fix(rectification): label declared birth time as record or estimate (BUG-690)

Hospital records, family estimates and period-only windows now keep distinct copy on the board and range card. Scoring still uses the reported clock as the search-window centre. Hospital minutes outside the current range are stated with the offset and no preference.

frontend/src/app/globals.css

@@ -3396,6 +3396,12 @@ input:not([type="radio"]):not([type="checkbox"]):not([class^="ant-"]):not([class
   font-size: var(--type-body-md);
   line-height: 1.65;
 }
+.rectification-range-delivery__provenance {
+  margin: 0;
+  color: var(--color-ink-secondary);
+  font-size: var(--type-caption);
+  line-height: 1.5;
+}
 .rectification-range-delivery__boundary {
   margin: 0;
   color: var(--color-ink-secondary);

frontend/src/components/rectification-agentic-chat.tsx

@@ -73,6 +73,7 @@ import {
   persistedQuestionSurface,
   interviewStopReasonFromSnapshot,
   interviewSessionOutcomeFromSnapshot,
+  birthTimeSourceFromSnapshot,
   type RectificationCaseSnapshotPayload,
 } from "@/lib/rectification-surface-state";
 import { RectificationTimeline } from "@/components/rectification-timeline";
@@ -394,6 +395,7 @@ type CaseSnapshotState = Readonly<{
   stage: RectificationTimelineStage | null;
   interviewStopReason: string | null;
   interviewSessionOutcome: string | null;
+  birthTimeSource: ReturnType<typeof birthTimeSourceFromSnapshot>;
 }>;
 
 function nextUserActionIdFromSnapshot(payload: RectificationCaseSnapshotPayload | null): string | null {
@@ -419,6 +421,7 @@ function caseSnapshotState(payload: RectificationCaseSnapshotPayload | null): Ca
     stage: caseStageFromSnapshot(payload.case?.stage),
     interviewStopReason: interviewStopReasonFromSnapshot(payload),
     interviewSessionOutcome: interviewSessionOutcomeFromSnapshot(payload),
+    birthTimeSource: birthTimeSourceFromSnapshot(payload),
   };
 }
 
@@ -464,6 +467,7 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
   const [nextUserActionId, setNextUserActionId] = useState<string | null>(() => caseSnapshotState(initialSnapshot)?.nextUserActionId ?? null);
   const [interviewStopReason, setInterviewStopReason] = useState<string | null>(() => caseSnapshotState(initialSnapshot)?.interviewStopReason ?? null);
   const [interviewSessionOutcome, setInterviewSessionOutcome] = useState<string | null>(() => caseSnapshotState(initialSnapshot)?.interviewSessionOutcome ?? null);
+  const [birthTimeSource, setBirthTimeSource] = useState(() => caseSnapshotState(initialSnapshot)?.birthTimeSource ?? birthTimeSourceFromSnapshot(initialSnapshot));
   const [caseSnapshotLoaded, setCaseSnapshotLoaded] = useState(initialSnapshot !== null);
   const [questionRetryAttempts, setQuestionRetryAttempts] = useState(0);
   const [questionRepairAttempts, setQuestionRepairAttempts] = useState(0);
@@ -637,6 +641,7 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
     setNextUserActionId(nextActionId || null);
     setInterviewStopReason(interviewStopReasonFromSnapshot(snapshot));
     setInterviewSessionOutcome(interviewSessionOutcomeFromSnapshot(snapshot));
+    setBirthTimeSource(birthTimeSourceFromSnapshot(snapshot));
     setCaseSnapshotLoaded(true);
     if (nextQuestion || nextChoice || acceptedTime || confirmedTime) {
       setQuestionRepairAttempts(0);
@@ -1683,6 +1688,7 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
     <RectificationBoardPeek
       result={candidateResult}
       declaredTime={declaredTime}
+      birthTimeSource={birthTimeSource}
       expanded={boardOpen}
       boardId={boardId}
       onOpen={toggleBoard}
@@ -1988,6 +1994,7 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
       <RectificationBoard
         result={candidateResult}
         declaredTime={declaredTime}
+        birthTimeSource={birthTimeSource}
         savedStatus={savedStatus}
         diff={boardDiff}
         compact={compactBoard}

