test(backend): update service tests

- test_ontology_service.py: update ontology service tests
- test_orchestrator_service.py: update orchestrator service tests
- test_user_agent_service.py: update user agent service tests

server/tests/test_ontology_service.py

@@ -295,6 +295,44 @@ def test_semantic_ontology_service_prefers_expense_for_customer_entertainment_na
         )
 
 
+def test_semantic_ontology_service_uses_client_local_date_for_relative_time() -> None:
+    session_factory = build_session_factory()
+    with session_factory() as db:
+        result = SemanticOntologyService(db).parse(
+            OntologyParseRequest(
+                query="我昨天请客户吃饭花了200元",
+                user_id="pytest",
+                context_json={
+                    "client_now_iso": "2026-05-12T16:30:00.000Z",
+                    "client_timezone_offset_minutes": -480,
+                },
+            )
+        )
+
+        assert result.time_range.raw == "昨天"
+        assert result.time_range.start_date == "2026-05-12"
+        assert result.time_range.end_date == "2026-05-12"
+
+
+def test_semantic_ontology_service_extracts_day_before_yesterday_from_client_local_date() -> None:
+    session_factory = build_session_factory()
+    with session_factory() as db:
+        result = SemanticOntologyService(db).parse(
+            OntologyParseRequest(
+                query="我前天请客户吃饭花了200元",
+                user_id="pytest",
+                context_json={
+                    "client_now_iso": "2026-05-12T16:30:00.000Z",
+                    "client_timezone_offset_minutes": -480,
+                },
+            )
+        )
+
+        assert result.time_range.raw == "前天"
+        assert result.time_range.start_date == "2026-05-11"
+        assert result.time_range.end_date == "2026-05-11"
+
+
 def test_semantic_ontology_service_uses_model_parse_when_available(monkeypatch) -> None:
     session_factory = build_session_factory()
     with session_factory() as db: