refactor: 统一替换登录跳转逻辑为通用方法

将项目内多处手动调用$refs.login.open的登录跳转逻辑，统一替换为新增的redirectTologin通用方法，简化代码并提升维护性，同时统一处理了延迟和nextTick调用逻辑。

pages_promotion/fenxiao/order.vue

@@ -155,9 +155,7 @@ export default {
 		if (this.fenxiaoWords && this.fenxiaoWords.concept) this.$langConfig.title(this.fenxiaoWords.concept + this.$lang('orderSuffix'));
 
 		if (!this.storeToken) {
-			this.$nextTick(() => {
-				this.$refs.login.open('/pages_promotion/fenxiao/order', 'redirectTo');
-			});
+			this.redirectTologin('/pages_promotion/fenxiao/order');
 		}
 	},
 	methods: {