Merge branch 'develop' into release/2024.5.0

51 files changed, 774 insertions, 149 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c535fdf67b..553c75c85f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ### Note
 - コントロールパネル内にあるサマリープロキシの設定個所がセキュリティから全般へ変更となります。
 - 悪意のある第三者がリモートユーザーになりすましたアクティビティを受け取れてしまう問題を修正しました。詳しくは[GitHub security advisory](https://github.com/misskey-dev/misskey/security/advisories/GHSA-2vxv-pv3m-3wvj)をご覧ください。
+- 管理者向け権限 `read:admin:show-users` は `read:admin:show-user` に統合されました。必要に応じてAPIトークンを再発行してください。
 
 ### General
 - Enhance: URLプレビューの有効化・無効化を設定できるように #13569
@@ -15,12 +16,17 @@
   - サスペンド済みユーザーか
   - 鍵アカウントユーザーか
   - 「アカウントを見つけやすくする」が有効なユーザーか
+- Enhance: Goneを出さずに終了したサーバーへの配信停止を自動的に行うように
+  - もしそのようなサーバーからから配信が届いた場合には自動的に配信を再開します
+- Enhance: 配信停止の理由を表示するように
 - Fix: Play作成時に設定した公開範囲が機能していない問題を修正
 - Fix: 正規化されていない状態のhashtagが連合されてきたhtmlに含まれているとhashtagが正しくhashtagに復元されない問題を修正
 - Fix: みつけるのアンケート欄にてチャンネルのアンケートが含まれてしまう問題を修正
 
 ### Client
 - Feat: アップロードするファイルの名前をランダム文字列にできるように
+- Feat: 個別のお知らせにリンクで飛べるように  
+  (Cherry-picked from https://github.com/MisskeyIO/misskey)
 - Enhance: 自分のノートの添付ファイルから直接ファイルの詳細ページに飛べるように
 - Enhance: 広告がMisskeyと同一ドメインの場合はRouterで遷移するように
 - Enhance: リアクション・いいねの総数を表示するように
@@ -43,6 +49,8 @@
 - Enhance: AiScriptを0.18.0にバージョンアップ
 - Enhance: 通常のノートでも、お気に入りに登録したチャンネルにリノートできるように
 - Enhance: 長いテキストをペーストした際にテキストファイルとして添付するかどうかを選択できるように
+- Enhance: コントロールパネルのクイックアクションからファイルを照会できるように
+- Enhance: コントロールパネルのクイックアクションから通常の照会を行えるように
 - Fix: 一部のページ内リンクが正しく動作しない問題を修正
 - Fix: 周年の実績が閏年を考慮しない問題を修正
 - Fix: ローカルURLのプレビューポップアップが左上に表示される
diff --git a/healthcheck.sh b/healthcheck.sh
index d6d416c7a1..dcfcf76786 100644
--- a/healthcheck.sh
+++ b/healthcheck.sh
@@ -4,4 +4,4 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 PORT=$(grep '^port:' /misskey/.config/default.yml | awk 'NR==1{print $2; exit}')
-curl -s -S -o /dev/null "http://localhost:${PORT}"
+curl -Sfso/dev/null "http://localhost:${PORT}/healthz"
diff --git a/locales/index.d.ts b/locales/index.d.ts
index d5d6ef0f34..eb7e297aa3 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -4113,10 +4113,14 @@ export interface Locale extends ILocale {
      */
     "thisPostMayBeAnnoyingIgnore": string;
     /**
-     * 見たことのあるリノートを省略して表示
+     * リノートのスマート省略
      */
     "collapseRenotes": string;
     /**
+     * リアクションやリノートをしたことがあるノートをたたんで表示します。
+     */
+    "collapseRenotesDescription": string;
+    /**
      * サーバー内部エラー
      */
     "internalServerError": string;
@@ -4972,6 +4976,38 @@ export interface Locale extends ILocale {
      * お問い合わせ
      */
     "inquiry": string;
+    "_delivery": {
+        /**
+         * 配信状態
+         */
+        "status": string;
+        /**
+         * 配信停止
+         */
+        "stop": string;
+        /**
+         * 配信再開
+         */
+        "resume": string;
+        "_type": {
+            /**
+             * 配信中
+             */
+            "none": string;
+            /**
+             * 手動停止中
+             */
+            "manuallySuspended": string;
+            /**
+             * サーバー削除のため停止中
+             */
+            "goneSuspended": string;
+            /**
+             * サーバー応答なしのため停止中
+             */
+            "autoSuspendedForNotResponding": string;
+        };
+    };
     "_bubbleGame": {
         /**
          * 遊び方
@@ -7904,10 +7940,6 @@ export interface Locale extends ILocale {
          */
         "read:admin:show-user": string;
         /**
-         * ユーザーのプライベートな情報を見る
-         */
-        "read:admin:show-users": string;
-        /**
          * ユーザーを凍結する
          */
         "write:admin:suspend-user": string;
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 9aa1e6e6a0..ebaf16745c 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1024,7 +1024,8 @@ thisPostMayBeAnnoying: "この投稿は迷惑になる可能性があります�
 thisPostMayBeAnnoyingHome: "ホームに投稿"
 thisPostMayBeAnnoyingCancel: "やめる"
 thisPostMayBeAnnoyingIgnore: "このまま投稿"
-collapseRenotes: "見たことのあるリノートを省略して表示"
+collapseRenotes: "リノートのスマート省略"
+collapseRenotesDescription: "リアクションやリノートをしたことがあるノートをたたんで表示します。"
 internalServerError: "サーバー内部エラー"
 internalServerErrorDescription: "サーバー内部で予期しないエラーが発生しました。"
 copyErrorInfo: "エラー情報をコピー"
@@ -1240,6 +1241,16 @@ noDescription: "説明文はありません"
 alwaysConfirmFollow: "フォローの際常に確認する"
 inquiry: "お問い合わせ"
 
+_delivery:
+  status: "配信状態"
+  stop: "配信停止"
+  resume: "配信再開"
+  _type:
+    none: "配信中"
+    manuallySuspended: "手動停止中"
+    goneSuspended: "サーバー削除のため停止中"
+    autoSuspendedForNotResponding: "サーバー応答なしのため停止中"
+
 _bubbleGame:
   howToPlay: "遊び方"
   hold: "ホールド"
@@ -2075,7 +2086,6 @@ _permissions:
   "read:admin:server-info": "サーバーの情報を見る"
   "read:admin:show-moderation-log": "モデレーションログを見る"
   "read:admin:show-user": "ユーザーのプライベートな情報を見る"
-  "read:admin:show-users": "ユーザーのプライベートな情報を見る"
   "write:admin:suspend-user": "ユーザーを凍結する"
   "write:admin:unset-user-avatar": "ユーザーのアバターを削除する"
   "write:admin:unset-user-banner": "ユーザーのバーナーを削除する"
diff --git a/packages/backend/migration/1716345015347-NotRespondingSince.js b/packages/backend/migration/1716345015347-NotRespondingSince.js
new file mode 100644
index 0000000000..fc4ee6639a
--- /dev/null
+++ b/packages/backend/migration/1716345015347-NotRespondingSince.js
@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class NotRespondingSince1716345015347 {
+    name = 'NotRespondingSince1716345015347'
+
+    async up(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "instance" ADD "notRespondingSince" TIMESTAMP WITH TIME ZONE`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "instance" DROP COLUMN "notRespondingSince"`);
+    }
+}
diff --git a/packages/backend/migration/1716447138870-SuspensionStateInsteadOfIsSspended.js b/packages/backend/migration/1716447138870-SuspensionStateInsteadOfIsSspended.js
new file mode 100644
index 0000000000..4808a9a3db
--- /dev/null
+++ b/packages/backend/migration/1716447138870-SuspensionStateInsteadOfIsSspended.js
@@ -0,0 +1,50 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class SuspensionStateInsteadOfIsSspended1716345771510 {
+    name = 'SuspensionStateInsteadOfIsSspended1716345771510'
+
+    async up(queryRunner) {
+        await queryRunner.query(`CREATE TYPE "public"."instance_suspensionstate_enum" AS ENUM('none', 'manuallySuspended', 'goneSuspended', 'autoSuspendedForNotResponding')`);
+
+        await queryRunner.query(`DROP INDEX "public"."IDX_34500da2e38ac393f7bb6b299c"`);
+
+        await queryRunner.query(`ALTER TABLE "instance" RENAME COLUMN "isSuspended" TO "suspensionState"`);
+
+        await queryRunner.query(`ALTER TABLE "instance" ALTER COLUMN "suspensionState" DROP DEFAULT`);
+
+        await queryRunner.query(`ALTER TABLE "instance" ALTER COLUMN "suspensionState" TYPE "public"."instance_suspensionstate_enum" USING (
+            CASE "suspensionState"
+               WHEN TRUE THEN 'manuallySuspended'::instance_suspensionstate_enum
+               ELSE 'none'::instance_suspensionstate_enum
+            END
+        )`);
+
+        await queryRunner.query(`ALTER TABLE "instance" ALTER COLUMN "suspensionState" SET DEFAULT 'none'`);
+
+        await queryRunner.query(`CREATE INDEX "IDX_3ede46f507c87ad698051d56a8" ON "instance" ("suspensionState") `);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`DROP INDEX "public"."IDX_3ede46f507c87ad698051d56a8"`);
+
+        await queryRunner.query(`ALTER TABLE "instance" ALTER COLUMN "suspensionState" DROP DEFAULT`);
+
+        await queryRunner.query(`ALTER TABLE "instance" ALTER COLUMN "suspensionState" TYPE boolean USING (
+            CASE "suspensionState"
+               WHEN 'none'::instance_suspensionstate_enum THEN FALSE
+               ELSE TRUE
+            END
+        )`);
+
+        await queryRunner.query(`ALTER TABLE "instance" ALTER COLUMN "suspensionState" SET DEFAULT false`);
+
+        await queryRunner.query(`ALTER TABLE "instance" RENAME COLUMN "suspensionState" TO "isSuspended"`);
+
+        await queryRunner.query(`CREATE INDEX "IDX_34500da2e38ac393f7bb6b299c" ON "instance" ("isSuspended") `);
+
+        await queryRunner.query(`DROP TYPE "public"."instance_suspensionstate_enum"`);
+    }
+}
diff --git a/packages/backend/src/boot/entry.ts b/packages/backend/src/boot/entry.ts
index 6b8e83d4f9..04c6ca9723 100644
--- a/packages/backend/src/boot/entry.ts
+++ b/packages/backend/src/boot/entry.ts
@@ -15,6 +15,7 @@ import Logger from '@/logger.js';
 import { envOption } from '../env.js';
 import { masterMain } from './master.js';
 import { workerMain } from './worker.js';
+import { readyRef } from './ready.js';
 
 import 'reflect-metadata';
 
@@ -79,6 +80,8 @@ if (cluster.isWorker || envOption.disableClustering) {
 	await workerMain();
 }
 
+readyRef.value = true;
+
 // ユニットテスト時にMisskeyが子プロセスで起動された時のため
 // それ以外のときは process.send は使えないので弾く
 if (process.send) {
diff --git a/packages/backend/src/boot/ready.ts b/packages/backend/src/boot/ready.ts
new file mode 100644
index 0000000000..591ae5cb58
--- /dev/null
+++ b/packages/backend/src/boot/ready.ts
@@ -0,0 +1,6 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export const readyRef = { value: false };
diff --git a/packages/backend/src/core/AnnouncementService.ts b/packages/backend/src/core/AnnouncementService.ts
index b298a70929..9b60df2cae 100644
--- a/packages/backend/src/core/AnnouncementService.ts
+++ b/packages/backend/src/core/AnnouncementService.ts
@@ -4,13 +4,14 @@
  */
 
 import { Inject, Injectable } from '@nestjs/common';
-import { Brackets } from 'typeorm';
+import { Brackets, EntityNotFoundError } from 'typeorm';
 import { DI } from '@/di-symbols.js';
 import type { MiUser } from '@/models/User.js';
 import type { AnnouncementReadsRepository, AnnouncementsRepository, MiAnnouncement, MiAnnouncementRead, UsersRepository } from '@/models/_.js';
 import { bindThis } from '@/decorators.js';
 import { Packed } from '@/misc/json-schema.js';
 import { IdService } from '@/core/IdService.js';
+import { AnnouncementEntityService } from '@/core/entities/AnnouncementEntityService.js';
 import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { ModerationLogService } from '@/core/ModerationLogService.js';
 
@@ -29,6 +30,7 @@ export class AnnouncementService {
 		private idService: IdService,
 		private globalEventService: GlobalEventService,
 		private moderationLogService: ModerationLogService,
+		private announcementEntityService: AnnouncementEntityService,
 	) {
 	}
 
@@ -79,7 +81,7 @@ export class AnnouncementService {
 			userId: values.userId,
 		}).then(x => this.announcementsRepository.findOneByOrFail(x.identifiers[0]));
 
-		const packed = (await this.packMany([announcement]))[0];
+		const packed = await this.announcementEntityService.pack(announcement);
 
 		if (values.userId) {
 			this.globalEventService.publishMainStream(values.userId, 'announcementCreated', {
@@ -178,6 +180,24 @@ export class AnnouncementService {
 	}
 
 	@bindThis
+	public async getAnnouncement(announcementId: MiAnnouncement['id'], me: MiUser | null): Promise<Packed<'Announcement'>> {
+		const announcement = await this.announcementsRepository.findOneByOrFail({ id: announcementId });
+		if (me) {
+			if (announcement.userId && announcement.userId !== me.id) {
+				throw new EntityNotFoundError(this.announcementsRepository.metadata.target, { id: announcementId });
+			}
+
+			const read = await this.announcementReadsRepository.findOneBy({
+				announcementId: announcement.id,
+				userId: me.id,
+			});
+			return this.announcementEntityService.pack({ ...announcement, isRead: read !== null }, me);
+		} else {
+			return this.announcementEntityService.pack(announcement, null);
+		}
+	}
+
+	@bindThis
 	public async read(user: MiUser, announcementId: MiAnnouncement['id']): Promise<void> {
 		try {
 			await this.announcementReadsRepository.insert({
@@ -193,29 +213,4 @@ export class AnnouncementService {
 			this.globalEventService.publishMainStream(user.id, 'readAllAnnouncements');
 		}
 	}
-
-	@bindThis
-	public async packMany(
-		announcements: MiAnnouncement[],
-		me?: { id: MiUser['id'] } | null | undefined,
-		options?: {
-			reads?: MiAnnouncementRead[];
-		},
-	): Promise<Packed<'Announcement'>[]> {
-		const reads = me ? (options?.reads ?? await this.getReads(me.id)) : [];
-		return announcements.map(announcement => ({
-			id: announcement.id,
-			createdAt: this.idService.parse(announcement.id).date.toISOString(),
-			updatedAt: announcement.updatedAt?.toISOString() ?? null,
-			text: announcement.text,
-			title: announcement.title,
-			imageUrl: announcement.imageUrl,
-			icon: announcement.icon,
-			display: announcement.display,
-			needConfirmationToRead: announcement.needConfirmationToRead,
-			silence: announcement.silence,
-			forYou: announcement.userId === me?.id,
-			isRead: reads.some(read => read.announcementId === announcement.id),
-		}));
-	}
 }
diff --git a/packages/backend/src/core/CoreModule.ts b/packages/backend/src/core/CoreModule.ts
index 5953155872..be80df6f1c 100644
--- a/packages/backend/src/core/CoreModule.ts
+++ b/packages/backend/src/core/CoreModule.ts
@@ -84,6 +84,7 @@ import ApRequestChart from './chart/charts/ap-request.js';
 import { ChartManagementService } from './chart/ChartManagementService.js';
 
 import { AbuseUserReportEntityService } from './entities/AbuseUserReportEntityService.js';
+import { AnnouncementEntityService } from './entities/AnnouncementEntityService.js';
 import { AntennaEntityService } from './entities/AntennaEntityService.js';
 import { AppEntityService } from './entities/AppEntityService.js';
 import { AuthSessionEntityService } from './entities/AuthSessionEntityService.js';
@@ -223,6 +224,7 @@ const $ApRequestChart: Provider = { provide: 'ApRequestChart', useExisting: ApRe
 const $ChartManagementService: Provider = { provide: 'ChartManagementService', useExisting: ChartManagementService };
 
 const $AbuseUserReportEntityService: Provider = { provide: 'AbuseUserReportEntityService', useExisting: AbuseUserReportEntityService };
+const $AnnouncementEntityService: Provider = { provide: 'AnnouncementEntityService', useExisting: AnnouncementEntityService };
 const $AntennaEntityService: Provider = { provide: 'AntennaEntityService', useExisting: AntennaEntityService };
 const $AppEntityService: Provider = { provide: 'AppEntityService', useExisting: AppEntityService };
 const $AuthSessionEntityService: Provider = { provide: 'AuthSessionEntityService', useExisting: AuthSessionEntityService };
@@ -363,6 +365,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		ChartManagementService,
 
 		AbuseUserReportEntityService,
+		AnnouncementEntityService,
 		AntennaEntityService,
 		AppEntityService,
 		AuthSessionEntityService,
@@ -499,6 +502,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$ChartManagementService,
 
 		$AbuseUserReportEntityService,
+		$AnnouncementEntityService,
 		$AntennaEntityService,
 		$AppEntityService,
 		$AuthSessionEntityService,
@@ -635,6 +639,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		ChartManagementService,
 
 		AbuseUserReportEntityService,
+		AnnouncementEntityService,
 		AntennaEntityService,
 		AppEntityService,
 		AuthSessionEntityService,
@@ -770,6 +775,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$ChartManagementService,
 
 		$AbuseUserReportEntityService,
+		$AnnouncementEntityService,
 		$AntennaEntityService,
 		$AppEntityService,
 		$AuthSessionEntityService,
diff --git a/packages/backend/src/core/entities/AnnouncementEntityService.ts b/packages/backend/src/core/entities/AnnouncementEntityService.ts
new file mode 100644
index 0000000000..90b04d0229
--- /dev/null
+++ b/packages/backend/src/core/entities/AnnouncementEntityService.ts
@@ -0,0 +1,71 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import { DI } from '@/di-symbols.js';
+import type { AnnouncementsRepository, AnnouncementReadsRepository, MiAnnouncement, MiUser } from '@/models/_.js';
+import type { Packed } from '@/misc/json-schema.js';
+import { bindThis } from '@/decorators.js';
+import { IdService } from '@/core/IdService.js';
+
+@Injectable()
+export class AnnouncementEntityService {
+	constructor(
+		@Inject(DI.announcementsRepository)
+		private announcementsRepository: AnnouncementsRepository,
+
+		@Inject(DI.announcementReadsRepository)
+		private announcementReadsRepository: AnnouncementReadsRepository,
+
+		private idService: IdService,
+	) {
+	}
+
+	@bindThis
+	public async pack(
+		src: MiAnnouncement['id'] | MiAnnouncement & { isRead?: boolean | null },
+		me?: { id: MiUser['id'] } | null | undefined,
+	): Promise<Packed<'Announcement'>> {
+		const announcement = typeof src === 'object'
+			? src
+			: await this.announcementsRepository.findOneByOrFail({
+				id: src,
+			}) as MiAnnouncement & { isRead?: boolean | null };
+
+		if (me && announcement.isRead === undefined) {
+			announcement.isRead = await this.announcementReadsRepository
+				.countBy({
+					announcementId: announcement.id,
+					userId: me.id,
+				})
+				.then((count: number) => count > 0);
+		}
+
+		return {
+			id: announcement.id,
+			createdAt: this.idService.parse(announcement.id).date.toISOString(),
+			updatedAt: announcement.updatedAt?.toISOString() ?? null,
+			title: announcement.title,
+			text: announcement.text,
+			imageUrl: announcement.imageUrl,
+			icon: announcement.icon,
+			display: announcement.display,
+			forYou: announcement.userId === me?.id,
+			needConfirmationToRead: announcement.needConfirmationToRead,
+			silence: announcement.silence,
+			isRead: announcement.isRead !== null ? announcement.isRead : undefined,
+		};
+	}
+
+	@bindThis
+	public async packMany(
+		announcements: (MiAnnouncement['id'] | MiAnnouncement & { isRead?: boolean | null } | MiAnnouncement)[],
+		me?: { id: MiUser['id'] } | null | undefined,
+	) : Promise<Packed<'Announcement'>[]> {
+		return (await Promise.allSettled(announcements.map(x => this.pack(x, me))))
+			.filter(result => result.status === 'fulfilled')
+			.map(result => (result as PromiseFulfilledResult<Packed<'Announcement'>>).value);
+	}
+}
diff --git a/packages/backend/src/core/entities/InstanceEntityService.ts b/packages/backend/src/core/entities/InstanceEntityService.ts
index e46bd8b963..9117b13914 100644
--- a/packages/backend/src/core/entities/InstanceEntityService.ts
+++ b/packages/backend/src/core/entities/InstanceEntityService.ts
@@ -39,7 +39,8 @@ export class InstanceEntityService {
 			followingCount: instance.followingCount,
 			followersCount: instance.followersCount,
 			isNotResponding: instance.isNotResponding,
-			isSuspended: instance.isSuspended,
+			isSuspended: instance.suspensionState !== 'none',
+			suspensionState: instance.suspensionState,
 			isBlocked: this.utilityService.isBlockedHost(meta.blockedHosts, instance.host),
 			softwareName: instance.softwareName,
 			softwareVersion: instance.softwareVersion,
diff --git a/packages/backend/src/models/Instance.ts b/packages/backend/src/models/Instance.ts
index 9863c9d75d..17cd5c6665 100644
--- a/packages/backend/src/models/Instance.ts
+++ b/packages/backend/src/models/Instance.ts
@@ -81,13 +81,22 @@ export class MiInstance {
 	public isNotResponding: boolean;
 
 	/**
-	 * このインスタンスへの配信を停止するか
+	 * このインスタンスと不通になった日時
+	 */
+	@Column('timestamp with time zone', {
+		nullable: true,
+	})
+	public notRespondingSince: Date | null;
+
+	/**
+	 * このインスタンスへの配信状態
 	 */
 	@Index()
-	@Column('boolean', {
-		default: false,
+	@Column('enum', {
+		default: 'none',
+		enum: ['none', 'manuallySuspended', 'goneSuspended', 'autoSuspendedForNotResponding'],
 	})
-	public isSuspended: boolean;
+	public suspensionState: 'none' | 'manuallySuspended' | 'goneSuspended' | 'autoSuspendedForNotResponding';
 
 	@Column('varchar', {
 		length: 64, nullable: true,
diff --git a/packages/backend/src/models/json-schema/federation-instance.ts b/packages/backend/src/models/json-schema/federation-instance.ts
index 42d98fe523..ed40d405c6 100644
--- a/packages/backend/src/models/json-schema/federation-instance.ts
+++ b/packages/backend/src/models/json-schema/federation-instance.ts
@@ -45,6 +45,11 @@ export const packedFederationInstanceSchema = {
 			type: 'boolean',
 			optional: false, nullable: false,
 		},
+		suspensionState: {
+			type: 'string',
+			nullable: false, optional: false,
+			enum: ['none', 'manuallySuspended', 'goneSuspended', 'autoSuspendedForNotResponding'],
+		},
 		isBlocked: {
 			type: 'boolean',
 			optional: false, nullable: false,
diff --git a/packages/backend/src/queue/processors/DeliverProcessorService.ts b/packages/backend/src/queue/processors/DeliverProcessorService.ts
index 5fed070929..b73195afc3 100644
--- a/packages/backend/src/queue/processors/DeliverProcessorService.ts
+++ b/packages/backend/src/queue/processors/DeliverProcessorService.ts
@@ -5,6 +5,7 @@
 
 import { Inject, Injectable } from '@nestjs/common';
 import * as Bull from 'bullmq';
+import { Not } from 'typeorm';
 import { DI } from '@/di-symbols.js';
 import type { InstancesRepository } from '@/models/_.js';
 import type Logger from '@/logger.js';
@@ -62,7 +63,7 @@ export class DeliverProcessorService {
 		if (suspendedHosts == null) {
 			suspendedHosts = await this.instancesRepository.find({
 				where: {
-					isSuspended: true,
+					suspensionState: Not('none'),
 				},
 			});
 			this.suspendedHostsCache.set(suspendedHosts);
@@ -79,6 +80,7 @@ export class DeliverProcessorService {
 				if (i.isNotResponding) {
 					this.federatedInstanceService.update(i.id, {
 						isNotResponding: false,
+						notRespondingSince: null,
 					});
 				}
 
@@ -98,7 +100,15 @@ export class DeliverProcessorService {
 				if (!i.isNotResponding) {
 					this.federatedInstanceService.update(i.id, {
 						isNotResponding: true,
+						notRespondingSince: new Date(),
 					});
+				} else if (i.notRespondingSince) {
+					// 1週間以上不通ならサスペンド
+					if (i.suspensionState === 'none' && i.notRespondingSince.getTime() <= Date.now() - 1000 * 60 * 60 * 24 * 7) {
+						this.federatedInstanceService.update(i.id, {
+							suspensionState: 'autoSuspendedForNotResponding',
+						});
+					}
 				}
 
 				this.apRequestChart.deliverFail();
@@ -116,7 +126,7 @@ export class DeliverProcessorService {
 					if (job.data.isSharedInbox && res.statusCode === 410) {
 						this.federatedInstanceService.fetch(host).then(i => {
 							this.federatedInstanceService.update(i.id, {
-								isSuspended: true,
+								suspensionState: 'goneSuspended',
 							});
 						});
 						throw new Bull.UnrecoverableError(`${host} is gone`);
diff --git a/packages/backend/src/queue/processors/InboxProcessorService.ts b/packages/backend/src/queue/processors/InboxProcessorService.ts
index 1d05f4ade1..f465339075 100644
--- a/packages/backend/src/queue/processors/InboxProcessorService.ts
+++ b/packages/backend/src/queue/processors/InboxProcessorService.ts
@@ -188,6 +188,8 @@ export class InboxProcessorService {
 			this.federatedInstanceService.update(i.id, {
 				latestRequestReceivedAt: new Date(),
 				isNotResponding: false,
+				// もしサーバーが死んでるために配信が止まっていた場合には自動的に復活させてあげる
+				suspensionState: i.suspensionState === 'autoSuspendedForNotResponding' ? 'none' : undefined,
 			});
 
 			this.fetchInstanceMetadataService.fetchInstanceMetadata(i);
diff --git a/packages/backend/src/server/HealthServerService.ts b/packages/backend/src/server/HealthServerService.ts
new file mode 100644
index 0000000000..2c3ed85925
--- /dev/null
+++ b/packages/backend/src/server/HealthServerService.ts
@@ -0,0 +1,54 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import * as Redis from 'ioredis';
+import { DataSource } from 'typeorm';
+import { bindThis } from '@/decorators.js';
+import { DI } from '@/di-symbols.js';
+import { readyRef } from '@/boot/ready.js';
+import type { FastifyInstance, FastifyPluginOptions } from 'fastify';
+import type { MeiliSearch } from 'meilisearch';
+
+@Injectable()
+export class HealthServerService {
+	constructor(
+		@Inject(DI.redis)
+		private redis: Redis.Redis,
+
+		@Inject(DI.redisForPub)
+		private redisForPub: Redis.Redis,
+
+		@Inject(DI.redisForSub)
+		private redisForSub: Redis.Redis,
+
+		@Inject(DI.redisForTimelines)
+		private redisForTimelines: Redis.Redis,
+
+		@Inject(DI.db)
+		private db: DataSource,
+
+		@Inject(DI.meilisearch)
+		private meilisearch: MeiliSearch | null,
+	) {}
+
+	@bindThis
+	public createServer(fastify: FastifyInstance, options: FastifyPluginOptions, done: (err?: Error) => void) {
+		fastify.get('/', async (request, reply) => {
+			reply.code(await Promise.all([
+				new Promise<void>((resolve, reject) => readyRef.value ? resolve() : reject()),
+				this.redis.ping(),
+				this.redisForPub.ping(),
+				this.redisForSub.ping(),
+				this.redisForTimelines.ping(),
+				this.db.query('SELECT 1'),
+				...(this.meilisearch ? [this.meilisearch.health()] : []),
+			]).then(() => 200, () => 503));
+			reply.header('Cache-Control', 'no-store');
+		});
+
+		done();
+	}
+}
diff --git a/packages/backend/src/server/ServerModule.ts b/packages/backend/src/server/ServerModule.ts
index f43968d236..12d5061985 100644
--- a/packages/backend/src/server/ServerModule.ts
+++ b/packages/backend/src/server/ServerModule.ts
@@ -8,6 +8,7 @@ import { EndpointsModule } from '@/server/api/EndpointsModule.js';
 import { CoreModule } from '@/core/CoreModule.js';
 import { ApiCallService } from './api/ApiCallService.js';
 import { FileServerService } from './FileServerService.js';
+import { HealthServerService } from './HealthServerService.js';
 import { NodeinfoServerService } from './NodeinfoServerService.js';
 import { ServerService } from './ServerService.js';
 import { WellKnownServerService } from './WellKnownServerService.js';
@@ -55,6 +56,7 @@ import { ReversiGameChannelService } from './api/stream/channels/reversi-game.js
 		ClientServerService,
 		ClientLoggerService,
 		FeedService,
+		HealthServerService,
 		UrlPreviewService,
 		ActivityPubServerService,
 		FileServerService,
diff --git a/packages/backend/src/server/ServerService.ts b/packages/backend/src/server/ServerService.ts
index da17a88e03..3572f16627 100644
--- a/packages/backend/src/server/ServerService.ts
+++ b/packages/backend/src/server/ServerService.ts
@@ -28,6 +28,7 @@ import { ApiServerService } from './api/ApiServerService.js';
 import { StreamingApiServerService } from './api/StreamingApiServerService.js';
 import { WellKnownServerService } from './WellKnownServerService.js';
 import { FileServerService } from './FileServerService.js';
+import { HealthServerService } from './HealthServerService.js';
 import { ClientServerService } from './web/ClientServerService.js';
 import { OpenApiServerService } from './api/openapi/OpenApiServerService.js';
 import { OAuth2ProviderService } from './oauth/OAuth2ProviderService.js';
@@ -61,6 +62,7 @@ export class ServerService implements OnApplicationShutdown {
 		private wellKnownServerService: WellKnownServerService,
 		private nodeinfoServerService: NodeinfoServerService,
 		private fileServerService: FileServerService,
+		private healthServerService: HealthServerService,
 		private clientServerService: ClientServerService,
 		private globalEventService: GlobalEventService,
 		private loggerService: LoggerService,
@@ -108,6 +110,7 @@ export class ServerService implements OnApplicationShutdown {
 		fastify.register(this.wellKnownServerService.createServer);
 		fastify.register(this.oauth2ProviderService.createServer, { prefix: '/oauth' });
 		fastify.register(this.oauth2ProviderService.createTokenServer, { prefix: '/oauth/token' });
+		fastify.register(this.healthServerService.createServer, { prefix: '/healthz' });
 
 		fastify.get<{ Params: { path: string }; Querystring: { static?: any; badge?: any; }; }>('/emoji/:path(.*)', async (request, reply) => {
 			const path = request.params.path;
diff --git a/packages/backend/src/server/api/ApiServerService.ts b/packages/backend/src/server/api/ApiServerService.ts
index e99244cdd0..4a5935f930 100644
--- a/packages/backend/src/server/api/ApiServerService.ts
+++ b/packages/backend/src/server/api/ApiServerService.ts
@@ -137,7 +137,7 @@ export class ApiServerService {
 			const instances = await this.instancesRepository.find({
 				select: ['host'],
 				where: {
-					isSuspended: false,
+					suspensionState: 'none',
 				},
 			});
 
