breaking changes: 移除最新評論的評論服務商選擇，默認為第一個評論服務商

feat: 增加 waline avatarCDN 配置（最新評論也會更新）
feat: archives 的 標題 在 menu 配置中獲取
fix: 修復文章頁 mathjax 因字體小導致顯示重疊的 bug close #587
fix: 修復 mathjax 在列表下，導致 列表沒有樣式的 bug  close #586
improvement: 減少卡頓，apple 裝置首頁背景 background-attachment 設為 scroll

layout/includes/third-party/newest-comments/disqus-comment.pug

@@ -15,7 +15,7 @@ script.
     }
 
     const getComment = () => {
-      fetch('https://disqus.com/api/3.0/forums/listPosts.json?forum=!{theme.newest_comments.disqus.forum}&related=thread&limit=!{theme.newest_comments.limit}&api_key=!{theme.newest_comments.disqus.api_key}')
+      fetch('https://disqus.com/api/3.0/forums/listPosts.json?forum=!{forum}&related=thread&limit=!{theme.newest_comments.limit}&api_key=!{apiKey}')
         .then(response => response.json())
         .then(data => {
           const disqusArray = data.response.map(item => {

layout/includes/third-party/newest-comments/github-issues.pug

@@ -38,7 +38,7 @@ script.
     }
 
     const getComment = () => {
-      fetch('https://api.github.com/repos/!{theme.newest_comments.github_issues.repo}/issues/comments?sort=updated&direction=desc&per_page=!{theme.newest_comments.limit}&page=1',{
+      fetch('https://api.github.com/repos/!{userRepo}/issues/comments?sort=updated&direction=desc&per_page=!{theme.newest_comments.limit}&page=1',{
         "headers": {
           Accept: 'application/vnd.github.v3.html+json'
         }

layout/includes/third-party/newest-comments/index.pug

@@ -1,12 +1,26 @@
-- let config = theme.newest_comments
+- let { use } = theme.comments
 
-if config.valine
-  include ./valine.pug
-else if config.waline
-  include ./waline.pug
-else if config.github_issues.enable
-  include ./github-issues.pug
-else if config.disqus.enable
-  include ./disqus-comment.pug
-else if config.twikoo
-  include ./twikoo-comment.pug
+if use
+  - let forum,apiKey,userRepo
+  case use[0]
+    when 'Valine'
+      include ./valine.pug
+    when 'Waline'
+      include ./waline.pug
+    when 'Twikoo'
+      include ./twikoo-comment.pug
+    when 'Disqus'
+      - forum = theme.disqus.shortname
+      - apiKey = theme.disqus.apikey
+      include ./disqus-comment.pug
+    when 'Disqusjs'
+      - forum = theme.disqusjs.shortname
+      - apiKey = theme.disqusjs.apikey
+      include ./disqus-comment.pug
+    when 'Gitalk'
+      - let { repo,owner } = theme.gitalk
+      - userRepo = owner + '/' + repo
+      include ./github-issues.pug
+    when 'Utterances'
+      - userRepo = theme.utterances.repo
+      include ./github-issues.pug

layout/includes/third-party/newest-comments/waline.pug

@@ -1,4 +1,4 @@
-- let default_avatar = theme.waline.avatar
+- let { avatar,avatarCDN } = theme.waline
 
 script.
   window.addEventListener('load', () => {
@@ -16,10 +16,10 @@ script.
       return content
     }
 
-    const getIcon = (avatar,mail) => {
-      if (avatar) return avatar
-      let defaultIcon = '!{ default_avatar ? `?d=${default_avatar}` : ''}'
-      let iconUrl = `https://gravatar.loli.net/avatar/${mail + defaultIcon}`
+    const getIcon = (ava,mail) => {
+      if (ava) return ava
+      let defaultIcon = '!{ avatar ? `?d=${avatar}` : ''}'
+      let iconUrl = "!{avatarCDN ? avatarCDN : 'https://gravatar.loli.net/avatar/'}" + mail + defaultIcon
       return iconUrl
     }