feat(tradein/v2): срок экспозиции подстрокой в карточке «Ожидаемая цена сделки» (#2639)

tradein-mvp/frontend/src/app/v2/page.tsx

@@ -599,8 +599,9 @@ export default function TradeInV2Page() {
     [locationIndexData],
   );
   const resultPanelData = useMemo(
-    () => (estimate ? mapResultPanel(estimate, streetDealsData) : null),
-    [estimate, streetDealsData],
+    () =>
+      estimate ? mapResultPanel(estimate, streetDealsData, analyticsData) : null,
+    [estimate, streetDealsData, analyticsData],
   );
   const summaryData = useMemo(
     () =>

tradein-mvp/frontend/src/components/trade-in/v2/ResultPanel.tsx

@@ -484,6 +484,7 @@ export default function ResultPanel({
               // M2 — calm delta pill (was a 51px circular gauge that read like a
               // tech "занижение" indicator). Full text «−18% к цене объявления»,
               // neutral accentDeep on a soft-blue chip, tabular-nums.
+              <>
               <div
                 style={{
                   display: "flex",
@@ -549,6 +550,20 @@ export default function ResultPanel({
                   Подробнее <span>→</span>
                 </button>
               </div>
+              {card.exposureNote && (
+                <div
+                  style={{
+                    fontSize: 9,
+                    color: muted2,
+                    marginTop: 4,
+                    lineHeight: 1.4,
+                    maxWidth: "82%",
+                  }}
+                >
+                  {card.exposureNote}
+                </div>
+              )}
+              </>
             )}
           </div>
           );

tradein-mvp/frontend/src/components/trade-in/v2/mappers.ts

@@ -1038,6 +1038,7 @@ export function mapMarkers(e: AggregatedEstimate | null): MapMarker[] {
 export function mapResultPanel(
   e: AggregatedEstimate,
   streetDeals?: StreetDealsResponse | null,
+  analytics?: HouseAnalyticsResponse | null,
 ): ResultPanelData {
   const dealTier = resolveDealTier(e, streetDeals);
 
@@ -1105,6 +1106,13 @@ export function mapResultPanel(
       emptyNote: hasExpected
         ? undefined
         : "Недостаточно данных для прогноза цены сделки — ориентируйтесь на рекомендованную цену в объявлении",
+      // Median exposure days (house/district), from house_placement_history —
+      // gated on hasExpected: when the card has no forecast it renders only
+      // emptyNote (see above), the exposure aside has nowhere honest to sit.
+      exposureNote:
+        hasExpected && analytics?.kpi?.median_exposure_days != null
+          ? `срок продажи ~${analytics.kpi.median_exposure_days} дн`
+          : undefined,
       note:
         hasExpected &&
         dealTier != null &&

tradein-mvp/frontend/src/components/trade-in/v2/types.ts

@@ -55,6 +55,8 @@ export interface ResultCard {
   deltaLabel?: string;
   /** Reconciliation note under the value (card 2: expected price vs ДКП median). */
   note?: string;
+  /** Медиана срока экспозиции по дому/району (house_placement_history), подстрока карточки 2. */
+  exposureNote?: string;
   /** H1 empty-state message: when set (card 2, no expected-sold prediction) the
    *  card renders this instead of value/range/ppm/delta, and the panel moves the
    *  accent frame onto the «рекомендованная цена» card. */