diff --git a/packages/backend/src/server/api/EndpointsModule.ts b/packages/backend/src/server/api/EndpointsModule.ts
index 88d3999eb0..c645f4bcc6 100644
--- a/packages/backend/src/server/api/EndpointsModule.ts
+++ b/packages/backend/src/server/api/EndpointsModule.ts
@@ -83,6 +83,7 @@ import * as ep___admin_roles_unassign from './endpoints/admin/roles/unassign.js'
 import * as ep___admin_roles_updateDefaultPolicies from './endpoints/admin/roles/update-default-policies.js';
 import * as ep___admin_roles_users from './endpoints/admin/roles/users.js';
 import * as ep___announcements from './endpoints/announcements.js';
+import * as ep___announcements_show from './endpoints/announcements/show.js';
 import * as ep___antennas_create from './endpoints/antennas/create.js';
 import * as ep___antennas_delete from './endpoints/antennas/delete.js';
 import * as ep___antennas_list from './endpoints/antennas/list.js';
@@ -455,6 +456,7 @@ const $admin_roles_unassign: Provider = { provide: 'ep:admin/roles/unassign', us
 const $admin_roles_updateDefaultPolicies: Provider = { provide: 'ep:admin/roles/update-default-policies', useClass: ep___admin_roles_updateDefaultPolicies.default };
 const $admin_roles_users: Provider = { provide: 'ep:admin/roles/users', useClass: ep___admin_roles_users.default };
 const $announcements: Provider = { provide: 'ep:announcements', useClass: ep___announcements.default };
+const $announcements_show: Provider = { provide: 'ep:announcements/show', useClass: ep___announcements_show.default };
 const $antennas_create: Provider = { provide: 'ep:antennas/create', useClass: ep___antennas_create.default };
 const $antennas_delete: Provider = { provide: 'ep:antennas/delete', useClass: ep___antennas_delete.default };
 const $antennas_list: Provider = { provide: 'ep:antennas/list', useClass: ep___antennas_list.default };
@@ -831,6 +833,7 @@ const $reversi_verify: Provider = { provide: 'ep:reversi/verify', useClass: ep__
 		$admin_roles_updateDefaultPolicies,
 		$admin_roles_users,
 		$announcements,
+		$announcements_show,
 		$antennas_create,
 		$antennas_delete,
 		$antennas_list,
@@ -1201,6 +1204,7 @@ const $reversi_verify: Provider = { provide: 'ep:reversi/verify', useClass: ep__
 		$admin_roles_updateDefaultPolicies,
 		$admin_roles_users,
 		$announcements,
+		$announcements_show,
 		$antennas_create,
 		$antennas_delete,
 		$antennas_list,
diff --git a/packages/backend/src/server/api/endpoints.ts b/packages/backend/src/server/api/endpoints.ts
index f7e64a7356..a38c62f35a 100644
--- a/packages/backend/src/server/api/endpoints.ts
+++ b/packages/backend/src/server/api/endpoints.ts
@@ -83,6 +83,7 @@ import * as ep___admin_roles_unassign from './endpoints/admin/roles/unassign.js'
 import * as ep___admin_roles_updateDefaultPolicies from './endpoints/admin/roles/update-default-policies.js';
 import * as ep___admin_roles_users from './endpoints/admin/roles/users.js';
 import * as ep___announcements from './endpoints/announcements.js';
+import * as ep___announcements_show from './endpoints/announcements/show.js';
 import * as ep___antennas_create from './endpoints/antennas/create.js';
 import * as ep___antennas_delete from './endpoints/antennas/delete.js';
 import * as ep___antennas_list from './endpoints/antennas/list.js';
@@ -453,6 +454,7 @@ const eps = [
 	['admin/roles/update-default-policies', ep___admin_roles_updateDefaultPolicies],
 	['admin/roles/users', ep___admin_roles_users],
 	['announcements', ep___announcements],
+	['announcements/show', ep___announcements_show],
 	['antennas/create', ep___antennas_create],
 	['antennas/delete', ep___antennas_delete],
 	['antennas/list', ep___antennas_list],
diff --git a/packages/backend/src/server/api/endpoints/admin/federation/update-instance.ts b/packages/backend/src/server/api/endpoints/admin/federation/update-instance.ts
index 0bcdc2a4b8..fed7bfbbde 100644
--- a/packages/backend/src/server/api/endpoints/admin/federation/update-instance.ts
+++ b/packages/backend/src/server/api/endpoints/admin/federation/update-instance.ts
@@ -46,12 +46,19 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				throw new Error('instance not found');
 			}
 
+			const isSuspendedBefore = instance.suspensionState !== 'none';
+			let suspensionState: undefined | 'manuallySuspended' | 'none';
+
+			if (ps.isSuspended != null && isSuspendedBefore !== ps.isSuspended) {
+				suspensionState = ps.isSuspended ? 'manuallySuspended' : 'none';
+			}
+
 			await this.federatedInstanceService.update(instance.id, {
-				isSuspended: ps.isSuspended,
+				suspensionState,
 				moderationNote: ps.moderationNote,
 			});
 
-			if (ps.isSuspended != null && instance.isSuspended !== ps.isSuspended) {
+			if (ps.isSuspended != null && isSuspendedBefore !== ps.isSuspended) {
 				if (ps.isSuspended) {
 					this.moderationLogService.log(me, 'suspendRemoteInstance', {
 						id: instance.id,
diff --git a/packages/backend/src/server/api/endpoints/admin/show-users.ts b/packages/backend/src/server/api/endpoints/admin/show-users.ts
index 424212ba24..2fef9abbf9 100644
--- a/packages/backend/src/server/api/endpoints/admin/show-users.ts
+++ b/packages/backend/src/server/api/endpoints/admin/show-users.ts
@@ -16,7 +16,7 @@ export const meta = {
 
 	requireCredential: true,
 	requireModerator: true,
-	kind: 'read:admin:show-users',
+	kind: 'read:admin:show-user',
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/announcements.ts b/packages/backend/src/server/api/endpoints/announcements.ts
index 3b12f5b62c..ff8dd73605 100644
--- a/packages/backend/src/server/api/endpoints/announcements.ts
+++ b/packages/backend/src/server/api/endpoints/announcements.ts
@@ -7,9 +7,9 @@ import { Inject, Injectable } from '@nestjs/common';
 import { Brackets } from 'typeorm';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { QueryService } from '@/core/QueryService.js';
-import { AnnouncementService } from '@/core/AnnouncementService.js';
+import { AnnouncementEntityService } from '@/core/entities/AnnouncementEntityService.js';
 import { DI } from '@/di-symbols.js';
-import type { AnnouncementReadsRepository, AnnouncementsRepository } from '@/models/_.js';
+import type { AnnouncementsRepository } from '@/models/_.js';
 
 export const meta = {
 	tags: ['meta'],
@@ -44,11 +44,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		@Inject(DI.announcementsRepository)
 		private announcementsRepository: AnnouncementsRepository,
 
-		@Inject(DI.announcementReadsRepository)
-		private announcementReadsRepository: AnnouncementReadsRepository,
-
 		private queryService: QueryService,
-		private announcementService: AnnouncementService,
+		private announcementEntityService: AnnouncementEntityService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const query = this.queryService.makePaginationQuery(this.announcementsRepository.createQueryBuilder('announcement'), ps.sinceId, ps.untilId)
@@ -60,7 +57,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 			const announcements = await query.limit(ps.limit).getMany();
 
-			return this.announcementService.packMany(announcements, me);
+			return this.announcementEntityService.packMany(announcements, me);
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/endpoints/announcements/show.ts b/packages/backend/src/server/api/endpoints/announcements/show.ts
new file mode 100644
index 0000000000..6312a0a54c
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/announcements/show.ts
@@ -0,0 +1,54 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Injectable } from '@nestjs/common';
+import { EntityNotFoundError } from 'typeorm';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import { AnnouncementService } from '@/core/AnnouncementService.js';
+import { ApiError } from '../../error.js';
+
+export const meta = {
+	tags: ['meta'],
+
+	requireCredential: false,
+
+	res: {
+		type: 'object',
+		optional: false, nullable: false,
+		ref: 'Announcement',
+	},
+
+	errors: {
+		noSuchAnnouncement: {
+			message: 'No such announcement.',
+			code: 'NO_SUCH_ANNOUNCEMENT',
+			id: 'b57b5e1d-4f49-404a-9edb-46b00268f121',
+		},
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		announcementId: { type: 'string', format: 'misskey:id' },
+	},
+	required: ['announcementId'],
+} as const;
+
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
+	constructor(
+		private announcementService: AnnouncementService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			try {
+				return await this.announcementService.getAnnouncement(ps.announcementId, me);
+			} catch (err) {
+				if (err instanceof EntityNotFoundError) throw new ApiError(meta.errors.noSuchAnnouncement);
+				throw err;
+			}
+		});
+	}
+}
diff --git a/packages/backend/src/server/api/endpoints/i/update.ts b/packages/backend/src/server/api/endpoints/i/update.ts
index 84a1931a3d..a8e702f328 100644
--- a/packages/backend/src/server/api/endpoints/i/update.ts
+++ b/packages/backend/src/server/api/endpoints/i/update.ts
@@ -498,26 +498,32 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 	private async verifyLink(url: string, user: MiLocalUser) {
 		if (!safeForSql(url)) return;
 
-		const html = await this.httpRequestService.getHtml(url);
+		try {
+			const html = await this.httpRequestService.getHtml(url);
 
-		const { window } = new JSDOM(html);
-		const doc = window.document;
+			const { window } = new JSDOM(html);
+			const doc = window.document;
 
-		const myLink = `${this.config.url}/@${user.username}`;
+			const myLink = `${this.config.url}/@${user.username}`;
 
-		const aEls = Array.from(doc.getElementsByTagName('a'));
-		const linkEls = Array.from(doc.getElementsByTagName('link'));
+			const aEls = Array.from(doc.getElementsByTagName('a'));
+			const linkEls = Array.from(doc.getElementsByTagName('link'));
 
-		const includesMyLink = aEls.some(a => a.href === myLink);
-		const includesRelMeLinks = [...aEls, ...linkEls].some(link => link.rel === 'me' && link.href === myLink);
+			const includesMyLink = aEls.some(a => a.href === myLink);
+			const includesRelMeLinks = [...aEls, ...linkEls].some(link => link.rel === 'me' && link.href === myLink);
 
