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

layout/includes/third-party/search/local-search.pug

@@ -1,12 +1,20 @@
 #local-search
   .search-dialog
-    #local-search-title.search-dialog__title=_p("local_search.label")
-    #local-input-panel
+    nav.search-nav
+      span.search-dialog-title=_p("search.local_search.label")
+      span#loading-status
+      button.search-close-button
+        i.fas.fa-times
+
+    #loading-database.is-center
+      i.fas.fa-spinner.fa-pulse
+      span= '  ' + _p("search.load_data")
+
+    .search-wrap
       #local-search-input
         .local-search-box
-          input(placeholder=_p("local_search.input_placeholder") type="text").local-search-box--input
-    hr
-    #local-search-results
-    span.search-close-button
-      i.fas.fa-times
+          input(placeholder=_p("search.local_search.input_placeholder") type="text").local-search-box--input
+      hr
+      #local-search-results
+
   #search-mask