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

@@ -564,9 +564,19 @@ export default function TradeInV2Page() {
   const restoreLoading = restoreActive && restored.isPending;
 
   const loading = mutation.isPending || restoreLoading;
-  const insufficient =
-    estimate != null &&
-    (estimate.insufficient_data || estimate.n_analogs === 0);
+  // fix (v2 honest-price display) — `insufficient_data` is the ONE honest
+  // "no answer" signal from the backend (@computed_field = median_price_rub
+  // <= 0, see backend/app/schemas/trade_in.py). `n_analogs === 0` alone used
+  // to be folded into this same flag, but the backend can (and, since the
+  // deals fallback expanded in PR #2629, routinely does) return a real
+  // median_price_rub computed from Rosreestr deals (ДКП) when there are zero
+  // LISTING analogs — v1 and the PDF export already render that as a normal
+  // result. Treating n_analogs === 0 as "insufficient" here hid a real,
+  // honest price behind "недостаточно данных" for every such estimate (23
+  // existing Серов estimates were already stuck in this state). See
+  // mapResultPanel's `dealsOnlyPrice` for how the result panel discloses the
+  // deals-only source instead of mislabelling it as "по объявлениям".
+  const insufficient = estimate != null && estimate.insufficient_data;
   const apiError = mutation.error?.message ?? null;
   // M4: estimate-dependent meta/controls (the «ДЕЙСТВИТЕЛЕН ДО» validity line,
   // «КАК РАССЧИТАНО», PDF) only render once there is a real, sufficient estimate.

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

@@ -342,6 +342,27 @@ export function ObjectSummary({
               {data.summary.quality.cv}
             </span>
           </div>
+          {/* M1 audit #2583 — backend's own honest explanation for the
+              confidence tier above (e.g. "расширили радиус до 2 км из-за
+              нехватки данных"). Was computed by the backend but never shown
+              anywhere in v2 (v1 showed it). Rendered visibly, not just as a
+              hover tooltip (mirrored in ResultPanel's ДОСТОВЕРНОСТЬ) — this
+              rail has room, and this is the more likely place a user actually
+              reads "почему такая достоверность". undefined → nothing renders. */}
+          {data.summary.quality.confidenceExplanation && (
+            <div
+              style={{
+                marginTop: 8,
+                paddingTop: 8,
+                borderTop: `1px solid ${tokens.lineSoft2}`,
+                fontSize: 9.5,
+                lineHeight: 1.5,
+                color: tokens.muted2,
+              }}
+            >
+              {data.summary.quality.confidenceExplanation}
+            </div>
+          )}
         </div>
       </div>
     </div>

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

@@ -157,7 +157,13 @@ export default function ResultPanel({
               {data.meta.sources}
             </b>
           </span>
-          <span>
+          <span
+            // M1 audit #2583 — native hover tooltip carrying the backend's own
+            // confidence_explanation (e.g. "расширили радиус до 2 км из-за
+            // нехватки данных"), same zero-layout-cost title= pattern as
+            // HeroBar's location-index disclaimer. undefined → no tooltip.
+            title={data.meta.confidenceExplanation}
+          >
             ДОСТОВЕРНОСТЬ: <b style={{ color: ink }}>{data.meta.confidence}</b>
           </span>
           <span>

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

@@ -419,6 +419,34 @@ function KpiCell({
   );
 }
 
+// fix (v2 honest-price display, item 3) — an empty `rows` array used to still
+// render the header row via DataTable (visibleCols keeps every column when
+// rows.length === 0, see above), so a genuinely empty analog/deal set painted
+// a table with column headers and zero body rows — reading as a broken or
+// still-loading table, not an honest "there is nothing here". Shown instead
+// of DataTable when rows are empty; `hint` explains WHY when the caller has
+// one (e.g. n_analogs === 0 → price came from Rosreestr deals instead).
+function EmptyTableNote({ text, hint }: { text: string; hint?: string }) {
+  return (
+    <div
+      style={{
+        padding: "22px 18px",
+        fontSize: 11,
+        lineHeight: 1.5,
+        color: tokens.muted,
+        textAlign: "center",
+      }}
+    >
+      {text}
+      {hint && (
+        <div style={{ marginTop: 4, fontSize: 10, color: tokens.muted2 }}>
+          {hint}
+        </div>
+      )}
+    </div>
+  );
+}
+
 /** Header row + body rows wrapped in role="table"; columns are pre-filtered. */
 function DataTable<R>({
   label,
@@ -558,16 +586,29 @@ export default function SourcesView({
           ))}
         </div>
 
