breaking changes: algolia 升級至 v4

feat:  本地搜索增加數據庫加載中和搜索中 loading 顯示
feat: 更改文章美化後,列表的顯示效果 closed #693 closed #686
improvement: UI 微調

source/css/_highlight/highlight.styl

@@ -1,7 +1,5 @@
 $highlight_theme = hexo-config('highlight_theme')
-$highlighEnable = hexo-config('highlight_settings') && hexo-config('highlight_settings.enable')
-$prismjsEnable = hexo-config('prismjs_settings') && hexo-config('prismjs_settings.enable')
-wordWrap = !hexo-config('highlight_settings.line_number') && hexo-config('code_word_wrap')
+wordWrap = $highlight_enable && !$highlight_line_number && hexo-config('code_word_wrap')
 
 @require 'theme'
 
@@ -15,10 +13,10 @@ wordWrap = !hexo-config('highlight_settings.line_number') && hexo-config('code_w
   --hlscrollbar-bg: $highlight-scrollbar
   --hlexpand-bg: linear-gradient(180deg, rgba($highlight-background, .6), rgba($highlight-background, .9))
 
-if $highlighEnable
+if $highlight_enable
   @require 'highlight/index'
 
-if $prismjsEnable
+if $prismjs_enable
   @require 'prismjs/index'
 
 $code-block

source/css/_highlight/prismjs/index.styl

@@ -1,4 +1,4 @@
-if hexo-fonfig('prismjs_settings.line_number')
+if $prismjs_line_number
   @require 'line-number'
 
 if $highlight_theme != false

source/css/_highlight/theme.styl

@@ -13,7 +13,7 @@ if $highlight_theme == 'darker' || ($highlight_theme == 'mac')
   }
   $highlight-scrollbar = lighten($highlight-background, 8)
 
-  if $highlighEnable
+  if $highlight_enable
     $highlight-comment = #969896
     $highlight-red = #FF5370
     $highlight-orange = #F78C6C
@@ -39,7 +39,7 @@ if $highlight_theme == 'pale night'
   }
   $highlight-scrollbar = lighten($highlight-background, 8)
 
-  if $highlighEnable
+  if $highlight_enable
     $highlight-comment = #676E95
     $highlight-red = #FF5370
     $highlight-orange = #F78C6C
@@ -65,7 +65,7 @@ if $highlight_theme == 'ocean'
   }
   $highlight-scrollbar = lighten($highlight-background, 8)
 
-  if $highlighEnable
+  if $highlight_enable
     $highlight-comment = rgba(101, 115, 126, .8)
     $highlight-red = #FF5370
     $highlight-orange = #F78C6C
@@ -92,7 +92,7 @@ if $highlight_theme == 'light' || ($highlight_theme == 'mac light')
   }
   $highlight-scrollbar = darken($highlight-background, 8)
 
-  if $highlighEnable
+  if $highlight_enable
     $highlight-comment = rgba(149, 165, 166, .8)
     $highlight-red = #E53935
     $highlight-orange = #F76D47