perf: backup import (#4866)

* i18n

* remove invalid code

* perf: backup import

* backup tip

* fix: indexsize invalid

packages/web/i18n/zh-Hant/account_usage.json

@@ -13,8 +13,10 @@
   "embedding_index": "索引生成",
   "every_day": "天",
   "every_month": "月",
+  "every_week": "每週",
   "export_confirm": "匯出確認",
   "export_confirm_tip": "目前共 {{total}} 筆使用記錄，確認匯出？",
+  "export_success": "導出成功",
   "export_title": "時間,成員,類型,項目名,AI 積分消耗",
   "feishu": "飛書",
   "generation_time": "生成時間",