-        <DataTable
-          label="Объявления — аналогичные квартиры в продаже"
-          cols={adCols}
-          rows={data.adRows}
-          grid={adGrid}
-        />
+        {data.adRows.length > 0 ? (
+          <DataTable
+            label="Объявления — аналогичные квартиры в продаже"
+            cols={adCols}
+            rows={data.adRows}
+            grid={adGrid}
+          />
+        ) : (
+          <EmptyTableNote
+            text="Похожих объявлений в продаже не найдено."
+            hint={
+              estimate != null && !estimate.insufficient_data
+                ? "Цена по этому адресу рассчитана по сделкам Росреестра — см. блок ниже."
+                : undefined
+            }
+          />
+        )}
 
         {/* Fix #1/#8 — discloses the top-10 display cap vs. the true n_analogs
-            total (mirrors the deals-table footer below) + any outlier exclusion. */}
-        {data.adsFootnote && (
+            total (mirrors the deals-table footer below) + any outlier exclusion.
+            Skipped when the table above is already an EmptyTableNote — "Показано
+            0 из 0 объявлений" adds nothing once the empty note already said so. */}
+        {data.adRows.length > 0 && data.adsFootnote && (
           <div
             style={{
               padding: "11px 18px",
@@ -618,24 +659,29 @@ export default function SourcesView({
           />
         </div>
 
-        <DataTable
-          label="Фактические сделки по аналогичным квартирам"
-          cols={dealCols}
-          rows={data.dealRows}
-          grid={dealGrid}
-        />
-
-        <div
-          style={{
-            padding: "11px 18px",
-            fontSize: "10px",
-            color: tokens.hint,
-            background: KPI_BG,
-          }}
-        >
-          Показано {data.dealRows.length} из {data.marketDeals.kpi.count}{" "}
-          фактических сделок
-        </div>
+        {data.dealRows.length > 0 ? (
+          <>
+            <DataTable
+              label="Фактические сделки по аналогичным квартирам"
+              cols={dealCols}
+              rows={data.dealRows}
+              grid={dealGrid}
+            />
+            <div
+              style={{
+                padding: "11px 18px",
+                fontSize: "10px",
+                color: tokens.hint,
+                background: KPI_BG,
+              }}
+            >
+              Показано {data.dealRows.length} из {data.marketDeals.kpi.count}{" "}
+              фактических сделок
+            </div>
+          </>
+        ) : (
+          <EmptyTableNote text="Сделок по этому адресу за 12 месяцев не найдено." />
+        )}
       </div>
     </div>
   );

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

@@ -1049,17 +1049,36 @@ export function mapResultPanel(
     e.expected_sold_price_rub != null &&
     Number.isFinite(e.expected_sold_price_rub);
 
