reorder: move Your Response next to Current Investigation

The response form now appears immediately after the active question
so the user can read and answer without scrolling. Everything else
becomes supporting context beneath the interaction area.

components/reasoning-workspace.jsx

@@ -479,13 +479,7 @@ export default function ReasoningWorkspace({
           {/* ── 2. Post-update acknowledgement ─────────────── */}
           {updateStatus === "success" && canAnswer && <UpdateAcknowledgement updateResult={result} />}
 
-          {/* ── 3. Current understanding ───────────────────── */}
-          {canAnswer && graph && <CurrentUnderstandingCard currentSummary={graph.currentSummary} />}
-
-          {/* ── 4. Investigation history ───────────────────── */}
-          <InvestigationHistory turns={investigationHistory} />
-
-          {/* ── 5. Response form (immediately after Current investigation) ─ */}
+          {/* ── 3. Response form ───────────────────────────── */}
           {canAnswer && (
             <form onSubmit={handleUpdateCaptureAndSubmit} className="space-y-4 rounded-lg border border-gray-200 bg-white p-5">
               <div>
@@ -517,6 +511,12 @@ export default function ReasoningWorkspace({
             </form>
           )}
 
+          {/* ── 4. Current understanding ───────────────────── */}
+          {canAnswer && graph && <CurrentUnderstandingCard currentSummary={graph.currentSummary} />}
+
+          {/* ── 5. Investigation history ───────────────────── */}
+          <InvestigationHistory turns={investigationHistory} />
+
           {/* ── 6. Original situation (collapsed by default) ─ */}
           <OriginalSituation scenario={scenario} centralStatement={graph?.centralStatement} />