fix(rectification): honor declared birth-time uncertainty and split windows over two hours (BUG-571–573)

Intake stores how sure the user is; rectification now searches that range, offers a one-click widen when event fit is low at the edge, and trisects windows longer than two hours before the minute grid.

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

frontend/src/components/birth-time-intake.tsx

@@ -5,11 +5,13 @@ import { BirthDatePicker } from "@/components/birth-date-picker";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { birthTimeConsultationOptionsCopy } from "@/lib/birth-time-consultation-consent";
 import {
+  approximateUncertaintyOptions,
   birthTimeDisplayState,
   birthTimeSourceDefaults,
   birthTimeSourceOptions,
   type BirthTimeDraft,
   type BirthTimeDraftPatch,
+  type BirthTimeSource,
 } from "@/lib/birth-time-intake-model";
 
 type BirthTimeIntakeProps = {
@@ -79,13 +81,20 @@ export function BirthTimeIntakeFields({ value, onPatch }: BirthTimeIntakeProps)
   const source = value.birthTimeSource;
   const isConfirmed = value.birthTimeStatus === "confirmed";
   const displayState = birthTimeDisplayState(value);
-  const knowledgeMode = source === "period_only" || source === "unknown"
-    ? "uncertain"
-    : source ? "exact" : "";
+  const selectedSourceOption: BirthTimeSource | "" = source === "family_exact" || source === "approximate"
+    ? "approximate"
+    : source === "unknown"
+      ? "period_only"
+      : source === "hospital_record" || source === "period_only"
+        ? source
+        : "";
   const usesClockTime = source === "hospital_record"
     || source === "family_exact"
     || source === "approximate"
     || source === "legacy_import";
+  const approximateRadius = source === "family_exact"
+    ? 15
+    : value.uncertaintyBeforeMinutes;
 
   return (
     <div className="birth-time-intake">
@@ -126,20 +135,16 @@ export function BirthTimeIntakeFields({ value, onPatch }: BirthTimeIntakeProps)
       )}
 
       {!isConfirmed && <fieldset className="birth-time-source-fieldset">
-        <legend>你对出生时间了解多少？</legend>
-        <p className="birth-time-source-intro">不用猜具体分钟，先选一个最符合你的情况的选项。</p>
+        <legend>你对这个时间有多确定？</legend>
+        <p className="birth-time-source-intro">只用在这里问一次。校正会按你选的范围去比，不再追问你有多确定。</p>
         <div className="birth-time-source-list">
           {birthTimeSourceOptions.map((option) => (
             <label
-              className={`birth-time-source-option ${option.value === "family_exact"
-                ? knowledgeMode === "exact" ? "is-selected" : ""
-                : knowledgeMode === "uncertain" ? "is-selected" : ""}`}
+              className={`birth-time-source-option ${option.value === selectedSourceOption ? "is-selected" : ""}`}
               key={option.value}
             >
               <input
-                checked={option.value === "family_exact"
-                  ? knowledgeMode === "exact"
-                  : knowledgeMode === "uncertain"}
+                checked={option.value === selectedSourceOption}
                 name={`birth-time-source-${groupId}`}
                 type="radio"
                 value={option.value}
@@ -172,6 +177,32 @@ export function BirthTimeIntakeFields({ value, onPatch }: BirthTimeIntakeProps)
           {source === "hospital_record" && (
             <p className="birth-time-detail-note">系统会无感检查前后 2 分钟的上升与 D9 / D10 稳定性。</p>
           )}
+          {(source === "approximate" || source === "family_exact") && (
+            <fieldset className="birth-time-uncertainty-fieldset">
+              <legend>选一个最接近的范围</legend>
+              <div className="birth-time-uncertainty-list">
+                {approximateUncertaintyOptions.map((option) => (
+                  <button
+                    className={`birth-time-uncertainty-option ${approximateRadius === option.minutes ? "is-selected" : ""}`}
+                    key={option.minutes}
+                    type="button"
+                    onClick={() => onPatch(
+                      option.minutes === 15 && source === "family_exact"
+                        ? {
+                          uncertaintyBeforeMinutes: 0,
+                          uncertaintyAfterMinutes: 0,
+                        }
+                        : {
+                          birthTimeSource: "approximate",
+                          uncertaintyBeforeMinutes: option.minutes,
+                          uncertaintyAfterMinutes: option.minutes,
+                        },
+                    )}
+                  >{option.label}</button>
+                ))}
+              </div>
+            </fieldset>
+          )}
         </div>
       )}