管理后台前后端逻辑、UI美化

backend/app/services/document_service.py

@@ -17,6 +17,7 @@ from app.crud import distribution as distribution_crud
 from app.crud import document as document_crud
 from app.crud import document_version as version_crud
 from app.crud import member as member_crud
+from app.crud import site as site_crud
 from app.crud import study as study_crud
 from app.crud import user as user_crud
 from app.crud import version_workflow as workflow_crud
@@ -91,6 +92,10 @@ async def create_document(
     if doc_in.scope_type == DocumentScopeType.SITE and not doc_in.site_id:
         raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail="分中心文件需指定分中心")
     site_id = doc_in.site_id if doc_in.scope_type == DocumentScopeType.SITE else None
+    if site_id:
+        site = await site_crud.get_site(db, site_id)
+        if not site or not site.is_active:
+            raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="中心已停用")
     existing = await document_crud.get_by_trial_doc_no(db, doc_in.trial_id, doc_in.doc_no)
     if existing:
         raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail="文档编号已存在")