fix(tradein/cian): rename chart key month_date→date + null-filter + typed ChartPoint

tradein-mvp/backend/app/schemas/trade_in.py

@@ -46,6 +46,13 @@ class AnalogLot(BaseModel):
     distance_m: int | None = None      # расстояние до целевой квартиры в метрах
 
 
+class CianChartPoint(BaseModel):
+    """Одна точка 7-месячного chart Cian Valuation Calculator."""
+
+    date: str
+    price: float
+
+
 class CianValuationSummary(BaseModel):
     """Cian Valuation Calculator данные для UI.
 
@@ -55,7 +62,7 @@ class CianValuationSummary(BaseModel):
 
     sale_price_rub: int | None = None
     rent_price_rub: int | None = None
-    chart: list[dict[str, Any]] = Field(default_factory=list)
+    chart: list[CianChartPoint] = Field(default_factory=list)
     chart_change_pct: float | None = None
     chart_change_direction: Literal["increase", "decrease", "neutral"] | None = None
 

tradein-mvp/backend/app/services/estimator.py

@@ -874,7 +874,14 @@ async def estimate_quality(
             CianValuationSummary(
                 sale_price_rub=int(cian_val.sale_price_rub) if cian_val.sale_price_rub else None,
                 rent_price_rub=int(cian_val.rent_price_rub) if cian_val.rent_price_rub else None,
-                chart=list(cian_val.chart or []),
+                chart=[
+                    {
+                        "date": p.get("month_date") or p.get("date") or "",
+                        "price": p["price"],
+                    }
+                    for p in (cian_val.chart or [])
+                    if p.get("price") is not None
+                ],
                 chart_change_pct=cian_val.chart_change_pct,
                 chart_change_direction=(
                     cian_val.chart_change_direction