diff --git a/CHANGELOG.md b/CHANGELOG.md
index c28d0b9bfb..8d6dd3a7db 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,11 @@
 - 見たことのあるRenoteを省略して表示をオンのときに自分のnoteのrenoteを省略するように
 - フォルダーやファイルに対しても開発者モード使用時、IDをコピーできるように
 - 引用対象を「もっと見る」で展開した場合、「閉じる」で畳めるように
+- プロフィールURLをコピーできるボタンを追加 #11190
+- ユーザーのContextMenuに「アンテナに追加」ボタンを追加
+- フォローやお気に入り登録をしていないチャンネルを開く時は概要ページを開くように
+- 画面ビューワをタップした場合、マウスクリックと同様に画像ビューワを閉じるように
+- オフライン時の画面にリロードボタンを追加
 - Fix: サーバーメトリクスが90度傾いている
 - Fix: 非ログイン時にクレデンシャルが必要なページに行くとエラーが出る問題を修正
 - Fix: sparkle内にリンクを入れるとクリック不能になる問題の修正
@@ -33,6 +38,7 @@
 - Fix: ページ遷移でスクロール位置が保持されない問題を修正
 - Fix: フォルダーのページネーションが機能しない #11180
 - Fix: 長い文章を投稿する際、プレビューが画面からはみ出る問題を修正
+- Fix: システムフォント設定が正しく反映されない問題を修正
 
 ### Server
 - JSON.parse の回数を削減することで、ストリーミングのパフォーマンスを向上しました
diff --git a/gulpfile.js b/gulpfile.mjs
similarity index 88%
rename from gulpfile.js
rename to gulpfile.mjs
index 6507aad60e..9556eb795f 100644
--- a/gulpfile.js
+++ b/gulpfile.mjs
@@ -2,14 +2,14 @@
  * Gulp tasks
  */
 
-const fs = require('fs');
-const gulp = require('gulp');
-const replace = require('gulp-replace');
-const terser = require('gulp-terser');
-const cssnano = require('gulp-cssnano');
+import * as fs from 'node:fs';
+import gulp from 'gulp';
+import replace from 'gulp-replace';
+import terser from 'gulp-terser';
+import cssnano from 'gulp-cssnano';
 
-const locales = require('./locales');
-const meta = require('./package.json');
+import locales from './locales/index.js';
+import meta from './package.json' assert { type: "json" };
 
 gulp.task('copy:backend:views', () =>
 	gulp.src('./packages/backend/src/server/web/views/**/*').pipe(gulp.dest('./packages/backend/built/server/web/views'))
diff --git a/locales/generateDTS.js b/locales/generateDTS.js
index 5949aee7cd..bc98276325 100644
--- a/locales/generateDTS.js
+++ b/locales/generateDTS.js
@@ -1,6 +1,6 @@
-const fs = require('fs');
-const yaml = require('js-yaml');
-const ts = require('typescript');
+import * as fs from 'node:fs';
+import * as yaml from 'js-yaml';
+import * as ts from 'typescript';
 
 function createMembers(record) {
 	return Object.entries(record)
@@ -14,7 +14,7 @@ function createMembers(record) {
 		));
 }
 
-module.exports = function generateDTS() {
+export default function generateDTS() {
 	const locale = yaml.load(fs.readFileSync(`${__dirname}/ja-JP.yml`, 'utf-8'));
 	const members = createMembers(locale);
 	const elements = [
diff --git a/locales/index.d.ts b/locales/index.d.ts
index dacab0cca5..7555984b24 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -52,6 +52,7 @@ export interface Locale {
     "deleteAndEdit": string;
     "deleteAndEditConfirm": string;
     "addToList": string;
+    "addToAntenna": string;
     "sendMessage": string;
     "copyRSS": string;
     "copyUsername": string;
@@ -59,6 +60,7 @@ export interface Locale {
     "copyNoteId": string;
     "copyFileId": string;
     "copyFolderId": string;
+    "copyProfileUrl": string;
     "searchUser": string;
     "reply": string;
     "loadMore": string;
@@ -2156,4 +2158,4 @@ export interface Locale {
 declare const locales: {
     [lang: string]: Locale;
 };
-export = locales;
+export default locales;
diff --git a/locales/index.js b/locales/index.js
index 2248bb6ac9..7801f1275b 100644
--- a/locales/index.js
+++ b/locales/index.js
@@ -2,8 +2,8 @@
  * Languages Loader
  */
 
-const fs = require('fs');
-const yaml = require('js-yaml');
+import * as fs from 'node:fs';
+import * as yaml from 'js-yaml';
 
 const merge = (...args) => args.reduce((a, c) => ({
 	...a,
@@ -51,9 +51,9 @@ const primaries = {
 // 何故か文字列にバックスペース文字が混入することがあり、YAMLが壊れるので取り除く
 const clean = (text) => text.replace(new RegExp(String.fromCodePoint(0x08), 'g'), '');
 
-const locales = languages.reduce((a, c) => (a[c] = yaml.load(clean(fs.readFileSync(`${__dirname}/${c}.yml`, 'utf-8'))) || {}, a), {});
+const locales = languages.reduce((a, c) => (a[c] = yaml.load(clean(fs.readFileSync(new URL(`${c}.yml`, import.meta.url), 'utf-8'))) || {}, a), {});
 
-module.exports = Object.entries(locales)
+export default Object.entries(locales)
 	.reduce((a, [k ,v]) => (a[k] = (() => {
 		const [lang] = k.split('-');
 		switch (k) {
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 29f157b849..82efc8a469 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -49,6 +49,7 @@ delete: "削除"
 deleteAndEdit: "削除して編集"
 deleteAndEditConfirm: "このノートを削除してもう一度編集しますか？このノートへのリアクション、Renote、返信も全て削除されます。"
 addToList: "リストに追加"
+addToAntenna: "アンテナに追加"
 sendMessage: "メッセージを送信"
 copyRSS: "RSSをコピー"
 copyUsername: "ユーザー名をコピー"
@@ -56,6 +57,7 @@ copyUserId: "ユーザーIDをコピー"
 copyNoteId: "ノートIDをコピー"
 copyFileId: "ファイルIDをコピー"
 copyFolderId: "フォルダーIDをコピー"
+copyProfileUrl: "プロフィールURLをコピー"
 searchUser: "ユーザーを検索"
 reply: "返信"
 loadMore: "もっと見る"
diff --git a/locales/package.json b/locales/package.json
new file mode 100644
index 0000000000..bedb411a91
--- /dev/null
+++ b/locales/package.json
@@ -0,0 +1,3 @@
+{
+	"type": "module"
+}
diff --git a/packages/backend/src/core/FetchInstanceMetadataService.ts b/packages/backend/src/core/FetchInstanceMetadataService.ts
index a0afaaf888..9e8d17442f 100644
--- a/packages/backend/src/core/FetchInstanceMetadataService.ts
+++ b/packages/backend/src/core/FetchInstanceMetadataService.ts
@@ -103,7 +103,7 @@ export class FetchInstanceMetadataService {
 
 			if (name) updates.name = name;
 			if (description) updates.description = description;
-			if (icon || favicon) updates.iconUrl = icon ?? favicon;
+			if (icon || favicon) updates.iconUrl = (icon && !icon.includes('data:image/png;base64')) ? icon : favicon;
 			if (favicon) updates.faviconUrl = favicon;
 			if (themeColor) updates.themeColor = themeColor;
 
diff --git a/packages/backend/src/core/NoteCreateService.ts b/packages/backend/src/core/NoteCreateService.ts
index fb36ca3b6a..4f3d66dd58 100644
--- a/packages/backend/src/core/NoteCreateService.ts
+++ b/packages/backend/src/core/NoteCreateService.ts
@@ -570,12 +570,14 @@ export class NoteCreateService implements OnApplicationShutdown {
 			if (data.reply) {
 				// 通知
 				if (data.reply.userHost === null) {
-					const threadMuted = await this.noteThreadMutingsRepository.findOneBy({
-						userId: data.reply.userId,
-						threadId: data.reply.threadId ?? data.reply.id,
+					const isThreadMuted = await this.noteThreadMutingsRepository.exist({
+						where: {
+							userId: data.reply.userId,
+							threadId: data.reply.threadId ?? data.reply.id,
+						}
 					});
 
-					if (!threadMuted) {
+					if (!isThreadMuted) {
 						nm.push(data.reply.userId, 'reply');
 						this.globalEventService.publishMainStream(data.reply.userId, 'reply', noteObj);
 
@@ -712,12 +714,14 @@ export class NoteCreateService implements OnApplicationShutdown {
 	@bindThis
 	private async createMentionedEvents(mentionedUsers: MinimumUser[], note: Note, nm: NotificationManager) {
 		for (const u of mentionedUsers.filter(u => this.userEntityService.isLocalUser(u))) {
-			const threadMuted = await this.noteThreadMutingsRepository.findOneBy({
-				userId: u.id,
-				threadId: note.threadId ?? note.id,
+			const isThreadMuted = await this.noteThreadMutingsRepository.exist({
+				where: {
+					userId: u.id,
+					threadId: note.threadId ?? note.id,
+				},
 			});
 
-			if (threadMuted) {
+			if (isThreadMuted) {
 				continue;
 			}
 
diff --git a/packages/backend/src/core/NoteReadService.ts b/packages/backend/src/core/NoteReadService.ts
index b84591e26d..52e9bd369a 100644
--- a/packages/backend/src/core/NoteReadService.ts
+++ b/packages/backend/src/core/NoteReadService.ts
@@ -43,11 +43,13 @@ export class NoteReadService implements OnApplicationShutdown {
 		//#endregion
 
 		// スレッドミュート
-		const threadMute = await this.noteThreadMutingsRepository.findOneBy({
-			userId: userId,
-			threadId: note.threadId ?? note.id,
+		const isThreadMuted = await this.noteThreadMutingsRepository.exist({
+			where: {
+				userId: userId,
+				threadId: note.threadId ?? note.id,
+			},
 		});
-		if (threadMute) return;
+		if (isThreadMuted) return;
 
 		const unread = {
 			id: this.idService.genId(),
@@ -62,9 +64,9 @@ export class NoteReadService implements OnApplicationShutdown {
 
 		// 2秒経っても既読にならなかったら「未読の投稿がありますよ」イベントを発行する
 		setTimeout(2000, 'unread note', { signal: this.#shutdownController.signal }).then(async () => {
-			const exist = await this.noteUnreadsRepository.findOneBy({ id: unread.id });
+			const exist = await this.noteUnreadsRepository.exist({ where: { id: unread.id } });
 
-			if (exist == null) return;
+			if (!exist) return;
 
 			if (params.isMentioned) {
 				this.globalEventService.publishMainStream(userId, 'unreadMention', note.id);
diff --git a/packages/backend/src/core/SignupService.ts b/packages/backend/src/core/SignupService.ts
index e6b17a8741..1e44406c16 100644
--- a/packages/backend/src/core/SignupService.ts
+++ b/packages/backend/src/core/SignupService.ts
@@ -71,12 +71,12 @@ export class SignupService {
 		const secret = generateUserToken();
 
 		// Check username duplication
-		if (await this.usersRepository.findOneBy({ usernameLower: username.toLowerCase(), host: IsNull() })) {
+		if (await this.usersRepository.exist({ where: { usernameLower: username.toLowerCase(), host: IsNull() } })) {
 			throw new Error('DUPLICATED_USERNAME');
 		}
 
 		// Check deleted username duplication
-		if (await this.usedUsernamesRepository.findOneBy({ username: username.toLowerCase() })) {
+		if (await this.usedUsernamesRepository.exist({ where: { username: username.toLowerCase() } })) {
 			throw new Error('USED_USERNAME');
 		}
 
diff --git a/packages/backend/src/core/UserFollowingService.ts b/packages/backend/src/core/UserFollowingService.ts
index 7d90bc2c08..4d7bfeaf23 100644
--- a/packages/backend/src/core/UserFollowingService.ts
+++ b/packages/backend/src/core/UserFollowingService.ts
@@ -122,22 +122,26 @@ export class UserFollowingService implements OnModuleInit {
 			let autoAccept = false;
 
 			// 鍵アカウントであっても、既にフォローされていた場合はスルー
-			const following = await this.followingsRepository.findOneBy({
-				followerId: follower.id,
-				followeeId: followee.id,
+			const isFollowing = await this.followingsRepository.exist({
+				where: {
+					followerId: follower.id,
+					followeeId: followee.id,
+				},
 			});
-			if (following) {
+			if (isFollowing) {
 				autoAccept = true;
 			}
 
 			// フォローしているユーザーは自動承認オプション
 			if (!autoAccept && (this.userEntityService.isLocalUser(followee) && followeeProfile.autoAcceptFollowed)) {
-				const followed = await this.followingsRepository.findOneBy({
-					followerId: followee.id,
-					followeeId: follower.id,
+				const isFollowed = await this.followingsRepository.exist({
+					where: {
+						followerId: followee.id,
+						followeeId: follower.id,
+					},
 				});
 
-				if (followed) autoAccept = true;
+				if (isFollowed) autoAccept = true;
 			}
 
 			// Automatically accept if the follower is an account who has moved and the locked followee had accepted the old account.
@@ -206,12 +210,14 @@ export class UserFollowingService implements OnModuleInit {
 
 		this.cacheService.userFollowingsCache.refresh(follower.id);
 
-		const req = await this.followRequestsRepository.findOneBy({
-			followeeId: followee.id,
-			followerId: follower.id,
+		const requestExist = await this.followRequestsRepository.exist({
+			where: {
+				followeeId: followee.id,
+				followerId: follower.id,
+			},
 		});
 
-		if (req) {
+		if (requestExist) {
 			await this.followRequestsRepository.delete({
 				followeeId: followee.id,
 				followerId: follower.id,
@@ -505,12 +511,14 @@ export class UserFollowingService implements OnModuleInit {
 			}
 		}
 
-		const request = await this.followRequestsRepository.findOneBy({
-			followeeId: followee.id,
-			followerId: follower.id,
+		const requestExist = await this.followRequestsRepository.exist({
+			where: {
+				followeeId: followee.id,
+				followerId: follower.id,
+			},
 		});
 
-		if (request == null) {
+		if (!requestExist) {
 			throw new IdentifiableError('17447091-ce07-46dd-b331-c1fd4f15b1e7', 'request not found');
 		}
 
diff --git a/packages/backend/src/core/activitypub/ApAudienceService.ts b/packages/backend/src/core/activitypub/ApAudienceService.ts
index 0eab7fa335..a4ab5eae20 100644
--- a/packages/backend/src/core/activitypub/ApAudienceService.ts
+++ b/packages/backend/src/core/activitypub/ApAudienceService.ts
@@ -16,6 +16,8 @@ type AudienceInfo = {
 	visibleUsers: User[],
 };
 
+type GroupedAudience = Record<'public' | 'followers' | 'other', string[]>;
+
 @Injectable()
 export class ApAudienceService {
 	constructor(
@@ -67,11 +69,11 @@ export class ApAudienceService {
 	}
 
