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_reimbursement_endpoints.py

@@ -364,6 +364,70 @@ def test_approve_claim_endpoint_routes_direct_manager_claim_to_finance_review()
     assert "manager-approve-api@example.com" not in approval_events[0]["message"]
 
 
+def test_approve_application_endpoint_completes_after_direct_manager_review() -> None:
+    client, session_factory = build_client()
+    with session_factory() as db:
+        manager = Employee(
+            id="mgr-application-approve-1",
+            employee_no="E21002",
+            name="李经理",
+            email="manager-application-approve-api@example.com",
+        )
+        employee = Employee(
+            id="emp-application-approve-1",
+            employee_no="E11002",
+            name="张三",
+            email="zhangsan-application-approve-api@example.com",
+            manager=manager,
+        )
+        claim = ExpenseClaim(
+            id="claim-application-approve-1",
+            claim_no="APP-20260525-API001",
+            employee_id=employee.id,
+            employee_name="张三",
+            department_id="dept-1",
+            department_name="交付部",
+            project_code=None,
+            expense_type="travel_application",
+            reason="支撑国网服务器上线部署",
+            location="上海",
+            amount=Decimal("12000.00"),
+            currency="CNY",
+            invoice_count=0,
+            occurred_at=datetime(2026, 5, 25, tzinfo=UTC),
+            submitted_at=datetime(2026, 5, 25, 10, 0, tzinfo=UTC),
+            status="submitted",
+            approval_stage="直属领导审批",
+            risk_flags_json=[],
+        )
+        db.add_all([manager, employee, claim])
+        db.commit()
+
+    response = client.post(
+        "/api/v1/reimbursements/claims/claim-application-approve-1/approve",
+        json={"opinion": "业务必要，同意申请。"},
+        headers={
+            "X-Auth-Username": "manager-application-approve-api@example.com",
+            "X-Auth-Name": "manager-application-approve-api@example.com",
+            "X-Auth-Role-Codes": "manager",
+        },
+    )
+
+    assert response.status_code == 200
+    payload = response.json()
+    assert payload["status"] == "approved"
+    assert payload["approval_stage"] == "审批完成"
+    assert any(
+        item["source"] == "manual_approval"
+        and item["event_type"] == "expense_application_approval"
+        and item["opinion"] == "业务必要，同意申请。"
+        and item["operator"] == "李经理"
+        and item["next_status"] == "approved"
+        and item["next_approval_stage"] == "审批完成"
+        for item in payload["risk_flags_json"]
+    )
+
+
 def test_claim_item_pdf_attachment_preview_returns_generated_image(monkeypatch, tmp_path) -> None:
     preview_bytes = b"fake-preview-png"
     preview_data_url = f"data:image/png;base64,{base64.b64encode(preview_bytes).decode('ascii')}"