-		if (includesMyLink || includesRelMeLinks) {
-			await this.userProfilesRepository.createQueryBuilder('profile').update()
-				.where('userId = :userId', { userId: user.id })
-				.set({
-					verifiedLinks: () => `array_append("verifiedLinks", '${url}')`, // ここでSQLインジェクションされそうなのでとりあえず safeForSql で弾いている
-				})
-				.execute();
+			if (includesMyLink || includesRelMeLinks) {
+				await this.userProfilesRepository.createQueryBuilder('profile').update()
+					.where('userId = :userId', { userId: user.id })
+					.set({
+						verifiedLinks: () => `array_append("verifiedLinks", '${url}')`, // ここでSQLインジェクションされそうなのでとりあえず safeForSql で弾いている
+					})
+					.execute();
+			}
+
+			window.close();
+		} catch (err) {
+			// なにもしない
 		}
 	}
 }
diff --git a/packages/backend/src/server/web/ClientServerService.ts b/packages/backend/src/server/web/ClientServerService.ts
index f35ec8ba31..ab03489c0d 100644
--- a/packages/backend/src/server/web/ClientServerService.ts
+++ b/packages/backend/src/server/web/ClientServerService.ts
@@ -466,7 +466,9 @@ export class ClientServerService {
 		};
 
 		// Atom
-		fastify.get<{ Params: { user: string; } }>('/@:user.atom', async (request, reply) => {
+		fastify.get<{ Params: { user?: string; } }>('/@:user.atom', async (request, reply) => {
+			if (request.params.user == null) return await renderBase(reply);
+
 			const feed = await getFeed(request.params.user);
 
 			if (feed) {
@@ -479,7 +481,9 @@ export class ClientServerService {
 		});
 
 		// RSS
-		fastify.get<{ Params: { user: string; } }>('/@:user.rss', async (request, reply) => {
+		fastify.get<{ Params: { user?: string; } }>('/@:user.rss', async (request, reply) => {
+			if (request.params.user == null) return await renderBase(reply);
+
 			const feed = await getFeed(request.params.user);
 
 			if (feed) {
@@ -492,7 +496,9 @@ export class ClientServerService {
 		});
 
 		// JSON
-		fastify.get<{ Params: { user: string; } }>('/@:user.json', async (request, reply) => {
+		fastify.get<{ Params: { user?: string; } }>('/@:user.json', async (request, reply) => {
+			if (request.params.user == null) return await renderBase(reply);
+
 			const feed = await getFeed(request.params.user);
 
 			if (feed) {
diff --git a/packages/backend/test/unit/AnnouncementService.ts b/packages/backend/test/unit/AnnouncementService.ts
index aa082ff2f2..81da0fac31 100644
--- a/packages/backend/test/unit/AnnouncementService.ts
+++ b/packages/backend/test/unit/AnnouncementService.ts
@@ -10,6 +10,7 @@ import { ModuleMocker } from 'jest-mock';
 import { Test } from '@nestjs/testing';
 import { GlobalModule } from '@/GlobalModule.js';
 import { AnnouncementService } from '@/core/AnnouncementService.js';
+import { AnnouncementEntityService } from '@/core/entities/AnnouncementEntityService.js';
 import type {
 	AnnouncementReadsRepository,
 	AnnouncementsRepository,
@@ -67,6 +68,7 @@ describe('AnnouncementService', () => {
 			],
 			providers: [
 				AnnouncementService,
+				AnnouncementEntityService,
 				CacheService,
 				IdService,
 			],
diff --git a/packages/frontend/src/cache.ts b/packages/frontend/src/cache.ts
index b286528de6..bfe8fbe0e4 100644
--- a/packages/frontend/src/cache.ts
+++ b/packages/frontend/src/cache.ts
@@ -11,3 +11,4 @@ export const clipsCache = new Cache<Misskey.entities.Clip[]>(1000 * 60 * 30, ()
 export const rolesCache = new Cache(1000 * 60 * 30, () => misskeyApi('admin/roles/list'));
 export const userListsCache = new Cache<Misskey.entities.UserList[]>(1000 * 60 * 30, () => misskeyApi('users/lists/list'));
 export const antennasCache = new Cache<Misskey.entities.Antenna[]>(1000 * 60 * 30, () => misskeyApi('antennas/list'));
+export const favoritedChannelsCache = new Cache<Misskey.entities.Channel[]>(1000 * 60 * 30, () => misskeyApi('channels/my-favorites', { limit: 100 }));
diff --git a/packages/frontend/src/pages/admin/federation.vue b/packages/frontend/src/pages/admin/federation.vue
index de27e1f67a..0aaa398584 100644
--- a/packages/frontend/src/pages/admin/federation.vue
+++ b/packages/frontend/src/pages/admin/federation.vue
@@ -58,6 +58,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
+import * as Misskey from 'misskey-js';
 import { computed, ref } from 'vue';
 import XHeader from './_header_.vue';
 import MkInput from '@/components/MkInput.vue';
@@ -90,8 +91,17 @@ const pagination = {
 	})),
 };
 
-function getStatus(instance) {
-	if (instance.isSuspended) return 'Suspended';
+function getStatus(instance: Misskey.entities.FederationInstance) {
+	switch (instance.suspensionState) {
+		case 'manuallySuspended':
+			return 'Manually Suspended';
+		case 'goneSuspended':
+			return 'Automatically Suspended (Gone)';
+		case 'autoSuspendedForNotResponding':
+			return 'Automatically Suspended (Not Responding)';
+		case 'none':
+			break;
+	}
 	if (instance.isBlocked) return 'Blocked';
 	if (instance.isSilenced) return 'Silenced';
 	if (instance.isNotResponding) return 'Error';
diff --git a/packages/frontend/src/pages/admin/files.vue b/packages/frontend/src/pages/admin/files.vue
index 3fe021e771..5132b85c64 100644
--- a/packages/frontend/src/pages/admin/files.vue
+++ b/packages/frontend/src/pages/admin/files.vue
@@ -42,7 +42,7 @@ import MkInput from '@/components/MkInput.vue';
 import MkSelect from '@/components/MkSelect.vue';
 import MkFileListForAdmin from '@/components/MkFileListForAdmin.vue';
 import * as os from '@/os.js';
-import { misskeyApi } from '@/scripts/misskey-api.js';
+import { lookupFile } from '@/scripts/admin-lookup.js';
 import { i18n } from '@/i18n.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
 
@@ -73,33 +73,10 @@ function clear() {
 	});
 }
 
-function show(file) {
-	os.pageWindow(`/admin/file/${file.id}`);
-}
-
-async function find() {
-	const { canceled, result: q } = await os.inputText({
-		title: i18n.ts.fileIdOrUrl,
-		minLength: 1,
-	});
-	if (canceled) return;
-
-	misskeyApi('admin/drive/show-file', q.startsWith('http://') || q.startsWith('https://') ? { url: q.trim() } : { fileId: q.trim() }).then(file => {
-		show(file);
-	}).catch(err => {
-		if (err.code === 'NO_SUCH_FILE') {
-			os.alert({
-				type: 'error',
-				text: i18n.ts.notFound,
-			});
-		}
-	});
-}
-
 const headerActions = computed(() => [{
 	text: i18n.ts.lookup,
 	icon: 'ti ti-search',
-	handler: find,
+	handler: lookupFile,
 }, {
 	text: i18n.ts.clearCachedFiles,
 	icon: 'ti ti-trash',
diff --git a/packages/frontend/src/pages/admin/index.vue b/packages/frontend/src/pages/admin/index.vue
index d4a41c66cc..eef1c8afa9 100644
--- a/packages/frontend/src/pages/admin/index.vue
+++ b/packages/frontend/src/pages/admin/index.vue
@@ -33,9 +33,10 @@ import { i18n } from '@/i18n.js';
 import MkSuperMenu from '@/components/MkSuperMenu.vue';
 import MkInfo from '@/components/MkInfo.vue';
 import { instance } from '@/instance.js';
+import { lookup } from '@/scripts/lookup.js';
 import * as os from '@/os.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
-import { lookupUser, lookupUserByEmail } from '@/scripts/lookup-user.js';
+import { lookupUser, lookupUserByEmail, lookupFile } from '@/scripts/admin-lookup.js';
 import { PageMetadata, definePageMetadata, provideMetadataReceiver, provideReactiveMetadata } from '@/scripts/page-metadata.js';
 import { useRouter } from '@/router/supplier.js';
 
@@ -82,7 +83,7 @@ const menuDef = computed(() => [{
 		type: 'button',
 		icon: 'ti ti-search',
 		text: i18n.ts.lookup,
-		action: lookup,
+		action: adminLookup,
 	}, ...(instance.disableRegistration ? [{
 		type: 'button',
 		icon: 'ti ti-user-plus',
@@ -282,7 +283,7 @@ function invite() {
 	});
 }
 
