fix(rectification): ask spoken collect questions in the agent body

The standalone collect prompt bar reused the choice-card chrome and
duplicated the question. Visibility now comes from the spoken reply,
with an empty-body fallback that posts the persisted focus prompt.

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

frontend/src/app/api/rectification/agent/route.ts

@@ -10,7 +10,12 @@ import {
   transitionV9CaseStatus,
 } from "@/lib/rectification-agentic/v9/tool-service";
 import { decideFromDossier, rectificationFollowupCatalog } from "@/lib/rectification-agentic/v9/decision-from-dossier";
-import { applyRectificationChoice, applyCollectFocusDenial, persistNextInterviewIfIdle } from "@/lib/rectification-agentic/v9/answer-choice";
+import {
+  applyRectificationChoice,
+  applyCollectFocusDenial,
+  persistNextInterviewIfIdle,
+  persistEmptyCollectSpokenAssistant,
+} from "@/lib/rectification-agentic/v9/answer-choice";
 import { mapRectificationRpcError } from "@/lib/rectification-agentic/v9/case-service";
 import { CHOICE_ACTION, STOP_ACTION } from "@/lib/rectification-agentic/v9/choice-action";
 import { runV9AgentTurn, type V9RunBilling } from "@/lib/rectification-agentic/v9/agent-run";
@@ -674,6 +679,22 @@ export async function POST(request: Request) {
                 `[rectification-v9] persist next interview after turn failed case=${caseId} reason=${error instanceof Error ? error.name : "Unknown"}`,
               );
             }
+            if (!result.answerText.trim()) {
+              try {
+                const fallback = await persistEmptyCollectSpokenAssistant({
+                  accounting: accounting as never,
+                  userId,
+                  caseId,
+                  requestId: crypto.randomUUID(),
+                  answerText: result.answerText,
+                });
+                if (fallback) send({ type: "answer.delta", text: fallback });
+              } catch (error) {
+                console.warn(
+                  `[rectification-v9] empty collect spoken fallback failed case=${caseId} reason=${error instanceof Error ? error.name : "Unknown"}`,
+                );
+              }
+            }
           }
           send({ type: "done", emitted: true });
         }