fix(tradein/oblast): city-slug в avito SERP + geo/city guard в Tier-2b матчинга

#2487 avito oblast per-city sweep был dead-on-arrival: _parse_html дропал все
карточки без /ekaterinburg/ в source_url, поэтому oblast-sweep по городу вне ЕКБ
терял 100% выдачи. Kept-slug теперь параметризуется через AvitoScraper.target_city_slug
(дефолт "ekaterinburg" — ЕКБ-поведение неизменно), прокинут scheduler →
run_avito_city_sweep → AvitoScraper. avito_serp_ekb_only НЕ отключается.

Bug #2 (oblast bare-street mis-bucket): голые адреса 'ул. Ленина 100' в Н.Тагиле
мис-баккетились в одноимённые ЕКБ-дома через Tier-2b (match по глобально-уникальному
normalized_address без geo/city guard). Добавлен coarse-guard: coords present →
ST_DWithin ≤3км до geom дома; coords absent → требуется city-token (self-
disambiguating); иначе skip → консервативно New house вместо мис-матча. _insert_alias
при коллизии normalized_address больше не перебивает fingerprint чужого дома (иначе
guard деградировал бы в Tier-2a-дыру).

Оба дефекта латентные (oblast per-city schedules отключены) — правка делает
capability безопасной к включению, без влияния на прод сегодня.

tradein-mvp/backend/app/services/matching/houses.py

@@ -17,6 +17,7 @@ from sqlalchemy.orm import Session
 
 from app.services.matching.normalize import (
     address_fingerprint,
+    has_city_token,
     has_house_number,
     house_number_token,
     normalize_address,
@@ -24,6 +25,14 @@ from app.services.matching.normalize import (
 
 logger = logging.getLogger(__name__)
 
+# Tier-2b oblast guard radius (metres). A bare street+number normalized_address carries
+# NO city token yet is globally unique in house_address_aliases, so 'улица ленина 100'
+# physically exists in ЕКБ, Н.Тагил, Каменск… When the incoming card HAS coords we accept
+# the alias only if its house geom is within this radius. Cities in обл.66 are ≥ ~9-15 km
+# apart, so 3 km cleanly separates them while absorbing the intra-city geocoder drift that
+# Tier-2b exists to bridge (same building, different provider coords).
+_TIER2B_GUARD_M = 3000
+
 
 def match_or_create_house(
     db: Session,
@@ -193,6 +202,35 @@ def match_or_create_house(
         # Gated on has_num (P1): never match a bare-street normalized_address — any
         # numberless listing would otherwise collapse into whichever house first
         # registered that street.
+        #
+        # Oblast guard (bug #2, обл.66 per-city rollout): normalized_address has NO city
+        # token, so a bare street+number is globally unique in the alias table yet exists
+        # physically in several cities. Accept the match only when the incoming listing is
+        # confirmably the same place:
+        #   • coords present → aliased house geom within _TIER2B_GUARD_M metres;
+        #   • coords absent   → norm_addr carries a city token (self-disambiguating —
+        #     'екатеринбург улица ленина 5' can't collide with a Н.Тагил address);
+        #   • neither          → skip. A bare common-street with no geo signal is too
+        #     ambiguous — matching would mis-bucket an oblast card into a same-named ЕКБ
+        #     house. Conservative: fall through to a New house rather than mis-match.
+        if lat is not None and lon is not None:
+            row = (
+                db.execute(
+                    text(
+                        "SELECT a.house_id FROM house_address_aliases a "
+                        "JOIN houses h ON h.id = a.house_id "
+                        "WHERE a.normalized_address = :na "
+                        "  AND h.geom IS NOT NULL "
+                        "  AND ST_DWithin(h.geom::geography, "
+                        "                 ST_MakePoint(:lon, :lat)::geography, :thr) "
+                        "LIMIT 1"
+                    ),
+                    {"na": norm_addr, "lon": lon, "lat": lat, "thr": _TIER2B_GUARD_M},
+                )
+                .mappings()
+                .first()
+            )
+        elif has_city_token(norm_addr):
             row = (
                 db.execute(
                     text(
@@ -204,6 +242,12 @@ def match_or_create_house(
                 .mappings()
                 .first()
             )
+        else:
+            logger.info(
+                "house tier2b skip: bare common-street, no coords/city na=%r src=%s",
+                norm_addr,
+                ext_source,
+            )
     if row:
         house_id = int(row["house_id"])
         _upsert_house_source(
@@ -520,6 +564,12 @@ def _insert_alias(
     row with the latest fingerprint, which is then found by Tier 2a on the next scrape.
     house_id is not updated on conflict: the first writer wins canonical ownership.
 
