improvements: 代碼名全大寫

improvements: 補全card-categories和card-archives的 '查看更多‘鏈接 close #337
fix: 修復comments沒設置時，報Unexpected token ')'的bugs close #344
improvements: 優化js和html
fix: 修復toc 滾動百分比不準的Bugs

layout/includes/head/darkmode.pug

@@ -25,7 +25,6 @@ if theme.darkmode.enable
         if (isLightMode) activateLightMode()
         else if (isDarkMode) activateDarkMode()
         else if (isNotSpecified || hasNoSupport) {
-          console.log('You specified no preference for a color scheme or your browser does not support it. I Schedule dark mode during night time.')
           var now = new Date()
           var hour = now.getHours()
           var isNight = hour <= 6 || hour >= 18

layout/includes/head/preconnect.pug

@@ -12,7 +12,7 @@ if theme.tencent_analytics
 if theme.cnzz_analytics
   link(rel="preconnect" href="//s4.cnzz.com")
 
-if theme.blog_title_font.font_link && theme.blog_title_font.font_link.indexOf('//fonts.googleapis.com') != -1
+if theme.blog_title_font && theme.blog_title_font.font_link && theme.blog_title_font.font_link.indexOf('//fonts.googleapis.com') != -1
   link(rel="preconnect" href="//fonts.googleapis.com" crossorigin)
 
 if theme.busuanzi.site_uv || theme.busuanzi.site_pv || theme.busuanzi.page_pv