feat: 资金管理强化—缺口预测+收付款计划+预警

backend/app/models/__init__.py

@@ -409,6 +409,22 @@ class CashForecast(Base):
     created_at = Column(DateTime, server_default=func.now())
 
 
+class CashPlan(Base):
+    """收付款计划 — 资金管理智能体"""
+    __tablename__ = "cash_plans"
+    id = Column(Integer, primary_key=True, index=True)
+    entity_id = Column(Integer, ForeignKey("entities.id"), default=1, comment="企业ID")
+    plan_type = Column(String(10), nullable=False, comment="receive收/pay付")
+    amount = Column(Float, nullable=False, comment="金额(万元)")
+    plan_date = Column(DateTime, nullable=False, comment="计划日期")
+    counterparty = Column(String(200), nullable=True, comment="关联客户/供应商")
+    description = Column(String(500), nullable=True, comment="说明")
+    status = Column(String(20), default="pending", comment="pending/completed/cancelled")
+    completed_at = Column(DateTime, nullable=True, comment="完成时间")
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())
+
+
 class SystemConfig(Base):
     """系统配置 — key-value存储"""
     __tablename__ = "system_configs"