fix(client): fail closed on polling configuration drift

client/tests/polling/test_coordinator.py

@@ -121,9 +121,11 @@ class FakeGateway:
 class FakeConsumer:
     def __init__(self) -> None:
         self.claims: list[ClaimedTask] = []
+        self.profiles: list[ProfileSettings] = []
 
-    def accept_claim(self, claimed: ClaimedTask) -> None:
+    def accept_claim(self, claimed: ClaimedTask, profile: ProfileSettings) -> None:
         self.claims.append(claimed)
+        self.profiles.append(profile)
 
 
 def wait_until(predicate, timeout_ms: int = 2000) -> None:
@@ -339,6 +341,28 @@ class PollingCoordinatorTests(unittest.TestCase):
         coordinator.stop()
         wait_until(lambda: not coordinator.operation_in_flight)
 
+    def test_consumer_receives_start_snapshot_even_if_profile_changes_while_claiming(self) -> None:
+        gate = threading.Event()
+        store = FakeStore(snapshot())
+        gateway = FakeGateway([claimed_task()], gate)
+        consumer = FakeConsumer()
+        original = profile(http_timeout=10)
+        coordinator, frozen = self.make_coordinator(
+            store,
+            gateway,
+            consumer,
+            settings=original,
+        )
+        coordinator.start()
+        wait_until(lambda: coordinator.state == PollingState.CLAIMING and gateway.calls == 1)
+        changed = profile(http_timeout=27)
+        coordinator.update_profile_settings(changed)
+        gate.set()
+        wait_until(lambda: coordinator.state == PollingState.ACTIVE)
+        self.assertEqual(frozen, [original])
+        self.assertEqual(consumer.profiles, [original])
+        self.assertIsNot(consumer.profiles[0], changed)
+
     def test_claim_view_redacts_sentinel_even_if_title_contains_it(self) -> None:
         wire = claim_wire()
         wire["task"]["title"] = "标题 " + SENTINEL_TOKEN