simplify decision making and make new toast

packages/app/resource/locales/en_US/translation.json

@@ -438,6 +438,7 @@
     "recursively": "Delete pages under this path recursively.",
     "completely": "Delete completely instead of putting it into trash."
   },
+  "deleted_page": "Page has been deleted",
   "deleted_pages": "{{path}} has been deleted",
   "deleted_pages_completely": "{{path}} has been deleted completely",
   "renamed_pages": "{{path}} has been renamed",

packages/app/resource/locales/ja_JP/translation.json

@@ -438,6 +438,7 @@
     "recursively": "配下のページも削除します",
     "completely": "ゴミ箱を経由せず、完全に削除します"
   },
+  "deleted_page": "ページが削除されました",
   "deleted_pages": "{{path}} をゴミ箱に入れました",
   "deleted_pages_completely": "{{path}} を完全に削除しました",
   "renamed_pages": "{{path}} を移動/名前変更しました",

packages/app/resource/locales/zh_CN/translation.json

@@ -417,6 +417,7 @@
 		"recursively": "Delete children of <code>%s</code> recursively.",
 		"completely": "Delete completely instead of putting it into trash."
   },
+  "deleted_page": "删去的页面。",
   "deleted_pages": "将 {{path}} 放入垃圾箱",
   "deleted_pages_completely": "{{path}} 已被完全删除",
   "renamed_pages": "移动/重命名 {{path}}",

packages/app/src/components/DescendantsPageList.tsx

@@ -63,10 +63,9 @@ export const DescendantsPageListSubstance = (props: SubstanceProps): JSX.Element
 
   const pageDeletedHandler: OnDeletedFunction = useCallback((...args) => {
     if (args[0] == null || args[2] == null) {
-      toastSuccess('ページを削除しました');
+      toastSuccess(t('deleted_page'));
       return;
     }
-
     toastSuccess(args[2] ? t('deleted_pages_completely', { path: args[0] }) : t('deleted_pages', { path: args[0] }));
 
     advancePt();