feat: 统一生产初始化流程并保护系统管理员

backend/app/crud/study.py

@@ -107,6 +107,7 @@ async def delete(db: AsyncSession, study_id: uuid.UUID) -> None:
     from app.models.finance_contract import FinanceContract
     from app.models.finance_special import FinanceSpecial
     from app.models.contract_fee import ContractFee
+    from app.models.contract_fee_payment import ContractFeePayment
     from app.models.special_expense import SpecialExpense
     from app.models.milestone import Milestone
     from app.models.document import Document
@@ -157,6 +158,13 @@ async def delete(db: AsyncSession, study_id: uuid.UUID) -> None:
     
     # 9. 删除财务相关
     await db.execute(sa_delete(SpecialExpense).where(SpecialExpense.project_id == study_id))
+    await db.execute(
+        sa_delete(ContractFeePayment).where(
+            ContractFeePayment.contract_fee_id.in_(
+                select(ContractFee.id).where(ContractFee.project_id == study_id)
+            )
+        )
+    )
     await db.execute(sa_delete(ContractFee).where(ContractFee.project_id == study_id))
     await db.execute(sa_delete(FinanceSpecial).where(FinanceSpecial.study_id == study_id))
     await db.execute(sa_delete(FinanceContract).where(FinanceContract.study_id == study_id))