feat: 完善文档中心与报销申请交互及侧边栏重构

后端优化编排器报销查询和本体检测精度，增强报销单草稿保
存和附件回填逻辑，前端重构侧边栏组件支持折叠和图标导
航，完善文档中心状态筛选和详情提示，报销创建和审批详情
页优化会话管理和费用明细交互，新增助手应用服务和预设动
作工具函数，补充单元测试覆盖。

server/tests/test_ontology_service.py

@@ -649,6 +649,40 @@ def test_semantic_ontology_service_requires_attachment_for_meeting_application()
         assert "attachments" in result.missing_slots
 
 
+def test_semantic_ontology_service_treats_application_session_as_application_context() -> None:
+    session_factory = build_session_factory()
+    with session_factory() as db:
+        result = SemanticOntologyService(db).parse(
+            OntologyParseRequest(
+                query=(
+                    "发生时间：2026-05-25\n"
+                    "地点：上海\n"
+                    "事由：支持上海国网服务器部署\n"
+                    "天数：3天"
+                ),
+                user_id="pytest",
+                context_json={
+                    "session_type": "application",
+                    "entry_source": "application",
+                    "attachment_count": 0,
+                },
+            )
+        )
+
+        assert result.scenario == "expense"
+        assert result.intent == "draft"
+        assert any(
+            item.type == "document_type" and item.normalized_value == "expense_application"
+            for item in result.entities
+        )
+        assert any(
+            item.type == "workflow_stage" and item.normalized_value == "pre_approval"
+            for item in result.entities
+        )
+        assert "expense_type" in result.missing_slots
+        assert "amount" in result.missing_slots
+
+
 def test_semantic_ontology_service_uses_model_parse_when_available(monkeypatch) -> None:
     session_factory = build_session_factory()
     with session_factory() as db: