fix(tradein): cian detail-парсер не извлекал kitchen_area_m2 из offer.kitchenArea

Добавлено поле kitchen_area_m2 в DetailEnrichment dataclass,
извлечение через _parse_float(offer.get("kitchenArea")) в fetch_detail,
и COALESCE(CAST(:ka AS double precision), kitchen_area_m2) в UPDATE listings
внутри save_detail_enrichment.

Имя поля kitchenArea — стандартное cian offer API (live-verify не делался,
прокси недоступен в dev-окружении).

Closes #1553

tradein-mvp/backend/app/services/scrapers/cian_detail.py

@@ -44,6 +44,7 @@ class DetailEnrichment:
     ceiling_height: float | None = None  # meters
     repair_type: str | None = None  # 'cosmetic' / 'design' / 'no' — raw Cian value
     repair_state: str | None = None  # enum: needs_repair/standard/good/excellent
+    kitchen_area_m2: float | None = None  # offer.kitchenArea (м²)
     views_total: int | None = None  # Cian stats.totalViewsFormattedString → int
     views_today: int | None = None
 
@@ -119,6 +120,7 @@ async def fetch_detail(
             ceiling_height=_parse_float(offer.get("ceilingHeight")),
             repair_type=_extract_repair_type(offer),
             repair_state=_extract_repair_state(offer),
+            kitchen_area_m2=_parse_float(offer.get("kitchenArea")),
             raw_offer=offer,
         )
 
@@ -259,6 +261,7 @@ def save_detail_enrichment(db: Session, listing_id: int, enrichment: DetailEnric
                 ceiling_height     = COALESCE(:ch,  ceiling_height),
                 repair_type        = COALESCE(:rt,  repair_type),
                 repair_state       = COALESCE(:rs,  repair_state),
+                kitchen_area_m2    = COALESCE(CAST(:ka AS double precision), kitchen_area_m2),
                 views_total        = COALESCE(:vt,  views_total),
                 views_today        = COALESCE(:vd,  views_today)
             WHERE id = CAST(:lid AS bigint)
@@ -271,6 +274,7 @@ def save_detail_enrichment(db: Session, listing_id: int, enrichment: DetailEnric
             "ch": enrichment.ceiling_height,
             "rt": enrichment.repair_type,
             "rs": enrichment.repair_state,
+            "ka": enrichment.kitchen_area_m2,
             "vt": enrichment.views_total,
             "vd": enrichment.views_today,
         },
@@ -376,8 +380,7 @@ def save_detail_enrichment(db: Session, listing_id: int, enrichment: DetailEnric
 
     db.commit()
     logger.info(
-        "Cian detail enrichment saved for listing_id=%s "
+        "Cian detail enrichment saved for listing_id=%s (price_changes=%d, agent=%s, snapshot=%s)",
-        "(price_changes=%d, agent=%s, snapshot=%s)",
         listing_id,
         len(enrichment.price_changes),
         bool(enrichment.agent_profile),

tradein-mvp/backend/tests/test_cian_detail.py

@@ -1,4 +1,5 @@
 """Tests for cian_detail.py — Stage 5 of CianScraper v1."""
+
 from __future__ import annotations
 
 from unittest.mock import AsyncMock, MagicMock
@@ -12,6 +13,7 @@ from app.services.scrapers.cian_detail import (
     _extract_repair_state,
     _parse_views,
     fetch_detail,
+    save_detail_enrichment,
 )
 
 # ── _parse_views ──────────────────────────────────────────────────────────────
@@ -349,3 +351,115 @@ async def test_fetch_detail_extracts_newbuilding_link(monkeypatch):
     assert result is not None
     assert result.newbuilding_data is not None
     assert result.newbuilding_data["id"] == 54016
+
+
+# ── kitchen_area_m2 extraction ────────────────────────────────────────────────
+
+
+@pytest.mark.asyncio
+async def test_fetch_detail_extracts_kitchen_area(monkeypatch):
+    """kitchenArea из offer → kitchen_area_m2 в DetailEnrichment."""
+    fake_state = {
+        "offerData": {
+            "offer": {
+                "cianId": 333333,
+                "kitchenArea": 9.5,
+            }
+        }
+    }
+
+    monkeypatch.setattr(
+        "app.services.scrapers.cian_detail.extract_state",
+        lambda html, mfe, key: fake_state if key == "defaultState" else None,
+    )
+    monkeypatch.setattr(
+        "app.services.scrapers.cian_detail.extract_all_states",
+        lambda html: {},
+    )
+
+    response = MagicMock()
+    response.status_code = 200
+    response.text = "<html></html>"
+
+    session = MagicMock()
+    session.get = AsyncMock(return_value=response)
+    session.close = AsyncMock()
+
+    result = await fetch_detail("https://ekb.cian.ru/sale/flat/333333/", session=session)
+    assert result is not None
+    assert result.kitchen_area_m2 == 9.5
+
+
+@pytest.mark.asyncio
+async def test_fetch_detail_kitchen_area_none_when_missing(monkeypatch):
+    """Если kitchenArea отсутствует в offer — kitchen_area_m2 остаётся None."""
+    fake_state = {
+        "offerData": {
+            "offer": {
+                "cianId": 444444,
+            }
+        }
+    }
+
+    monkeypatch.setattr(
+        "app.services.scrapers.cian_detail.extract_state",
+        lambda html, mfe, key: fake_state if key == "defaultState" else None,
+    )
+    monkeypatch.setattr(
+        "app.services.scrapers.cian_detail.extract_all_states",
+        lambda html: {},
+    )
+
+    response = MagicMock()
+    response.status_code = 200
+    response.text = "<html></html>"
+
+    session = MagicMock()
+    session.get = AsyncMock(return_value=response)
+    session.close = AsyncMock()
+
+    result = await fetch_detail("https://ekb.cian.ru/sale/flat/444444/", session=session)
+    assert result is not None
+    assert result.kitchen_area_m2 is None
+
+
+# ── save_detail_enrichment — kitchen_area_m2 persisted ───────────────────────
+
+
+def test_save_detail_enrichment_writes_kitchen_area():
+    """save_detail_enrichment передаёт kitchen_area_m2 в UPDATE listings."""
+    db = MagicMock()
+
+    # Мокаем fetchone для snapshot-запроса — price_rub=None → snapshot не пишется
+    db.execute.return_value.fetchone.return_value = None
+
+    enrichment = DetailEnrichment(
+        windows_view_type=None,
+        separate_wcs_count=None,
+        combined_wcs_count=None,
+        ceiling_height=None,
+        repair_type=None,
+        repair_state=None,
+        kitchen_area_m2=8.3,
+        views_total=None,
+        views_today=None,
+    )
+
+    save_detail_enrichment(db, listing_id=999, enrichment=enrichment)
+
+    # Проверяем что UPDATE listings вызван с параметром ka=8.3
+    update_call_params = db.execute.call_args_list[0][0][1]
+    assert update_call_params["ka"] == 8.3
+
+
+def test_save_detail_enrichment_kitchen_area_none_passthrough():
+    """Если kitchen_area_m2 = None — параметр ka=None, COALESCE сохраняет существующее."""
+    db = MagicMock()
+    db.execute.return_value.fetchone.return_value = None
+
+    enrichment = DetailEnrichment(kitchen_area_m2=None)
+
+    save_detail_enrichment(db, listing_id=1001, enrichment=enrichment)
+
+    update_call_params = db.execute.call_args_list[0][0][1]
+    assert update_call_params["ka"] is None