 	@bindThis
-	private groupingAudience(ids: string[], actor: RemoteUser) {
-		const groups = {
-			public: [] as string[],
-			followers: [] as string[],
-			other: [] as string[],
+	private groupingAudience(ids: string[], actor: RemoteUser): GroupedAudience {
+		const groups: GroupedAudience = {
+			public: [],
+			followers: [],
+			other: [],
 		};
 
 		for (const id of ids) {
@@ -90,7 +92,7 @@ export class ApAudienceService {
 	}
 
 	@bindThis
-	private isPublic(id: string) {
+	private isPublic(id: string): boolean {
 		return [
 			'https://www.w3.org/ns/activitystreams#Public',
 			'as#Public',
@@ -99,9 +101,7 @@ export class ApAudienceService {
 	}
 
 	@bindThis
-	private isFollowers(id: string, actor: RemoteUser) {
-		return (
-			id === (actor.followersUri ?? `${actor.uri}/followers`)
-		);
+	private isFollowers(id: string, actor: RemoteUser): boolean {
+		return id === (actor.followersUri ?? `${actor.uri}/followers`);
 	}
 }
diff --git a/packages/backend/src/core/activitypub/ApDbResolverService.ts b/packages/backend/src/core/activitypub/ApDbResolverService.ts
index 20283a163c..d5a530c903 100644
--- a/packages/backend/src/core/activitypub/ApDbResolverService.ts
+++ b/packages/backend/src/core/activitypub/ApDbResolverService.ts
@@ -99,13 +99,15 @@ export class ApDbResolverService implements OnApplicationShutdown {
 		if (parsed.local) {
 			if (parsed.type !== 'users') return null;
 
-			return await this.cacheService.userByIdCache.fetchMaybe(parsed.id, () => this.usersRepository.findOneBy({
-				id: parsed.id,
-			}).then(x => x ?? undefined)) as LocalUser | undefined ?? null;
+			return await this.cacheService.userByIdCache.fetchMaybe(
+				parsed.id,
+				() => this.usersRepository.findOneBy({ id: parsed.id }).then(x => x ?? undefined),
+			) as LocalUser | undefined ?? null;
 		} else {
-			return await this.cacheService.uriPersonCache.fetch(parsed.uri, () => this.usersRepository.findOneBy({
-				uri: parsed.uri,
-			})) as RemoteUser | null;
+			return await this.cacheService.uriPersonCache.fetch(
+				parsed.uri,
+				() => this.usersRepository.findOneBy({ uri: parsed.uri }),
+			) as RemoteUser | null;
 		}
 	}
 
@@ -145,9 +147,11 @@ export class ApDbResolverService implements OnApplicationShutdown {
 	} | null> {
 		const user = await this.apPersonService.resolvePerson(uri) as RemoteUser;
 
-		if (user == null) return null;
-
-		const key = await this.publicKeyByUserIdCache.fetch(user.id, () => this.userPublickeysRepository.findOneBy({ userId: user.id }), v => v != null);
+		const key = await this.publicKeyByUserIdCache.fetch(
+			user.id,
+			() => this.userPublickeysRepository.findOneBy({ userId: user.id }),
+			v => v != null,
+		);
 
 		return {
 			user,
diff --git a/packages/backend/src/core/activitypub/ApDeliverManagerService.ts b/packages/backend/src/core/activitypub/ApDeliverManagerService.ts
index 82c2c9f71f..ae1e42bf53 100644
--- a/packages/backend/src/core/activitypub/ApDeliverManagerService.ts
+++ b/packages/backend/src/core/activitypub/ApDeliverManagerService.ts
@@ -52,7 +52,7 @@ export class ApDeliverManagerService {
 	 * @param activity Activity
 	 */
 	@bindThis
-	public async deliverToFollowers(actor: { id: LocalUser['id']; host: null; }, activity: IActivity) {
+	public async deliverToFollowers(actor: { id: LocalUser['id']; host: null; }, activity: IActivity): Promise<void> {
 		const manager = new DeliverManager(
 			this.userEntityService,
 			this.followingsRepository,
@@ -71,7 +71,7 @@ export class ApDeliverManagerService {
 	 * @param to Target user
 	 */
 	@bindThis
-	public async deliverToUser(actor: { id: LocalUser['id']; host: null; }, activity: IActivity, to: RemoteUser) {
+	public async deliverToUser(actor: { id: LocalUser['id']; host: null; }, activity: IActivity, to: RemoteUser): Promise<void> {
 		const manager = new DeliverManager(
 			this.userEntityService,
 			this.followingsRepository,
@@ -84,7 +84,7 @@ export class ApDeliverManagerService {
 	}
 
 	@bindThis
-	public createDeliverManager(actor: { id: User['id']; host: null; }, activity: IActivity | null) {
+	public createDeliverManager(actor: { id: User['id']; host: null; }, activity: IActivity | null): DeliverManager {
 		return new DeliverManager(
 			this.userEntityService,
 			this.followingsRepository,
@@ -118,6 +118,7 @@ class DeliverManager {
 		activity: IActivity | null,
 	) {
 		// 型で弾いてはいるが一応ローカルユーザーかチェック
+		// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
 		if (actor.host != null) throw new Error('actor.host must be null');
 
 		// パフォーマンス向上のためキューに突っ込むのはidのみに絞る
@@ -131,10 +132,10 @@ class DeliverManager {
 	 * Add recipe for followers deliver
 	 */
 	@bindThis
-	public addFollowersRecipe() {
-		const deliver = {
+	public addFollowersRecipe(): void {
+		const deliver: IFollowersRecipe = {
 			type: 'Followers',
-		} as IFollowersRecipe;
+		};
 
 		this.addRecipe(deliver);
 	}
@@ -144,11 +145,11 @@ class DeliverManager {
 	 * @param to To
 	 */
 	@bindThis
-	public addDirectRecipe(to: RemoteUser) {
-		const recipe = {
+	public addDirectRecipe(to: RemoteUser): void {
+		const recipe: IDirectRecipe = {
 			type: 'Direct',
 			to,
-		} as IDirectRecipe;
+		};
 
 		this.addRecipe(recipe);
 	}
@@ -158,7 +159,7 @@ class DeliverManager {
 	 * @param recipe Recipe
 	 */
 	@bindThis
-	public addRecipe(recipe: IRecipe) {
+	public addRecipe(recipe: IRecipe): void {
 		this.recipes.push(recipe);
 	}
 
@@ -166,17 +167,13 @@ class DeliverManager {
 	 * Execute delivers
 	 */
 	@bindThis
-	public async execute() {
+	public async execute(): Promise<void> {
 		// The value flags whether it is shared or not.
 		// key: inbox URL, value: whether it is sharedInbox
 		const inboxes = new Map<string, boolean>();
 
-		/*
-		build inbox list
-
-		Process follower recipes first to avoid duplication when processing
-		direct recipes later.
-		*/
+		// build inbox list
+		// Process follower recipes first to avoid duplication when processing direct recipes later.
 		if (this.recipes.some(r => isFollowers(r))) {
 			// followers deliver
 			// TODO: SELECT DISTINCT ON ("followerSharedInbox") "followerSharedInbox" みたいな問い合わせにすればよりパフォーマンス向上できそう
@@ -190,26 +187,24 @@ class DeliverManager {
 					followerSharedInbox: true,
 					followerInbox: true,
 				},
-			}) as {
-				followerSharedInbox: string | null;
-				followerInbox: string;
-			}[];
+			});
 
 			for (const following of followers) {
 				const inbox = following.followerSharedInbox ?? following.followerInbox;
+				if (inbox === null) throw new Error('inbox is null');
 				inboxes.set(inbox, following.followerSharedInbox != null);
 			}
 		}
 
-		this.recipes.filter((recipe): recipe is IDirectRecipe =>
-			// followers recipes have already been processed
-			isDirect(recipe)
+		for (const recipe of this.recipes.filter(isDirect)) {
 			// check that shared inbox has not been added yet
-			&& !(recipe.to.sharedInbox && inboxes.has(recipe.to.sharedInbox))
+			if (recipe.to.sharedInbox !== null && inboxes.has(recipe.to.sharedInbox)) continue;
+
 			// check that they actually have an inbox
-			&& recipe.to.inbox != null,
-		)
-			.forEach(recipe => inboxes.set(recipe.to.inbox!, false));
+			if (recipe.to.inbox === null) continue;
+
+			inboxes.set(recipe.to.inbox, false);
+		}
 
 		// deliver
 		this.queueService.deliverMany(this.actor, this.activity, inboxes);
diff --git a/packages/backend/src/core/activitypub/ApInboxService.ts b/packages/backend/src/core/activitypub/ApInboxService.ts
index efef777fb0..8d5f4883e4 100644
--- a/packages/backend/src/core/activitypub/ApInboxService.ts
+++ b/packages/backend/src/core/activitypub/ApInboxService.ts
@@ -21,10 +21,10 @@ import { CacheService } from '@/core/CacheService.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { QueueService } from '@/core/QueueService.js';
-import type { UsersRepository, NotesRepository, FollowingsRepository, AbuseUserReportsRepository, FollowRequestsRepository, } from '@/models/index.js';
+import type { UsersRepository, NotesRepository, FollowingsRepository, AbuseUserReportsRepository, FollowRequestsRepository } from '@/models/index.js';
 import { bindThis } from '@/decorators.js';
 import type { RemoteUser } from '@/models/entities/User.js';
-import { getApHrefNullable, getApId, getApIds, getApType, getOneApHrefNullable, isAccept, isActor, isAdd, isAnnounce, isBlock, isCollection, isCollectionOrOrderedCollection, isCreate, isDelete, isFlag, isFollow, isLike, isMove, isPost, isReject, isRemove, isTombstone, isUndo, isUpdate, validActor, validPost } from './type.js';
+import { getApHrefNullable, getApId, getApIds, getApType, isAccept, isActor, isAdd, isAnnounce, isBlock, isCollection, isCollectionOrOrderedCollection, isCreate, isDelete, isFlag, isFollow, isLike, isMove, isPost, isReject, isRemove, isTombstone, isUndo, isUpdate, validActor, validPost } from './type.js';
 import { ApNoteService } from './models/ApNoteService.js';
 import { ApLoggerService } from './ApLoggerService.js';
 import { ApDbResolverService } from './ApDbResolverService.js';
@@ -86,7 +86,7 @@ export class ApInboxService {
 	}
 
 	@bindThis
-	public async performActivity(actor: RemoteUser, activity: IObject) {
+	public async performActivity(actor: RemoteUser, activity: IObject): Promise<void> {
 		if (isCollectionOrOrderedCollection(activity)) {
 			const resolver = this.apResolverService.createResolver();
 			for (const item of toArray(isCollection(activity) ? activity.items : activity.orderedItems)) {
@@ -107,7 +107,7 @@ export class ApInboxService {
 		if (actor.uri) {
 			if (actor.lastFetchedAt == null || Date.now() - actor.lastFetchedAt.getTime() > 1000 * 60 * 60 * 24) {
 				setImmediate(() => {
-					this.apPersonService.updatePerson(actor.uri!);
+					this.apPersonService.updatePerson(actor.uri);
 				});
 			}
 		}
@@ -229,7 +229,7 @@ export class ApInboxService {
 
 	@bindThis
 	private async add(actor: RemoteUser, activity: IAdd): Promise<void> {
-		if ('actor' in activity && actor.uri !== activity.actor) {
+		if (actor.uri !== activity.actor) {
 			throw new Error('invalid actor');
 		}
 
@@ -273,7 +273,7 @@ export class ApInboxService {
 		const unlock = await this.appLockService.getApLock(uri);
 
 		try {
-		// 既に同じURIを持つものが登録されていないかチェック
+			// 既に同じURIを持つものが登録されていないかチェック
 			const exist = await this.apNoteService.fetchNote(uri);
 			if (exist) {
 				return;
@@ -292,7 +292,7 @@ export class ApInboxService {
 						return;
 					}
 
-					this.logger.warn(`Error in announce target ${targetUri} - ${err.statusCode ?? err}`);
+					this.logger.warn(`Error in announce target ${targetUri} - ${err.statusCode}`);
 				}
 				throw err;
 			}
@@ -409,7 +409,7 @@ export class ApInboxService {
 
 	@bindThis
 	private async delete(actor: RemoteUser, activity: IDelete): Promise<string> {
-		if ('actor' in activity && actor.uri !== activity.actor) {
+		if (actor.uri !== activity.actor) {
 			throw new Error('invalid actor');
 		}
 
@@ -420,7 +420,7 @@ export class ApInboxService {
 			// typeが不明だけど、どうせ消えてるのでremote resolveしない
 			formerType = undefined;
 		} else {
-			const object = activity.object as IObject;
+			const object = activity.object;
 			if (isTombstone(object)) {
 				formerType = toSingle(object.formerType);
 			} else {
@@ -503,7 +503,10 @@ export class ApInboxService {
 		// 対象ユーザーは一番最初のユーザー として あとはコメントとして格納する
 		const uris = getApIds(activity.object);
 
-		const userIds = uris.filter(uri => uri.startsWith(this.config.url + '/users/')).map(uri => uri.split('/').pop()!);
+		const userIds = uris
+			.filter(uri => uri.startsWith(this.config.url + '/users/'))
+			.map(uri => uri.split('/').at(-1))
+			.filter((userId): userId is string => userId !== undefined);
 		const users = await this.usersRepository.findBy({
 			id: In(userIds),
 		});
@@ -566,7 +569,7 @@ export class ApInboxService {
 
 	@bindThis
 	private async remove(actor: RemoteUser, activity: IRemove): Promise<void> {
-		if ('actor' in activity && actor.uri !== activity.actor) {
+		if (actor.uri !== activity.actor) {
 			throw new Error('invalid actor');
 		}
 
@@ -586,7 +589,7 @@ export class ApInboxService {
 
 	@bindThis
 	private async undo(actor: RemoteUser, activity: IUndo): Promise<string> {
-		if ('actor' in activity && actor.uri !== activity.actor) {
+		if (actor.uri !== activity.actor) {
 			throw new Error('invalid actor');
 		}
 
@@ -618,12 +621,14 @@ export class ApInboxService {
 			return 'skip: follower not found';
 		}
 
-		const following = await this.followingsRepository.findOneBy({
-			followerId: follower.id,
-			followeeId: actor.id,
+		const isFollowing = await this.followingsRepository.exist({
+			where: {
+				followerId: follower.id,
+				followeeId: actor.id,
+			},
 		});
 
-		if (following) {
+		if (isFollowing) {
 			await this.userFollowingService.unfollow(follower, actor);
 			return 'ok: unfollowed';
 		}
@@ -673,22 +678,26 @@ export class ApInboxService {
 			return 'skip: フォロー解除しようとしているユーザーはローカルユーザーではありません';
 		}
 
-		const req = await this.followRequestsRepository.findOneBy({
-			followerId: actor.id,
-			followeeId: followee.id,
+		const requestExist = await this.followRequestsRepository.exist({
+			where: {
+				followerId: actor.id,
+				followeeId: followee.id,
+			},
 		});
 
-		const following = await this.followingsRepository.findOneBy({
-			followerId: actor.id,
-			followeeId: followee.id,
+		const isFollowing = await this.followingsRepository.exist({
+			where: {
+				followerId: actor.id,
+				followeeId: followee.id,
+			},
 		});
 
-		if (req) {
+		if (requestExist) {
 			await this.userFollowingService.cancelFollowRequest(followee, actor);
 			return 'ok: follow request canceled';
 		}
 
