feat: 增强员工管理与报销单全流程功能

- 新增员工Excel导入服务(employee_spreadsheet)及导入/导出API端点
- 员工服务增加批量创建、邮箱唯一校验、组织架构关联等能力
- 报销单提交补充身份回填、部门信息透传及预审结果展示优化
- 认证流程增加部门信息(departmentName)并在schema中同步扩展
- 用户Agent服务增加部门关联与报销单回填逻辑
- 前端员工管理页面全面重构，新增导入导出、搜索过滤、分页等功能
- 前端审批中心、审计、差旅报销等视图交互与样式优化
- 新增TableLoadingState共享组件及员工导入测试用例

server/tests/test_employee_spreadsheet_import.py

@@ -0,0 +1,153 @@
+from __future__ import annotations
+
+from io import BytesIO
+
+from openpyxl import Workbook
+from sqlalchemy import create_engine, select
+from sqlalchemy.orm import Session, sessionmaker
+from sqlalchemy.pool import StaticPool
+
+from app.db.base import Base
+from app.models.employee import Employee
+from app.services.employee import EmployeeService
+from app.services.employee_spreadsheet import EMPLOYEE_HEADERS, EMPLOYEE_SHEET_NAME
+
+
+def build_session() -> Session:
+    engine = create_engine(
+        "sqlite+pysqlite:///:memory:",
+        connect_args={"check_same_thread": False},
+        poolclass=StaticPool,
+    )
+    Base.metadata.create_all(bind=engine)
+    session_factory = sessionmaker(bind=engine, autoflush=False, autocommit=False)
+    return session_factory()
+
+
+def build_workbook_bytes(rows: list[list[object]]) -> bytes:
+    workbook = Workbook()
+    sheet = workbook.active
+    sheet.title = EMPLOYEE_SHEET_NAME
+    sheet.append(list(EMPLOYEE_HEADERS))
+    for row in rows:
+        sheet.append(row)
+
+    buffer = BytesIO()
+    workbook.save(buffer)
+    return buffer.getvalue()
+
+
+def test_import_employees_rejects_invalid_row_without_writing() -> None:
+    with build_session() as db:
+        service = EmployeeService(db)
+        first = service.list_employees()[0]
+
+        content = build_workbook_bytes(
+            [
+                [
+                    first.employeeNo,
+                    "",
+                    first.email,
+                    "",
+                    "",
+                    "",
+                    "",
+                    "",
+                    first.position,
+                    first.grade,
+                    "",
+                    "",
+                    "",
+                    "",
+                    "在职",
+                    "user",
+                ]
+            ]
+        )
+
+        result = service.import_employees(content)
+
+        assert result.success is False
+        assert result.summary.errorCount >= 1
+        assert any("姓名" in item.message for item in result.errors)
+        refreshed = service.get_employee(first.id)
+        assert refreshed is not None
+        assert refreshed.name == first.name
+
+
+def test_import_employees_updates_existing_employee() -> None:
+    with build_session() as db:
+        service = EmployeeService(db)
+        employee = service.list_employees()[0]
+        new_name = f"{employee.name}-导入"
+
+        content = build_workbook_bytes(
+            [
+                [
+                    employee.employeeNo,
+                    new_name,
+                    employee.email,
+                    "男",
+                    "",
+                    "13900000001",
+                    "",
+                    "上海",
+                    employee.position,
+                    employee.grade,
+                    "FIN-SSC",
+                    "",
+                    "华东财务组",
+                    "CC-TEST",
+                    "在职",
+                    "user",
+                ]
+            ]
+        )
+
+        result = service.import_employees(content, actor="测试管理员")
+
+        assert result.success is True
+        assert result.summary.updated == 1
+        updated = service.get_employee(employee.id)
+        assert updated is not None
+        assert updated.name == new_name
+        assert updated.phone == "13900000001"
+
+
+def test_import_employees_creates_new_employee() -> None:
+    with build_session() as db:
+        service = EmployeeService(db)
+        service.list_employees()
+
+        content = build_workbook_bytes(
+            [
+                [
+                    "E90001",
+                    "导入新员工",
+                    "import.new.user@xfinance.com",
+                    "女",
+                    "",
+                    "13811112222",
+                    "2025-01-01",
+                    "上海",
+                    "业务专员",
+                    "P3",
+                    "FIN-SSC",
+                    "E10234",
+                    "华东财务组",
+                    "CC-9001",
+                    "在职",
+                    "user",
+                ]
+            ]
+        )
+
+        result = service.import_employees(content)
+
+        assert result.success is True
+        assert result.summary.created == 1
+        imported = db.execute(
+            select(Employee).where(Employee.employee_no == "E90001")
+        ).scalar_one()
+        assert imported.name == "导入新员工"
+        assert imported.email == "import.new.user@xfinance.com"