fix: 修復上個版本導致的代碼塊部分css沒有生成的bugs

fix: 修復valine背景圖片再次出現時，由左到右移動的bugs
improvement: 調大sidebar的寬度
improvement: html結構調整，mobile-sidebar改為sidebar/search調整
remove: 刪除多餘的css和pug

layout/404.pug

@@ -25,5 +25,4 @@ html(lang=config.language data-theme=theme.display_mode)
             i.fas.fa-rocket
             = _p('error404.back_button')
           
-    !=partial('includes/third-party/search/index', {}, {cache:theme.fragment_cache})
     include includes/additional-js.pug

layout/includes/footer.pug

@@ -19,5 +19,5 @@
     .icp
       a(href=theme.footer.ICP.url)
         if theme.footer.ICP.icon
-          img.icp-icon(src=url_for(theme.footer.ICP.icon) alt='icp')
+          img.icp-icon(src=url_for(theme.footer.ICP.icon) alt='ICP')
         span=theme.footer.ICP.text

layout/includes/layout.pug

@@ -11,7 +11,7 @@ html(lang=config.language data-theme=theme.display_mode)
     if theme.background
       #web_bg
       
-    !=partial('includes/mobile-sidebar/index', {}, {cache:theme.fragment_cache})
+    !=partial('includes/sidebar', {}, {cache:theme.fragment_cache})
 
     #body-wrap
       include ./header/index.pug