-		if (following) {
+		if (isFollowing) {
 			await this.userFollowingService.unfollow(actor, followee);
 			return 'ok: unfollowed';
 		}
@@ -713,7 +722,7 @@ export class ApInboxService {
 
 	@bindThis
 	private async update(actor: RemoteUser, activity: IUpdate): Promise<string> {
-		if ('actor' in activity && actor.uri !== activity.actor) {
+		if (actor.uri !== activity.actor) {
 			return 'skip: invalid actor';
 		}
 
@@ -727,7 +736,7 @@ export class ApInboxService {
 		});
 
 		if (isActor(object)) {
-			await this.apPersonService.updatePerson(actor.uri!, resolver, object);
+			await this.apPersonService.updatePerson(actor.uri, resolver, object);
 			return 'ok: Person updated';
 		} else if (getApType(object) === 'Question') {
 			await this.apQuestionService.updateQuestion(object, resolver).catch(err => console.error(err));
diff --git a/packages/backend/src/core/activitypub/ApMfmService.ts b/packages/backend/src/core/activitypub/ApMfmService.ts
index 411cf17d19..d7269eca92 100644
--- a/packages/backend/src/core/activitypub/ApMfmService.ts
+++ b/packages/backend/src/core/activitypub/ApMfmService.ts
@@ -4,9 +4,9 @@ import { DI } from '@/di-symbols.js';
 import type { Config } from '@/config.js';
 import { MfmService } from '@/core/MfmService.js';
 import type { Note } from '@/models/entities/Note.js';
+import { bindThis } from '@/decorators.js';
 import { extractApHashtagObjects } from './models/tag.js';
 import type { IObject } from './type.js';
-import { bindThis } from '@/decorators.js';
 
 @Injectable()
 export class ApMfmService {
@@ -19,14 +19,13 @@ export class ApMfmService {
 	}
 
 	@bindThis
-	public htmlToMfm(html: string, tag?: IObject | IObject[]) {
-		const hashtagNames = extractApHashtagObjects(tag).map(x => x.name).filter((x): x is string => x != null);
-
+	public htmlToMfm(html: string, tag?: IObject | IObject[]): string {
+		const hashtagNames = extractApHashtagObjects(tag).map(x => x.name);
 		return this.mfmService.fromHtml(html, hashtagNames);
 	}
 
 	@bindThis
-	public getNoteHtml(note: Note) {
+	public getNoteHtml(note: Note): string | null {
 		if (!note.text) return '';
 		return this.mfmService.toHtml(mfm.parse(note.text), JSON.parse(note.mentionedRemoteUsers));
 	}
diff --git a/packages/backend/src/core/activitypub/ApRendererService.ts b/packages/backend/src/core/activitypub/ApRendererService.ts
index d8b95ca4d1..95e3a936d2 100644
--- a/packages/backend/src/core/activitypub/ApRendererService.ts
+++ b/packages/backend/src/core/activitypub/ApRendererService.ts
@@ -1,6 +1,6 @@
 import { createPublicKey } from 'node:crypto';
 import { Inject, Injectable } from '@nestjs/common';
-import { In, IsNull } from 'typeorm';
+import { In } from 'typeorm';
 import { v4 as uuid } from 'uuid';
 import * as mfm from 'mfm-js';
 import { DI } from '@/di-symbols.js';
@@ -26,7 +26,6 @@ import { isNotNull } from '@/misc/is-not-null.js';
 import { LdSignatureService } from './LdSignatureService.js';
 import { ApMfmService } from './ApMfmService.js';
 import type { IAccept, IActivity, IAdd, IAnnounce, IApDocument, IApEmoji, IApHashtag, IApImage, IApMention, IBlock, ICreate, IDelete, IFlag, IFollow, IKey, ILike, IMove, IObject, IPost, IQuestion, IReject, IRemove, ITombstone, IUndo, IUpdate } from './type.js';
-import type { IIdentifier } from './models/identifier.js';
 
 @Injectable()
 export class ApRendererService {
@@ -63,7 +62,7 @@ export class ApRendererService {
 	}
 
 	@bindThis
-	public renderAccept(object: any, user: { id: User['id']; host: null }): IAccept {
+	public renderAccept(object: string | IObject, user: { id: User['id']; host: null }): IAccept {
 		return {
 			type: 'Accept',
 			actor: this.userEntityService.genLocalUserUri(user.id),
@@ -72,7 +71,7 @@ export class ApRendererService {
 	}
 
 	@bindThis
-	public renderAdd(user: LocalUser, target: any, object: any): IAdd {
+	public renderAdd(user: LocalUser, target: string | IObject | undefined, object: string | IObject): IAdd {
 		return {
 			type: 'Add',
 			actor: this.userEntityService.genLocalUserUri(user.id),
@@ -82,7 +81,7 @@ export class ApRendererService {
 	}
 
 	@bindThis
-	public renderAnnounce(object: any, note: Note): IAnnounce {
+	public renderAnnounce(object: string | IObject, note: Note): IAnnounce {
 		const attributedTo = this.userEntityService.genLocalUserUri(note.userId);
 
 		let to: string[] = [];
@@ -133,13 +132,13 @@ export class ApRendererService {
 
 	@bindThis
 	public renderCreate(object: IObject, note: Note): ICreate {
-		const activity = {
+		const activity: ICreate = {
 			id: `${this.config.url}/notes/${note.id}/activity`,
 			actor: this.userEntityService.genLocalUserUri(note.userId),
 			type: 'Create',
 			published: note.createdAt.toISOString(),
 			object,
-		} as ICreate;
+		};
 
 		if (object.to) activity.to = object.to;
 		if (object.cc) activity.cc = object.cc;
@@ -209,7 +208,7 @@ export class ApRendererService {
 	 * @param id Follower|Followee ID
 	 */
 	@bindThis
-	public async renderFollowUser(id: User['id']) {
+	public async renderFollowUser(id: User['id']): Promise<string> {
 		const user = await this.usersRepository.findOneByOrFail({ id: id }) as PartialLocalUser | PartialRemoteUser;
 		return this.userEntityService.getUserUri(user);
 	}
@@ -223,8 +222,8 @@ export class ApRendererService {
 		return {
 			id: requestId ?? `${this.config.url}/follows/${follower.id}/${followee.id}`,
 			type: 'Follow',
-			actor: this.userEntityService.getUserUri(follower)!,
-			object: this.userEntityService.getUserUri(followee)!,
+			actor: this.userEntityService.getUserUri(follower),
+			object: this.userEntityService.getUserUri(followee),
 		};
 	}
 
@@ -264,14 +263,14 @@ export class ApRendererService {
 	public async renderLike(noteReaction: NoteReaction, note: { uri: string | null }): Promise<ILike> {
 		const reaction = noteReaction.reaction;
 
-		const object = {
+		const object: ILike = {
 			type: 'Like',
 			id: `${this.config.url}/likes/${noteReaction.id}`,
 			actor: `${this.config.url}/users/${noteReaction.userId}`,
 			object: note.uri ? note.uri : `${this.config.url}/notes/${noteReaction.noteId}`,
 			content: reaction,
 			_misskey_reaction: reaction,
-		} as ILike;
+		};
 
 		if (reaction.startsWith(':')) {
 			const name = reaction.replaceAll(':', '');
@@ -287,7 +286,7 @@ export class ApRendererService {
 	public renderMention(mention: PartialLocalUser | PartialRemoteUser): IApMention {
 		return {
 			type: 'Mention',
-			href: this.userEntityService.getUserUri(mention)!,
+			href: this.userEntityService.getUserUri(mention),
 			name: this.userEntityService.isRemoteUser(mention) ? `@${mention.username}@${mention.host}` : `@${(mention as LocalUser).username}`,
 		};
 	}
@@ -297,8 +296,8 @@ export class ApRendererService {
 		src: PartialLocalUser | PartialRemoteUser,
 		dst: PartialLocalUser | PartialRemoteUser,
 	): IMove {
-		const actor = this.userEntityService.getUserUri(src)!;
-		const target = this.userEntityService.getUserUri(dst)!;
+		const actor = this.userEntityService.getUserUri(src);
+		const target = this.userEntityService.getUserUri(dst);
 		return {
 			id: `${this.config.url}/moves/${src.id}/${dst.id}`,
 			actor,
@@ -310,10 +309,10 @@ export class ApRendererService {
 
 	@bindThis
 	public async renderNote(note: Note, dive = true): Promise<IPost> {
-		const getPromisedFiles = async (ids: string[]) => {
-			if (!ids || ids.length === 0) return [];
+		const getPromisedFiles = async (ids: string[]): Promise<DriveFile[]> => {
+			if (ids.length === 0) return [];
 			const items = await this.driveFilesRepository.findBy({ id: In(ids) });
-			return ids.map(id => items.find(item => item.id === id)).filter(item => item != null) as DriveFile[];
+			return ids.map(id => items.find(item => item.id === id)).filter((item): item is DriveFile => item != null);
 		};
 
 		let inReplyTo;
@@ -323,9 +322,9 @@ export class ApRendererService {
 			inReplyToNote = await this.notesRepository.findOneBy({ id: note.replyId });
 
 			if (inReplyToNote != null) {
-				const inReplyToUser = await this.usersRepository.findOneBy({ id: inReplyToNote.userId });
+				const inReplyToUserExist = await this.usersRepository.exist({ where: { id: inReplyToNote.userId } });
 
-				if (inReplyToUser != null) {
+				if (inReplyToUserExist) {
 					if (inReplyToNote.uri) {
 						inReplyTo = inReplyToNote.uri;
 					} else {
@@ -375,7 +374,7 @@ export class ApRendererService {
 			id: In(note.mentions),
 		}) : [];
 
-		const hashtagTags = (note.tags ?? []).map(tag => this.renderHashtag(tag));
+		const hashtagTags = note.tags.map(tag => this.renderHashtag(tag));
 		const mentionTags = mentionedUsers.map(u => this.renderMention(u as LocalUser | RemoteUser));
 
 		const files = await getPromisedFiles(note.fileIds);
@@ -451,37 +450,26 @@ export class ApRendererService {
 	@bindThis
 	public async renderPerson(user: LocalUser) {
 		const id = this.userEntityService.genLocalUserUri(user.id);
-		const isSystem = !!user.username.match(/\./);
+		const isSystem = user.username.includes('.');
 
 		const [avatar, banner, profile] = await Promise.all([
-			user.avatarId ? this.driveFilesRepository.findOneBy({ id: user.avatarId }) : Promise.resolve(undefined),
-			user.bannerId ? this.driveFilesRepository.findOneBy({ id: user.bannerId }) : Promise.resolve(undefined),
+			user.avatarId ? this.driveFilesRepository.findOneBy({ id: user.avatarId }) : undefined,
+			user.bannerId ? this.driveFilesRepository.findOneBy({ id: user.bannerId }) : undefined,
 			this.userProfilesRepository.findOneByOrFail({ userId: user.id }),
 		]);
 
-		const attachment: {
+		const attachment = profile.fields.map(field => ({
 			type: 'PropertyValue',
-			name: string,
-			value: string,
-			identifier?: IIdentifier,
-		}[] = [];
-
-		if (profile.fields) {
-			for (const field of profile.fields) {
-				attachment.push({
-					type: 'PropertyValue',
-					name: field.name,
-					value: (field.value != null && field.value.match(/^https?:/))
-						? `<a href="${new URL(field.value).href}" rel="me nofollow noopener" target="_blank">${new URL(field.value).href}</a>`
-						: field.value,
-				});
-			}
-		}
+			name: field.name,
+			value: /^https?:/.test(field.value)
+				? `<a href="${new URL(field.value).href}" rel="me nofollow noopener" target="_blank">${new URL(field.value).href}</a>`
+				: field.value,
+		}));
 
 		const emojis = await this.getEmojis(user.emojis);
 		const apemojis = emojis.filter(emoji => !emoji.localOnly).map(emoji => this.renderEmoji(emoji));
 
-		const hashtagTags = (user.tags ?? []).map(tag => this.renderHashtag(tag));
+		const hashtagTags = user.tags.map(tag => this.renderHashtag(tag));
 
 		const tag = [
 			...apemojis,
@@ -490,7 +478,7 @@ export class ApRendererService {
 
 		const keypair = await this.userKeypairService.getUserKeypair(user.id);
 
-		const person = {
+		const person: any = {
 			type: isSystem ? 'Application' : user.isBot ? 'Service' : 'Person',
 			id,
 			inbox: `${id}/inbox`,
@@ -508,11 +496,11 @@ export class ApRendererService {
 			image: banner ? this.renderImage(banner) : null,
 			tag,
 			manuallyApprovesFollowers: user.isLocked,
-			discoverable: !!user.isExplorable,
+			discoverable: user.isExplorable,
 			publicKey: this.renderKey(user, keypair, '#main-key'),
 			isCat: user.isCat,
 			attachment: attachment.length ? attachment : undefined,
-		} as any;
+		};
 
 		if (user.movedToUri) {
 			person.movedTo = user.movedToUri;
@@ -552,7 +540,7 @@ export class ApRendererService {
 	}
 
 	@bindThis
-	public renderReject(object: any, user: { id: User['id'] }): IReject {
+	public renderReject(object: string | IObject, user: { id: User['id'] }): IReject {
 		return {
 			type: 'Reject',
 			actor: this.userEntityService.genLocalUserUri(user.id),
@@ -561,7 +549,7 @@ export class ApRendererService {
 	}
 
 	@bindThis
-	public renderRemove(user: { id: User['id'] }, target: any, object: any): IRemove {
+	public renderRemove(user: { id: User['id'] }, target: string | IObject | undefined, object: string | IObject): IRemove {
 		return {
 			type: 'Remove',
 			actor: this.userEntityService.genLocalUserUri(user.id),
@@ -579,8 +567,8 @@ export class ApRendererService {
 	}
 
 	@bindThis
-	public renderUndo(object: any, user: { id: User['id'] }): IUndo {
-		const id = typeof object.id === 'string' && object.id.startsWith(this.config.url) ? `${object.id}/undo` : undefined;
+	public renderUndo(object: string | IObject, user: { id: User['id'] }): IUndo {
+		const id = typeof object !== 'string' && typeof object.id === 'string' && object.id.startsWith(this.config.url) ? `${object.id}/undo` : undefined;
 
 		return {
 			type: 'Undo',
@@ -592,7 +580,7 @@ export class ApRendererService {
 	}
 
 	@bindThis
-	public renderUpdate(object: any, user: { id: User['id'] }): IUpdate {
+	public renderUpdate(object: string | IObject, user: { id: User['id'] }): IUpdate {
 		return {
 			id: `${this.config.url}/users/${user.id}#updates/${new Date().getTime()}`,
 			actor: this.userEntityService.genLocalUserUri(user.id),
@@ -658,7 +646,7 @@ export class ApRendererService {
 					vcard: 'http://www.w3.org/2006/vcard/ns#',
 				},
 			],
-		}, x as T & { id: string; });
+		}, x as T & { id: string });
 	}
 
