迁移合同费用通用附件

1、删除旧费用附件 API、CRUD、模型和专用前端面板，统一改用通用附件能力。

2、调整合同费用接口为 study_id 语义，并补充合同、凭证、发票等附件类型的权限映射。

3、将合同费用新建和编辑改为抽屉流程，详情页与列表页复用同一编辑组件。

4、补充数据库迁移、附件列表、合同费用抽屉和权限场景测试，覆盖旧权限移除与新流程。

backend/app/crud/contract_fee.py

@@ -16,7 +16,7 @@ async def create_contract_fee(
     contract_in: ContractFeeCreate,
 ) -> ContractFee:
     contract = ContractFee(
-        project_id=contract_in.project_id,
+        project_id=contract_in.study_id,
         center_id=contract_in.center_id,
         contract_no=contract_in.contract_no,
         signed_date=contract_in.signed_date,
@@ -39,18 +39,18 @@ async def get_contract_fee(db: AsyncSession, contract_id: uuid.UUID) -> Contract
     return result.scalar_one_or_none()
 
 
-async def get_contract_fee_by_project_center(
-    db: AsyncSession, project_id: uuid.UUID, center_id: uuid.UUID
+async def get_contract_fee_by_study_center(
+    db: AsyncSession, study_id: uuid.UUID, center_id: uuid.UUID
 ) -> ContractFee | None:
     result = await db.execute(
-        select(ContractFee).where(ContractFee.project_id == project_id, ContractFee.center_id == center_id)
+        select(ContractFee).where(ContractFee.project_id == study_id, ContractFee.center_id == center_id)
     )
     return result.scalar_one_or_none()
 
 
 async def list_contract_fees(
     db: AsyncSession,
-    project_id: uuid.UUID,
+    study_id: uuid.UUID,
     center_id: uuid.UUID | None = None,
     center_ids: set[uuid.UUID] | None = None,
     q: str | None = None,
@@ -81,7 +81,7 @@ async def list_contract_fees(
         )
         .join(Site, Site.id == ContractFee.center_id)
         .outerjoin(ContractFeePayment, ContractFeePayment.contract_fee_id == ContractFee.id)
-        .where(ContractFee.project_id == project_id)
+        .where(ContractFee.project_id == study_id)
         .group_by(ContractFee.id, Site.name)
     )
 

backend/app/crud/fee_attachment.py

@@ -1,70 +0,0 @@
-import uuid
-from typing import Sequence
-
-from sqlalchemy import select
-from sqlalchemy.ext.asyncio import AsyncSession
-
-from app.models.fee_attachment import FeeAttachment
-
-
-async def create_attachment(
-    db: AsyncSession,
-    *,
-    entity_type: str,
-    entity_id: uuid.UUID,
-    file_type: str,
-    filename: str,
-    mime_type: str | None,
-    size: int,
-    storage_key: str | None,
-    url: str | None,
-    uploaded_by: uuid.UUID,
-) -> FeeAttachment:
-    attachment = FeeAttachment(
-        entity_type=entity_type,
-        entity_id=entity_id,
-        file_type=file_type,
-        filename=filename,
-        mime_type=mime_type,
-        size=size,
-        storage_key=storage_key,
-        url=url,
-        uploaded_by=uploaded_by,
-    )
-    db.add(attachment)
-    await db.commit()
-    await db.refresh(attachment)
-    return attachment
-
-
-async def list_attachments(
-    db: AsyncSession,
-    *,
-    entity_type: str,
-    entity_id: uuid.UUID,
-) -> Sequence[FeeAttachment]:
-    result = await db.execute(
-        select(FeeAttachment)
-        .where(
-            FeeAttachment.entity_type == entity_type,
-            FeeAttachment.entity_id == entity_id,
-            FeeAttachment.is_deleted.is_(False),
-        )
-        .order_by(FeeAttachment.uploaded_at.desc())
-    )
-    return result.scalars().all()
-
-
-async def get_attachment(db: AsyncSession, attachment_id: uuid.UUID) -> FeeAttachment | None:
-    result = await db.execute(
-        select(FeeAttachment).where(FeeAttachment.id == attachment_id, FeeAttachment.is_deleted.is_(False))
-    )
-    return result.scalar_one_or_none()
-
-
-async def soft_delete_attachment(db: AsyncSession, attachment: FeeAttachment) -> FeeAttachment:
-    attachment.is_deleted = True
-    db.add(attachment)
-    await db.commit()
-    await db.refresh(attachment)
-    return attachment