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_schema.py

@@ -0,0 +1,25 @@
+from __future__ import annotations
+
+from sqlalchemy import inspect, text
+from sqlalchemy.orm import Session
+
+EMPLOYEE_SCHEMA_COLUMNS: dict[str, str] = {
+    "password_hash": "ALTER TABLE employees ADD COLUMN password_hash VARCHAR(255)",
+    "compliance_score": "ALTER TABLE employees ADD COLUMN compliance_score INTEGER DEFAULT 100 NOT NULL",
+    "bank_name": "ALTER TABLE employees ADD COLUMN bank_name VARCHAR(120)",
+    "bank_account_no": "ALTER TABLE employees ADD COLUMN bank_account_no VARCHAR(80)",
+    "bank_account_name": "ALTER TABLE employees ADD COLUMN bank_account_name VARCHAR(100)",
+}
+
+
+def ensure_employee_schema(db: Session) -> None:
+    bind = db.get_bind()
+    inspector = inspect(bind)
+    if "employees" not in inspector.get_table_names():
+        return
+
+    column_names = {column["name"] for column in inspector.get_columns("employees")}
+    for column_name, ddl in EMPLOYEE_SCHEMA_COLUMNS.items():
+        if column_name not in column_names:
+            db.execute(text(ddl))
+    db.flush()