add paste

dashboard/src/locales/zh-Hans/buttons.ts

@@ -25,6 +25,8 @@ const items = {
   "buttons.lesson.add.lesson": "加入",
   "buttons.ok": "确定",
   "buttons.close": "关闭",
+  "buttons.copy": "复制",
+  "buttons.paste": "粘贴",
   "buttons.copy.to": "复制到",
   "buttons.copy.text": "复制文本",
   "buttons.copy.pali.text": "复制巴利语文本",