+    Oblast guard (bug #2): the fingerprint/source are refreshed ONLY when the conflicting
+    row belongs to the SAME house. A DIFFERENT house colliding on a bare common-street
+    normalized_address (an oblast card that fell through Tier-2b's guard to a New INSERT)
+    must NOT rewrite the owner's fingerprint — doing so would downgrade a safe coord-bearing
+    alias to a coord-less one and let the next no-coord card mis-bucket via Tier 2a.
+
     P1: a bare-street normalized_address (no house number) is NOT registered as an
     alias — it is too ambiguous to serve as a building key. Any later numberless
     listing would otherwise hit that alias via Tier 2b and be mass-dumped into the
@@ -533,8 +583,12 @@ def _insert_alias(
             INSERT INTO house_address_aliases (house_id, normalized_address, fingerprint, source)
             VALUES (CAST(:hid AS bigint), :na, :fp, :src)
             ON CONFLICT (normalized_address) DO UPDATE SET
-                fingerprint = EXCLUDED.fingerprint,
-                source      = EXCLUDED.source
+                fingerprint = CASE
+                    WHEN house_address_aliases.house_id = EXCLUDED.house_id
+                    THEN EXCLUDED.fingerprint ELSE house_address_aliases.fingerprint END,
+                source = CASE
+                    WHEN house_address_aliases.house_id = EXCLUDED.house_id
+                    THEN EXCLUDED.source ELSE house_address_aliases.source END
         """),
         {
             "hid": house_id,

tradein-mvp/backend/app/services/matching/normalize.py

@@ -112,6 +112,40 @@ def house_number_token(normalized: str | None) -> str | None:
     return m.group(1) if m else None
 
 
+# Cities covered by the обл.66 sweep rollout (ЕКБ + oblast per-city schedules).
+# Normalized form: lowercase, hyphens collapsed to spaces (mirrors normalize_address,
+# e.g. 'каменск-уральский' -> 'каменск уральский'). Mirrors CITY_ANCHORS in
+# scraper_kit.orchestration.pipeline — extend together as the sweep adds cities.
+_CITY_TOKENS: tuple[str, ...] = (
+    "екатеринбург",
+    "нижний тагил",
+    "каменск уральский",
+    "первоуральск",
+    "верхняя пышма",
+    "серов",
+)
+# Token-bounded (not substring) so a street named after a city does NOT false-positive:
+# 'улица серова 5' has token 'серова' (trailing 'а'), never bare 'серов'.
+_CITY_TOKEN_RE = re.compile(
+    r"(?:^|\s)(?:" + "|".join(re.escape(c) for c in _CITY_TOKENS) + r")(?:\s|$)"
+)
+
+
+def has_city_token(normalized: str | None) -> bool:
+    """True if the normalized address carries a known обл.66 city token.
+
+    A city token makes the normalized_address city-scoped — two addresses in different
+    cities can then never collapse to the same key, so the alias is a safe cross-source
+    building key. Used by the Tier-2b oblast guard in match_or_create_house: a bare
+    common-street address with NO city token AND no coords is too ambiguous to match a
+    globally-unique normalized_address alias (it would mis-bucket an oblast card into a
+    same-named ЕКБ house — bug #2 oblast rollout).
+    """
+    if not normalized:
+        return False
+    return _CITY_TOKEN_RE.search(normalized) is not None
+
+
 def address_fingerprint(address: str | None, lat: float | None, lon: float | None) -> str:
     """SHA-256 fingerprint of normalized address + rounded coordinates (4 dp ≈ 11 m).
 

