fix(rectification): invite another dated event instead of saying the pool is closed (BUG-689)

When the seven collect lines are closed, the range card still appears, but the copy asks for one more exact-day event of any kind instead of saying the questions are finished. A new dated event after delivery stales the snapshot so the session does not stay delivered.

frontend/src/app/globals.css

@@ -3390,6 +3390,12 @@ input:not([type="radio"]):not([type="checkbox"]):not([class^="ant-"]):not([class
 .rectification-range-delivery__tie-break:disabled {
   cursor: default;
 }
+.rectification-range-delivery__invite {
+  margin: 0;
+  color: var(--color-ink);
+  font-size: var(--type-body-md);
+  line-height: 1.65;
+}
 .rectification-range-delivery__boundary {
   margin: 0;
   color: var(--color-ink-secondary);

frontend/src/components/rectification-range-delivery.tsx

@@ -4,7 +4,9 @@ import type { RectificationCandidateResult } from "@/lib/rectification-candidate
 import {
   RECTIFICATION_USER_COPY,
   REPRESENTATIVE_MINUTE_DISCLAIMER,
+  rangeDeliveryCaptionWithoutClosedInvite,
   rangeDeliveryEventCopy,
+  rangeDeliveryShowsOpenCollectInvite,
 } from "@/lib/rectification-agentic/user-copy";
 import type { RangeDeliveryProjection } from "@/lib/rectification-agentic/v9/divergence-panel";
 import { RectificationVerificationReport } from "@/components/rectification-verification-report";
@@ -40,14 +42,28 @@ export function RectificationRangeDelivery({
   const markdown = delivery?.verification_markdown
     ?? result.verificationReportMarkdown;
   const sharedTraits = delivery?.shared_traits ?? [];
+  const showOpenCollectInvite = rangeDeliveryShowsOpenCollectInvite({
+    hint: delivery?.narrow_hint,
+    columns,
+  });
+  const caption = showOpenCollectInvite || delivery?.narrow_hint?.includes(
+    RECTIFICATION_USER_COPY.rangeDeliveryCollectClosed,
+  )
+    ? rangeDeliveryCaptionWithoutClosedInvite(delivery?.narrow_hint)
+    : delivery?.narrow_hint ?? null;
 
   return (
     <section className="rectification-candidates rectification-range-delivery" aria-label="生时校正区间">
       <div className="rectification-candidates-heading">
         <strong>{title}</strong>
       </div>
-      {delivery?.narrow_hint ? (
-        <p className="rectification-range-delivery__narrow">{delivery.narrow_hint}</p>
+      {caption ? (
+        <p className="rectification-range-delivery__narrow">{caption}</p>
+      ) : null}
+      {showOpenCollectInvite ? (
+        <p className="rectification-range-delivery__invite">
+          {RECTIFICATION_USER_COPY.rangeDeliveryCollectClosed}
+        </p>
       ) : null}
       {delivery?.tie_break_available && onTieBreak && !readonly ? (
         <button

frontend/src/lib/rectification-agentic/core/rectification-decision.ts

@@ -342,9 +342,11 @@ export function decideRectification(input: DecideRectificationInput): Rectificat
 
   if (input.snapshotCurrent === false) {
     if (probe && !userStopped && input.trainingGateOpen !== false) {
-      return discriminateOrExhaust(input, separation, holdout, range, probe, rangeDeliveryCapability, stopReason);
+      return discriminateOrExhaust(input, separation, holdout, range, probe, rangeDeliveryCapability);
     }
-    return collect(separation, holdout, range, probe, capability, stopReason);
+    // New dated evidence makes the snapshot stale. Do not carry exhaustion
+    // stop reasons into collect: those would keep the UI in the delivered gap.
+    return collect(separation, holdout, range, probe, capability);
   }
   if (
     stopClass?.kind === "exhausted"

frontend/src/lib/rectification-agentic/user-copy.ts

@@ -112,6 +112,25 @@ export const USER_COLLECT_QUESTION_RETRY: Readonly<Record<string, string>> = {
   health_pressure: "身体或压力这边再问一次：哪年生病、受伤，或特别难熬？",
 };
 
+/** Exact-day examples asked first after the seven targeted-collect lines close. */
+export const RANGE_DELIVERY_OPEN_COLLECT_DAY_EXAMPLES = [
+  "登记结婚那天",
+  "入职第一天",
+  "手术那天",
+  "孩子出生那天",
+  "拿到录取通知那天",
+] as const;
+
+/** Year-month examples outside the seven targeted-collect lines. */
+export const RANGE_DELIVERY_OPEN_COLLECT_EXAMPLES = [
+  "换专业",
+  "出国",
+  "打官司",
+  "创业",
+  "重病",
+  "亲人离世",
+] as const;
+
 export const RECTIFICATION_USER_COPY = {
   genericCollectQuestion: GENERIC_COLLECT_QUESTION,
   collectQuestionByDomain: USER_COLLECT_QUESTION,
@@ -149,10 +168,39 @@ export const RECTIFICATION_USER_COPY = {
   rangeDeliveryTieBreakEntry: "再答两道参考题微调排序",
   rangeDeliveryTieBreakAck: "只微调排序，不改目前范围。",
   rangeDeliveryTieBreakUsed: "这两分钟按现有信息分不开，参考题已经用过。",
-  rangeDeliveryCollectClosed: "能问的都问完了",
+  rangeDeliveryCollectClosed: `这两分钟按现有信息分不开。你要是还记得确切哪一天的事，不限领域，说出来我接着算——${RANGE_DELIVERY_OPEN_COLLECT_DAY_EXAMPLES.join("、")}都成。记不得哪一天的，有年月也行，比如${RANGE_DELIVERY_OPEN_COLLECT_EXAMPLES.join("、")}。`,
   verificationReportSummary: "查看验证报告",
 } as const;
 
+/** Top-two relative-likelihood gap, in percentage points, that counts as a tie on the range card. */
+export const RANGE_DELIVERY_TIE_PERCENT = 3;
+
+export function rangeDeliveryTopTwoTied(
+  columns: readonly { probability_percent: number }[],
+): boolean {
+  if (columns.length < 2) return false;
+  return Math.abs(columns[0].probability_percent - columns[1].probability_percent)
+    <= RANGE_DELIVERY_TIE_PERCENT;
+}
+
+export function rangeDeliveryCaptionWithoutClosedInvite(
+  hint: string | null | undefined,
+): string | null {
+  if (!hint) return null;
+  const invite = RECTIFICATION_USER_COPY.rangeDeliveryCollectClosed;
+  if (!hint.includes(invite)) return hint;
+  const stripped = hint.replaceAll(invite, "").replace(/[。．]\s*$/u, "").trim();
+  return stripped.length > 0 ? stripped : null;
+}
+
+export function rangeDeliveryShowsOpenCollectInvite(input: {
+  hint: string | null | undefined;
+  columns: readonly { probability_percent: number }[];
+}): boolean {
+  const invite = RECTIFICATION_USER_COPY.rangeDeliveryCollectClosed;
+  return Boolean(input.hint?.includes(invite) && rangeDeliveryTopTwoTied(input.columns));
+}
+
 export const RANGE_DELIVERY_DOMAIN_LABEL: Readonly<Record<string, string>> = {
   education: "学业",
   career: "事业",