fix: 修復夜間模式下，閲讀模式代碼塊背景顔色的顯示bug

fix: 修復在 chrome上，進入頁面時，頁面元素會出現模糊到清晰的bug close #479
fix: 修復 文章頁面上滑子菜單圖標文字無法顯示的 bug close #481
improvement: meta description 限制在150字以內 close #480
improvement: pug優化和結構調整

layout/includes/third-party/pjax.pug

@@ -7,7 +7,7 @@ script(src=url_for(theme.CDN.pjax))
 script.
   let pjaxSelectors = [
     'title',
-    '#config_change',
+    '#config-diff',
     '#body-wrap',
     '#rightside-config-hide',
     '#rightside-config-show',