frontend/src/components/rectification-board.tsx

@@ -39,6 +39,7 @@ function LayerChips({ layers }: Readonly<{ layers: readonly WindowScanLayer[] }>
 function RectificationBoardBody({
   result,
   declaredTime,
+  birthTimeSource,
   savedStatus,
   diff,
   compact,
@@ -47,6 +48,7 @@ function RectificationBoardBody({
 }: Readonly<{
   result: RectificationCandidateResult | null;
   declaredTime: string | null;
+  birthTimeSource?: string | null;
   savedStatus: "accepted" | "confirmed" | null;
   diff: RectificationBoardDiff;
   compact: boolean;
@@ -55,7 +57,7 @@ function RectificationBoardBody({
 }>) {
   const table = result ? workingRectificationHouseTable(result) : null;
   const workingTime = workingRectificationTime(result);
-  const emptyCopy = rectificationBoardEmptyCopy(declaredTime);
+  const emptyCopy = rectificationBoardEmptyCopy(declaredTime, birthTimeSource);
   const grouped = result ? groupWindowTransitions(result.windowTransitions) : [];
   const scoringMinutes = grouped.filter((row) => row.scoringLayers.length > 0);
   const displayMinutes = grouped.filter((row) => row.displayLayers.length > 0);
@@ -220,6 +222,7 @@ function RectificationBoardBody({
 export function RectificationBoard({
   result,
   declaredTime,
+  birthTimeSource,
   savedStatus,
   diff,
   compact,
@@ -230,6 +233,7 @@ export function RectificationBoard({
 }: Readonly<{
   result: RectificationCandidateResult | null;
   declaredTime: string | null;
+  birthTimeSource?: string | null;
   savedStatus: "accepted" | "confirmed" | null;
   diff: RectificationBoardDiff;
   compact: boolean;
@@ -265,6 +269,7 @@ export function RectificationBoard({
       <RectificationBoardBody
         result={result}
         declaredTime={declaredTime}
+        birthTimeSource={birthTimeSource}
         savedStatus={savedStatus}
         diff={diff}
         compact={compact}
@@ -287,17 +292,19 @@ export function RectificationBoard({
 export function RectificationBoardPeek({
   result,
   declaredTime = null,
+  birthTimeSource,
   expanded,
   boardId,
   onOpen,
 }: Readonly<{
   result: RectificationCandidateResult | null;
   declaredTime?: string | null;
+  birthTimeSource?: string | null;
   expanded: boolean;
   boardId: string;
   onOpen: () => void;
 }>) {
-  const peek = rectificationBoardPeekCopy(result, declaredTime);
+  const peek = rectificationBoardPeekCopy(result, declaredTime, birthTimeSource);
   return (
     <button
       className="rectification-board-peek"

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

@@ -65,6 +65,9 @@ export function RectificationRangeDelivery({
           {RECTIFICATION_USER_COPY.rangeDeliveryCollectClosed}
         </p>
       ) : null}
+      {delivery?.provenance_line ? (
+        <p className="rectification-range-delivery__provenance">{delivery.provenance_line}</p>
+      ) : null}
       {delivery?.tie_break_available && onTieBreak && !readonly ? (
         <button
           type="button"

