fix(pl): 计划详情用关联证件附件替换危化品证书区。

Web 与 H5 详情将关联购买证/运输证移到装送货后并以附件卡片展示；用证接口回填证件附件 URL。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/services/pl_quota_planning.py

@@ -351,7 +351,11 @@ def get_plan_quota(db, user, plan_id):
                   ),
                   'usages': []}
         for usage in usages:
-            _get_row(db, user, usage.cert_type, usage.cert_id)
+            cert = _get_row(db, user, usage.cert_type, usage.cert_id)
             items = db.query(PlPlanCertUsageItem).filter_by(tenant_no=user.tenant_no, usage_id=usage.id, del_flag=0).order_by(PlPlanCertUsageItem.allocation_seq).all()
-            result['usages'].append({**_row_to_dict(usage), 'items': [_row_to_dict(row) for row in items]})
+            payload = {**_row_to_dict(usage), 'items': [_row_to_dict(row) for row in items]}
+            # 详情展示证面附件：用量行本身无附件字段，从证件档案回填
+            payload['attachmentUrls'] = getattr(cert, 'attachment_urls', None) or ''
+            payload['certNo'] = payload.get('certNo') or getattr(cert, 'cert_no', None) or usage.cert_no_snapshot
+            result['usages'].append(payload)
         return result