 	@bindThis
@@ -683,13 +671,13 @@ export class ApRendererService {
 	 */
 	@bindThis
 	public renderOrderedCollectionPage(id: string, totalItems: any, orderedItems: any, partOf: string, prev?: string, next?: string) {
-		const page = {
+		const page: any = {
 			id,
 			partOf,
 			type: 'OrderedCollectionPage',
 			totalItems,
 			orderedItems,
-		} as any;
+		};
 
 		if (prev) page.prev = prev;
 		if (next) page.next = next;
@@ -706,7 +694,7 @@ export class ApRendererService {
 	 * @param orderedItems attached objects (optional)
 	 */
 	@bindThis
-	public renderOrderedCollection(id: string | null, totalItems: any, first?: string, last?: string, orderedItems?: IObject[]) {
+	public renderOrderedCollection(id: string, totalItems: number, first?: string, last?: string, orderedItems?: IObject[]) {
 		const page: any = {
 			id,
 			type: 'OrderedCollection',
@@ -722,7 +710,7 @@ export class ApRendererService {
 
 	@bindThis
 	private async getEmojis(names: string[]): Promise<Emoji[]> {
-		if (names == null || names.length === 0) return [];
+		if (names.length === 0) return [];
 
 		const allEmojis = await this.customEmojiService.localEmojisCache.fetch();
 		const emojis = names.map(name => allEmojis.get(name)).filter(isNotNull);
diff --git a/packages/backend/src/core/activitypub/ApRequestService.ts b/packages/backend/src/core/activitypub/ApRequestService.ts
index 5005612ab8..44676cac20 100644
--- a/packages/backend/src/core/activitypub/ApRequestService.ts
+++ b/packages/backend/src/core/activitypub/ApRequestService.ts
@@ -140,7 +140,7 @@ export class ApRequestService {
 	}
 
 	@bindThis
-	public async signedPost(user: { id: User['id'] }, url: string, object: any) {
+	public async signedPost(user: { id: User['id'] }, url: string, object: unknown): Promise<void> {
 		const body = JSON.stringify(object);
 
 		const keypair = await this.userKeypairService.getUserKeypair(user.id);
@@ -169,7 +169,7 @@ export class ApRequestService {
 	 * @param url URL to fetch
 	 */
 	@bindThis
-	public async signedGet(url: string, user: { id: User['id'] }) {
+	public async signedGet(url: string, user: { id: User['id'] }): Promise<unknown> {
 		const keypair = await this.userKeypairService.getUserKeypair(user.id);
 
 		const req = ApRequestCreator.createSignedGet({
diff --git a/packages/backend/src/core/activitypub/ApResolverService.ts b/packages/backend/src/core/activitypub/ApResolverService.ts
index d3e0345c9c..aa4720c56e 100644
--- a/packages/backend/src/core/activitypub/ApResolverService.ts
+++ b/packages/backend/src/core/activitypub/ApResolverService.ts
@@ -61,10 +61,6 @@ export class Resolver {
 
 	@bindThis
 	public async resolve(value: string | IObject): Promise<IObject> {
-		if (value == null) {
-			throw new Error('resolvee is null (or undefined)');
-		}
-
 		if (typeof value !== 'string') {
 			return value;
 		}
@@ -104,11 +100,11 @@ export class Resolver {
 			? await this.apRequestService.signedGet(value, this.user) as IObject
 			: await this.httpRequestService.getJson(value, 'application/activity+json, application/ld+json')) as IObject;
 
-		if (object == null || (
+		if (
 			Array.isArray(object['@context']) ?
 				!(object['@context'] as unknown[]).includes('https://www.w3.org/ns/activitystreams') :
 				object['@context'] !== 'https://www.w3.org/ns/activitystreams'
-		)) {
+		) {
 			throw new Error('invalid response');
 		}
 
diff --git a/packages/backend/src/core/activitypub/LdSignatureService.ts b/packages/backend/src/core/activitypub/LdSignatureService.ts
index 20fe2a0a77..af7e243229 100644
--- a/packages/backend/src/core/activitypub/LdSignatureService.ts
+++ b/packages/backend/src/core/activitypub/LdSignatureService.ts
@@ -3,6 +3,8 @@ import { Injectable } from '@nestjs/common';
 import { HttpRequestService } from '@/core/HttpRequestService.js';
 import { bindThis } from '@/decorators.js';
 import { CONTEXTS } from './misc/contexts.js';
+import type { JsonLdDocument } from 'jsonld';
+import type { JsonLd, RemoteDocument } from 'jsonld/jsonld-spec.js';
 
 // RsaSignature2017 based from https://github.com/transmute-industries/RsaSignature2017
 
@@ -18,22 +20,21 @@ class LdSignature {
 
 	@bindThis
 	public async signRsaSignature2017(data: any, privateKey: string, creator: string, domain?: string, created?: Date): Promise<any> {
-		const options = {
-			type: 'RsaSignature2017',
-			creator,
-			domain,
-			nonce: crypto.randomBytes(16).toString('hex'),
-			created: (created ?? new Date()).toISOString(),
-		} as {
+		const options: {
 			type: string;
 			creator: string;
 			domain?: string;
 			nonce: string;
 			created: string;
+		} = {
+			type: 'RsaSignature2017',
+			creator,
+			nonce: crypto.randomBytes(16).toString('hex'),
+			created: (created ?? new Date()).toISOString(),
 		};
 
-		if (!domain) {
-			delete options.domain;
+		if (domain) {
+			options.domain = domain;
 		}
 
 		const toBeSigned = await this.createVerifyData(data, options);
@@ -62,7 +63,7 @@ class LdSignature {
 	}
 
 	@bindThis
-	public async createVerifyData(data: any, options: any) {
+	public async createVerifyData(data: any, options: any): Promise<string> {
 		const transformedOptions = {
 			...options,
 			'@context': 'https://w3id.org/identity/v1',
@@ -82,7 +83,7 @@ class LdSignature {
 	}
 
 	@bindThis
-	public async normalize(data: any) {
+	public async normalize(data: JsonLdDocument): Promise<string> {
 		const customLoader = this.getLoader();
 		// XXX: Importing jsonld dynamically since Jest frequently fails to import it statically
 		// https://github.com/misskey-dev/misskey/pull/9894#discussion_r1103753595
@@ -93,14 +94,14 @@ class LdSignature {
 
 	@bindThis
 	private getLoader() {
-		return async (url: string): Promise<any> => {
-			if (!url.match('^https?\:\/\/')) throw new Error(`Invalid URL ${url}`);
+		return async (url: string): Promise<RemoteDocument> => {
+			if (!/^https?:\/\//.test(url)) throw new Error(`Invalid URL ${url}`);
 
 			if (this.preLoad) {
 				if (url in CONTEXTS) {
 					if (this.debug) console.debug(`HIT: ${url}`);
 					return {
-						contextUrl: null,
+						contextUrl: undefined,
 						document: CONTEXTS[url],
 						documentUrl: url,
 					};
@@ -110,7 +111,7 @@ class LdSignature {
 			if (this.debug) console.debug(`MISS: ${url}`);
 			const document = await this.fetchDocument(url);
 			return {
-				contextUrl: null,
+				contextUrl: undefined,
 				document: document,
 				documentUrl: url,
 			};
@@ -118,13 +119,17 @@ class LdSignature {
 	}
 
 	@bindThis
-	private async fetchDocument(url: string) {
-		const json = await this.httpRequestService.send(url, {
-			headers: {
-				Accept: 'application/ld+json, application/json',
+	private async fetchDocument(url: string): Promise<JsonLd> {
+		const json = await this.httpRequestService.send(
+			url,
+			{
+				headers: {
+					Accept: 'application/ld+json, application/json',
+				},
+				timeout: this.loderTimeout,
 			},
-			timeout: this.loderTimeout,
-		}, { throwErrorWhenResponseNotOk: false }).then(res => {
+			{ throwErrorWhenResponseNotOk: false },
+		).then(res => {
 			if (!res.ok) {
 				throw new Error(`${res.status} ${res.statusText}`);
 			} else {
@@ -132,7 +137,7 @@ class LdSignature {
 			}
 		});
 
-		return json;
+		return json as JsonLd;
 	}
 
 	@bindThis
diff --git a/packages/backend/src/core/activitypub/misc/contexts.ts b/packages/backend/src/core/activitypub/misc/contexts.ts
index aee0d3629c..2bcd3811b2 100644
--- a/packages/backend/src/core/activitypub/misc/contexts.ts
+++ b/packages/backend/src/core/activitypub/misc/contexts.ts
@@ -1,3 +1,5 @@
+import type { JsonLd } from 'jsonld/jsonld-spec.js';
+
 /* eslint:disable:quotemark indent */
 const id_v1 = {
 	'@context': {
@@ -86,7 +88,7 @@ const id_v1 = {
 		'accessControl': { '@id': 'perm:accessControl', '@type': '@id' },
 		'writePermission': { '@id': 'perm:writePermission', '@type': '@id' },
 	},
-};
+} satisfies JsonLd;
 
 const security_v1 = {
 	'@context': {
@@ -137,7 +139,7 @@ const security_v1 = {
 		'signatureAlgorithm': 'sec:signingAlgorithm',
 		'signatureValue': 'sec:signatureValue',
 	},
-};
+} satisfies JsonLd;
 
 const activitystreams = {
 	'@context': {
@@ -517,9 +519,9 @@ const activitystreams = {
 			'@type': '@id',
 		},
 	},
-};
+} satisfies JsonLd;
 
-export const CONTEXTS: Record<string, unknown> = {
+export const CONTEXTS: Record<string, JsonLd> = {
 	'https://w3id.org/identity/v1': id_v1,
 	'https://w3id.org/security/v1': security_v1,
 	'https://www.w3.org/ns/activitystreams': activitystreams,
diff --git a/packages/backend/src/core/activitypub/models/ApNoteService.ts b/packages/backend/src/core/activitypub/models/ApNoteService.ts
index d3359ef900..46ed976a6b 100644
--- a/packages/backend/src/core/activitypub/models/ApNoteService.ts
+++ b/packages/backend/src/core/activitypub/models/ApNoteService.ts
@@ -200,7 +200,7 @@ export class ApNoteService {
 				| { status: 'ok'; res: Note }
 				| { status: 'permerror' | 'temperror' }
 			> => {
-				if (!uri.match(/^https?:/)) return { status: 'permerror' };
+				if (!/^https?:/.test(uri)) return { status: 'permerror' };
 				try {
 					const res = await this.resolveNote(uri);
 					if (res == null) return { status: 'permerror' };
diff --git a/packages/backend/src/core/activitypub/type.ts b/packages/backend/src/core/activitypub/type.ts
index 625135da6c..4bb0fa61ec 100644
--- a/packages/backend/src/core/activitypub/type.ts
+++ b/packages/backend/src/core/activitypub/type.ts
@@ -194,7 +194,6 @@ export interface IApPropertyValue extends IObject {
 }
 
 export const isPropertyValue = (object: IObject): object is IApPropertyValue =>
-	object &&
 	getApType(object) === 'PropertyValue' &&
 	typeof object.name === 'string' &&
 	'value' in object &&
diff --git a/packages/backend/src/core/entities/ChannelEntityService.ts b/packages/backend/src/core/entities/ChannelEntityService.ts
index 15ffd44861..d24657260f 100644
--- a/packages/backend/src/core/entities/ChannelEntityService.ts
+++ b/packages/backend/src/core/entities/ChannelEntityService.ts
@@ -47,17 +47,26 @@ export class ChannelEntityService {
 
 		const banner = channel.bannerId ? await this.driveFilesRepository.findOneBy({ id: channel.bannerId }) : null;
 
-		const hasUnreadNote = meId ? (await this.noteUnreadsRepository.findOneBy({ noteChannelId: channel.id, userId: meId })) != null : undefined;
+		const hasUnreadNote = meId ? await this.noteUnreadsRepository.exist({
+			where: {
+				noteChannelId: channel.id,
+				userId: meId
+			},
+		}) : undefined;
 
-		const following = meId ? await this.channelFollowingsRepository.findOneBy({
-			followerId: meId,
-			followeeId: channel.id,
-		}) : null;
+		const isFollowing = meId ? await this.channelFollowingsRepository.exist({
+			where: {
+				followerId: meId,
+				followeeId: channel.id,
+			},
+		}) : false;
 
-		const favorite = meId ? await this.channelFavoritesRepository.findOneBy({
-			userId: meId,
-			channelId: channel.id,
-		}) : null;
+		const isFavorited = meId ? await this.channelFavoritesRepository.exist({
+			where: {
+				userId: meId,
+				channelId: channel.id,
+			},
+		}) : false;
 
 		const pinnedNotes = channel.pinnedNoteIds.length > 0 ? await this.notesRepository.find({
 			where: {
@@ -80,8 +89,8 @@ export class ChannelEntityService {
 			notesCount: channel.notesCount,
 
 			...(me ? {
-				isFollowing: following != null,
-				isFavorited: favorite != null,
+				isFollowing,
+				isFavorited,
 				hasUnreadNote,
 			} : {}),
 
diff --git a/packages/backend/src/core/entities/ClipEntityService.ts b/packages/backend/src/core/entities/ClipEntityService.ts
index 33d3c53806..f558cbc33d 100644
--- a/packages/backend/src/core/entities/ClipEntityService.ts
+++ b/packages/backend/src/core/entities/ClipEntityService.ts
@@ -39,7 +39,7 @@ export class ClipEntityService {
 			description: clip.description,
 			isPublic: clip.isPublic,
 			favoritedCount: await this.clipFavoritesRepository.countBy({ clipId: clip.id }),
-			isFavorited: meId ? await this.clipFavoritesRepository.findOneBy({ clipId: clip.id, userId: meId }).then(x => x != null) : undefined,
+			isFavorited: meId ? await this.clipFavoritesRepository.exist({ where: { clipId: clip.id, userId: meId } }) : undefined,
 		});
 	}
 
diff --git a/packages/backend/src/core/entities/FlashEntityService.ts b/packages/backend/src/core/entities/FlashEntityService.ts
index e52a591884..92345457c9 100644
--- a/packages/backend/src/core/entities/FlashEntityService.ts
+++ b/packages/backend/src/core/entities/FlashEntityService.ts
@@ -40,7 +40,7 @@ export class FlashEntityService {
 			summary: flash.summary,
 			script: flash.script,
 			likedCount: flash.likedCount,
-			isLiked: meId ? await this.flashLikesRepository.findOneBy({ flashId: flash.id, userId: meId }).then(x => x != null) : undefined,
+			isLiked: meId ? await this.flashLikesRepository.exist({ where: { flashId: flash.id, userId: meId } }) : undefined,
 		});
 	}
 
diff --git a/packages/backend/src/core/entities/GalleryPostEntityService.ts b/packages/backend/src/core/entities/GalleryPostEntityService.ts
index 632c75304f..c44a5df118 100644
--- a/packages/backend/src/core/entities/GalleryPostEntityService.ts
+++ b/packages/backend/src/core/entities/GalleryPostEntityService.ts
@@ -46,7 +46,7 @@ export class GalleryPostEntityService {
 			tags: post.tags.length > 0 ? post.tags : undefined,
 			isSensitive: post.isSensitive,
 			likedCount: post.likedCount,
-			isLiked: meId ? await this.galleryLikesRepository.findOneBy({ postId: post.id, userId: meId }).then(x => x != null) : undefined,
+			isLiked: meId ? await this.galleryLikesRepository.exist({ where: { postId: post.id, userId: meId } }) : undefined,
 		});
 	}
 
diff --git a/packages/backend/src/core/entities/NoteEntityService.ts b/packages/backend/src/core/entities/NoteEntityService.ts
index e730c0eb8f..546e5f56d2 100644
--- a/packages/backend/src/core/entities/NoteEntityService.ts
+++ b/packages/backend/src/core/entities/NoteEntityService.ts
@@ -106,16 +106,14 @@ export class NoteEntityService implements OnModuleInit {
 				hide = false;
 			} else {
 			// フォロワーかどうか
-				const following = await this.followingsRepository.findOneBy({
-					followeeId: packedNote.userId,
-					followerId: meId,
+				const isFollowing = await this.followingsRepository.exist({
+					where: {
+						followeeId: packedNote.userId,
+						followerId: meId,
+					},
 				});
 
