enhance(frontend): Better Timeline(MkPagination) Experience (#11066)

* enhance(frontend): Better MkPagination Appearance

* fix

* fix

* 新規投稿が空でも先頭に戻ったらunshiftItemsする

* use Map

* refactor, 型エラー潰し

* refactor

packages/frontend/src/pages/admin/abuses.vue

@@ -75,7 +75,7 @@ const pagination = {
 };
 
 function resolved(reportId) {
-	reports.removeItem(item => item.id === reportId);
+	reports.removeItem(reportId);
 }
 
 const headerActions = $computed(() => []);