fix: keep original situation visible in workspace

components/reasoning-workspace.jsx

@@ -233,22 +233,20 @@ function InvestigationHistory({ turns }) {
   );
 }
 
-// ── Original situation (collapsed by default) ─────────────────
+// ── Original situation (always-visible reference card) ────────
 function OriginalSituation({ scenario, centralStatement }) {
   if (!scenario) return null;
 
   return (
-    <details className="rounded-lg border border-gray-200 bg-gray-50">
-      <summary className="cursor-pointer px-5 py-3 text-sm font-medium text-gray-600 hover:text-gray-800">
+    <div className="rounded-lg border border-gray-200 bg-gray-50/70 px-5 py-4">
+      <h2 className="mb-2 text-xs font-bold uppercase tracking-widest text-gray-400">
         Original situation
-      </summary>
-      <div className="border-t border-gray-200 px-5 pb-4 pt-3 space-y-3">
-        {centralStatement && (
-          <p className="text-sm text-gray-600 italic">{centralStatement}</p>
-        )}
-        <p className="whitespace-pre-wrap text-sm text-gray-800">{scenario}</p>
-      </div>
-    </details>
+      </h2>
+      {centralStatement && (
+        <p className="mb-1 text-xs text-gray-400">{centralStatement}</p>
+      )}
+      <p className="whitespace-pre-wrap text-sm leading-relaxed text-gray-700">{scenario}</p>
+    </div>
   );
 }
 
@@ -514,12 +512,12 @@ export default function ReasoningWorkspace({
           {/* ── 4. Current understanding ───────────────────── */}
           {canAnswer && graph && <CurrentUnderstandingCard currentSummary={graph.currentSummary} />}
 
-          {/* ── 5. Investigation history ───────────────────── */}
-          <InvestigationHistory turns={investigationHistory} />
-
-          {/* ── 6. Original situation (collapsed by default) ─ */}
+          {/* ── 5. Original situation (always-visible reference) ─ */}
           <OriginalSituation scenario={scenario} centralStatement={graph?.centralStatement} />
 
+          {/* ── 6. Investigation history ───────────────────── */}
+          <InvestigationHistory turns={investigationHistory} />
+
           {/* ── 7. Developer details (collapsed by default) ── */}
           {(status === "success" || status === "error") && graph && (
             <DeveloperDetails