修复配置了prefix后，部分页面无法打开的bug

lib/notion/getPageProperties.js

@@ -6,9 +6,9 @@ import formatDate from '../utils/formatDate'
 import md5 from 'js-md5'
 import { siteConfig } from '../config'
 import {
-  checkStartWithHttp,
-  convertUrlStartWithOneSlash,
-  getLastSegmentFromUrl
+    checkStartWithHttp,
+    convertUrlStartWithOneSlash,
+    getLastSegmentFromUrl
 } from '../utils'
 import { extractLangPrefix } from '../utils/pageId'
 import { mapImgUrl } from './mapImage'
@@ -290,5 +290,10 @@ function generateCustomizeSlug(postProperties, NOTION_CONFIG) {
   if (fullPrefix.endsWith('/')) {
     fullPrefix = fullPrefix.substring(0, fullPrefix.length - 1) // 去掉尾部部的"/"
   }
-  return `${fullPrefix}/${postProperties.slug ?? postProperties.id}`
+
+  if(fullPrefix){
+    return `${fullPrefix}/${postProperties.slug ?? postProperties.id}`
+  }else{
+    return `${postProperties.slug ?? postProperties.id}`
+  }
 }