-				if (following == null) {
-					hide = true;
-				} else {
-					hide = false;
-				}
+				hide = !isFollowing;
 			}
 		}
 
diff --git a/packages/backend/src/core/entities/PageEntityService.ts b/packages/backend/src/core/entities/PageEntityService.ts
index d6da856637..94b26a5017 100644
--- a/packages/backend/src/core/entities/PageEntityService.ts
+++ b/packages/backend/src/core/entities/PageEntityService.ts
@@ -97,7 +97,7 @@ export class PageEntityService {
 			eyeCatchingImage: page.eyeCatchingImageId ? await this.driveFileEntityService.pack(page.eyeCatchingImageId) : null,
 			attachedFiles: this.driveFileEntityService.packMany((await Promise.all(attachedFiles)).filter((x): x is DriveFile => x != null)),
 			likedCount: page.likedCount,
-			isLiked: meId ? await this.pageLikesRepository.findOneBy({ pageId: page.id, userId: meId }).then(x => x != null) : undefined,
+			isLiked: meId ? await this.pageLikesRepository.exist({ where: { pageId: page.id, userId: meId } }) : undefined,
 		});
 	}
 
diff --git a/packages/backend/src/core/entities/UserEntityService.ts b/packages/backend/src/core/entities/UserEntityService.ts
index 6dacaa1032..7d248f8524 100644
--- a/packages/backend/src/core/entities/UserEntityService.ts
+++ b/packages/backend/src/core/entities/UserEntityService.ts
@@ -230,12 +230,14 @@ export class UserEntityService implements OnModuleInit {
 		/*
 		const myAntennas = (await this.antennaService.getAntennas()).filter(a => a.userId === userId);
 
-		const unread = myAntennas.length > 0 ? await this.antennaNotesRepository.findOneBy({
-			antennaId: In(myAntennas.map(x => x.id)),
-			read: false,
-		}) : null;
+		const isUnread = (myAntennas.length > 0 ? await this.antennaNotesRepository.exist({
+			where: {
+				antennaId: In(myAntennas.map(x => x.id)),
+				read: false,
+			},
+		}) : false);
 
-		return unread != null;
+		return isUnread;
 		*/
 		return false; // TODO
 	}
diff --git a/packages/backend/src/server/ActivityPubServerService.ts b/packages/backend/src/server/ActivityPubServerService.ts
index f53351d999..f751709345 100644
--- a/packages/backend/src/server/ActivityPubServerService.ts
+++ b/packages/backend/src/server/ActivityPubServerService.ts
@@ -189,7 +189,11 @@ export class ActivityPubServerService {
 			return (this.apRendererService.addContext(rendered));
 		} else {
 			// index page
-			const rendered = this.apRendererService.renderOrderedCollection(partOf, user.followersCount, `${partOf}?page=true`);
+			const rendered = this.apRendererService.renderOrderedCollection(
+				partOf,
+				user.followersCount,
+				`${partOf}?page=true`,
+			);
 			reply.header('Cache-Control', 'public, max-age=180');
 			this.setResponseType(request, reply);
 			return (this.apRendererService.addContext(rendered));
@@ -277,7 +281,11 @@ export class ActivityPubServerService {
 			return (this.apRendererService.addContext(rendered));
 		} else {
 			// index page
-			const rendered = this.apRendererService.renderOrderedCollection(partOf, user.followingCount, `${partOf}?page=true`);
+			const rendered = this.apRendererService.renderOrderedCollection(
+				partOf,
+				user.followingCount,
+				`${partOf}?page=true`,
+			);
 			reply.header('Cache-Control', 'public, max-age=180');
 			this.setResponseType(request, reply);
 			return (this.apRendererService.addContext(rendered));
@@ -310,7 +318,10 @@ export class ActivityPubServerService {
 
 		const rendered = this.apRendererService.renderOrderedCollection(
 			`${this.config.url}/users/${userId}/collections/featured`,
-			renderedNotes.length, undefined, undefined, renderedNotes,
+			renderedNotes.length,
+			undefined,
+			undefined,
+			renderedNotes,
 		);
 
 		reply.header('Cache-Control', 'public, max-age=180');
@@ -395,7 +406,9 @@ export class ActivityPubServerService {
 			return (this.apRendererService.addContext(rendered));
 		} else {
 			// index page
-			const rendered = this.apRendererService.renderOrderedCollection(partOf, user.notesCount,
+			const rendered = this.apRendererService.renderOrderedCollection(
+				partOf,
+				user.notesCount,
 				`${partOf}?page=true`,
 				`${partOf}?page=true&since_id=000000000000000000000000`,
 			);
diff --git a/packages/backend/src/server/api/SignupApiService.ts b/packages/backend/src/server/api/SignupApiService.ts
index fc5f3811eb..5e18dcbe08 100644
--- a/packages/backend/src/server/api/SignupApiService.ts
+++ b/packages/backend/src/server/api/SignupApiService.ts
@@ -128,12 +128,12 @@ export class SignupApiService {
 		}
 
 		if (instance.emailRequiredForSignup) {
-			if (await this.usersRepository.findOneBy({ usernameLower: username.toLowerCase(), host: IsNull() })) {
+			if (await this.usersRepository.exist({ where: { usernameLower: username.toLowerCase(), host: IsNull() } })) {
 				throw new FastifyReplyError(400, 'DUPLICATED_USERNAME');
 			}
 
 			// Check deleted username duplication
-			if (await this.usedUsernamesRepository.findOneBy({ username: username.toLowerCase() })) {
+			if (await this.usedUsernamesRepository.exist({ where: { username: username.toLowerCase() } })) {
 				throw new FastifyReplyError(400, 'USED_USERNAME');
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/admin/promo/create.ts b/packages/backend/src/server/api/endpoints/admin/promo/create.ts
index bee1ffbaee..8401cf51d9 100644
--- a/packages/backend/src/server/api/endpoints/admin/promo/create.ts
+++ b/packages/backend/src/server/api/endpoints/admin/promo/create.ts
@@ -50,9 +50,9 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				throw e;
 			});
 
-			const exist = await this.promoNotesRepository.findOneBy({ noteId: note.id });
+			const exist = await this.promoNotesRepository.exist({ where: { noteId: note.id } });
 
-			if (exist != null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyPromoted);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/admin/roles/update.ts b/packages/backend/src/server/api/endpoints/admin/roles/update.ts
index 467f157a61..1fedab4540 100644
--- a/packages/backend/src/server/api/endpoints/admin/roles/update.ts
+++ b/packages/backend/src/server/api/endpoints/admin/roles/update.ts
@@ -69,8 +69,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private globalEventService: GlobalEventService,
 	) {
 		super(meta, paramDef, async (ps) => {
-			const role = await this.rolesRepository.findOneBy({ id: ps.roleId });
-			if (role == null) {
+			const roleExist = await this.rolesRepository.exist({ where: { id: ps.roleId } });
+			if (!roleExist) {
 				throw new ApiError(meta.errors.noSuchRole);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/auth/accept.ts b/packages/backend/src/server/api/endpoints/auth/accept.ts
index e69f9c12e2..aa199ab730 100644
--- a/packages/backend/src/server/api/endpoints/auth/accept.ts
+++ b/packages/backend/src/server/api/endpoints/auth/accept.ts
@@ -58,12 +58,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			const accessToken = secureRndstr(32);
 
 			// Fetch exist access token
-			const exist = await this.accessTokensRepository.findOneBy({
-				appId: session.appId,
-				userId: me.id,
+			const exist = await this.accessTokensRepository.exist({
+				where: {
+					appId: session.appId,
+					userId: me.id,
+				},
 			});
 
-			if (exist == null) {
+			if (!exist) {
 				const app = await this.appsRepository.findOneByOrFail({ id: session.appId });
 
 				// Generate Hash
diff --git a/packages/backend/src/server/api/endpoints/blocking/create.ts b/packages/backend/src/server/api/endpoints/blocking/create.ts
index d9ba99f209..4ad40c8f1c 100644
--- a/packages/backend/src/server/api/endpoints/blocking/create.ts
+++ b/packages/backend/src/server/api/endpoints/blocking/create.ts
@@ -84,12 +84,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			});
 
 			// Check if already blocking
-			const exist = await this.blockingsRepository.findOneBy({
-				blockerId: blocker.id,
-				blockeeId: blockee.id,
+			const exist = await this.blockingsRepository.exist({
+				where: {
+					blockerId: blocker.id,
+					blockeeId: blockee.id,
+				},
 			});
 
-			if (exist != null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyBlocking);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/blocking/delete.ts b/packages/backend/src/server/api/endpoints/blocking/delete.ts
index 46dd26a45a..38913ae932 100644
--- a/packages/backend/src/server/api/endpoints/blocking/delete.ts
+++ b/packages/backend/src/server/api/endpoints/blocking/delete.ts
@@ -84,12 +84,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			});
 
 			// Check not blocking
-			const exist = await this.blockingsRepository.findOneBy({
-				blockerId: blocker.id,
-				blockeeId: blockee.id,
+			const exist = await this.blockingsRepository.exist({
+				where: {
+					blockerId: blocker.id,
+					blockeeId: blockee.id,
+				}
 			});
 
-			if (exist == null) {
+			if (!exist) {
 				throw new ApiError(meta.errors.notBlocking);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/clips/add-note.ts b/packages/backend/src/server/api/endpoints/clips/add-note.ts
index c3561e2a71..2837f2cf81 100644
--- a/packages/backend/src/server/api/endpoints/clips/add-note.ts
+++ b/packages/backend/src/server/api/endpoints/clips/add-note.ts
@@ -87,12 +87,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				throw e;
 			});
 
-			const exist = await this.clipNotesRepository.findOneBy({
-				noteId: note.id,
-				clipId: clip.id,
+			const exist = await this.clipNotesRepository.exist({
+				where: {
+					noteId: note.id,
+					clipId: clip.id,
+				},
 			});
 
-			if (exist != null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyClipped);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/clips/favorite.ts b/packages/backend/src/server/api/endpoints/clips/favorite.ts
index f08caaf8d7..ce09855531 100644
--- a/packages/backend/src/server/api/endpoints/clips/favorite.ts
+++ b/packages/backend/src/server/api/endpoints/clips/favorite.ts
@@ -58,12 +58,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				throw new ApiError(meta.errors.noSuchClip);
 			}
 
-			const exist = await this.clipFavoritesRepository.findOneBy({
-				clipId: clip.id,
-				userId: me.id,
+			const exist = await this.clipFavoritesRepository.exist({
+				where: {
+					clipId: clip.id,
+					userId: me.id,
+				},
 			});
 
-			if (exist != null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyFavorited);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/drive/files/check-existence.ts b/packages/backend/src/server/api/endpoints/drive/files/check-existence.ts
index 290cd4d2ce..cdcdde7e8a 100644
--- a/packages/backend/src/server/api/endpoints/drive/files/check-existence.ts
+++ b/packages/backend/src/server/api/endpoints/drive/files/check-existence.ts
@@ -34,12 +34,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private driveFilesRepository: DriveFilesRepository,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const file = await this.driveFilesRepository.findOneBy({
-				md5: ps.md5,
-				userId: me.id,
+			const exist = await this.driveFilesRepository.exist({
+				where: {
+					md5: ps.md5,
+					userId: me.id,
+				},
 			});
 
-			return file != null;
+			return exist;
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/endpoints/flash/like.ts b/packages/backend/src/server/api/endpoints/flash/like.ts
index 23de2f3970..57245f9f41 100644
--- a/packages/backend/src/server/api/endpoints/flash/like.ts
+++ b/packages/backend/src/server/api/endpoints/flash/like.ts
@@ -66,12 +66,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			}
 
 			// if already liked
-			const exist = await this.flashLikesRepository.findOneBy({
-				flashId: flash.id,
-				userId: me.id,
+			const exist = await this.flashLikesRepository.exist({
+				where: {
+					flashId: flash.id,
+					userId: me.id,
+				},
 			});
 
-			if (exist != null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyLiked);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/following/create.ts b/packages/backend/src/server/api/endpoints/following/create.ts
index 4ad16de911..009fc96f64 100644
--- a/packages/backend/src/server/api/endpoints/following/create.ts
+++ b/packages/backend/src/server/api/endpoints/following/create.ts
@@ -99,12 +99,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			});
 
 			// Check if already following
-			const exist = await this.followingsRepository.findOneBy({
-				followerId: follower.id,
-				followeeId: followee.id,
+			const exist = await this.followingsRepository.exist({
+				where: {
+					followerId: follower.id,
+					followeeId: followee.id,
+				},
 			});
 
-			if (exist != null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyFollowing);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/following/delete.ts b/packages/backend/src/server/api/endpoints/following/delete.ts
index 4f12db1273..570c4eb81e 100644
--- a/packages/backend/src/server/api/endpoints/following/delete.ts
+++ b/packages/backend/src/server/api/endpoints/following/delete.ts
@@ -84,12 +84,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			});
 
 			// Check not following
-			const exist = await this.followingsRepository.findOneBy({
-				followerId: follower.id,
-				followeeId: followee.id,
+			const exist = await this.followingsRepository.exist({
+				where: {
+					followerId: follower.id,
+					followeeId: followee.id,
+				},
 			});
 
-			if (exist == null) {
+			if (!exist) {
 				throw new ApiError(meta.errors.notFollowing);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/gallery/posts/like.ts b/packages/backend/src/server/api/endpoints/gallery/posts/like.ts
index 6ac5fa8606..c0bb55f640 100644
--- a/packages/backend/src/server/api/endpoints/gallery/posts/like.ts
+++ b/packages/backend/src/server/api/endpoints/gallery/posts/like.ts
@@ -66,12 +66,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			}
 
 			// if already liked
-			const exist = await this.galleryLikesRepository.findOneBy({
-				postId: post.id,
-				userId: me.id,
+			const exist = await this.galleryLikesRepository.exist({
+				where: {
+					postId: post.id,
+					userId: me.id,
+				},
 			});
 