tradein-mvp/backend/tests/test_avito_serp_city_slug.py

@@ -0,0 +1,84 @@
+"""Avito SERP city-slug filter (#2487 oblast rollout).
+
+`_parse_html` drops padding cards ("по всей России") when `avito_serp_ekb_only`
+is on. The kept city-slug used to be hardcoded `/ekaterinburg/`, so an oblast
+per-city sweep (`_job_avito_city_sweep` with a `city` param) discarded 100% of the
+target city's cards. The slug is now parameterized via `AvitoScraper.target_city_slug`
+(default → "ekaterinburg", i.e. ЕКБ behavior unchanged when no target is set).
+
+No network / no DB — `_parse_html` runs on inline HTML with a stub config.
+"""
+
+from __future__ import annotations
+
+import os
+from types import SimpleNamespace
+
+os.environ.setdefault("DATABASE_URL", "postgresql+psycopg://test:test@localhost:5432/test")
+
+from scraper_kit.providers.avito.serp import AvitoScraper
+
+_BASE_URL = "https://www.avito.ru/ekaterinburg/kvartiry/prodam-ASgBAgICAUSSA8YQ?p=1"
+
+
+def _card(slug: str, item_id: str, price: int = 5_000_000) -> str:
+    """Minimal Avito SERP card whose per-card href carries `slug` as the city segment."""
+    href = f"/{slug}/kvartiry/2k_kvartira_50_m_5_5et_{item_id}"
+    return (
+        f'<div data-marker="item" data-item-id="{item_id}">'
+        f'<a data-marker="item-title" href="{href}">2-к. квартира, 50 м², 5/9 эт.</a>'
+        f'<meta itemprop="price" content="{price}">'
+        f"</div>"
+    )
+
+
+def _html(*cards: str) -> str:
+    return "<html><body>" + "".join(cards) + "</body></html>"
+
+
+def _ekb_only_cfg() -> SimpleNamespace:
+    # _parse_html only reads config.avito_serp_ekb_only; a stub keeps the test
+    # deterministic regardless of AVITO_SERP_EKB_ONLY env in the runner.
+    return SimpleNamespace(avito_serp_ekb_only=True)
+
+
+def test_parse_keeps_target_oblast_city_drops_off_target_padding() -> None:
+    """Sweep targeting Н.Тагил keeps its cards; ЕКБ/Москва padding is dropped."""
+    s = AvitoScraper(_ekb_only_cfg(), target_city_slug="nizhniy_tagil")  # type: ignore[arg-type]
+    html = _html(
+        _card("nizhniy_tagil", "nt1"),  # target city → KEPT
+        _card("ekaterinburg", "ekb1"),  # off-target padding → DROPPED
+        _card("moskva", "msk1"),  # off-target padding → DROPPED
+    )
+    lots = s._parse_html(html, source_url_base=_BASE_URL)
+    urls = [lot.source_url or "" for lot in lots]
+
+    assert len(lots) == 1, urls
+    assert "/nizhniy_tagil/" in urls[0]
+    assert all("/ekaterinburg/" not in u for u in urls)
+    assert all("/moskva/" not in u for u in urls)
+
+
+def test_parse_default_target_is_ekb_and_drops_oblast_padding() -> None:
+    """No target (ЕКБ sweep/full-load): kept slug defaults to 'ekaterinburg' — behavior
+    identical to the previous hardcode. ЕКБ card kept, oblast padding dropped."""
+    s = AvitoScraper(_ekb_only_cfg(), target_city_slug=None)  # type: ignore[arg-type]
+    html = _html(
+        _card("ekaterinburg", "e1"),  # ЕКБ → KEPT
+        _card("nizhniy_tagil", "nt1"),  # off-target padding → DROPPED
+    )
+    lots = s._parse_html(html, source_url_base=_BASE_URL)
+    urls = [lot.source_url or "" for lot in lots]
+
+    assert len(lots) == 1, urls
+    assert "/ekaterinburg/" in urls[0]
+    assert all("/nizhniy_tagil/" not in u for u in urls)
+
+
+def test_parse_ekb_only_disabled_keeps_all_cities() -> None:
+    """avito_serp_ekb_only=False → no city filter at all, every card is kept."""
+    cfg = SimpleNamespace(avito_serp_ekb_only=False)
+    s = AvitoScraper(cfg, target_city_slug="nizhniy_tagil")  # type: ignore[arg-type]
+    html = _html(_card("nizhniy_tagil", "nt1"), _card("ekaterinburg", "e1"))
+    lots = s._parse_html(html, source_url_base=_BASE_URL)
+    assert len(lots) == 2

tradein-mvp/backend/tests/test_matching.py

@@ -17,6 +17,7 @@ from app.services.matching.conflict_resolution import (
 )
 from app.services.matching.normalize import (
     address_fingerprint,
+    has_city_token,
     has_house_number,
     house_number_token,
     normalize_address,
@@ -168,6 +169,37 @@ def test_fingerprint_all_none():
     assert len(fp) == 32
 
 
+# ---------------------------------------------------------------------------
+# has_city_token — обл.66 city-token detection (Tier-2b oblast guard)
+# ---------------------------------------------------------------------------
+
+
+def test_has_city_token_detects_ekb():
+    assert has_city_token("екатеринбург улица ленина 5") is True
+
+
+def test_has_city_token_detects_multiword_oblast_city():
+    assert has_city_token("нижний тагил улица ленина 100") is True
+    assert has_city_token("каменск уральский улица мира 7") is True
+
+
+def test_has_city_token_bare_street_is_false():
+    # The collision-prone case: a bare street+number carries no city token.
+    assert has_city_token("улица ленина 100") is False
+    assert has_city_token("уральская улица 62к1") is False
+
+
+def test_has_city_token_no_false_positive_on_street_named_after_city():
+    # 'улица серова' must NOT match the city token 'серов' (word-bounded, not substring).
+    assert has_city_token("улица серова 5") is False
+    assert has_city_token("первоуральская улица 3") is False
+
+
+def test_has_city_token_handles_empty():
+    assert has_city_token("") is False
+    assert has_city_token(None) is False
+
+
 # ---------------------------------------------------------------------------
 # match_or_create_house — mock DB tier routing
 # ---------------------------------------------------------------------------
@@ -622,6 +654,125 @@ def test_insert_alias_executes_when_house_number_present():
     db.execute.assert_called_once()
 