-function lookup(ev: MouseEvent) {
+function adminLookup(ev: MouseEvent) {
 	os.popupMenu([{
 		text: i18n.ts.user,
 		icon: 'ti ti-user',
@@ -296,22 +297,16 @@ function lookup(ev: MouseEvent) {
 			lookupUserByEmail();
 		},
 	}, {
-		text: i18n.ts.note,
-		icon: 'ti ti-pencil',
-		action: () => {
-			alert('TODO');
-		},
-	}, {
 		text: i18n.ts.file,
 		icon: 'ti ti-cloud',
 		action: () => {
-			alert('TODO');
+			lookupFile();
 		},
 	}, {
-		text: i18n.ts.instance,
-		icon: 'ti ti-planet',
+		text: i18n.ts.lookup,
+		icon: 'ti ti-world-search',
 		action: () => {
-			alert('TODO');
+			lookup();
 		},
 	}], ev.currentTarget ?? ev.target);
 }
diff --git a/packages/frontend/src/pages/admin/users.vue b/packages/frontend/src/pages/admin/users.vue
index 06317760d2..7d87b97a36 100644
--- a/packages/frontend/src/pages/admin/users.vue
+++ b/packages/frontend/src/pages/admin/users.vue
@@ -63,7 +63,7 @@ import MkInput from '@/components/MkInput.vue';
 import MkSelect from '@/components/MkSelect.vue';
 import MkPagination from '@/components/MkPagination.vue';
 import * as os from '@/os.js';
-import { lookupUser } from '@/scripts/lookup-user.js';
+import { lookupUser } from '@/scripts/admin-lookup.js';
 import { i18n } from '@/i18n.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
 import MkUserCardMini from '@/components/MkUserCardMini.vue';
diff --git a/packages/frontend/src/pages/announcement.vue b/packages/frontend/src/pages/announcement.vue
new file mode 100644
index 0000000000..85ae9062d4
--- /dev/null
+++ b/packages/frontend/src/pages/announcement.vue
@@ -0,0 +1,142 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<MkStickyContainer>
+	<template #header><MkPageHeader :actions="headerActions" :tabs="headerTabs"/></template>
+	<MkSpacer :contentMax="800">
+		<Transition
+			:enterActiveClass="defaultStore.state.animation ? $style.fadeEnterActive : ''"
+			:leaveActiveClass="defaultStore.state.animation ? $style.fadeLeaveActive : ''"
+			:enterFromClass="defaultStore.state.animation ? $style.fadeEnterFrom : ''"
+			:leaveToClass="defaultStore.state.animation ? $style.fadeLeaveTo : ''"
+			mode="out-in"
+		>
+			<div v-if="announcement" :key="announcement.id" class="_panel" :class="$style.announcement">
+				<div v-if="announcement.forYou" :class="$style.forYou"><i class="ti ti-pin"></i> {{ i18n.ts.forYou }}</div>
+				<div :class="$style.header">
+					<span v-if="$i && !announcement.silence && !announcement.isRead" style="margin-right: 0.5em;">🆕</span>
+					<span style="margin-right: 0.5em;">
+						<i v-if="announcement.icon === 'info'" class="ti ti-info-circle"></i>
+						<i v-else-if="announcement.icon === 'warning'" class="ti ti-alert-triangle" style="color: var(--warn);"></i>
+						<i v-else-if="announcement.icon === 'error'" class="ti ti-circle-x" style="color: var(--error);"></i>
+						<i v-else-if="announcement.icon === 'success'" class="ti ti-check" style="color: var(--success);"></i>
+					</span>
+					<Mfm :text="announcement.title"/>
+				</div>
+				<div :class="$style.content">
+					<Mfm :text="announcement.text"/>
+					<img v-if="announcement.imageUrl" :src="announcement.imageUrl"/>
+					<div style="margin-top: 8px; opacity: 0.7; font-size: 85%;">
+						{{ i18n.ts.createdAt }}: <MkTime :time="announcement.createdAt" mode="detail"/>
+					</div>
+					<div v-if="announcement.updatedAt" style="opacity: 0.7; font-size: 85%;">
+						{{ i18n.ts.updatedAt }}: <MkTime :time="announcement.updatedAt" mode="detail"/>
+					</div>
+				</div>
+				<div v-if="$i && !announcement.silence && !announcement.isRead" :class="$style.footer">
+					<MkButton primary @click="read(announcement)"><i class="ti ti-check"></i> {{ i18n.ts.gotIt }}</MkButton>
+				</div>
+			</div>
+			<MkError v-else-if="error" @retry="fetch()"/>
+			<MkLoading v-else/>
+		</Transition>
+	</MkSpacer>
+</MkStickyContainer>
+</template>
+
+<script lang="ts" setup>
+import { ref, computed, watch } from 'vue';
+import * as Misskey from 'misskey-js';
+import MkButton from '@/components/MkButton.vue';
+import * as os from '@/os.js';
+import { misskeyApi } from '@/scripts/misskey-api.js';
+import { i18n } from '@/i18n.js';
+import { definePageMetadata } from '@/scripts/page-metadata.js';
+import { $i, updateAccount } from '@/account.js';
+import { defaultStore } from '@/store.js';
+
+const props = defineProps<{
+	announcementId: string;
+}>();
+
+const announcement = ref<Misskey.entities.Announcement | null>(null);
+const error = ref<any>(null);
+const path = computed(() => props.announcementId);
+
+function fetch() {
+	announcement.value = null;
+	misskeyApi('announcements/show', {
+		announcementId: props.announcementId,
+	}).then(async _announcement => {
+		announcement.value = _announcement;
+	}).catch(err => {
+		error.value = err;
+	});
+}
+
+async function read(target: Misskey.entities.Announcement): Promise<void> {
+	if (target.needConfirmationToRead) {
+		const confirm = await os.confirm({
+			type: 'question',
+			title: i18n.ts._announcement.readConfirmTitle,
+			text: i18n.tsx._announcement.readConfirmText({ title: target.title }),
+		});
+		if (confirm.canceled) return;
+	}
+
+	target.isRead = true;
+	await misskeyApi('i/read-announcement', { announcementId: target.id });
+	if ($i) {
+		updateAccount({
+			unreadAnnouncements: $i.unreadAnnouncements.filter((a: { id: string; }) => a.id !== target.id),
+		});
+	}
+}
+
+watch(() => path.value, fetch, { immediate: true });
+
+const headerActions = computed(() => []);
+
+const headerTabs = computed(() => []);
+
+definePageMetadata(() => ({
+	title: announcement.value ? `${i18n.ts.announcements}: ${announcement.value.title}` : i18n.ts.announcements,
+	icon: 'ti ti-speakerphone',
+}));
+</script>
+
+<style lang="scss" module>
+.announcement {
+	padding: 16px;
+}
+
+.forYou {
+	display: flex;
+	align-items: center;
+	line-height: 24px;
+	font-size: 90%;
+	white-space: pre;
+	color: #d28a3f;
+}
+
+.header {
+	margin-bottom: 16px;
+	font-weight: bold;
+	font-size: 120%;
+}
+
+.content {
+	> img {
+		display: block;
+		max-height: 300px;
+		max-width: 100%;
+	}
+}
+
+.footer {
+	margin-top: 16px;
+}
+</style>
diff --git a/packages/frontend/src/pages/announcements.vue b/packages/frontend/src/pages/announcements.vue
index bcd6eb7c0f..e50b208775 100644
--- a/packages/frontend/src/pages/announcements.vue
+++ b/packages/frontend/src/pages/announcements.vue
@@ -21,14 +21,19 @@ SPDX-License-Identifier: AGPL-3.0-only
 								<i v-else-if="announcement.icon === 'error'" class="ti ti-circle-x" style="color: var(--error);"></i>
 								<i v-else-if="announcement.icon === 'success'" class="ti ti-check" style="color: var(--success);"></i>
 							</span>
-							<span>{{ announcement.title }}</span>
+							<MkA :to="`/announcements/${announcement.id}`"><span>{{ announcement.title }}</span></MkA>
 						</div>
 						<div :class="$style.content">
 							<Mfm :text="announcement.text"/>
 							<img v-if="announcement.imageUrl" :src="announcement.imageUrl"/>
-							<div style="opacity: 0.7; font-size: 85%;">
-								<MkTime :time="announcement.updatedAt ?? announcement.createdAt" mode="detail"/>
-							</div>
+							<MkA :to="`/announcements/${announcement.id}`">
+								<div style="margin-top: 8px; opacity: 0.7; font-size: 85%;">
+									{{ i18n.ts.createdAt }}: <MkTime :time="announcement.createdAt" mode="detail"/>
+								</div>
+								<div v-if="announcement.updatedAt" style="opacity: 0.7; font-size: 85%;">
+									{{ i18n.ts.updatedAt }}: <MkTime :time="announcement.updatedAt" mode="detail"/>
+								</div>
+							</MkA>
 						</div>
 						<div v-if="tab !== 'past' && $i && !announcement.silence && !announcement.isRead" :class="$style.footer">
 							<MkButton primary @click="read(announcement)"><i class="ti ti-check"></i> {{ i18n.ts.gotIt }}</MkButton>
@@ -73,24 +78,24 @@ const paginationEl = ref<InstanceType<typeof MkPagination>>();
 
 const tab = ref('current');
 
-async function read(announcement) {
-	if (announcement.needConfirmationToRead) {
+async function read(target) {
+	if (target.needConfirmationToRead) {
 		const confirm = await os.confirm({
 			type: 'question',
 			title: i18n.ts._announcement.readConfirmTitle,
-			text: i18n.tsx._announcement.readConfirmText({ title: announcement.title }),
+			text: i18n.tsx._announcement.readConfirmText({ title: target.title }),
 		});
 		if (confirm.canceled) return;
 	}
 
 	if (!paginationEl.value) return;
-	paginationEl.value.updateItem(announcement.id, a => {
+	paginationEl.value.updateItem(target.id, a => {
 		a.isRead = true;
 		return a;
 	});
-	misskeyApi('i/read-announcement', { announcementId: announcement.id });
+	misskeyApi('i/read-announcement', { announcementId: target.id });
 	updateAccount({
-		unreadAnnouncements: $i!.unreadAnnouncements.filter(a => a.id !== announcement.id),
+		unreadAnnouncements: $i!.unreadAnnouncements.filter(a => a.id !== target.id),
 	});
 }
 
diff --git a/packages/frontend/src/pages/channel.vue b/packages/frontend/src/pages/channel.vue
index 611ae6feca..a895df76e8 100644
--- a/packages/frontend/src/pages/channel.vue
+++ b/packages/frontend/src/pages/channel.vue
@@ -83,6 +83,7 @@ import { definePageMetadata } from '@/scripts/page-metadata.js';
 import { deviceKind } from '@/scripts/device-kind.js';
 import MkNotes from '@/components/MkNotes.vue';
 import { url } from '@/config.js';
+import { favoritedChannelsCache } from '@/cache.js';
 import MkButton from '@/components/MkButton.vue';
 import MkInput from '@/components/MkInput.vue';
 import { defaultStore } from '@/store.js';
@@ -153,6 +154,7 @@ function favorite() {
 		channelId: channel.value.id,
 	}).then(() => {
 		favorited.value = true;
+		favoritedChannelsCache.delete();
 	});
 }
 