+  // fix (v2 honest-price display) — zero LISTING analogs no longer means
+  // "недостаточно данных" (see page.tsx's `insufficient`, now =
+  // estimate.insufficient_data only):
+  // when the backend still returned a real median_price_rub with n_analogs
+  // === 0, it computed that price from Rosreestr deals (ДКП), not asking
+  // listings (the deals fallback expanded in PR #2629). The headline card
+  // must say so — labelling it "В ОБЪЯВЛЕНИИ / по объявлениям" here would be
+  // dishonest in the other direction (claiming a listings-based price that
+  // doesn't exist).
+  const dealsOnlyPrice = e.n_analogs === 0 && !e.insufficient_data;
+
   const cards: ResultCard[] = [
     {
-      title: ["РЕКОМЕНДОВАННАЯ ЦЕНА", "В ОБЪЯВЛЕНИИ"],
+      title: dealsOnlyPrice
+        ? ["РЕКОМЕНДОВАННАЯ ЦЕНА", "ПО СДЕЛКАМ РОСРЕЕСТРА"]
+        : ["РЕКОМЕНДОВАННАЯ ЦЕНА", "В ОБЪЯВЛЕНИИ"],
       value: fmtMln(e.median_price_rub),
       unit: "млн ₽",
       range: rangeLine(e.range_low_rub, e.range_high_rub),
-      ppm: `${fmtPpm(e.median_price_per_m2)} · по объявлениям`,
+      ppm: dealsOnlyPrice
+        ? `${fmtPpm(e.median_price_per_m2)} · по сделкам Росреестра`
+        : `${fmtPpm(e.median_price_per_m2)} · по объявлениям`,
+      note: dealsOnlyPrice
+        ? "Похожих объявлений в продаже не нашлось — цена рассчитана по сделкам Росреестра (ДКП) в этом районе"
+        : undefined,
       // Fix #1/#8: bin over the SAME outlier-guarded pool the spread/CV uses
       // (meta.cv below) — otherwise the histogram spans [min,max] INCLUDING the
       // 872k выброс this card already reports as "исключён", squashing the real
       // analogs into the left bins while the number says the outlier is dropped.
+      // dealsOnlyPrice → e.analogs is empty → bins8([]) → [] (no bars drawn).
       bars: bins8(guardPriceOutliers(e.analogs.map((a) => a.price_per_m2)).clean),
       nav: 2,
     },
@@ -1139,6 +1158,10 @@ export function mapResultPanel(
   const meta: ResultMeta = {
     sources: `${activeSourceCount(e)} / ${TOTAL_SOURCES}`,
     confidence: CONFIDENCE_RU[e.confidence].toUpperCase(),
+    // M1 audit #2583 — real backend explanation, was computed but never read
+    // by v2 (v1 showed it). trim(): backend sometimes sends "" rather than
+    // null for "no explanation" — an empty tooltip string is worse than none.
+    confidenceExplanation: e.confidence_explanation?.trim() || undefined,
     cv: cvStr(guardPriceOutliers(e.analogs.map((a) => a.price_per_m2)).clean),
     builtOn,
     sourcesNote,
@@ -1250,6 +1273,9 @@ export function mapSummary(
     quality: {
       sources: `${activeSourceCount(e)} / ${TOTAL_SOURCES}`,
       confidence: CONFIDENCE_RU[e.confidence],
+      // M1 audit #2583 — see ResultMeta.confidenceExplanation doc (mapResultPanel
+      // above) for the full rationale; same source field, same trim() guard.
+      confidenceExplanation: e.confidence_explanation?.trim() || undefined,
       cv: cvStr(guardPriceOutliers(e.analogs.map((a) => a.price_per_m2)).clean),
     },
   };

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

@@ -66,6 +66,15 @@ export interface ResultCard {
 export interface ResultMeta {
   sources: string;
   confidence: string;
+  /**
+   * M1 audit #2583 — backend's own honest explanation of the
+   * confidence tier (e.g. "расширили радиус до 2 км из-за нехватки данных").
+   * Was computed by the backend but never surfaced anywhere in v2 (the old
+   * v1 interface showed it). Rendered as a hover tooltip on ДОСТОВЕРНОСТЬ
+   * (mirrors HeroBar's location-index disclaimer pattern) — undefined/empty
+   * hides the tooltip, never a fabricated caveat.
+   */
+  confidenceExplanation?: string;
   cv: string;
   /** Data-driven footer provenance, e.g. "ПОСТРОЕНО ПО 6 АНАЛОГАМ И 10 СДЕЛКАМ". */
   builtOn?: string;
@@ -146,6 +155,8 @@ export interface SummaryRow {
 export interface SummaryQuality {
   sources: string;
   confidence: string;
+  /** Same backend confidence_explanation as ResultMeta — see that field's doc. */
+  confidenceExplanation?: string;
   cv: string;
 }