feat: 默认主题 dark mode

resource/template/component/cron.html

@@ -60,7 +60,7 @@
             </p>
         </div>
     </div>
-    <div class=" actions">
+    <div class="actions">
         <div class="ui negative button">{{tr "Cancel"}}</div>
         <button class="ui positive nezha-primary-btn right labeled icon button">{{tr "Confirm"}}<i class="checkmark icon"></i>
         </button>