-			if (exist != null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyLiked);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/i/import-antennas.ts b/packages/backend/src/server/api/endpoints/i/import-antennas.ts
index 12ec5855d3..8582e98f76 100644
--- a/packages/backend/src/server/api/endpoints/i/import-antennas.ts
+++ b/packages/backend/src/server/api/endpoints/i/import-antennas.ts
@@ -66,8 +66,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private downloadService: DownloadService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const users = await this.usersRepository.findOneBy({ id: me.id });
-			if (users === null) throw new ApiError(meta.errors.noSuchUser);
+			const userExist = await this.usersRepository.exist({ where: { id: me.id } });
+			if (!userExist) throw new ApiError(meta.errors.noSuchUser);
 			const file = await this.driveFilesRepository.findOneBy({ id: ps.fileId });
 			if (file === null) throw new ApiError(meta.errors.noSuchFile);
 			if (file.size === 0) throw new ApiError(meta.errors.emptyFile);
diff --git a/packages/backend/src/server/api/endpoints/i/read-announcement.ts b/packages/backend/src/server/api/endpoints/i/read-announcement.ts
index b8922b91e5..352fe54c5d 100644
--- a/packages/backend/src/server/api/endpoints/i/read-announcement.ts
+++ b/packages/backend/src/server/api/endpoints/i/read-announcement.ts
@@ -47,19 +47,21 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			// Check if announcement exists
-			const announcement = await this.announcementsRepository.findOneBy({ id: ps.announcementId });
+			const announcementExist = await this.announcementsRepository.exist({ where: { id: ps.announcementId } });
 
-			if (announcement == null) {
+			if (!announcementExist) {
 				throw new ApiError(meta.errors.noSuchAnnouncement);
 			}
 
 			// Check if already read
-			const read = await this.announcementReadsRepository.findOneBy({
-				announcementId: ps.announcementId,
-				userId: me.id,
+			const alreadyRead = await this.announcementReadsRepository.exist({
+				where: {
+					announcementId: ps.announcementId,
+					userId: me.id,
+				},
 			});
 
-			if (read != null) {
+			if (alreadyRead) {
 				return;
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/i/revoke-token.ts b/packages/backend/src/server/api/endpoints/i/revoke-token.ts
index 93daeb0cd7..415a60147b 100644
--- a/packages/backend/src/server/api/endpoints/i/revoke-token.ts
+++ b/packages/backend/src/server/api/endpoints/i/revoke-token.ts
@@ -28,9 +28,9 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private globalEventService: GlobalEventService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const token = await this.accessTokensRepository.findOneBy({ id: ps.tokenId });
+			const tokenExist = await this.accessTokensRepository.exist({ where: { id: ps.tokenId } });
 
-			if (token) {
+			if (tokenExist) {
 				await this.accessTokensRepository.delete({
 					id: ps.tokenId,
 					userId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/mute/create.ts b/packages/backend/src/server/api/endpoints/mute/create.ts
index ee358d5c6c..ef53f9ef41 100644
--- a/packages/backend/src/server/api/endpoints/mute/create.ts
+++ b/packages/backend/src/server/api/endpoints/mute/create.ts
@@ -79,12 +79,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			});
 
 			// Check if already muting
-			const exist = await this.mutingsRepository.findOneBy({
-				muterId: muter.id,
-				muteeId: mutee.id,
+			const exist = await this.mutingsRepository.exist({
+				where: {
+					muterId: muter.id,
+					muteeId: mutee.id,
+				},
 			});
 
-			if (exist != null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyMuting);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/notes/create.ts b/packages/backend/src/server/api/endpoints/notes/create.ts
index 96be5ed844..739316997a 100644
--- a/packages/backend/src/server/api/endpoints/notes/create.ts
+++ b/packages/backend/src/server/api/endpoints/notes/create.ts
@@ -217,11 +217,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 				// Check blocking
 				if (renote.userId !== me.id) {
-					const block = await this.blockingsRepository.findOneBy({
-						blockerId: renote.userId,
-						blockeeId: me.id,
+					const blockExist = await this.blockingsRepository.exist({
+						where: {
+							blockerId: renote.userId,
+							blockeeId: me.id,
+						},
 					});
-					if (block) {
+					if (blockExist) {
 						throw new ApiError(meta.errors.youHaveBeenBlocked);
 					}
 				}
@@ -240,11 +242,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 				// Check blocking
 				if (reply.userId !== me.id) {
-					const block = await this.blockingsRepository.findOneBy({
-						blockerId: reply.userId,
-						blockeeId: me.id,
+					const blockExist = await this.blockingsRepository.exist({
+						where: {
+							blockerId: reply.userId,
+							blockeeId: me.id,
+						},
 					});
-					if (block) {
+					if (blockExist) {
 						throw new ApiError(meta.errors.youHaveBeenBlocked);
 					}
 				}
diff --git a/packages/backend/src/server/api/endpoints/notes/favorites/create.ts b/packages/backend/src/server/api/endpoints/notes/favorites/create.ts
index 611ea19560..9299d66039 100644
--- a/packages/backend/src/server/api/endpoints/notes/favorites/create.ts
+++ b/packages/backend/src/server/api/endpoints/notes/favorites/create.ts
@@ -63,12 +63,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			});
 
 			// if already favorited
-			const exist = await this.noteFavoritesRepository.findOneBy({
-				noteId: note.id,
-				userId: me.id,
+			const exist = await this.noteFavoritesRepository.exist({
+				where: {
+					noteId: note.id,
+					userId: me.id,
+				},
 			});
 
-			if (exist != null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyFavorited);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/pages/like.ts b/packages/backend/src/server/api/endpoints/pages/like.ts
index 543c126d9c..bc66488103 100644
--- a/packages/backend/src/server/api/endpoints/pages/like.ts
+++ b/packages/backend/src/server/api/endpoints/pages/like.ts
@@ -66,12 +66,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			}
 
 			// if already liked
-			const exist = await this.pageLikesRepository.findOneBy({
-				pageId: page.id,
-				userId: me.id,
+			const exist = await this.pageLikesRepository.exist({
+				where: {
+					pageId: page.id,
+					userId: me.id,
+				},
 			});
 
-			if (exist != null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyLiked);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/promo/read.ts b/packages/backend/src/server/api/endpoints/promo/read.ts
index 90febdbce7..9baa930f5f 100644
--- a/packages/backend/src/server/api/endpoints/promo/read.ts
+++ b/packages/backend/src/server/api/endpoints/promo/read.ts
@@ -44,12 +44,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				throw err;
 			});
 
-			const exist = await this.promoReadsRepository.findOneBy({
-				noteId: note.id,
-				userId: me.id,
+			const exist = await this.promoReadsRepository.exist({
+				where: {
+					noteId: note.id,
+					userId: me.id,
+				},
 			});
 
-			if (exist != null) {
+			if (exist) {
 				return;
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/users/followers.ts b/packages/backend/src/server/api/endpoints/users/followers.ts
index c6f71474bc..18d66500ab 100644
--- a/packages/backend/src/server/api/endpoints/users/followers.ts
+++ b/packages/backend/src/server/api/endpoints/users/followers.ts
@@ -97,11 +97,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				if (me == null) {
 					throw new ApiError(meta.errors.forbidden);
 				} else if (me.id !== user.id) {
-					const following = await this.followingsRepository.findOneBy({
-						followeeId: user.id,
-						followerId: me.id,
+					const isFollowing = await this.followingsRepository.exist({
+						where: {
+							followeeId: user.id,
+							followerId: me.id,
+						},
 					});
-					if (following == null) {
+					if (!isFollowing) {
 						throw new ApiError(meta.errors.forbidden);
 					}
 				}
diff --git a/packages/backend/src/server/api/endpoints/users/following.ts b/packages/backend/src/server/api/endpoints/users/following.ts
index b072c96626..6ea7b923d6 100644
--- a/packages/backend/src/server/api/endpoints/users/following.ts
+++ b/packages/backend/src/server/api/endpoints/users/following.ts
@@ -97,11 +97,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				if (me == null) {
 					throw new ApiError(meta.errors.forbidden);
 				} else if (me.id !== user.id) {
-					const following = await this.followingsRepository.findOneBy({
-						followeeId: user.id,
-						followerId: me.id,
+					const isFollowing = await this.followingsRepository.exist({
+						where: {
+							followeeId: user.id,
+							followerId: me.id,
+						},
 					});
-					if (following == null) {
+					if (!isFollowing) {
 						throw new ApiError(meta.errors.forbidden);
 					}
 				}
diff --git a/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts b/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts
index cccffcdad4..beb0ba85ff 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts
@@ -84,11 +84,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private roleService: RoleService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const list = await this.userListsRepository.findOneBy({
-				id: ps.listId,
-				isPublic: true,
+			const listExist = await this.userListsRepository.exist({
+				where: {
+					id: ps.listId,
+					isPublic: true,
+				},
 			});
-			if (list === null) throw new ApiError(meta.errors.noSuchList);
+			if (!listExist) throw new ApiError(meta.errors.noSuchList);
 			const currentCount = await this.userListsRepository.countBy({
 				userId: me.id,
 			});
@@ -114,18 +116,22 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				});
 
 				if (currentUser.id !== me.id) {
-					const block = await this.blockingsRepository.findOneBy({
-						blockerId: currentUser.id,
-						blockeeId: me.id,
+					const blockExist = await this.blockingsRepository.exist({
+						where: {
+							blockerId: currentUser.id,
+							blockeeId: me.id,
+						},
 					});
-					if (block) {
+					if (blockExist) {
 						throw new ApiError(meta.errors.youHaveBeenBlocked);
 					}
 				}
 
-				const exist = await this.userListJoiningsRepository.findOneBy({
-					userListId: userList.id,
-					userId: currentUser.id,
+				const exist = await this.userListJoiningsRepository.exist({
+					where: {
+						userListId: userList.id,
+						userId: currentUser.id,
+					},
 				});
 
 				if (exist) {
diff --git a/packages/backend/src/server/api/endpoints/users/lists/favorite.ts b/packages/backend/src/server/api/endpoints/users/lists/favorite.ts
index ea1a022bec..2c09a47fef 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/favorite.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/favorite.ts
@@ -41,21 +41,25 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private idService: IdService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const userList = await this.userListsRepository.findOneBy({
-				id: ps.listId,
-				isPublic: true,
+			const userListExist = await this.userListsRepository.exist({
+				where: {
+					id: ps.listId,
+					isPublic: true,
+				},
 			});
 
-			if (userList === null) {
+			if (!userListExist) {
 				throw new ApiError(meta.errors.noSuchList);
 			}
 
-			const exist = await this.userListFavoritesRepository.findOneBy({
-				userId: me.id,
-				userListId: ps.listId,
+			const exist = await this.userListFavoritesRepository.exist({
+				where: {
+					userId: me.id,
+					userListId: ps.listId,
+				},
 			});
 
-			if (exist !== null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyFavorited);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/users/lists/push.ts b/packages/backend/src/server/api/endpoints/users/lists/push.ts
index 925037e484..6e1f6b2c62 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/push.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/push.ts
@@ -100,18 +100,22 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 			// Check blocking
 			if (user.id !== me.id) {
-				const block = await this.blockingsRepository.findOneBy({
-					blockerId: user.id,
-					blockeeId: me.id,
+				const blockExist = await this.blockingsRepository.exist({
+					where: {
+						blockerId: user.id,
+						blockeeId: me.id,
+					},
 				});
-				if (block) {
+				if (blockExist) {
 					throw new ApiError(meta.errors.youHaveBeenBlocked);
 				}
 			}
 
-			const exist = await this.userListJoiningsRepository.findOneBy({
-				userListId: userList.id,
-				userId: user.id,
+			const exist = await this.userListJoiningsRepository.exist({
+				where: {
+					userListId: userList.id,
+					userId: user.id,
+				},
 			});
 
 			if (exist) {
diff --git a/packages/backend/src/server/api/endpoints/users/lists/show.ts b/packages/backend/src/server/api/endpoints/users/lists/show.ts
index 8077841c8c..3fd418d04e 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/show.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/show.ts
@@ -69,10 +69,12 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 					userListId: ps.listId,
 				});
 				if (me !== null) {
-					additionalProperties.isLiked = (await this.userListFavoritesRepository.findOneBy({
-						userId: me.id,
-						userListId: ps.listId,
-					}) !== null);
+					additionalProperties.isLiked = await this.userListFavoritesRepository.exist({
+						where: {
+							userId: me.id,
+							userListId: ps.listId,
+						},
+					});
 				} else {
 					additionalProperties.isLiked = false;
 				}
diff --git a/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts b/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts
index be8e317816..a7c3b58947 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts
@@ -39,12 +39,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private userListFavoritesRepository: UserListFavoritesRepository,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const userList = await this.userListsRepository.findOneBy({
-				id: ps.listId,
-				isPublic: true,
+			const userListExist = await this.userListsRepository.exist({
+				where: {
+					id: ps.listId,
+					isPublic: true,
+				},
 			});
 
-			if (userList === null) {
+			if (!userListExist) {
 				throw new ApiError(meta.errors.noSuchList);
 			}
 
diff --git a/packages/backend/src/server/api/stream/channels/user-list.ts b/packages/backend/src/server/api/stream/channels/user-list.ts
index d97d2b8ba9..ea4cff0bc0 100644
--- a/packages/backend/src/server/api/stream/channels/user-list.ts
+++ b/packages/backend/src/server/api/stream/channels/user-list.ts
@@ -34,11 +34,13 @@ class UserListChannel extends Channel {
 		this.listId = params.listId as string;
 
 		// Check existence and owner
-		const list = await this.userListsRepository.findOneBy({
-			id: this.listId,
-			userId: this.user!.id,
+		const listExist = await this.userListsRepository.exist({
+			where: {
+				id: this.listId,
+				userId: this.user!.id,
+			},
 		});
-		if (!list) return;
+		if (!listExist) return;
 
 		// Subscribe stream
 		this.subscriber.on(`userListStream:${this.listId}`, this.send);
diff --git a/packages/frontend/.storybook/changes.ts b/packages/frontend/.storybook/changes.ts
index fc0f0c286b..a1275132be 100644
--- a/packages/frontend/.storybook/changes.ts
+++ b/packages/frontend/.storybook/changes.ts
@@ -1,7 +1,10 @@
 import fs from 'node:fs/promises';
+import { fileURLToPath } from 'node:url';
 import path from 'node:path';
 import micromatch from 'micromatch';
-import main from './main';
+import main from './main.js';
+
+const __dirname = fileURLToPath(new URL('.', import.meta.url));
 
 interface Stats {
 	readonly modules: readonly {
@@ -13,8 +16,8 @@ interface Stats {
 	}[];
 }
 
