fix(rectification): delivery gate turn skips text the last reply already said (BUG-1153)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017eEAG8HD3mm8gsKXgk8uU8

frontend/src/lib/rectification-agentic/v9/answer-choice.ts

@@ -209,6 +209,11 @@ export async function persistExhaustionGateTurn(input: {
   if (input.resultId) {
     markDeliveryTurn({ caseId: input.caseId, resultId: input.resultId });
   }
+  // BUG-1153: the answered choice's own reply often already carries this delivery text
+  // (「已记录，…」 + the same sentences). Once BUG-1149 let the gate turn persist, the same
+  // narration showed twice. The gate only fills a gap; it never repeats the last reply.
+  const dossier = await loadV9CaseDossier(input.accounting, input.userId, input.caseId);
+  if (narrationAlreadyInLastAssistant(input.hostNarration, dossier)) return;
   await persistV9DeterministicTurn(input.accounting, input.userId, input.caseId, {
     requestId: exhaustionGateRequestId(input.askedTurnId, input.caseId),
     userMessage: null,
@@ -1288,6 +1293,24 @@ export async function persistNextInterviewAfterChoice(input: {
   };
 }
 
+export function narrationAlreadyInLastAssistant(
+  narration: string,
+  dossier: { turns?: readonly { role?: string; text?: string | null }[] },
+): boolean {
+  const squash = (value: string) => value.replace(/\s+/g, "");
+  const needle = squash(narration);
+  if (needle.length < 8) return false;
+  const turns = dossier.turns ?? [];
+  for (let index = turns.length - 1; index >= 0; index -= 1) {
+    const turn = turns[index];
+    if (turn?.role !== "assistant") continue;
+    const text = typeof turn.text === "string" ? squash(turn.text) : "";
+    if (!text) continue;
+    return text.includes(needle);
+  }
+  return false;
+}
+
 function stemAlreadyInLastAssistant(
   stem: string,
   dossier: { turns?: readonly { role?: string; text?: string | null }[] },