feat(ui): RTO.31 ownership of focused contributions flows to scenario form

- Add focusedContributions state + appendFocusedContribution callback in ScenarioForm
- Contributions persist through session lifecycle (save/restore/restart)
- Pass onFocusedContribution and focusedContributions to ReasoningWorkspace
- Call onFocusedContribution on successful deconstruct with full result shape
- Test: contribution sequence, field preservation, same/different target coexistence

components/reasoning-workspace.jsx

@@ -840,6 +840,8 @@ export default function ReasoningWorkspace({
   onAnswerSubmit,
   lastSubmittedAnswer,
   onRestart,
+  focusedContributions,
+  onFocusedContribution,
 }) {
   const [investigationHistory, setInvestigationHistory] = useState([]);
   const turnCounter = useRef(0);
@@ -869,9 +871,10 @@ export default function ReasoningWorkspace({
         selectedQuestion: result.selectedQuestion,
         summary: result.summary || propUnderstanding,
         updatedAt: new Date().toISOString(),
+        focusedContributions,
       });
     }
-  }, [updateStatus, result]);
+  }, [updateStatus, result, focusedContributions]);
 
   // Capture the current selected question at submit time (not from a stale ref)
   const capturePendingTurn = (selectedQuestion, answerText) => {
@@ -1049,6 +1052,20 @@ export default function ReasoningWorkspace({
 
       if (!data.success) throw new Error(data.error || "Deconstruction failed");
 
+      // Persist contribution to case-level owner (ScenarioForm)
+      onFocusedContribution?.({
+        targetNodeId,
+        targetLabel: targetNode?.label || "",
+        targetDescription: targetNode?.description || "",
+        question: focused.question,
+        answer: answerText,
+        observations: data.observations,
+        uncertainties: data.uncertainties,
+        assumptions: data.assumptions,
+        relationships: data.relationships,
+        possibleFollowUpQuestions: data.possibleFollowUpQuestions,
+      });
+
       setProcessingStep("idle");
       setFocusedInvestigations((prev) => ({
         ...prev,

components/scenario-form.jsx

@@ -251,6 +251,16 @@ export default function ScenarioForm() {
   const [currentUnderstanding, setCurrentUnderstanding] = useState(null);
   const [mockScenario, setMockScenario] = useState("");
   const [hideFacilitatorOnLanding, setHideFacilitatorOnLanding] = useState(false);
+
+  /* ── RTO.31: focused contributions ownership ─────────────── */
+  const [focusedContributions, setFocusedContributions] = useState([]);
+
+  function appendFocusedContribution(contribution) {
+    setFocusedContributions((prev) => {
+      const seq = prev.length + 1;
+      return [...prev, { ...contribution, sequence: seq, id: `contrib-${String(seq).padStart(4, "0")}` }];
+    });
+  }
   const textareaRef = useRef(null);
 
   /* ── Valid investigation predicate ─────────────────────── */
@@ -269,6 +279,7 @@ export default function ScenarioForm() {
     setScenario(saved.scenario || "");
     setResult(hasGraph ? { ...saved, situationGraph: saved.situationGraph } : null);
     setCurrentUnderstanding(saved.summary || null);
+    setFocusedContributions(saved.focusedContributions || []);
 
     // Partial sessions (present but no graph) must NOT suppress the
     // scenario-entry form.  Only promote to success when there is actual
@@ -353,7 +364,7 @@ export default function ScenarioForm() {
         setCurrentUnderstanding(data.summary ?? null);
         const normalised = normaliseStartResult(data);
         setResult(normalised);
-        saveSession({ scenario, situationGraph: normalised.situationGraph, selectedQuestion: normalised.selectedQuestion, summary: data.summary ?? null, updatedAt: new Date().toISOString() });
+        saveSession({ scenario, situationGraph: normalised.situationGraph, selectedQuestion: normalised.selectedQuestion, summary: data.summary ?? null, updatedAt: new Date().toISOString(), focusedContributions });
       } else {
         setStatus("error");
         setCurrentUnderstanding(data.summary ?? null);
@@ -419,7 +430,7 @@ export default function ScenarioForm() {
         }));
         setAnswer("");
         // Persist after successful update turn
-        saveSession({ scenario, situationGraph: outcome.updatedSituationGraph, selectedQuestion: normaliseUpdateSelectedQuestion(outcome.selectedQuestion), summary: outcome.summary ?? currentUnderstanding, updatedAt: new Date().toISOString() });
+        saveSession({ scenario, situationGraph: outcome.updatedSituationGraph, selectedQuestion: normaliseUpdateSelectedQuestion(outcome.selectedQuestion), summary: outcome.summary ?? currentUnderstanding, updatedAt: new Date().toISOString(), focusedContributions });
       } else {
         setUpdateStatus("error");
         setUpdateError(outcome);
@@ -575,6 +586,8 @@ export default function ScenarioForm() {
                 setAnswer={setAnswer}
                 onAnswerSubmit={handleUpdate}
                 lastSubmittedAnswer={lastSubmittedAnswer}
+                focusedContributions={focusedContributions}
+                onFocusedContribution={appendFocusedContribution}
                 onRestart={() => {
                   clearSession();
                   setStatus("idle");
@@ -585,6 +598,7 @@ export default function ScenarioForm() {
                   setLastSubmittedAnswer("");
                   setCurrentUnderstanding(null);
                   setUpdateError(null);
+                  setFocusedContributions([]);
                 }}
               />
             </div>
@@ -594,7 +608,7 @@ export default function ScenarioForm() {
 
       {/* ── Continue later banner when session was restored ── */}
       {status === "success" && result?.updatedAt && (
-        <ContinueLaterBanner onRestart={() => { clearSession(); setStatus("idle"); setResult(null); setAnswer(""); setUpdateStatus("idle"); setCurrentUnderstanding(null); }} />
+        <ContinueLaterBanner onRestart={() => { clearSession(); setStatus("idle"); setResult(null); setAnswer(""); setUpdateStatus("idle"); setCurrentUnderstanding(null); setFocusedContributions([]); }} />
       )}
 
       {/* Reset button after successful analysis */}
@@ -612,6 +626,7 @@ export default function ScenarioForm() {
               setLastSubmittedAnswer("");
               setCurrentUnderstanding(null);
               setUpdateError(null);
+              setFocusedContributions([]);
             }}
             className="rounded-lg border border-gray-200/60 px-4 py-2 text-sm font-medium text-gray-500 transition hover:bg-gray-50/80"
           >