fix(rectification): keep choice options and scoring on the server

Agent set-focus was writing or dropping choice schema, so probes never scored. Force server-owned options, fail closed when focus list RPC errors, and require the probe year in spokenPrompt.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/app/api/rectification/cases/[caseId]/route.ts

@@ -10,7 +10,8 @@ import {
   receiptStatusFromTurn,
   RectificationToolServiceError,
   listV10ConversationFocuses,
-  type ConversationFocus,
+  questionSourceFromFocusList,
+  type ConversationFocusList,
   type V9CaseDossier,
 } from "@/lib/rectification-agentic/v9/tool-service";
 import { choiceCardFromCaseDossier, decideFromDossier, overlayPublicDecision } from "@/lib/rectification-agentic/v9/interview-state";
@@ -72,8 +73,8 @@ export async function GET(request: Request, context: RouteContext) {
         }
       }),
     );
-    const focuses = await listV10ConversationFocuses(accounting, user.id, caseId);
-    return NextResponse.json(dossierResponse(dossier, receipts, skillIdentity, { fullDetail, focuses }));
+    const listed = await listV10ConversationFocuses(accounting, user.id, caseId);
+    return NextResponse.json(dossierResponse(dossier, receipts, skillIdentity, { fullDetail, listed }));
   } catch (error) {
     if (error instanceof RectificationToolServiceError) {
       const message = error.message;
@@ -88,16 +89,17 @@ export async function GET(request: Request, context: RouteContext) {
   }
 }
 
-function dossierResponse(
+export function dossierResponse(
   dossier: V9CaseDossier,
   receipts: Array<Awaited<ReturnType<typeof loadV9TurnReceipt>>>,
   skillIdentity: Awaited<ReturnType<typeof loadV9CaseSkillIdentityStatus>>,
-  options: { fullDetail?: boolean; focuses?: readonly ConversationFocus[] } = {},
+  options: { fullDetail?: boolean; listed?: ConversationFocusList } = {},
 ) {
   const decision = decideFromDossier(dossier, {
     currentEvidenceFingerprint: evidenceLedgerFingerprint(dossier.evidence),
   });
-  const turns = attachQuestionsToTurns(dossier.turns, options.focuses ?? []);
+  const listed = options.listed ?? { focuses: [] as const, available: true };
+  const turns = attachQuestionsToTurns(dossier.turns, listed.focuses);
   return {
     case: {
       case_id: dossier.case.caseId,
@@ -131,6 +133,7 @@ function dossierResponse(
     interview: publicDecisionFields(decision),
     current_question: projectCurrentQuestion(dossier.conversationSummary.activeFocus),
     choice_card: choiceCardFromCaseDossier(dossier),
+    question_source: questionSourceFromFocusList(listed),
   };
 }