frontend/src/lib/rectification-agentic/birth-time-provenance.ts

@@ -0,0 +1,113 @@
+/**
+ * User-facing labels for the declared birth-time source.
+ * Scoring still uses reportedBirthTime as the search-window centre.
+ */
+
+export const PROVENANCE_SOURCES = ["hospital_record", "approximate", "period_only"] as const;
+
+export type ProvenanceSource = (typeof PROVENANCE_SOURCES)[number];
+
+const CLOCK = /^(?:[01]\d|2[0-3]):[0-5]\d$/;
+
+export function normalizeBirthTimeSource(value: string | null | undefined): ProvenanceSource {
+  if (value === "hospital_record") return "hospital_record";
+  if (value === "period_only") return "period_only";
+  return "approximate";
+}
+
+export const REPORTED_TIME_LABEL: Readonly<Record<ProvenanceSource, string>> = {
+  hospital_record: "你的出生记录时间",
+  approximate: "你填的大概时间",
+  period_only: "你给的时间段",
+};
+
+/** Approximate / period_only copy must not match this. Hospital uses 出生记录时间. */
+export const FORBIDDEN_DECLARED_BIRTH_TIME_PHRASE = /你的出生时间/;
+
+export function reportedTimeLabel(source: string | null | undefined): string {
+  return REPORTED_TIME_LABEL[normalizeBirthTimeSource(source)];
+}
+
+export function boardDeclaredTimeLine(time: string, source?: string | null): string {
+  const kind = normalizeBirthTimeSource(source);
+  if (kind === "hospital_record") return `出生记录时间 ${time}`;
+  if (kind === "period_only") return `你给的时间段 ${time}`;
+  return `你填的大概时间 ${time}`;
+}
+
+export function boardDeclaredTimePeek(time: string, source?: string | null): string {
+  const kind = normalizeBirthTimeSource(source);
+  if (kind === "hospital_record") return `出生记录 ${time}`;
+  if (kind === "period_only") return `时间段 ${time}`;
+  return `大概 ${time}`;
+}
+
+function clockMinutes(value: string): number | null {
+  const clock = value.trim().slice(0, 5);
+  if (!CLOCK.test(clock)) return null;
+  const hours = Number(clock.slice(0, 2));
+  const minutes = Number(clock.slice(3, 5));
+  return hours * 60 + minutes;
+}
+
+export function minutesBetweenClocks(left: string, right: string): number | null {
+  const start = clockMinutes(left);
+  const end = clockMinutes(right);
+  if (start == null || end == null) return null;
+  return Math.abs(start - end);
+}
+
+function clockInRange(clock: string, range: readonly [string, string]): boolean {
+  const time = clockMinutes(clock);
+  const start = clockMinutes(range[0]);
+  const end = clockMinutes(range[1]);
+  if (time == null || start == null || end == null) return false;
+  return time >= Math.min(start, end) && time <= Math.max(start, end);
+}
+
+function offsetMinutes(reported: string, range: readonly [string, string] | null, representative: string | null): number | null {
+  if (representative) {
+    const direct = minutesBetweenClocks(reported, representative);
+    if (direct != null) return direct;
+  }
+  if (!range) return null;
+  if (clockInRange(reported, range)) return 0;
+  const toStart = minutesBetweenClocks(reported, range[0]);
+  const toEnd = minutesBetweenClocks(reported, range[1]);
+  if (toStart == null) return toEnd;
+  if (toEnd == null) return toStart;
+  return Math.min(toStart, toEnd);
+}
+
+/**
+ * How the declared clock sits next to the current range. Null when there is
+ * no comparable minute (typical for period_only).
+ */
+export function reportedTimeOffsetCopy(input: {
+  source?: string | null;
+  reportedTime?: string | null;
+  range?: readonly [string, string] | null;
+  representativeTime?: string | null;
+}): string | null {
+  const reported = (input.reportedTime ?? "").trim().slice(0, 5);
+  if (!CLOCK.test(reported)) return null;
+  const source = normalizeBirthTimeSource(input.source);
+  const offset = offsetMinutes(reported, input.range ?? null, input.representativeTime ?? null);
+  if (offset == null) return null;
+  if (source === "hospital_record") {
+    const inside = input.range ? clockInRange(reported, input.range) : offset === 0;
+    if (inside) return `出生记录时间 ${reported}，落在目前范围内`;
+    const edge = input.range
+      ? Math.min(
+        minutesBetweenClocks(reported, input.range[0]) ?? Number.POSITIVE_INFINITY,
+        minutesBetweenClocks(reported, input.range[1]) ?? Number.POSITIVE_INFINITY,
+      )
+      : offset;
+    const gap = Number.isFinite(edge) ? edge : offset;
+    return `出生记录时间 ${reported}。目前范围不含这一分钟，相差 ${gap} 分钟`;
+  }
+  if (source === "period_only") {
+    return `与你给的时间段参照 ${reported} 相差 ${offset} 分钟`;
+  }
+  return `与你填的大概时间 ${reported} 相差 ${offset} 分钟`;
+}

