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/point/detail.vue

@@ -442,7 +442,7 @@ export default {
 		// 立即购买
 		exchange() {
 			if (!this.storeToken) {
-				this.$refs.login.open('/pages_promotion/point/detail?id=' + this.id, 'redirectTo');
+				this.redirectTologin('/pages_promotion/point/detail?id=' + this.id);
 				return;
 			}
 			this.$refs.goodsSku.show('point');

pages_promotion/point/list.vue

@@ -490,7 +490,7 @@ export default {
 		},
 		//跳转至登录页面
 		login() {
-			this.$refs.login.open('/pages_promotion/point/list', 'redirectTo');
+			this.redirectTologin('/pages_promotion/point/list');
 		},
 		imgError(index) {
 			this.goodsList[index].image = this.$util.getDefaultImage().goods;
@@ -521,7 +521,8 @@ export default {
 		 */
 		redirect(url) {
 			if (!this.storeToken) {
-				this.$refs.login.open(url, 'redirectTo');
+				this.redirectTologin(url);
+				return;
 			} else {
 				this.$util.redirectTo(url);
 			}

pages_promotion/point/order_list.vue

@@ -124,14 +124,13 @@ export default {
 				}, 2000);
 			}
 		}, 1000);
-
-		if (!this.storeToken) {
-			this.$nextTick(() => {
-				this.$refs.login.open('/pages_promotion/point/order_list', 'redirectTo');
-			});
-		}
 	},
 	onShow() {
+		if (!this.storeToken) {
+			this.redirectTologin('/pages_promotion/point/order_list');
+			return;
+		}
+
 		if (this.$refs.mescroll) this.$refs.mescroll.refresh();
 	},
 	watch: {