-fs.readFile(
-	path.resolve(__dirname, '../storybook-static/preview-stats.json')
+await fs.readFile(
+	new URL('../storybook-static/preview-stats.json', import.meta.url)
 ).then((buffer) => {
 	const stats: Stats = JSON.parse(buffer.toString());
 	const keys = new Set(stats.modules.map((stat) => stat.id));
diff --git a/packages/frontend/.storybook/main.ts b/packages/frontend/.storybook/main.ts
index 1d0ce5ab63..b64979980a 100644
--- a/packages/frontend/.storybook/main.ts
+++ b/packages/frontend/.storybook/main.ts
@@ -1,7 +1,11 @@
 import { resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
 import type { StorybookConfig } from '@storybook/vue3-vite';
 import { type Plugin, mergeConfig } from 'vite';
 import turbosnap from 'vite-plugin-turbosnap';
+
+const dirname = fileURLToPath(new URL('.', import.meta.url));
+
 const config = {
 	stories: ['../src/**/*.mdx', '../src/**/*.stories.@(js|jsx|ts|tsx)'],
 	addons: [
@@ -9,7 +13,7 @@ const config = {
 		'@storybook/addon-interactions',
 		'@storybook/addon-links',
 		'@storybook/addon-storysource',
-		resolve(__dirname, '../node_modules/storybook-addon-misskey-theme'),
+		resolve(dirname, '../node_modules/storybook-addon-misskey-theme'),
 	],
 	framework: {
 		name: '@storybook/vue3-vite',
@@ -28,7 +32,8 @@ const config = {
 		}
 		return mergeConfig(config, {
 			plugins: [
-				turbosnap({
+				// XXX: https://github.com/IanVS/vite-plugin-turbosnap/issues/8
+				(turbosnap as any as typeof turbosnap['default'])({
 					rootDir: config.root ?? process.cwd(),
 				}),
 			],
diff --git a/packages/frontend/.storybook/package.json b/packages/frontend/.storybook/package.json
new file mode 100644
index 0000000000..bedb411a91
--- /dev/null
+++ b/packages/frontend/.storybook/package.json
@@ -0,0 +1,3 @@
+{
+	"type": "module"
+}
diff --git a/packages/frontend/.storybook/preload-locale.ts b/packages/frontend/.storybook/preload-locale.ts
index a54164742a..2b7362b88d 100644
--- a/packages/frontend/.storybook/preload-locale.ts
+++ b/packages/frontend/.storybook/preload-locale.ts
@@ -1,9 +1,8 @@
 import { writeFile } from 'node:fs/promises';
-import { resolve } from 'node:path';
-import * as locales from '../../../locales';
+import locales from '../../../locales/index.js';
 
-writeFile(
-	resolve(__dirname, 'locale.ts'),
+await writeFile(
+	new URL('locale.ts', import.meta.url),
 	`export default ${JSON.stringify(locales['ja-JP'], undefined, 2)} as const;`,
 	'utf8',
 )
diff --git a/packages/frontend/.storybook/preload-theme.ts b/packages/frontend/.storybook/preload-theme.ts
index 1ff8f71ecd..42fbeff738 100644
--- a/packages/frontend/.storybook/preload-theme.ts
+++ b/packages/frontend/.storybook/preload-theme.ts
@@ -1,6 +1,5 @@
 import { readFile, writeFile } from 'node:fs/promises';
-import { resolve } from 'node:path';
-import * as JSON5 from 'json5';
+import JSON5 from 'json5';
 
 const keys = [
 	'_dark',
@@ -26,9 +25,9 @@ const keys = [
 	'd-u0',
 ]
 
-Promise.all(keys.map((key) => readFile(resolve(__dirname, `../src/themes/${key}.json5`), 'utf8'))).then((sources) => {
+await Promise.all(keys.map((key) => readFile(new URL(`../src/themes/${key}.json5`, import.meta.url), 'utf8'))).then((sources) => {
 	writeFile(
-		resolve(__dirname, './themes.ts'),
+		new URL('./themes.ts', import.meta.url),
 		`export default ${JSON.stringify(
 			Object.fromEntries(sources.map((source, i) => [keys[i], JSON5.parse(source)])),
 			undefined,
diff --git a/packages/frontend/.storybook/preview.ts b/packages/frontend/.storybook/preview.ts
index e887acaa2e..67c81c666b 100644
--- a/packages/frontend/.storybook/preview.ts
+++ b/packages/frontend/.storybook/preview.ts
@@ -3,10 +3,10 @@ import { FORCE_REMOUNT } from '@storybook/core-events';
 import { type Preview, setup } from '@storybook/vue3';
 import isChromatic from 'chromatic/isChromatic';
 import { initialize, mswDecorator } from 'msw-storybook-addon';
-import { userDetailed } from './fakes';
-import locale from './locale';
-import { commonHandlers, onUnhandledRequest } from './mocks';
-import themes from './themes';
+import { userDetailed } from './fakes.js';
+import locale from './locale.js';
+import { commonHandlers, onUnhandledRequest } from './mocks.js';
+import themes from './themes.js';
 import '../src/style.scss';
 
 const appInitialized = Symbol();
diff --git a/packages/frontend/.storybook/tsconfig.json b/packages/frontend/.storybook/tsconfig.json
index 2db2f1eabe..02465f5afa 100644
--- a/packages/frontend/.storybook/tsconfig.json
+++ b/packages/frontend/.storybook/tsconfig.json
@@ -1,5 +1,7 @@
 {
 	"compilerOptions": {
+		"target": "es2022",
+		"module": "Node16",
 		"strict": true,
 		"allowUnusedLabels": false,
 		"allowUnreachableCode": false,
diff --git a/packages/frontend/src/cache.ts b/packages/frontend/src/cache.ts
index c95da64bba..cb315c8ff7 100644
--- a/packages/frontend/src/cache.ts
+++ b/packages/frontend/src/cache.ts
@@ -4,3 +4,4 @@ import { Cache } from '@/scripts/cache';
 export const clipsCache = new Cache<misskey.entities.Clip[]>(Infinity);
 export const rolesCache = new Cache(Infinity);
 export const userListsCache = new Cache<misskey.entities.UserList[]>(Infinity);
+export const antennasCache = new Cache<misskey.entities.Antenna[]>(Infinity);
diff --git a/packages/frontend/src/components/MkAvatars.vue b/packages/frontend/src/components/MkAvatars.vue
index 630620fc08..437dce0a14 100644
--- a/packages/frontend/src/components/MkAvatars.vue
+++ b/packages/frontend/src/components/MkAvatars.vue
@@ -1,24 +1,29 @@
 <template>
 <div>
-	<div v-for="user in users" :key="user.id" style="display:inline-block;width:32px;height:32px;margin-right:8px;">
+	<div v-for="user in users.slice(0, limit)" :key="user.id" style="display:inline-block;width:32px;height:32px;margin-right:8px;">
 		<MkAvatar :user="user" style="width:32px; height:32px;" indicator link preview/>
 	</div>
+	<div v-if="users.length > limit" style="display: inline-block;">...</div>
 </div>
 </template>
 
 <script lang="ts" setup>
 import { onMounted, ref } from 'vue';
 import * as os from '@/os';
+import { UserLite } from 'misskey-js/built/entities';
 
-const props = defineProps<{
+const props = withDefaults(defineProps<{
 	userIds: string[];
-}>();
+	limit?: number;
+}>(), {
+	limit: Infinity,
+});
 
-const users = ref([]);
+const users = ref<UserLite[]>([]);
 
 onMounted(async () => {
 	users.value = await os.api('users/show', {
 		userIds: props.userIds,
-	});
+	}) as unknown as UserLite[];
 });
 </script>
diff --git a/packages/frontend/src/components/MkMediaList.vue b/packages/frontend/src/components/MkMediaList.vue
index 34f59c5573..be0aed6524 100644
--- a/packages/frontend/src/components/MkMediaList.vue
+++ b/packages/frontend/src/components/MkMediaList.vue
@@ -113,7 +113,7 @@ onMounted(() => {
 			right: 0,
 		},
 		imageClickAction: 'close',
-		tapAction: 'toggle-controls',
+		tapAction: 'close',
 		bgOpacity: 1,
 		showAnimationDuration: 100,
 		hideAnimationDuration: 100,
diff --git a/packages/frontend/src/components/global/MkA.stories.impl.ts b/packages/frontend/src/components/global/MkA.stories.impl.ts
index 639ed19af2..6e3ff573cb 100644
--- a/packages/frontend/src/components/global/MkA.stories.impl.ts
+++ b/packages/frontend/src/components/global/MkA.stories.impl.ts
@@ -29,11 +29,11 @@ export const Default = {
 		const canvas = within(canvasElement);
 		const a = canvas.getByRole<HTMLAnchorElement>('link');
 		await expect(a.href).toMatch(/^https?:\/\/.*#test$/);
-		await userEvent.click(a, { button: 2 });
+		await userEvent.pointer({ keys: '[MouseRight]', target: a });
 		await tick();
 		const menu = canvas.getByRole('menu');
 		await expect(menu).toBeInTheDocument();
-		await userEvent.click(a, { button: 0 });
+		await userEvent.click(a);
 		a.blur();
 		await tick();
 		await expect(menu).not.toBeInTheDocument();
diff --git a/packages/frontend/src/components/global/MkAd.stories.impl.ts b/packages/frontend/src/components/global/MkAd.stories.impl.ts
index 7d8a42a03c..58b6cc14c4 100644
--- a/packages/frontend/src/components/global/MkAd.stories.impl.ts
+++ b/packages/frontend/src/components/global/MkAd.stories.impl.ts
@@ -1,9 +1,9 @@
 /* eslint-disable @typescript-eslint/explicit-function-return-type */
 import { expect } from '@storybook/jest';
-import { userEvent, within } from '@storybook/testing-library';
+import { userEvent, waitFor, within } from '@storybook/testing-library';
 import { StoryObj } from '@storybook/vue3';
-import { i18n } from '@/i18n';
 import MkAd from './MkAd.vue';
+import { i18n } from '@/i18n';
 const common = {
 	render(args) {
 		return {
@@ -36,6 +36,7 @@ const common = {
 		const i = buttons[0];
 		await expect(i).toBeInTheDocument();
 		await userEvent.click(i);
+		await waitFor(() => expect(canvasElement).toHaveTextContent(i18n.ts._ad.back));
 		await expect(a).not.toBeInTheDocument();
 		await expect(i).not.toBeInTheDocument();
 		buttons = canvas.getAllByRole<HTMLButtonElement>('button');
@@ -49,6 +50,7 @@ const common = {
 		await expect(back).toBeInTheDocument();
 		await expect(back).toHaveTextContent(i18n.ts._ad.back);
 		await userEvent.click(back);
+		await waitFor(() => expect(canvas.queryByRole('img')).toBeTruthy());
 		if (reduce) {
 			await expect(reduce).not.toBeInTheDocument();
 		}
diff --git a/packages/frontend/src/pages/channel.vue b/packages/frontend/src/pages/channel.vue
index bcc0fc6860..2a056f21d4 100644
--- a/packages/frontend/src/pages/channel.vue
+++ b/packages/frontend/src/pages/channel.vue
@@ -87,7 +87,7 @@ const props = defineProps<{
 	channelId: string;
 }>();
 
-let tab = $ref('timeline');
+let tab = $ref('overview');
 let channel = $ref(null);
 let favorited = $ref(false);
 let searchQuery = $ref('');
@@ -107,6 +107,9 @@ watch(() => props.channelId, async () => {
 		channelId: props.channelId,
 	});
 	favorited = channel.isFavorited;
+	if (favorited || channel.isFollowing) {
+		tab = 'timeline';
+	}
 }, { immediate: true });
 
 function edit() {
diff --git a/packages/frontend/src/pages/custom-emojis-manager.vue b/packages/frontend/src/pages/custom-emojis-manager.vue
index dde4d67f18..359bbeadc3 100644
--- a/packages/frontend/src/pages/custom-emojis-manager.vue
+++ b/packages/frontend/src/pages/custom-emojis-manager.vue
@@ -18,7 +18,7 @@
 						<MkButton inline @click="setTagBulk">Set tag</MkButton>
 						<MkButton inline @click="addTagBulk">Add tag</MkButton>
 						<MkButton inline @click="removeTagBulk">Remove tag</MkButton>
-						<MkButton inline @click="setLisenceBulk">Set Lisence</MkButton>
+						<MkButton inline @click="setLicenseBulk">Set License</MkButton>
 						<MkButton inline danger @click="delBulk">Delete</MkButton>
 					</div>
 					<MkPagination ref="emojisPaginationComponent" :pagination="pagination">
@@ -221,7 +221,7 @@ const setCategoryBulk = async () => {
 	emojisPaginationComponent.value.reload();
 };
 
-const setLisenceBulk = async () => {
+const setLicenseBulk = async () => {
 	const { canceled, result } = await os.inputText({
 		title: 'License',
 	});
diff --git a/packages/frontend/src/pages/my-antennas/create.vue b/packages/frontend/src/pages/my-antennas/create.vue
index 355d18fdb5..632c36bbf8 100644
--- a/packages/frontend/src/pages/my-antennas/create.vue
+++ b/packages/frontend/src/pages/my-antennas/create.vue
@@ -9,6 +9,7 @@ import XAntenna from './editor.vue';
 import { i18n } from '@/i18n';
 import { definePageMetadata } from '@/scripts/page-metadata';
 import { useRouter } from '@/router';
+import { antennasCache } from '@/cache';
 
 const router = useRouter();
 
@@ -26,13 +27,10 @@ let draft = $ref({
 });
 
 function onAntennaCreated() {
+	antennasCache.delete();
 	router.push('/my/antennas');
 }
 
-const headerActions = $computed(() => []);
-
-const headerTabs = $computed(() => []);
-
 definePageMetadata({
 	title: i18n.ts.manageAntennas,
 	icon: 'ti ti-antenna',
diff --git a/packages/frontend/src/pages/my-antennas/edit.vue b/packages/frontend/src/pages/my-antennas/edit.vue
index da9b2de48f..3fb9690ac1 100644
--- a/packages/frontend/src/pages/my-antennas/edit.vue
+++ b/packages/frontend/src/pages/my-antennas/edit.vue
@@ -10,6 +10,7 @@ import * as os from '@/os';
 import { i18n } from '@/i18n';
 import { useRouter } from '@/router';
 import { definePageMetadata } from '@/scripts/page-metadata';
+import { antennasCache } from '@/cache';
 
 const router = useRouter();
 
@@ -20,6 +21,7 @@ const props = defineProps<{
 }>();
 
 function onAntennaUpdated() {
+	antennasCache.delete();
 	router.push('/my/antennas');
 }
 
@@ -27,10 +29,6 @@ os.api('antennas/show', { antennaId: props.antennaId }).then((antennaResponse) =
 	antenna = antennaResponse;
 });
 
-const headerActions = $computed(() => []);
-
-const headerTabs = $computed(() => []);
-
 definePageMetadata({
 	title: i18n.ts.manageAntennas,
 	icon: 'ti ti-antenna',
diff --git a/packages/frontend/src/pages/my-antennas/index.vue b/packages/frontend/src/pages/my-antennas/index.vue
index 2ca026b9a1..1e9136f1fa 100644
--- a/packages/frontend/src/pages/my-antennas/index.vue
+++ b/packages/frontend/src/pages/my-antennas/index.vue
@@ -2,15 +2,20 @@
 <MkStickyContainer>
 	<template #header><MkPageHeader :actions="headerActions" :tabs="headerTabs"/></template>
 	<MkSpacer :contentMax="700">
-		<div class="ieepwinx">
-			<MkButton :link="true" to="/my/antennas/create" primary class="add"><i class="ti ti-plus"></i> {{ i18n.ts.add }}</MkButton>
+		<div>
+			<div v-if="antennas.length === 0" class="empty">
+				<div class="_fullinfo">
+					<img :src="infoImageUrl" class="_ghost"/>
+					<div>{{ i18n.ts.nothing }}</div>
+				</div>
+			</div>
 