@@ -168,6 +170,7 @@ async function unfavorite() {
 		channelId: channel.value.id,
 	}).then(() => {
 		favorited.value = false;
+		favoritedChannelsCache.delete();
 	});
 }
 
diff --git a/packages/frontend/src/pages/instance-info.vue b/packages/frontend/src/pages/instance-info.vue
index cb7fe2866c..26797ba85e 100644
--- a/packages/frontend/src/pages/instance-info.vue
+++ b/packages/frontend/src/pages/instance-info.vue
@@ -35,7 +35,16 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<FormSection v-if="iAmModerator">
 					<template #label>Moderation</template>
 					<div class="_gaps_s">
-						<MkSwitch v-model="suspended" :disabled="!instance" @update:modelValue="toggleSuspend">{{ i18n.ts.stopActivityDelivery }}</MkSwitch>
+						<MkKeyValue>
+							<template #key>
+								{{ i18n.ts._delivery.status }}
+							</template>
+							<template #value>
+								{{ i18n.ts._delivery._type[suspensionState] }}
+							</template>
+						</MkKeyValue>
+						<MkButton v-if="suspensionState === 'none'" :disabled="!instance" danger @click="stopDelivery">{{ i18n.ts._delivery.stop }}</MkButton>
+						<MkButton v-if="suspensionState !== 'none'" :disabled="!instance" @click="resumeDelivery">{{ i18n.ts._delivery.resume }}</MkButton>
 						<MkSwitch v-model="isBlocked" :disabled="!meta || !instance" @update:modelValue="toggleBlock">{{ i18n.ts.blockThisInstance }}</MkSwitch>
 						<MkSwitch v-model="isSilenced" :disabled="!meta || !instance" @update:modelValue="toggleSilenced">{{ i18n.ts.silenceThisInstance }}</MkSwitch>
 						<MkButton @click="refreshMetadata"><i class="ti ti-refresh"></i> Refresh metadata</MkButton>
@@ -155,7 +164,7 @@ const tab = ref('overview');
 const chartSrc = ref('instance-requests');
 const meta = ref<Misskey.entities.AdminMetaResponse | null>(null);
 const instance = ref<Misskey.entities.FederationInstance | null>(null);
-const suspended = ref(false);
+const suspensionState = ref<'none' | 'manuallySuspended' | 'goneSuspended' | 'autoSuspendedForNotResponding'>('none');
 const isBlocked = ref(false);
 const isSilenced = ref(false);
 const faviconUrl = ref<string | null>(null);
@@ -183,7 +192,7 @@ async function fetch(): Promise<void> {
 	instance.value = await misskeyApi('federation/show-instance', {
 		host: props.host,
 	});
-	suspended.value = instance.value?.isSuspended ?? false;
+	suspensionState.value = instance.value?.suspensionState ?? 'none';
 	isBlocked.value = instance.value?.isBlocked ?? false;
 	isSilenced.value = instance.value?.isSilenced ?? false;
 	faviconUrl.value = getProxiedImageUrlNullable(instance.value?.faviconUrl, 'preview') ?? getProxiedImageUrlNullable(instance.value?.iconUrl, 'preview');
@@ -209,11 +218,21 @@ async function toggleSilenced(): Promise<void> {
 	});
 }
 
-async function toggleSuspend(): Promise<void> {
+async function stopDelivery(): Promise<void> {
 	if (!instance.value) throw new Error('No instance?');
+	suspensionState.value = 'manuallySuspended';
 	await misskeyApi('admin/federation/update-instance', {
 		host: instance.value.host,
-		isSuspended: suspended.value,
+		isSuspended: true,
+	});
+}
+
+async function resumeDelivery(): Promise<void> {
+	if (!instance.value) throw new Error('No instance?');
+	suspensionState.value = 'none';
+	await misskeyApi('admin/federation/update-instance', {
+		host: instance.value.host,
+		isSuspended: false,
 	});
 }
 
diff --git a/packages/frontend/src/pages/settings/general.vue b/packages/frontend/src/pages/settings/general.vue
index 55d514ddf9..cfc63f2a08 100644
--- a/packages/frontend/src/pages/settings/general.vue
+++ b/packages/frontend/src/pages/settings/general.vue
@@ -50,9 +50,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 		<div class="_gaps_m">
 			<div class="_gaps_s">
+				<MkSwitch v-model="collapseRenotes">
+					<template #label>{{ i18n.ts.collapseRenotes }}</template>
+					<template #caption>{{ i18n.ts.collapseRenotesDescription }}</template>
+				</MkSwitch>
 				<MkSwitch v-model="showNoteActionsOnlyHover">{{ i18n.ts.showNoteActionsOnlyHover }}</MkSwitch>
 				<MkSwitch v-model="showClipButtonInNoteFooter">{{ i18n.ts.showClipButtonInNoteFooter }}</MkSwitch>
-				<MkSwitch v-model="collapseRenotes">{{ i18n.ts.collapseRenotes }}</MkSwitch>
 				<MkSwitch v-model="advancedMfm">{{ i18n.ts.enableAdvancedMfm }}</MkSwitch>
 				<MkSwitch v-if="advancedMfm" v-model="animatedMfm">{{ i18n.ts.enableAnimatedMfm }}</MkSwitch>
 				<MkSwitch v-if="advancedMfm" v-model="enableQuickAddMfmFunction">{{ i18n.ts.enableQuickAddMfmFunction }}</MkSwitch>
diff --git a/packages/frontend/src/pages/timeline.vue b/packages/frontend/src/pages/timeline.vue
index 48dfc1fd44..98744c6318 100644
--- a/packages/frontend/src/pages/timeline.vue
+++ b/packages/frontend/src/pages/timeline.vue
@@ -48,7 +48,7 @@ import { i18n } from '@/i18n.js';
 import { instance } from '@/instance.js';
 import { $i } from '@/account.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
-import { antennasCache, userListsCache } from '@/cache.js';
+import { antennasCache, userListsCache, favoritedChannelsCache } from '@/cache.js';
 import { deviceKind } from '@/scripts/device-kind.js';
 import { deepMerge } from '@/scripts/merge.js';
 import { MenuItem } from '@/types/menu.js';
@@ -173,9 +173,7 @@ async function chooseAntenna(ev: MouseEvent): Promise<void> {
 }
 
 async function chooseChannel(ev: MouseEvent): Promise<void> {
-	const channels = await misskeyApi('channels/my-favorites', {
-		limit: 100,
-	});
+	const channels = await favoritedChannelsCache.fetch();
 	const items: MenuItem[] = [
 		...channels.map(channel => {
 			const lastReadedAt = miLocalStorage.getItemAsJson(`channelLastReadedAt:${channel.id}`) ?? null;
diff --git a/packages/frontend/src/router/definition.ts b/packages/frontend/src/router/definition.ts
index c5b576f505..c12ae0fa57 100644
--- a/packages/frontend/src/router/definition.ts
+++ b/packages/frontend/src/router/definition.ts
@@ -194,6 +194,9 @@ const routes: RouteDef[] = [{
 	path: '/announcements',
 	component: page(() => import('@/pages/announcements.vue')),
 }, {
+	path: '/announcements/:announcementId',
+	component: page(() => import('@/pages/announcement.vue')),
+}, {
 	path: '/about',
 	component: page(() => import('@/pages/about.vue')),
 	hash: 'initialTab',
diff --git a/packages/frontend/src/scripts/lookup-user.ts b/packages/frontend/src/scripts/admin-lookup.ts
index efc9132e75..1b57b853c9 100644
--- a/packages/frontend/src/scripts/lookup-user.ts
+++ b/packages/frontend/src/scripts/admin-lookup.ts
@@ -63,3 +63,26 @@ export async function lookupUserByEmail() {
 		}
 	}
 }
+
+export async function lookupFile() {
+	const { canceled, result: q } = await os.inputText({
+		title: i18n.ts.fileIdOrUrl,
+		minLength: 1,
+	});
+	if (canceled) return;
+
+	const show = (file) => {
+		os.pageWindow(`/admin/file/${file.id}`);
+	};
+
+	misskeyApi('admin/drive/show-file', q.startsWith('http://') || q.startsWith('https://') ? { url: q.trim() } : { fileId: q.trim() }).then(file => {
+		show(file);
+	}).catch(err => {
+		if (err.code === 'NO_SUCH_FILE') {
+			os.alert({
+				type: 'error',
+				text: i18n.ts.notFound,
+			});
+		}
+	});
+}
diff --git a/packages/frontend/src/scripts/get-note-menu.ts b/packages/frontend/src/scripts/get-note-menu.ts
index e7c9a848e0..71ad299f50 100644
--- a/packages/frontend/src/scripts/get-note-menu.ts
+++ b/packages/frontend/src/scripts/get-note-menu.ts
@@ -16,7 +16,7 @@ import { url } from '@/config.js';
 import { defaultStore, noteActions } from '@/store.js';
 import { miLocalStorage } from '@/local-storage.js';
 import { getUserMenu } from '@/scripts/get-user-menu.js';
-import { clipsCache } from '@/cache.js';
+import { clipsCache, favoritedChannelsCache } from '@/cache.js';
 import { MenuItem } from '@/types/menu.js';
 import MkRippleEffect from '@/components/MkRippleEffect.vue';
 import { isSupportShare } from '@/scripts/navigator.js';
@@ -603,9 +603,7 @@ export function getRenoteMenu(props: {
 			icon: 'ti ti-repeat',
 			text: appearNote.channel ? i18n.ts.renoteToOtherChannel : i18n.ts.renoteToChannel,
 			children: async () => {
-				const channels = await misskeyApi('channels/my-favorites', {
-					limit: 30,
-				});
+				const channels = await favoritedChannelsCache.fetch();
 				return channels.filter((channel) => {
 					if (!appearNote.channelId) return true;
 					return channel.id !== appearNote.channelId;
diff --git a/packages/frontend/src/ui/_common_/announcements.vue b/packages/frontend/src/ui/_common_/announcements.vue
index 362c29e6c2..374bc20b54 100644
--- a/packages/frontend/src/ui/_common_/announcements.vue
+++ b/packages/frontend/src/ui/_common_/announcements.vue
@@ -9,7 +9,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		v-for="announcement in $i.unreadAnnouncements.filter(x => x.display === 'banner')"
 		:key="announcement.id"
 		:class="$style.item"
-		to="/announcements"
+		:to="`/announcements/${announcement.id}`"
 	>
 		<span :class="$style.icon">
 			<i v-if="announcement.icon === 'info'" class="ti ti-info-circle"></i>
diff --git a/packages/frontend/src/ui/deck/channel-column.vue b/packages/frontend/src/ui/deck/channel-column.vue
index bd3b059497..28c741bba2 100644
--- a/packages/frontend/src/ui/deck/channel-column.vue
+++ b/packages/frontend/src/ui/deck/channel-column.vue
@@ -26,6 +26,7 @@ import { updateColumn, Column } from './deck-store.js';
 import MkTimeline from '@/components/MkTimeline.vue';
 import MkButton from '@/components/MkButton.vue';
 import * as os from '@/os.js';
+import { favoritedChannelsCache } from '@/cache.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
 import { i18n } from '@/i18n.js';
 
