feat: enhance mailto/tel link handling and streamline imports

- Introduced isMailOrTelLink utility function to validate mailto/tel links.
- Updated getPageProperties to properly handle mailto/tel links with target=_self, preventing unintended conversion to internal links by avoiding the addition of slashes.

Closes #3485

lib/utils/index.js

@@ -104,6 +104,15 @@ export function checkStartWithHttp(str) {
   }
 }
 
+/**
+ * 检查是否是邮件或电话链接
+ * @param href
+ * @returns {boolean}
+ */
+export function isMailOrTelLink(href) {
+  return /^(mailto:|tel:)/i.test(href)
+}
+
 // 检查一个字符串是否UUID https://ihateregex.io/expr/uuid/
 export function checkStrIsUuid(str) {
   if (!str) {