refactor: replace uni.showToast calls with shared toast

consolidates repeated toast display logic into a centralized utility, reducing code duplication and standardizing toast behavior across the codebase

src/pages/home/components/LongTextGuideCardPreview/poi.vue

@@ -95,10 +95,7 @@ import { SEND_MESSAGE_CONTENT_TEXT } from "@/constants/constant";
 const faq = ["古桥有什么传说", "最佳观赏时间", "旁边还有什么景点"];
 
 const showToast = (title) => {
-  uni.showToast({
-    title,
-    icon: "none",
-  });
+  showToast(title);
 };
 
 // 打开地图