 
+def test_insert_alias_conflict_only_rebinds_same_house():
+    """Oblast guard (#2): ON CONFLICT refreshes fingerprint/source ONLY for the same
+    house. A different house colliding on a bare common-street normalized_address must
+    not rewrite the owner's fingerprint (that would downgrade a coord-bearing alias to a
+    coord-less one and let the next no-coord card mis-bucket via Tier 2a)."""
+    from app.services.matching.houses import _insert_alias
+
+    db = MagicMock()
+    _insert_alias(db, house_id=1, address="улица Ленина 100", fp="c" * 32, source="avito")
+    sql = " ".join(str(db.execute.call_args.args[0]).split())
+    assert "ON CONFLICT (normalized_address) DO UPDATE" in sql
+    # fingerprint/source updated only when the existing owner == the incoming house.
+    assert "house_address_aliases.house_id = EXCLUDED.house_id" in sql
+
+
+# ---------------------------------------------------------------------------
+# match_or_create_house — Tier-2b oblast geo/city guard (bug #2)
+# ---------------------------------------------------------------------------
+
+
+def test_tier2b_coord_present_uses_geo_guard_and_matches_within_radius():
+    """Coords present → Tier-2b runs the ST_DWithin JOIN guard; a house within the
+    radius is accepted as a fingerprint match (0.9)."""
+    from app.services.matching.houses import match_or_create_house
+
+    db = _make_db(
+        [
+            None,  # pg_advisory_xact_lock
+            None,  # house_sources miss (Tier 1)
+            None,  # fingerprint miss (Tier 2a)
+            {"house_id": 77},  # Tier 2b JOIN+ST_DWithin hit (same place, within radius)
+            None,  # _upsert_house_source
+            None,  # _insert_alias
+        ]
+    )
+    house_id, conf, method = match_or_create_house(
+        db, "avito", "ext-2b-geo", address="улица Ленина 100", lat=57.910, lon=59.980
+    )
+    assert (house_id, conf, method) == (77, 0.9, "fingerprint")
+    # The Tier-2b lookup must be the geo-guarded JOIN, not a bare normalized_address SELECT.
+    tier2b_sql = _executed_sqls(db)[3]
+    assert "ST_DWithin" in tier2b_sql
+    assert "JOIN houses" in tier2b_sql
+
+
+def test_tier2b_coord_present_cross_city_falls_through_to_new():
+    """A bare street+number oblast card WITH coords whose only same-street alias is a
+    far-away (cross-city) house: the ST_DWithin guard filters it out (JOIN miss) → the
+    card falls through to a New house instead of mis-bucketing into the ЕКБ house."""
+    from app.services.matching.houses import match_or_create_house
+
+    db = _make_db(
+        [
+            None,  # pg_advisory_xact_lock
+            None,  # house_sources miss
+            None,  # fingerprint miss (Tier 2a)
+            None,  # Tier 2b JOIN+ST_DWithin miss (candidate house is >3km away)
+            None,  # geo miss (Tier 3 — coords present)
+            {"id": 909},  # INSERT RETURNING id (New house)
+            None,  # _upsert_house_source
+            None,  # _insert_alias
+        ]
+    )
+    house_id, conf, method = match_or_create_house(
+        db, "avito", "ext-2b-xcity", address="улица Ленина 100", lat=57.910, lon=59.980
+    )
+    assert (house_id, conf, method) == (909, 1.0, "new")
+
+
+def test_tier2b_no_coords_no_city_token_skips_and_creates_new():
+    """No coords AND a bare common-street (no city token) → Tier-2b is SKIPPED entirely
+    (no normalized_address lookup). The card falls through to a New house — conservative:
+    do not mis-bucket a bare 'улица ленина 100' into a same-named ЕКБ alias."""
+    from app.services.matching.houses import match_or_create_house
+
+    db = _make_db(
+        [
+            None,  # pg_advisory_xact_lock
+            None,  # house_sources miss
+            None,  # fingerprint miss (Tier 2a); Tier 2b SKIPPED (no coords, no city token)
+            {"id": 910},  # INSERT RETURNING id (New house) — no Tier 3 (no coords)
+            None,  # _upsert_house_source
+            None,  # _insert_alias
+        ]
+    )
+    house_id, conf, method = match_or_create_house(
+        db, "avito", "ext-2b-bare", address="улица Ленина 100"
+    )
+    assert (house_id, conf, method) == (910, 1.0, "new")
+    assert not any(
+        "normalized_address = :na" in s for s in _executed_sqls(db)
+    ), "bare common-street with no coords/city must not run a Tier-2b lookup"
+
+
+def test_tier2b_no_coords_with_city_token_matches():
+    """No coords but the normalized_address carries a city token → self-disambiguating,
+    so Tier-2b matches on normalized_address alone (0.9). ЕКБ cross-source dedup for
+    city-qualified addresses is preserved."""
+    from app.services.matching.houses import match_or_create_house
+
+    db = _make_db(
+        [
+            None,  # pg_advisory_xact_lock
+            None,  # house_sources miss
+            None,  # fingerprint miss (Tier 2a)
+            {"house_id": 33},  # Tier 2b normalized_address hit (city token present)
+            None,  # _upsert_house_source
+            None,  # _insert_alias
+        ]
+    )
+    house_id, conf, method = match_or_create_house(
+        db, "avito", "ext-2b-city", address="Екатеринбург, улица Ленина, 100"
+    )
+    assert (house_id, conf, method) == (33, 0.9, "fingerprint")
+    tier2b_sql = _executed_sqls(db)[3]
+    assert "normalized_address = :na" in tier2b_sql
+    assert "ST_DWithin" not in tier2b_sql
+
+
 # ---------------------------------------------------------------------------
 # match_or_create_listing — mock DB tier routing
 # ---------------------------------------------------------------------------

