fix(rectification): 区分不开时不显示「最可能」副标题（验收补改）

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

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

@@ -54,6 +54,8 @@ export function RectificationRangeDelivery({
   const recordConflict = delivery?.record_conflict ?? null;
   const caption = delivery?.narrow_hint ?? null;
   // D3: the range is the title; the representative minute is the subtitle.
+  // Hidden when the columns are indistinct (D4): 「最可能」 next to 「区分不开」
+  // would claim a lead the numbers do not have.
   const mostLikely = delivery?.representative_time ?? result.representativeTime;
   // D4: per-column numbers only when the first column leads by ≥ 5 points.
   const showPercents = rangeDeliveryShowsPercents(columns);
@@ -63,7 +65,7 @@ export function RectificationRangeDelivery({
     <section className="rectification-candidates rectification-range-delivery" aria-label="生时校正区间">
       <div className="rectification-candidates-heading">
         <strong>{title}</strong>
-        {mostLikely ? (
+        {mostLikely && !indistinct ? (
           <span className="rectification-range-delivery__most-likely">
             {rangeDeliveryMostLikely(mostLikely)}
           </span>