fix(contractManage): 修复悬浮按钮可能被遮挡的问题

添加z-index属性确保悬浮按钮始终显示在最上层

pages_order/contract/contractManage.vue

@@ -84,6 +84,7 @@
 			align-items: center;
 			justify-content: center;
 			background-color: $uni-color;
+			z-index: 999;
 		}
 	}
 </style>