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

@@ -25,6 +25,7 @@ import {
   REPRESENTATIVE_MINUTE_DISCLAIMER,
   nonConvergingRangeNarration,
 } from "../user-copy.ts";
+import { normalizeBirthTimeSource, type ProvenanceSource } from "../birth-time-provenance.ts";
 
 export { REPRESENTATIVE_MINUTE_DISCLAIMER, nonConvergingRangeNarration };
 
@@ -199,6 +200,8 @@ export type RectificationDecision = Readonly<{
   terminationCopy?: string | null;
   /** Close lead with unused D9/D10 style questions: ask those before delivering. */
   heldForTieBreak?: boolean;
+  /** Declared-time source for copy. Missing means approximate. */
+  birthTimeSource?: "hospital_record" | "approximate" | "period_only";
 }>;
 
 export type DecideRectificationInput = Readonly<{
@@ -930,6 +933,7 @@ export function publicNextAction(decision: RectificationDecision): Readonly<{
   representative_time: string | null;
   credible_range: readonly [string, string] | null;
   stop_reason: EvidenceStopReason | null;
+  birth_time_source?: ProvenanceSource;
 }> {
   return {
     type: decision.nextAction,
@@ -945,6 +949,7 @@ export function publicNextAction(decision: RectificationDecision): Readonly<{
     representative_time: decision.representativeTime,
     credible_range: decision.credibleRange,
     stop_reason: decision.stopReason ?? null,
+    birth_time_source: normalizeBirthTimeSource(decision.birthTimeSource),
   };
 }
 

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

@@ -8,6 +8,11 @@
 
 import { PROBE_EXPLAIN_COPY } from "./v9/probe-explain.ts";
 import { STEP_STATE_COPY } from "./v9/step-state.ts";
+import {
+  REPORTED_TIME_LABEL,
+  boardDeclaredTimeLine,
+  reportedTimeOffsetCopy,
+} from "./birth-time-provenance.ts";
 
 export const REPRESENTATIVE_MINUTE_DISCLAIMER = "这只是代表性候选，不是已确认的唯一出生分钟。";
 
@@ -606,6 +611,23 @@ export function listUserVisibleCopy(): string[] {
     ...Object.values(USER_COLLECT_QUESTION_RETRY),
     "还有吗？比如第一份工作、搬到别的城市、谈恋爱或分手、家里添丁或长辈住院。",
     "再说一件带年月的事",
+    REPORTED_TIME_LABEL.hospital_record,
+    REPORTED_TIME_LABEL.approximate,
+    REPORTED_TIME_LABEL.period_only,
+    boardDeclaredTimeLine("05:00", "hospital_record"),
+    boardDeclaredTimeLine("05:00", "approximate"),
+    reportedTimeOffsetCopy({
+      source: "approximate",
+      reportedTime: "05:00",
+      range: ["04:48", "05:07"],
+      representativeTime: "04:53",
+    }) ?? "",
+    reportedTimeOffsetCopy({
+      source: "hospital_record",
+      reportedTime: "05:12",
+      range: ["04:48", "05:07"],
+      representativeTime: "04:53",
+    }) ?? "",
   ];
   return values;
 }

frontend/src/lib/rectification-agentic/v9/case-dossier-response.ts

@@ -18,6 +18,7 @@ import { rangeDeliveryForSnapshot } from "@/lib/rectification-agentic/v9/diverge
 import { rectificationFollowupCatalog } from "@/lib/rectification-agentic/v9/decision-from-dossier";
 import { tieBreakGateInput, tieBreakPersonalityAvailable } from "@/lib/rectification-agentic/v9/method-followup";
 import { latestResultToolProjection } from "@/mastra/rectification-v9-tools";
+import { normalizeBirthTimeSource } from "@/lib/rectification-agentic/birth-time-provenance";
 
