <p className="text-sm leading-relaxed text-gray-700">{propUnderstanding}</p>
+              </div>
+
+              {/* Initial proposed findings */}
+              <div className="space-y-3" data-testid="initial-proposed-findings">
+                <h2 className="text-[11px] font-semibold tracking-widest uppercase text-gray-500">
+                  Initial proposed findings
+                </h2>
+                {(() => {
+                  const resolvedIds = new Set(graph?.resolvedNodeIds || []);
+                  return (
+                    graph?.nodes?.map((node) =>
+                      node.kind === "unknown" && node.status !== "resolved" && !resolvedIds.has(node.id) ? (
+                        <button
+                          key={node.id}
+                          onClick={() => startFocused(node.id)}
+                          style={{ cursor: "pointer" }}
+                          className="w-full text-left rounded-lg border border-gray-200 bg-white px-5 py-4 transition hover:border-gray-300 hover:bg-gray-50"
+                        >
+                          <span className="block text-sm leading-relaxed text-gray-900">{node.label}</span>
+                          {node.description && node.description !== node.label && (
+                            <p className="mt-1.5 text-xs leading-snug text-gray-500">{node.description}</p>
+                          )}
+                        </button>
+                      ) : null,
+                    ) || []
+                  );
+                })()}
+              </div>
+            </div>
+          )}
+
           {/* ── Workspace grid: persistent whenever a graph exists ─── */}
           {(hasGraph || experimentalBranches) && (
             <div className="grid grid-cols-1 gap-6 lg:grid-cols-3">
@@ -1219,7 +1285,9 @@ export default function ReasoningWorkspace({
                 {/* Supporting context within conversation lane */}
                 {hasCurrentSummaryCondition && (
                   <>
+                    {postAnalyseStatus !== "success" && (
                       <CurrentUnderstandingCard currentSummary={graph?.currentSummary || result?.updatedSituationGraph?.currentSummary} plainLanguage={propUnderstanding || null} />
+                    )}
                     {/* ── Experiment 12: progress panel A / B / C toggle (temporary experimental UI) — de-emphasised by branch-as-context experiment RTO.25D */}
                     {hasGraph && (
                       <div className="hidden space-y-2">
@@ -1291,7 +1359,7 @@ export default function ReasoningWorkspace({
                       </p>
                     </div>
                   )}
-                  {graph && <OriginalSituation scenario={scenario} centralStatement={graph?.centralStatement} />}
+                  {graph && postAnalyseStatus !== "success" && <OriginalSituation scenario={scenario} centralStatement={graph?.centralStatement} />}
                   {/* RTO.25B — temporarily hidden to reduce competing navigation while branch-experiment is active */}
                   <div className="hidden">
                     <InvestigationMap turnCount={investigationHistory.length} />

components/scenario-form.jsx

@@ -852,7 +852,8 @@ export default function ScenarioForm() {
           })()}
         </div>
 
-            {/* Branch switcher (1/4 sidebar) */}
+            {/* Branch switcher (1/4 sidebar) — suppressed during initial reflection */}
+            {!((status === "success" && result?.situationGraph && !result?.selectedQuestion)) && (
               <div className="lg:col-span-1">
                 <ExperimentalBranchSwitcher
                   branches={BRANCHES}
@@ -869,6 +870,7 @@ export default function ScenarioForm() {
                   }}
                 />
               </div>
+            )}
           </div>
         </>
       )}