feat: 完善报销单审批流程及退回原因追踪

新增直属领导审批通过接口和审批待办列表查询，报销单退回
支持原因码分类和审批环节标记，优化票据附件去重和路径
回退查找，前端新增退回原因对话框、审批收件箱和工作台
图标组件，补充工具函数和单元测试覆盖。

server/tests/test_ontology_service.py

@@ -433,11 +433,11 @@ def test_semantic_ontology_service_extracts_day_before_yesterday_from_client_loc
         assert result.time_range.end_date == "2026-05-11"
 
 
-def test_semantic_ontology_service_maps_office_supplies_to_office_expense_type() -> None:
-    session_factory = build_session_factory()
-    with session_factory() as db:
-        result = SemanticOntologyService(db).parse(
-            OntologyParseRequest(
+def test_semantic_ontology_service_maps_office_supplies_to_office_expense_type() -> None:
+    session_factory = build_session_factory()
+    with session_factory() as db:
+        result = SemanticOntologyService(db).parse(
+            OntologyParseRequest(
                 query="我买了办公用品和文具，花了88元，帮我报销",
                 user_id="pytest",
             )
@@ -446,15 +446,33 @@ def test_semantic_ontology_service_maps_office_supplies_to_office_expense_type()
         assert result.scenario == "expense"
         assert result.intent == "draft"
         assert any(
-            item.type == "expense_type" and item.normalized_value == "office"
-            for item in result.entities
-        )
-
-
-def test_semantic_ontology_service_uses_model_parse_when_available(monkeypatch) -> None:
-    session_factory = build_session_factory()
-    with session_factory() as db:
-        service = SemanticOntologyService(db)
+            item.type == "expense_type" and item.normalized_value == "office"
+            for item in result.entities
+        )
+
+
+def test_semantic_ontology_service_maps_riding_fare_to_transport_expense_type() -> None:
+    session_factory = build_session_factory()
+    with session_factory() as db:
+        result = SemanticOntologyService(db).parse(
+            OntologyParseRequest(
+                query="业务发生时间:2026-03-04，送客户去林萃小区办事，请报销乘车费用",
+                user_id="pytest",
+            )
+        )
+
+        assert result.scenario == "expense"
+        assert result.intent == "draft"
+        assert any(
+            item.type == "expense_type" and item.normalized_value == "transport"
+            for item in result.entities
+        )
+
+
+def test_semantic_ontology_service_uses_model_parse_when_available(monkeypatch) -> None:
+    session_factory = build_session_factory()
+    with session_factory() as db:
+        service = SemanticOntologyService(db)
         monkeypatch.setattr(
             service,
             "_parse_with_model",