 export function dossierResponse(
   dossier: V9CaseDossier,
@@ -31,6 +32,7 @@ export function dossierResponse(
   const listed = options.listed ?? { focuses: [] as const, available: true };
   const turnsWithQuestions = attachQuestionsToTurns(dossier.turns, listed.focuses);
   const fields = publicDecisionFields(decision);
+  const birthTimeSource = normalizeBirthTimeSource(dossier.case.birthTimeSource);
   const overlaid = dossier.latestResult
     ? overlayPublicDecision(dossier.latestResult, decision)
     : fields;
@@ -55,6 +57,7 @@ export function dossierResponse(
       completed_at: dossier.case.completedAt,
       closed_reason: dossier.case.closedReason,
       last_activity_at: dossier.case.lastActivityAt,
+      birth_time_source: birthTimeSource,
       case_revision: previousInferenceFromReceipt(dossier.latestResult?.decisionReceipt ?? null)?.revision ?? 0,
     },
     turns: turns.map((turn) => ({
@@ -75,6 +78,7 @@ export function dossierResponse(
       : null,
     interview: {
       ...fields,
+      birth_time_source: birthTimeSource,
       collection_progress: collectionProgressFromReceipt(dossier.latestResult?.decisionReceipt ?? null),
     },
     current_question: projectCurrentQuestion(dossier.conversationSummary.activeFocus),
@@ -121,6 +125,8 @@ function publicLatestResult(
       key.includes("varga.d9") || key.includes("varga.d10")
     )),
     stillTied: decision.separation.lead <= 1 && decision.separation.ranked.length >= 2,
+    reportedBirthTime: dossier.case.reportedBirthTime,
+    birthTimeSource: dossier.case.birthTimeSource,
   });
   const withDelivery = {
     ...projected,

frontend/src/lib/rectification-agentic/v9/decision-from-dossier.ts

@@ -64,6 +64,7 @@ import {
 import { evidenceLedgerFingerprint } from "./tool-service";
 import { followupCaseArgs, blockScanDeclinedForFingerprint } from "./block-scan.ts";
 import { openingRangeFromCandidateRange } from "../user-copy.ts";
+import { normalizeBirthTimeSource } from "../birth-time-provenance.ts";
 import {
   representativeNearWindowEdge,
 } from "./search-window.ts";
@@ -926,6 +927,7 @@ export function decideFromDossier(
       ...narrowingExhaustion(dossier, inference, options, catalog),
     }),
     droppedProbes: mergeDroppedProbes(gated.dropped, nakshatra.dropped),
+    birthTimeSource: normalizeBirthTimeSource(dossier.case.birthTimeSource),
   };
 }
 
@@ -971,30 +973,33 @@ export function decideAfterInferenceChange(input: {
   if (!input.state) {
     const evidenceStops = evidenceStopInputs(input.dossier.evidence);
     const caseStage = input.dossier.case.stage === "block_scan" ? "block_scan" : "minute";
-    return decideRectification({
-      methodCoverageAll: blockingMethodsCovered(collecting.methods),
-      trainingGateOpen: caseStage === "block_scan"
-        ? evidenceStops.datedEventCount >= MIN_STANDALONE_DATED_EVENTS
-          && evidenceStops.datedDomainCount >= MIN_STANDALONE_DATED_DOMAINS
-        : trainingScoreableGate(input.dossier.evidence).open,
-      candidateScores: [],
-      userStopped: input.userStopped,
-      snapshotCurrent,
-      engineCeiling: engineCapabilityCeilingFromReceipt(input.dossier.latestResult?.decisionReceipt ?? null),
-      ...decisionBudgetFromInference(null),
-      ...evidenceStops,
-      caseStage: input.dossier.case.stage === "block_scan" ? "block_scan" : "minute",
-      blockScanDeclined: blockScanDeclinedForFingerprint(
-        input.dossier.case.blockScan,
-        evidenceLedgerFingerprint(input.dossier.evidence as never),
-      ),
-      windowWidenSuggested: windowWidenSuggestedFromDossier(
-        input.dossier,
-        evidenceLedgerFingerprint(input.dossier.evidence as never),
-      ),
-      openingCandidateRange: openingRangeFromCandidateRange(input.dossier.case.candidateRange),
-      ...tieBreakHold,
-    });
+    return {
+      ...decideRectification({
+        methodCoverageAll: blockingMethodsCovered(collecting.methods),
+        trainingGateOpen: caseStage === "block_scan"
+          ? evidenceStops.datedEventCount >= MIN_STANDALONE_DATED_EVENTS
+            && evidenceStops.datedDomainCount >= MIN_STANDALONE_DATED_DOMAINS
+          : trainingScoreableGate(input.dossier.evidence).open,
+        candidateScores: [],
+        userStopped: input.userStopped,
+        snapshotCurrent,
+        engineCeiling: engineCapabilityCeilingFromReceipt(input.dossier.latestResult?.decisionReceipt ?? null),
+        ...decisionBudgetFromInference(null),
+        ...evidenceStops,
+        caseStage: input.dossier.case.stage === "block_scan" ? "block_scan" : "minute",
+        blockScanDeclined: blockScanDeclinedForFingerprint(
+          input.dossier.case.blockScan,
+          evidenceLedgerFingerprint(input.dossier.evidence as never),
+        ),
+        windowWidenSuggested: windowWidenSuggestedFromDossier(
+          input.dossier,
+          evidenceLedgerFingerprint(input.dossier.evidence as never),
+        ),
+        openingCandidateRange: openingRangeFromCandidateRange(input.dossier.case.candidateRange),
+        ...tieBreakHold,
+      }),
+      birthTimeSource: normalizeBirthTimeSource(input.dossier.case.birthTimeSource),
+    };
   }
   const training = input.state.events.filter((item) => item.usage === "training");
   const trainingDomains = new Set(training.map((item) => item.domain));
@@ -1075,6 +1080,7 @@ export function decideAfterInferenceChange(input: {
       ...narrowingExhaustion(input.dossier, input.state, undefined, catalog),
     }),
     droppedProbes: mergeDroppedProbes(gated.dropped, nakshatra.dropped),
+    birthTimeSource: normalizeBirthTimeSource(input.dossier.case.birthTimeSource),
   };
 }
 

frontend/src/lib/rectification-agentic/v9/divergence-panel.ts

@@ -18,6 +18,7 @@ import {
   rangeDeliveryWindowLine,
   sharedTraitLine,
 } from "../user-copy.ts";
+import { reportedTimeOffsetCopy } from "../birth-time-provenance.ts";
 import { previousInferenceFromReceipt } from "./inference-adapter.ts";
 import {
   rangeNarrowHint,
@@ -84,6 +85,7 @@ export type RangeDeliveryProjection = Readonly<{
   narrow_hint: string | null;
   tie_break_available: boolean;
   tie_break_note: string | null;
+  provenance_line: string | null;
 }>;
 
 export type PublicCandidateClock = Readonly<{
@@ -338,6 +340,8 @@ export function buildRangeDelivery(input: {
   tieBreakAvailable?: boolean;
   tieBreakUsed?: boolean;
   stillTied?: boolean;
+  reportedBirthTime?: string | null;
+  birthTimeSource?: string | null;
 }): RangeDeliveryProjection {
   const inference = input.inference;
   const range = input.credibleRange
@@ -428,6 +432,12 @@ export function buildRangeDelivery(input: {
       && input.stillTied === true
       ? RECTIFICATION_USER_COPY.rangeDeliveryTieBreakUsed
       : null,
+    provenance_line: reportedTimeOffsetCopy({
+      source: input.birthTimeSource,
+      reportedTime: input.reportedBirthTime,
+      range: normalizedRange,
+      representativeTime,
+    }),
   };
 }
 
@@ -488,6 +498,10 @@ export function rangeDeliveryForSnapshot(snapshot: {
   tieBreakAvailable?: boolean;
   tieBreakUsed?: boolean;
   stillTied?: boolean;
+  reportedBirthTime?: string | null;
+  reported_birth_time?: string | null;
+  birthTimeSource?: string | null;
+  birth_time_source?: string | null;
 } | null | undefined): RangeDeliveryProjection {
   const receipt = snapshot?.decisionReceipt ?? snapshot?.decision_receipt ?? null;
   const inference = previousInferenceFromReceipt(receipt);
@@ -520,6 +534,8 @@ export function rangeDeliveryForSnapshot(snapshot: {
     tieBreakAvailable: snapshot?.accepted !== true && snapshot?.tieBreakAvailable === true,
     tieBreakUsed: snapshot?.tieBreakUsed === true,
     stillTied: snapshot?.stillTied === true,
+    reportedBirthTime: snapshot?.reportedBirthTime ?? snapshot?.reported_birth_time,
+    birthTimeSource: snapshot?.birthTimeSource ?? snapshot?.birth_time_source,
   });
 }
 
@@ -667,5 +683,10 @@ export function parseRangeDelivery(value: unknown): RangeDeliveryProjection | nu
       : typeof row.tieBreakNote === "string" && row.tieBreakNote.trim()
         ? row.tieBreakNote.trim()
         : null,
+    provenance_line: typeof row.provenance_line === "string" && row.provenance_line.trim()
+      ? row.provenance_line.trim()
+      : typeof row.provenanceLine === "string" && row.provenanceLine.trim()
+        ? row.provenanceLine.trim()
+        : null,
   };
 }

frontend/src/lib/rectification-board-model.ts

@@ -10,6 +10,7 @@ import {
   type RectificationCandidateResult,
   type RectificationHouseTable,
 } from "./rectification-candidate-result";
+import { boardDeclaredTimePeek } from "./rectification-agentic/birth-time-provenance";
 
 export const RECTIFICATION_BOARD_SPLIT_MIN_PX = 768;
 
@@ -163,6 +164,7 @@ export function diffRectificationBoard(
 export function rectificationBoardPeekCopy(
   result: RectificationCandidateResult | null,
   declaredTime: string | null = null,
+  source?: string | null,
 ): Readonly<{
   title: string;
   detail: string | null;
@@ -171,7 +173,10 @@ export function rectificationBoardPeekCopy(
   if (!table) {
     // Before any candidate exists the board still has a time to show: the one
     // the reader declared. Without one, say what fills it later.
-    return { title: "当前盘面", detail: declaredTime ? `填报 ${declaredTime}` : "补充经历后会在这里更新" };
+    return {
+      title: "当前盘面",
+      detail: declaredTime ? boardDeclaredTimePeek(declaredTime, source) : "补充经历后会在这里更新",
+    };
   }
   return { title: "当前盘面", detail: `${table.time} · 上升${table.lagna}` };
 }

frontend/src/lib/rectification-surface-state.ts

@@ -11,6 +11,11 @@
 import type { PersistedRectificationTurn } from "../components/conversational-birth-time-rectification.tsx";
 import { BOOTSTRAP_PREPARE_TIMEOUT_MS } from "./home-bootstrap.ts";
 import { sessionOutcomeAllowsDelivery } from "./rectification-agentic/core/rectification-decision.ts";
+import {
+  boardDeclaredTimeLine,
+  normalizeBirthTimeSource,
+  type ProvenanceSource,
+} from "./rectification-agentic/birth-time-provenance.ts";
 
 /**
  * Upper bound on hydrating a Case (turns + snapshot) after `/cases/open`
@@ -82,6 +87,7 @@ export type RectificationCaseSnapshotPayload = Readonly<{
      */
     candidate_range?: unknown;
     stage?: unknown;
+    birth_time_source?: unknown;
   }>;
   turns?: unknown;
 }>;
@@ -469,7 +475,10 @@ export function rectificationAdoptingLabel(time: string): string {
 }
 
 /** Board copy when no candidate result exists yet (task 1.3). */
-export function rectificationBoardEmptyCopy(declaredTime: string | null): Readonly<{
+export function rectificationBoardEmptyCopy(
+  declaredTime: string | null,
+  source?: string | null,
+): Readonly<{
   clock: string | null;
   lines: readonly string[];
 }> {
@@ -478,10 +487,15 @@ export function rectificationBoardEmptyCopy(declaredTime: string | null): Readon
   }
   return {
     clock: declaredTime,
-    lines: [`填报出生时间 ${declaredTime}`, "回答几个问题后，这里会显示宫位随时间的变化。"],
+    lines: [boardDeclaredTimeLine(declaredTime, source), "回答几个问题后，这里会显示宫位随时间的变化。"],
   };
 }
 
+export function birthTimeSourceFromSnapshot(payload: RectificationCaseSnapshotPayload | null | undefined): ProvenanceSource {
+  const raw = payload?.case?.birth_time_source;
+  return normalizeBirthTimeSource(typeof raw === "string" ? raw : null);
+}
+
 /** The declared birth minute from the profile, or null when only a period was given. */
 export function declaredBirthTime(profile: Readonly<{ time?: string; reportedTime?: string }>): string | null {
   const candidate = (profile.reportedTime || profile.time || "").trim();