feat: 费用审核智能体—规则+报销流程+看板

backend/app/models/__init__.py

@@ -530,3 +530,49 @@ class VoucherDetail(Base):
     new_standard_category = Column(String(20), nullable=True, comment="新30号准则分类")
     period = Column(String(20), nullable=True, comment="期间 YYYY-MM")
     created_at = Column(DateTime, server_default=func.now())
+
+
+# ============================================================
+# 费用审核智能体 (2026-08)
+# ============================================================
+
+class ExpenseRule(Base):
+    """费用规则 — 自动校验报销单的标准"""
+    __tablename__ = "expense_rules"
+    id = Column(Integer, primary_key=True, index=True)
+    rule_name = Column(String(100), nullable=False, comment="规则名称")
+    dimension = Column(String(20), nullable=False, comment="维度: department/person/expense_type")
+    dimension_value = Column(String(100), nullable=True, comment="维度值: 部门名/人员名/费用类型(空=全局)")
+    expense_type = Column(String(30), nullable=False, comment="费用类型: entertainment/travel/office/management")
+    limit_type = Column(String(20), nullable=False, comment="限额类型: single/monthly/yearly 单笔/月度累计/年度累计")
+    limit_amount = Column(Float, nullable=False, comment="限额金额")
+    cycle = Column(String(20), default="monthly", comment="周期: single/monthly/yearly")
+    status = Column(String(20), default="active", comment="active/inactive")
+    remark = Column(String(500), nullable=True, comment="备注")
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())
+
+
+class ExpenseReimbursement(Base):
+    """费用报销单 — 提交后自动校验规则，超限自动打回"""
+    __tablename__ = "expense_reimbursements"
+    id = Column(Integer, primary_key=True, index=True)
+    reimb_no = Column(String(50), unique=True, nullable=False, comment="报销单号")
+    applicant = Column(String(100), nullable=False, comment="申请人")
+    department = Column(String(100), nullable=True, comment="部门")
+    expense_type = Column(String(30), nullable=False, comment="费用类型: entertainment/travel/office/management")
+    title = Column(String(200), nullable=False, comment="事由/摘要")
+    amount = Column(Float, nullable=False, comment="报销金额")
+    expense_date = Column(DateTime, nullable=True, comment="费用发生日期")
+    attachment = Column(String(500), nullable=True, comment="附件文件名")
+    status = Column(String(20), default="pending", comment="pending待审批/approved已通过/rejected已拒绝/returned已打回")
+    check_result = Column(String(20), default="pass", comment="自动校验结果: pass/fail")
+    check_reason = Column(String(1000), nullable=True, comment="超限原因")
+    check_detail = Column(JSON, nullable=True, comment="校验明细: [{rule_name, limit, actual, passed}]")
+    checked_at = Column(DateTime, nullable=True, comment="自动校验时间")
+    approver = Column(String(100), nullable=True, comment="审批人")
+    approve_comment = Column(String(500), nullable=True, comment="审批意见")
+    approved_at = Column(DateTime, nullable=True, comment="审批时间")
+    created_by = Column(String(100), nullable=True, comment="提交人")
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())