fix(frontend): ストレージが消去される事がある問題を軽減 (#16704)

* fix(frontend): ストレージが消去される事がある問題を軽減

* add comment

* add catch to continue request permissions

* Update Changelog

* update changelog

* fix

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* fix

* wip

* Update main-boot.ts

* wip

---------

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/frontend/src/utility/storage.ts

@@ -0,0 +1,34 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { computed, ref, shallowRef, watch, defineAsyncComponent } from 'vue';
+import * as os from '@/os.js';
+import { store } from '@/store.js';
+import { i18n } from '@/i18n.js';
+
+export const storagePersisted = ref(await navigator.storage.persisted());
+
+export async function enableStoragePersistence() {
+	try {
+		const persisted = await navigator.storage.persist();
+		if (persisted) {
+			storagePersisted.value = true;
+		} else {
+			os.alert({
+				type: 'error',
+				text: i18n.ts.somethingHappened,
+			});
+		}
+	}	catch (err) {
+		os.alert({
+			type: 'error',
+			text: i18n.ts.somethingHappened,
+		});
+	}
+}
+
+export function skipStoragePersistence() {
+	store.set('showStoragePersistenceSuggestion', false);
+}