feat: 美化 firefox 瀏覽器滾動條

fix: Utterances 評論區在多個頁面顯示的是同一個評論區
fix: 修復評論配置爲 Livere 和 Facebook Comments 時，最新評論模塊仍然顯示的 bug
improvement: blueimp_md5 CDN 可配置
improvement: timeline 優化
improvement: css優化
improvement: 友情鏈接優化

scripts/events/config.js

@@ -24,6 +24,7 @@ hexo.extend.filter.register('before_generate', () => {
     // comments
     gitalk: 'https://cdn.jsdelivr.net/npm/gitalk@latest/dist/gitalk.min.js',
     gitalk_css: 'https://cdn.jsdelivr.net/npm/gitalk/dist/gitalk.min.css',
+    blueimp_md5: 'https://cdn.jsdelivr.net/npm/blueimp-md5/js/md5.min.js',
     valine: 'https://cdn.jsdelivr.net/npm/valine/dist/Valine.min.js',
     disqusjs: 'https://cdn.jsdelivr.net/npm/disqusjs@1/dist/disqus.js',
     disqusjs_css: 'https://cdn.jsdelivr.net/npm/disqusjs@1/dist/disqusjs.css',

scripts/filters/random_cover.js

@@ -39,7 +39,7 @@ function randomCover () {
       return cover
     }
   } else {
-    cover = theme.default_top_img || 'https://cdn.jsdelivr.net/npm/butterfly-extsrc@1/img/default.jpg'
+    cover = theme.default_top_img || 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7'
     return cover
   }
 }

scripts/tag/timeline.js

@@ -9,9 +9,12 @@ function timeLineFn (args, content) {
   const tlBlock = /<!--\s*timeline (.*?)\s*-->\n([\w\W\s\S]*?)<!--\s*endtimeline\s*-->/g
 
   let result = ''
+  let color = ''
   if (args.length) {
-    args = hexo.render.renderSync({ text: args.join(' '), engine: 'markdown' })
-    result += `<div class='timeline-item headline'><div class='timeline-item-title'><div class='item-circle'>${args}</div></div></div>`
+    args = args.join(' ').split(',')
+    color = args[1]
+    const mdContent = hexo.render.renderSync({ text: args[0], engine: 'markdown' })
+    result += `<div class='timeline-item headline'><div class='timeline-item-title'><div class='item-circle'>${mdContent}</div></div></div>`
   }
 
   const matches = []
@@ -32,7 +35,7 @@ function timeLineFn (args, content) {
     result += `<div class='timeline-item'>${tlTitleHtml + tlContentHtml}</div>`
   }
 
-  return `<div class="timeline">${result}</div>`
+  return `<div class="timeline ${color}">${result}</div>`
 }
 
 hexo.extend.tag.register('timeline', timeLineFn, { ends: true })