tradein-mvp/packages/scraper-kit/src/scraper_kit/orchestration/pipeline.py

@@ -829,6 +829,7 @@ async def run_avito_city_sweep(
     shutdown_requested: Callable[[], bool] = lambda: False,
     proxy_provider: ProxyProvider | None = None,
     anchors: list[tuple[float, float, str]] | None = None,
+    city_slug: str | None = None,
     radius_m: int = 1500,
     pages_per_anchor: int = 3,
     enrich_houses: bool = True,
@@ -853,6 +854,9 @@ async def run_avito_city_sweep(
     вместо прямых импортов app.* (см. scraper_kit.contracts). process_houses_imv_batch
     зовётся через enrichment (EnrichmentJobs Protocol).
     """
+    # city_slug (#2487): слаг города-цели (напр. "nizhniy_tagil") прокидывается в
+    # AvitoScraper.target_city_slug → SERP-фильтр оставляет карточки этого города.
+    # None → ЕКБ-дефолт (совпадает с anchors=EKB_ANCHORS fallback ниже).
     _anchors = anchors if anchors is not None else EKB_ANCHORS
     counters = CitySweepCounters(anchors_total=len(_anchors))
     all_touched_house_ids: set[int] = set()
@@ -959,7 +963,9 @@ async def run_avito_city_sweep(
                     nonlocal all_touched_house_ids, sweep_rotations_done
 
                     # ── Phase 1+2: SERP + save ─────────────────────────────────
-                    scraper = AvitoScraper(config)
+                    # #2487: target_city_slug → _parse_html оставляет карточки
+                    # города-цели (oblast slug), а не хардкод /ekaterinburg/. None → ЕКБ.
+                    scraper = AvitoScraper(config, target_city_slug=city_slug)
                     if browser_mode:
                         scraper._browser = shared_bf
                         # Shared-browser режим: _cffi=None → curl_cffi-fallback на

tradein-mvp/packages/scraper-kit/src/scraper_kit/orchestration/scheduler.py

@@ -455,6 +455,9 @@ async def _job_avito_city_sweep(
         shutdown_requested=ctx.shutdown_requested,
         proxy_provider=ctx.proxy_provider,
         anchors=anchors,
+        # #2487: слаг города-цели → SERP-фильтр _parse_html оставляет карточки
+        # этого города (иначе oblast-sweep дропал 100% из-за хардкода /ekaterinburg/).
+        city_slug=city,
         pages_per_anchor=int(params.get("pages_per_anchor", 3)),
         detail_top_n=int(params.get("detail_top_n", 20)),
         request_delay_sec=float(params.get("request_delay_sec", 7.0)),

tradein-mvp/packages/scraper-kit/src/scraper_kit/providers/avito/serp.py

@@ -350,6 +350,7 @@ class AvitoScraper(BaseScraper):
         config: ScraperConfig,
         *,
         delay_provider: Callable[[str], float] | None = None,
+        target_city_slug: str | None = None,
     ) -> None:
         super().__init__()
         # Strangler-инжекция (#2133): конфиг и провайдер задержки приходят снаружи
@@ -363,6 +364,10 @@ class AvitoScraper(BaseScraper):
         self._browser: BrowserFetcher | None = None
         # #823: счётчик карточек, которые не удалось распарсить из-за неожиданной структуры DOM.
         self.parse_failures: int = 0
+        # #2487 oblast rollout: slug города-цели sweep'а (напр. "nizhniy_tagil").
+        # None → ЕКБ (дефолт). Используется _parse_html-фильтром avito_serp_ekb_only,
+        # чтобы оставлять карточки TARGET-города, а не хардкодить /ekaterinburg/.
+        self._target_city_slug = target_city_slug
 
     async def __aenter__(self) -> AvitoScraper:
         # Проактивная ротация IP в начале sweep (#1731): apw-IP «протухает» по
@@ -1714,8 +1719,11 @@ class AvitoScraper(BaseScraper):
         лениво только у верхних карточек (#726); DOM-marker остаётся fallback.
 
         Если self._config.avito_serp_ekb_only=True (дефолт), отбрасываем карточки,
-        чей per-card source_url не содержит /ekaterinburg/ — Avito добивает выдачу
-        «по всей России» при малом числе ЕКБ-результатов (4+ комн., дорогие сегменты).
+        чей per-card source_url не содержит слаг ГОРОДА-ЦЕЛИ sweep'а — Avito добивает
+        выдачу «по всей России» при малом числе результатов (4+ комн., дорогие сегменты).
+        Город-цель = self._target_city_slug (напр. "nizhniy_tagil"), по умолчанию
+        "ekaterinburg". Без параметризации (#2487) oblast-sweep по городу вне ЕКБ терял
+        100% карточек: их per-card slug (/nizhniy_tagil/) не содержит /ekaterinburg/.
         Карточки с нераспознанным city-slug (href без ведущего /city/) пропускаются
         консервативно (не дропаются по ошибке).
         """
@@ -1724,6 +1732,10 @@ class AvitoScraper(BaseScraper):
         cards = tree.css('[data-marker="item"]')
         lots: list[ScrapedLot] = []
         ekb_only = self._config.avito_serp_ekb_only
+        # #2487: слаг города, карточки которого оставляем. Дефолт "ekaterinburg" —
+        # ЕКБ-поведение неизменно, когда target не задан (обычный ЕКБ-sweep/full-load).
+        kept_slug = self._target_city_slug or "ekaterinburg"
+        kept_seg = f"/{kept_slug}/"
         dropped = 0
         no_city = 0
         for card in cards:
@@ -1736,11 +1748,11 @@ class AvitoScraper(BaseScraper):
                 # urljoin всегда возвращает абсолютный URL (https://www.avito.ru/...).
                 # Avito city-slug — первый path-сегмент после netloc.
                 # Пример: https://www.avito.ru/ekaterinburg/... → /ekaterinburg/ присутствует.
-                #         https://www.avito.ru/moskva/...        → нет /ekaterinburg/.
+                #         https://www.avito.ru/moskva/...        → нет слага города-цели.
                 # Для href без явного city (/kvartiry/... — теоретически не должно быть,
                 # но консервативно пропускаем).
-                if "/ekaterinburg/" in card_url:
-                    # ЕКБ-карточка — берём
+                if kept_seg in card_url:
+                    # Карточка города-цели — берём
                     pass
                 else:
                     # Проверяем, есть ли вообще city-slug (хотя бы один path-сегмент
@@ -1758,13 +1770,15 @@ class AvitoScraper(BaseScraper):
                         # Нет city-slug → консервативно берём карточку
                         lots.append(lot)
                         continue
-                    # Есть city-slug, но не /ekaterinburg/ → padding по России → дропаем
+                    # Есть city-slug, но не города-цели → padding по России → дропаем
                     dropped += 1
                     continue
             lots.append(lot)
         if ekb_only and (dropped or no_city):
             logger.info(
-                "avito SERP: dropped %d non-EKB cards (padding), %d cards without city-slug kept",
+                "avito SERP (kept=%s): dropped %d off-target cards (padding), "
+                "%d cards without city-slug kept",
+                kept_slug,
                 dropped,
                 no_city,
             )