fix(rectification): keep same-sentence dated events after structured answers

The choice and collect fast paths applied the answer then returned,
so a dated event in the same utterance never reached the evidence
ledger. Idle persist also prechecked follow-up with a hardcoded
collect_evidence outcome instead of the dossier decision.

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

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

@@ -30,6 +30,7 @@ import {
   classifyRectificationTurnIntent,
   optionIdForAnswerClass,
   shouldDeclineCollectFocus,
+  shouldContinueAgentForDatedEvent,
 } from "@/lib/rectification-agentic/v9/turn-intent-classifier";
 import { persistServerOwnedFocus, openQuestionFromPersistedFocus, isCollectFocusSchema } from "@/lib/rectification-agentic/v9/server-focus";
 import { buildMethodFollowupPlan } from "@/lib/rectification-agentic/v9/method-followup";
@@ -348,6 +349,7 @@ export async function POST(request: Request) {
           if (!optionId) {
             return completedMessageResponse("当前问题已更新，请刷新后重新作答。", requestId, caseId);
           }
+          const continueToAgent = shouldContinueAgentForDatedEvent(classified);
           const previous = previousInferenceFromReceipt(dossier.latestResult?.decisionReceipt ?? null);
           const applied = await applyRectificationChoice(accounting, {
             userId,
@@ -363,8 +365,11 @@ export async function POST(request: Request) {
             optionId,
             expectedRevision: previous?.revision ?? 0,
             userDisplay: parsed.data.message ?? null,
+            deferFollowup: continueToAgent,
           });
-          return completedMessageResponse(applied.narration, requestId, caseId);
+          if (!continueToAgent) {
+            return completedMessageResponse(applied.narration, requestId, caseId);
+          }
         }
         if (classified.intent === "stop_rectification") {
           const previous = previousInferenceFromReceipt(dossier.latestResult?.decisionReceipt ?? null);
@@ -399,17 +404,21 @@ export async function POST(request: Request) {
           classified = null;
         }
         if (shouldDeclineCollectFocus(classified)) {
+          const continueToAgent = shouldContinueAgentForDatedEvent(classified);
           const applied = await applyCollectFocusDenial(accounting, {
             userId,
             caseId,
             focusId: focus.id,
+            deferFollowup: continueToAgent,
           });
-          await persistV9DeterministicTurn(accounting, userId, caseId, {
-            requestId,
-            userMessage: parsed.data.message ?? null,
-            assistantMessage: applied.narration,
-          });
-          return completedMessageResponse(applied.narration, requestId, caseId);
+          if (!continueToAgent) {
+            await persistV9DeterministicTurn(accounting, userId, caseId, {
+              requestId,
+              userMessage: parsed.data.message ?? null,
+              assistantMessage: applied.narration,
+            });
+            return completedMessageResponse(applied.narration, requestId, caseId);
+          }
         }
       } else {
         let birthDate: string | null = null;