refactor(server): split oversized backend services

server/tests/test_user_agent_service.py

@@ -16,6 +16,7 @@ from app.schemas.user_agent import UserAgentCitation, UserAgentRequest, UserAgen
 from app.services.agent_assets import AgentAssetService
 from app.services.ontology import SemanticOntologyService
 from app.services.user_agent import UserAgentService
+from app.services.user_agent_documents import UserAgentDocumentService
 
 
 def build_session_factory() -> sessionmaker[Session]:
@@ -1096,6 +1097,42 @@ def test_user_agent_returns_submitted_draft_payload_for_review_next_step() -> No
         assert "当前节点为 直属领导审批" in response.answer
 
 
+def test_user_agent_document_service_normalizes_ocr_fields_and_scene() -> None:
+    document_service = UserAgentDocumentService()
+
+    fields = document_service.extract_document_fields(
+        {
+            "filename": "北京南站火车票.png",
+            "document_type": "train_ticket",
+            "scene_code": "travel",
+            "summary": "电子发票 2026-03-04 广州南至北京南 二等座 票价 ￥560.00 中国铁路",
+            "text": "电子发票 2026-03-04 广州南至北京南 二等座 票价 ￥560.00 中国铁路",
+            "document_fields": [
+                {"key": "amount", "label": "票价", "value": "￥560.00"},
+                {"key": "date", "label": "业务发生时间", "value": "2026-03-04"},
+                {"key": "merchant_name", "label": "商户", "value": "中国铁路"},
+            ],
+        }
+    )
+    classified = document_service.classify_document(
+        {"filename": "客户餐饮发票.jpg", "summary": "餐饮发票 客户招待 金额 320 元"},
+        expense_type_code="entertainment",
+        has_customer=True,
+    )
+
+    assert fields["金额"] == "560.00元"
+    assert fields["列车出发时间"] == "2026-03-04"
+    assert "商户/酒店" not in fields
+    assert document_service.extract_amount_text_from_value("滴滴出行 支付金额 1 元，实付 13.4 元，订单号 12345678") == "13.40元"
+    assert classified["document_type"] == "meal_receipt"
+    assert classified["expense_type"] == "entertainment"
+    assert document_service.infer_expense_type_from_documents(
+        [{"filename": "客户餐饮发票.jpg", "summary": "餐饮发票 客户招待 金额 320 元"}],
+        expense_type_code="entertainment",
+        has_customer=True,
+    ) == "业务招待费"
+
+
 def test_user_agent_builds_review_payload_for_multi_document_expense_flow() -> None:
     session_factory = build_session_factory()
     with session_factory() as db: