feat: 新增员工行为画像算法与费用风险标签体系

后端新增员工行为画像算法模块，支持标签规则引擎和评分计算，
完善员工模型、银行信息、序列化和导入逻辑，优化报销审批流
和工作流常量，增强 Hermes 同步和知识同步能力，前端新增费
用画像详情弹窗、雷达图和风险卡片组件，完善登录页和工作台
样式，优化文档中心和归档中心交互，补充单元测试。

server/src/app/services/employee_bank_info.py

@@ -0,0 +1,26 @@
+from __future__ import annotations
+
+import hashlib
+
+from app.models.employee import Employee
+
+DEFAULT_EMPLOYEE_BANK_NAME = "招商银行深圳科技园支行"
+
+
+def build_default_bank_account_no(employee_no: str | None) -> str | None:
+    text = str(employee_no or "").strip()
+    if not text:
+        return None
+
+    digest = hashlib.sha256(text.encode("utf-8")).hexdigest()
+    numeric = str(int(digest[:18], 16)).zfill(13)[-13:]
+    return f"622588{numeric}"
+
+
+def apply_default_bank_info(employee: Employee) -> None:
+    if not employee.bank_account_name and employee.name:
+        employee.bank_account_name = employee.name
+    if not employee.bank_name:
+        employee.bank_name = DEFAULT_EMPLOYEE_BANK_NAME
+    if not employee.bank_account_no:
+        employee.bank_account_no = build_default_bank_account_no(employee.employee_no)