Preserve confirmed vehicle details

tests/test_db.py

@@ -40,6 +40,9 @@ class TestPersistenceServiceIntegration(unittest.TestCase):
             origin_url=f"https://www.MOBILEDE.com/VehicleDetail/{origin_id}~US",
             origin_id=origin_id,
             slug=f"toyota-camry-{origin_id}",
+            details_confirmed=True,
+            images_confirmed=True,
+            preserve_existing_details=False,
             images=[
                 ImageRecord(
                     fullres_image="https://vis.MOBILEDE.com/resizer?imageKeys=1&width=845&height=633",
@@ -131,6 +134,89 @@ class TestPersistenceServiceIntegration(unittest.TestCase):
         self.assertEqual(result["images_upserted"], 1)
         self.assertEqual(len(images), 1)
 
+    def test_search_update_preserves_confirmed_details_and_gallery(self) -> None:
+        detail = self._record("mobile.de:confirmed", price=1000)
+        detail.drive = "4WD"
+        detail.gearbox = "AT"
+        detail.body_type = "SUV"
+        detail.engine_volume = 1998
+        detail.color = "black"
+        detail.mileage = 45000
+        detail.images = [
+            ImageRecord(
+                fullres_image=f"https://example.test/detail-{index}.jpg",
+                preview_image=f"https://example.test/detail-{index}-preview.jpg",
+                order_index=index,
+            )
+            for index in range(3)
+        ]
+        self.persistence.upsert_car(detail)
+
+        search = self._record("mobile.de:confirmed", price=1200)
+        search.details_confirmed = False
+        search.images_confirmed = False
+        search.preserve_existing_details = True
+        search.drive = None
+        search.gearbox = None
+        search.body_type = "OTHER"
+        search.engine_volume = None
+        search.color = "other"
+        search.mileage = 0
+        search.images = [
+            ImageRecord(
+                fullres_image="https://example.test/search.jpg",
+                preview_image="https://example.test/search-preview.jpg",
+                order_index=0,
+            )
+        ]
+        self.persistence.upsert_car(search)
+
+        with self.persistence.session_scope() as session:
+            car = session.execute(select(Car).where(Car.origin_id == detail.origin_id)).scalar_one()
+            images = session.execute(
+                select(Image).where(Image.car_id == car.id).order_by(Image.order_index)
+            ).scalars().all()
+
+        self.assertEqual(car.price, 1200)
+        self.assertEqual(car.drive, "4WD")
+        self.assertEqual(car.gearbox, "AT")
+        self.assertEqual(car.body_type, "SUV")
+        self.assertEqual(car.engine_volume, 1998)
+        self.assertEqual(car.color, "black")
+        self.assertEqual(car.mileage, 45000)
+        self.assertEqual([image.fullres_image for image in images], [
+            "https://example.test/detail-0.jpg",
+            "https://example.test/detail-1.jpg",
+            "https://example.test/detail-2.jpg",
+        ])
+
+    def test_confirmed_detail_update_replaces_values_and_gallery(self) -> None:
+        first = self._record("mobile.de:detail-refresh")
+        first.drive = "FWD"
+        first.body_type = "SEDAN"
+        self.persistence.upsert_car(first)
+
+        refreshed = self._record("mobile.de:detail-refresh", price=2000)
+        refreshed.drive = "RWD"
+        refreshed.body_type = "COUPE"
+        refreshed.images = [
+            ImageRecord(
+                fullres_image="https://example.test/refreshed.jpg",
+                preview_image="https://example.test/refreshed-preview.jpg",
+                order_index=0,
+            )
+        ]
+        self.persistence.upsert_car(refreshed)
+
+        with self.persistence.session_scope() as session:
+            car = session.execute(select(Car).where(Car.origin_id == first.origin_id)).scalar_one()
+            images = session.execute(select(Image).where(Image.car_id == car.id)).scalars().all()
+
+        self.assertEqual(car.price, 2000)
+        self.assertEqual(car.drive, "RWD")
+        self.assertEqual(car.body_type, "COUPE")
+        self.assertEqual([image.fullres_image for image in images], ["https://example.test/refreshed.jpg"])
+
     def test_start_sync_run_marks_stale_running_runs_as_failed(self) -> None:
         first_run_id = self.persistence.start_sync_run("lane-a")
         second_run_id = self.persistence.start_sync_run("lane-b")