-			<div class="">
-				<MkPagination v-slot="{items}" ref="list" :pagination="pagination">
-					<MkA v-for="antenna in items" :key="antenna.id" class="ljoevbzj" :to="`/my/antennas/${antenna.id}`">
-						<div class="name">{{ antenna.name }}</div>
-					</MkA>
-				</MkPagination>
+			<MkButton :link="true" to="/my/antennas/create" primary :class="$style.add"><i class="ti ti-plus"></i> {{ i18n.ts.add }}</MkButton>
+
+			<div v-if="antennas.length > 0" class="_gaps">
+				<MkA v-for="antenna in antennas" :key="antenna.id" :class="$style.antenna" :to="`/my/antennas/${antenna.id}`">
+					<div class="name">{{ antenna.name }}</div>
+				</MkA>
 			</div>
 		</div>
 	</MkSpacer>
@@ -18,19 +23,31 @@
 </template>
 
 <script lang="ts" setup>
-import { } from 'vue';
-import MkPagination from '@/components/MkPagination.vue';
 import MkButton from '@/components/MkButton.vue';
 import { i18n } from '@/i18n';
 import { definePageMetadata } from '@/scripts/page-metadata';
+import { antennasCache } from '@/cache';
+import { api } from '@/os';
+import { onActivated } from 'vue';
+import { infoImageUrl } from '@/instance';
 
-const pagination = {
-	endpoint: 'antennas/list' as const,
-	noPaging: true,
-	limit: 10,
-};
+const antennas = $computed(() => antennasCache.value.value ?? []);
 
-const headerActions = $computed(() => []);
+function fetch() {
+	antennasCache.fetch(() => api('antennas/list'));
+}
+
+fetch();
+
+const headerActions = $computed(() => [{
+	asFullButton: true,
+	icon: 'ti ti-refresh',
+	text: i18n.ts.reload,
+	handler: () => {
+		antennasCache.delete();
+		fetch();
+	},
+}]);
 
 const headerTabs = $computed(() => []);
 
@@ -38,30 +55,30 @@ definePageMetadata({
 	title: i18n.ts.manageAntennas,
 	icon: 'ti ti-antenna',
 });
+
+onActivated(() => {
+	antennasCache.fetch(() => api('antennas/list'));
+});
 </script>
 
-<style lang="scss" scoped>
-.ieepwinx {
+<style lang="scss" module>
+.add {
+	margin: 0 auto 16px auto;
+}
 
-	> .add {
-		margin: 0 auto 16px auto;
-	}
+.antenna {
+	display: block;
+	padding: 16px;
+	border: solid 1px var(--divider);
+	border-radius: 6px;
 
-	.ljoevbzj {
-		display: block;
-		padding: 16px;
-		margin-bottom: 8px;
-		border: solid 1px var(--divider);
-		border-radius: 6px;
-
-		&:hover {
-			border: solid 1px var(--accent);
-			text-decoration: none;
-		}
-
-		> .name {
-			font-weight: bold;
-		}
+	&:hover {
+		border: solid 1px var(--accent);
+		text-decoration: none;
 	}
 }
+
+.name {
+	font-weight: bold;
+}
 </style>
diff --git a/packages/frontend/src/pages/my-lists/index.vue b/packages/frontend/src/pages/my-lists/index.vue
index cee241c489..0f59ca0b36 100644
--- a/packages/frontend/src/pages/my-lists/index.vue
+++ b/packages/frontend/src/pages/my-lists/index.vue
@@ -3,38 +3,43 @@
 	<template #header><MkPageHeader :actions="headerActions" :tabs="headerTabs"/></template>
 	<MkSpacer :contentMax="700">
 		<div class="_gaps">
+			<div v-if="items.length === 0" class="empty">
+				<div class="_fullinfo">
+					<img :src="infoImageUrl" class="_ghost"/>
+					<div>{{ i18n.ts.nothing }}</div>
+				</div>
+			</div>
+
 			<MkButton primary rounded style="margin: 0 auto;" @click="create"><i class="ti ti-plus"></i> {{ i18n.ts.createList }}</MkButton>
 
-			<MkPagination v-slot="{items}" ref="pagingComponent" :pagination="pagination">
-				<div class="_gaps">
-					<MkA v-for="list in items" :key="list.id" class="_panel" :class="$style.list" :to="`/my/lists/${ list.id }`">
-						<div style="margin-bottom: 4px;">{{ list.name }}</div>
-						<MkAvatars :userIds="list.userIds"/>
-					</MkA>
-				</div>
-			</MkPagination>
+			<div v-if="items.length > 0" class="_gaps">
+				<MkA v-for="list in items" :key="list.id" class="_panel" :class="$style.list" :to="`/my/lists/${ list.id }`">
+					<div style="margin-bottom: 4px;">{{ list.name }}</div>
+					<MkAvatars :userIds="list.userIds" :limit="10"/>
+				</MkA>
+			</div>
 		</div>
 	</MkSpacer>
 </MkStickyContainer>
 </template>
 
 <script lang="ts" setup>
-import { } from 'vue';
-import MkPagination from '@/components/MkPagination.vue';
+import { onActivated } from 'vue';
 import MkButton from '@/components/MkButton.vue';
 import MkAvatars from '@/components/MkAvatars.vue';
 import * as os from '@/os';
 import { i18n } from '@/i18n';
 import { definePageMetadata } from '@/scripts/page-metadata';
 import { userListsCache } from '@/cache';
+import { infoImageUrl } from '@/instance';
 
-const pagingComponent = $shallowRef<InstanceType<typeof MkPagination>>();
+const items = $computed(() => userListsCache.value.value ?? []);
 
-const pagination = {
-	endpoint: 'users/lists/list' as const,
-	noPaging: true,
-	limit: 10,
-};
+function fetch() {
+	userListsCache.fetch(() => os.api('users/lists/list'));
+}
+
+fetch();
 
 async function create() {
 	const { canceled, result: name } = await os.inputText({
@@ -43,10 +48,18 @@ async function create() {
 	if (canceled) return;
 	await os.apiWithDialog('users/lists/create', { name: name });
 	userListsCache.delete();
-	pagingComponent.reload();
+	fetch();
 }
 
-const headerActions = $computed(() => []);
+const headerActions = $computed(() => [{
+	asFullButton: true,
+	icon: 'ti ti-refresh',
+	text: i18n.ts.reload,
+	handler: () => {
+		userListsCache.delete();
+		fetch();
+	},
+}]);
 
 const headerTabs = $computed(() => []);
 
@@ -58,6 +71,10 @@ definePageMetadata({
 		handler: create,
 	},
 });
+
+onActivated(() => {
+	fetch();
+});
 </script>
 
 <style lang="scss" module>
diff --git a/packages/frontend/src/pages/settings/index.vue b/packages/frontend/src/pages/settings/index.vue
index b4f056d8a6..d53519e0d5 100644
--- a/packages/frontend/src/pages/settings/index.vue
+++ b/packages/frontend/src/pages/settings/index.vue
@@ -166,7 +166,7 @@ const menuDef = computed(() => [{
 		active: currentPage?.route.name === 'import-export',
 	}, {
 		icon: 'ti ti-plane',
-		text: `${i18n.ts.accountMigration} (${i18n.ts.experimental})`,
+		text: `${i18n.ts.accountMigration}`,
 		to: '/settings/migration',
 		active: currentPage?.route.name === 'migration',
 	}, {
diff --git a/packages/frontend/src/pages/settings/migration.vue b/packages/frontend/src/pages/settings/migration.vue
index 102bc68523..38e0d0abb2 100644
--- a/packages/frontend/src/pages/settings/migration.vue
+++ b/packages/frontend/src/pages/settings/migration.vue
@@ -1,8 +1,5 @@
 <template>
 <div class="_gaps_m">
-	<FormInfo warn>
-		{{ i18n.ts.thisIsExperimentalFeature }}
-	</FormInfo>
 	<MkFolder :defaultOpen="true">
 		<template #icon><i class="ti ti-plane-arrival"></i></template>
 		<template #label>{{ i18n.ts._accountMigration.moveFrom }}</template>
diff --git a/packages/frontend/src/scripts/cache.ts b/packages/frontend/src/scripts/cache.ts
index 858e5f03bf..a61d858353 100644
--- a/packages/frontend/src/scripts/cache.ts
+++ b/packages/frontend/src/scripts/cache.ts
@@ -1,7 +1,8 @@
+import { ref } from "vue";
 
 export class Cache<T> {
 	private cachedAt: number | null = null;
-	private value: T | undefined;
+	public value = ref<T | undefined>();
 	private lifetime: number;
 
 	constructor(lifetime: Cache<never>['lifetime']) {
@@ -10,21 +11,20 @@ export class Cache<T> {
 
 	public set(value: T): void {
 		this.cachedAt = Date.now();
-		this.value = value;
+		this.value.value = value;
 	}
 
-	public get(): T | undefined {
+	private get(): T | undefined {
 		if (this.cachedAt == null) return undefined;
 		if ((Date.now() - this.cachedAt) > this.lifetime) {
-			this.value = undefined;
+			this.value.value = undefined;
 			this.cachedAt = null;
 			return undefined;
 		}
-		return this.value;
+		return this.value.value;
 	}
 
 	public delete() {
-		this.value = undefined;
 		this.cachedAt = null;
 	}
 
diff --git a/packages/frontend/src/scripts/get-user-menu.ts b/packages/frontend/src/scripts/get-user-menu.ts
index c884ed76cb..1c93d58b44 100644
--- a/packages/frontend/src/scripts/get-user-menu.ts
+++ b/packages/frontend/src/scripts/get-user-menu.ts
@@ -1,14 +1,15 @@
+import { toUnicode } from 'punycode';
 import { defineAsyncComponent } from 'vue';
 import * as misskey from 'misskey-js';
 import { i18n } from '@/i18n';
 import copyToClipboard from '@/scripts/copy-to-clipboard';
-import { host } from '@/config';
+import { host, url } from '@/config';
 import * as os from '@/os';
 import { defaultStore, userActions } from '@/store';
 import { $i, iAmModerator } from '@/account';
 import { mainRouter } from '@/router';
 import { Router } from '@/nirax';
-import { rolesCache, userListsCache } from '@/cache';
+import { antennasCache, rolesCache, userListsCache } from '@/cache';
 
 export function getUserMenu(user: misskey.entities.UserDetailed, router: Router = mainRouter) {
 	const meId = $i ? $i.id : null;
@@ -137,6 +138,13 @@ export function getUserMenu(user: misskey.entities.UserDetailed, router: Router
 		action: () => {
 			copyToClipboard(`${user.host ?? host}/@${user.username}.atom`);
 		},
+	}, {
+		icon: 'ti ti-share',
+		text: i18n.ts.copyProfileUrl,
+		action: () => {
+			const canonical = user.host === null ? `@${user.username}` : `@${user.username}@${toUnicode(user.host)}`;
+			copyToClipboard(`${url}/${canonical}`);
+		},
 	}, {
 		icon: 'ti ti-mail',
 		text: i18n.ts.sendMessage,
@@ -158,11 +166,39 @@ export function getUserMenu(user: misskey.entities.UserDetailed, router: Router
 
 			return lists.map(list => ({
 				text: list.name,
-				action: () => {
-					os.apiWithDialog('users/lists/push', {
+				action: async () => {
+					await os.apiWithDialog('users/lists/push', {
 						listId: list.id,
 						userId: user.id,
 					});
+					userListsCache.delete();
+				},
+			}));
+		},
+	}, {
+		type: 'parent',
+		icon: 'ti ti-antenna',
+		text: i18n.ts.addToAntenna,
+		children: async () => {
+			const antennas = await antennasCache.fetch(() => os.api('antennas/list'));
+			const canonical = user.host === null ? `@${user.username}` : `@${user.username}@${toUnicode(user.host)}`;
+			return antennas.filter((a) => a.src === 'users').map(antenna => ({
+				text: antenna.name,
+				action: async () => {
+					await os.apiWithDialog('antennas/update', {
+						antennaId: antenna.id,
+						name: antenna.name,
+						keywords: antenna.keywords,
+						excludeKeywords: antenna.excludeKeywords,
+						src: antenna.src,
+						userListId: antenna.userListId,
+						users: [...antenna.users, canonical],
+						caseSensitive: antenna.caseSensitive,
+						withReplies: antenna.withReplies,
+						withFile: antenna.withFile,
+						notify: antenna.notify,
+					});
+					antennasCache.delete();
 				},
 			}));
 		},
diff --git a/packages/frontend/src/style.scss b/packages/frontend/src/style.scss
index b4b80a4bbe..bd74db7c85 100644
--- a/packages/frontend/src/style.scss
+++ b/packages/frontend/src/style.scss
@@ -72,7 +72,7 @@ html {
 	}
 
 	&.useSystemFont {
-		font-family: 'Hiragino Maru Gothic Pro', sans-serif;
+		font-family: system-ui;
 	}
 }
 
diff --git a/packages/sw/.eslintrc.js b/packages/sw/.eslintrc.cjs
similarity index 100%
rename from packages/sw/.eslintrc.js
rename to packages/sw/.eslintrc.cjs
diff --git a/packages/sw/build.js b/packages/sw/build.js
index ad16fb9497..e926197640 100644
--- a/packages/sw/build.js
+++ b/packages/sw/build.js
@@ -1,10 +1,13 @@
 // @ts-check
 
-const esbuild = require('esbuild');
-const locales = require('../../locales');
-const meta = require('../../package.json');
+import { fileURLToPath } from 'node:url';
+import * as esbuild from 'esbuild';
+import locales from '../../locales/index.js';
+import meta from '../../package.json' assert { type: "json" };
 const watch = process.argv[2]?.includes('watch');
 
+const __dirname = fileURLToPath(new URL('.', import.meta.url))
+
 console.log('Starting SW building...');
 
 /** @type {esbuild.BuildOptions} */
diff --git a/packages/sw/package.json b/packages/sw/package.json
index a2bead3dd4..a60f8230c2 100644
--- a/packages/sw/package.json
+++ b/packages/sw/package.json
@@ -19,5 +19,6 @@
 		"eslint": "8.44.0",
 		"eslint-plugin-import": "2.27.5",
 		"typescript": "5.1.6"
-	}
+	},
+	"type": "module"
 }
diff --git a/packages/sw/src/sw.ts b/packages/sw/src/sw.ts
index 2783f2bfb5..1f085c7392 100644
--- a/packages/sw/src/sw.ts
+++ b/packages/sw/src/sw.ts
@@ -21,6 +21,10 @@ globalThis.addEventListener('activate', ev => {
 	);
 });
 
+function offlineContentHTML(): string {
+	return `<!doctype html>Offline. Service Worker @${_VERSION_} <button onclick="location.reload()">reload</button>`
+}
+
 globalThis.addEventListener('fetch', ev => {
 	let isHTMLRequest = false;
 	if (ev.request.headers.get('sec-fetch-dest') === 'document') {
@@ -34,7 +38,14 @@ globalThis.addEventListener('fetch', ev => {
 	if (!isHTMLRequest) return;
 	ev.respondWith(
 		fetch(ev.request)
-			.catch(() => new Response(`Offline. Service Worker @${_VERSION_}`, { status: 200 })),
+			.catch(() => {
+				return new Response(offlineContentHTML(), {
+					status: 200,
+					headers: {
+						'content-type': 'text/html',
+					},
+				});
+			}),
 	);
 });