@@ -42,20 +43,18 @@ if (props.column.channelId == null) {
 }
 
 async function setChannel() {
-	const channels = await misskeyApi('channels/my-favorites', {
-		limit: 100,
-	});
-	const { canceled, result: channel } = await os.select({
+	const channels = await favoritedChannelsCache.fetch();
+	const { canceled, result: chosenChannel } = await os.select({
 		title: i18n.ts.selectChannel,
 		items: channels.map(x => ({
 			value: x, text: x.name,
 		})),
 		default: props.column.channelId,
 	});
-	if (canceled) return;
+	if (canceled || chosenChannel == null) return;
 	updateColumn(props.column.id, {
-		channelId: channel.id,
-		name: channel.name,
+		channelId: chosenChannel.id,
+		name: chosenChannel.name,
 	});
 }
 
diff --git a/packages/misskey-js/etc/misskey-js.api.md b/packages/misskey-js/etc/misskey-js.api.md
index 9720b04e39..6ff711cabb 100644
--- a/packages/misskey-js/etc/misskey-js.api.md
+++ b/packages/misskey-js/etc/misskey-js.api.md
@@ -337,6 +337,12 @@ type AnnouncementsRequest = operations['announcements']['requestBody']['content'
 type AnnouncementsResponse = operations['announcements']['responses']['200']['content']['application/json'];
 
 // @public (undocumented)
+type AnnouncementsShowRequest = operations['announcements___show']['requestBody']['content']['application/json'];
+
+// @public (undocumented)
+type AnnouncementsShowResponse = operations['announcements___show']['responses']['200']['content']['application/json'];
+
+// @public (undocumented)
 type Antenna = components['schemas']['Antenna'];
 
 // @public (undocumented)
@@ -1224,6 +1230,8 @@ declare namespace entities {
         AdminRolesUsersResponse,
         AnnouncementsRequest,
         AnnouncementsResponse,
+        AnnouncementsShowRequest,
+        AnnouncementsShowResponse,
         AntennasCreateRequest,
         AntennasCreateResponse,
         AntennasDeleteRequest,
@@ -2626,7 +2634,7 @@ type PagesUpdateRequest = operations['pages___update']['requestBody']['content']
 function parse(acct: string): Acct;
 
 // @public (undocumented)
-export const permissions: readonly ["read:account", "write:account", "read:blocks", "write:blocks", "read:drive", "write:drive", "read:favorites", "write:favorites", "read:following", "write:following", "read:messaging", "write:messaging", "read:mutes", "write:mutes", "write:notes", "read:notifications", "write:notifications", "read:reactions", "write:reactions", "write:votes", "read:pages", "write:pages", "write:page-likes", "read:page-likes", "read:user-groups", "write:user-groups", "read:channels", "write:channels", "read:gallery", "write:gallery", "read:gallery-likes", "write:gallery-likes", "read:flash", "write:flash", "read:flash-likes", "write:flash-likes", "read:admin:abuse-user-reports", "write:admin:delete-account", "write:admin:delete-all-files-of-a-user", "read:admin:index-stats", "read:admin:table-stats", "read:admin:user-ips", "read:admin:meta", "write:admin:reset-password", "write:admin:resolve-abuse-user-report", "write:admin:send-email", "read:admin:server-info", "read:admin:show-moderation-log", "read:admin:show-user", "read:admin:show-users", "write:admin:suspend-user", "write:admin:unset-user-avatar", "write:admin:unset-user-banner", "write:admin:unsuspend-user", "write:admin:meta", "write:admin:user-note", "write:admin:roles", "read:admin:roles", "write:admin:relays", "read:admin:relays", "write:admin:invite-codes", "read:admin:invite-codes", "write:admin:announcements", "read:admin:announcements", "write:admin:avatar-decorations", "read:admin:avatar-decorations", "write:admin:federation", "write:admin:account", "read:admin:account", "write:admin:emoji", "read:admin:emoji", "write:admin:queue", "read:admin:queue", "write:admin:promo", "write:admin:drive", "read:admin:drive", "write:admin:ad", "read:admin:ad", "write:invite-codes", "read:invite-codes", "write:clip-favorite", "read:clip-favorite", "read:federation", "write:report-abuse"];
+export const permissions: readonly ["read:account", "write:account", "read:blocks", "write:blocks", "read:drive", "write:drive", "read:favorites", "write:favorites", "read:following", "write:following", "read:messaging", "write:messaging", "read:mutes", "write:mutes", "write:notes", "read:notifications", "write:notifications", "read:reactions", "write:reactions", "write:votes", "read:pages", "write:pages", "write:page-likes", "read:page-likes", "read:user-groups", "write:user-groups", "read:channels", "write:channels", "read:gallery", "write:gallery", "read:gallery-likes", "write:gallery-likes", "read:flash", "write:flash", "read:flash-likes", "write:flash-likes", "read:admin:abuse-user-reports", "write:admin:delete-account", "write:admin:delete-all-files-of-a-user", "read:admin:index-stats", "read:admin:table-stats", "read:admin:user-ips", "read:admin:meta", "write:admin:reset-password", "write:admin:resolve-abuse-user-report", "write:admin:send-email", "read:admin:server-info", "read:admin:show-moderation-log", "read:admin:show-user", "write:admin:suspend-user", "write:admin:unset-user-avatar", "write:admin:unset-user-banner", "write:admin:unsuspend-user", "write:admin:meta", "write:admin:user-note", "write:admin:roles", "read:admin:roles", "write:admin:relays", "read:admin:relays", "write:admin:invite-codes", "read:admin:invite-codes", "write:admin:announcements", "read:admin:announcements", "write:admin:avatar-decorations", "read:admin:avatar-decorations", "write:admin:federation", "write:admin:account", "read:admin:account", "write:admin:emoji", "read:admin:emoji", "write:admin:queue", "read:admin:queue", "write:admin:promo", "write:admin:drive", "read:admin:drive", "write:admin:ad", "read:admin:ad", "write:invite-codes", "read:invite-codes", "write:clip-favorite", "read:clip-favorite", "read:federation", "write:report-abuse"];
 
 // @public (undocumented)
 type PingResponse = operations['ping']['responses']['200']['content']['application/json'];
diff --git a/packages/misskey-js/src/autogen/apiClientJSDoc.ts b/packages/misskey-js/src/autogen/apiClientJSDoc.ts
index 5309350100..181f7274b7 100644
--- a/packages/misskey-js/src/autogen/apiClientJSDoc.ts
+++ b/packages/misskey-js/src/autogen/apiClientJSDoc.ts
@@ -678,7 +678,7 @@ declare module '../api.js' {
     /**
      * No description provided.
      * 
-     * **Credential required**: *Yes* / **Permission**: *read:admin:show-users*
+     * **Credential required**: *Yes* / **Permission**: *read:admin:show-user*
      */
     request<E extends 'admin/show-users', P extends Endpoints[E]['req']>(
       endpoint: E,
@@ -854,6 +854,17 @@ declare module '../api.js' {
     /**
      * No description provided.
      * 
+     * **Credential required**: *No*
+     */
+    request<E extends 'announcements/show', P extends Endpoints[E]['req']>(
+      endpoint: E,
+      params: P,
+      credential?: string | null,
+    ): Promise<SwitchCaseResponseType<E, P>>;
+
+    /**
+     * No description provided.
+     * 
      * **Credential required**: *Yes* / **Permission**: *write:account*
      */
     request<E extends 'antennas/create', P extends Endpoints[E]['req']>(
diff --git a/packages/misskey-js/src/autogen/endpoint.ts b/packages/misskey-js/src/autogen/endpoint.ts
index b0982e1e55..ab3baf1670 100644
--- a/packages/misskey-js/src/autogen/endpoint.ts
+++ b/packages/misskey-js/src/autogen/endpoint.ts
@@ -101,6 +101,8 @@ import type {
 	AdminRolesUsersResponse,
 	AnnouncementsRequest,
 	AnnouncementsResponse,
+	AnnouncementsShowRequest,
+	AnnouncementsShowResponse,
 	AntennasCreateRequest,
 	AntennasCreateResponse,
 	AntennasDeleteRequest,
@@ -631,6 +633,7 @@ export type Endpoints = {
 	'admin/roles/update-default-policies': { req: AdminRolesUpdateDefaultPoliciesRequest; res: EmptyResponse };
 	'admin/roles/users': { req: AdminRolesUsersRequest; res: AdminRolesUsersResponse };
 	'announcements': { req: AnnouncementsRequest; res: AnnouncementsResponse };
+	'announcements/show': { req: AnnouncementsShowRequest; res: AnnouncementsShowResponse };
 	'antennas/create': { req: AntennasCreateRequest; res: AntennasCreateResponse };
 	'antennas/delete': { req: AntennasDeleteRequest; res: EmptyResponse };
 	'antennas/list': { req: EmptyRequest; res: AntennasListResponse };
diff --git a/packages/misskey-js/src/autogen/entities.ts b/packages/misskey-js/src/autogen/entities.ts
index 60bf6659c0..02ca932d8a 100644
--- a/packages/misskey-js/src/autogen/entities.ts
+++ b/packages/misskey-js/src/autogen/entities.ts
@@ -104,6 +104,8 @@ export type AdminRolesUsersRequest = operations['admin___roles___users']['reques
 export type AdminRolesUsersResponse = operations['admin___roles___users']['responses']['200']['content']['application/json'];
 export type AnnouncementsRequest = operations['announcements']['requestBody']['content']['application/json'];
 export type AnnouncementsResponse = operations['announcements']['responses']['200']['content']['application/json'];
+export type AnnouncementsShowRequest = operations['announcements___show']['requestBody']['content']['application/json'];
+export type AnnouncementsShowResponse = operations['announcements___show']['responses']['200']['content']['application/json'];
 export type AntennasCreateRequest = operations['antennas___create']['requestBody']['content']['application/json'];
 export type AntennasCreateResponse = operations['antennas___create']['responses']['200']['content']['application/json'];
 export type AntennasDeleteRequest = operations['antennas___delete']['requestBody']['content']['application/json'];
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index 302587ccfa..208f03dc3e 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -567,7 +567,7 @@ export type paths = {
      * admin/show-users
      * @description No description provided.
      *
-     * **Credential required**: *Yes* / **Permission**: *read:admin:show-users*
+     * **Credential required**: *Yes* / **Permission**: *read:admin:show-user*
      */
     post: operations['admin___show-users'];
   };
@@ -706,6 +706,15 @@ export type paths = {
      */
     post: operations['announcements'];
   };
+  '/announcements/show': {
+    /**
+     * announcements/show
+     * @description No description provided.
+     *
+     * **Credential required**: *No*
+     */
+    post: operations['announcements___show'];
+  };
   '/antennas/create': {
     /**
      * antennas/create
@@ -4475,6 +4484,8 @@ export type components = {
       followersCount: number;
       isNotResponding: boolean;
       isSuspended: boolean;
+      /** @enum {string} */
+      suspensionState: 'none' | 'manuallySuspended' | 'goneSuspended' | 'autoSuspendedForNotResponding';
       isBlocked: boolean;
       /** @example misskey */
       softwareName: string | null;
@@ -8645,7 +8656,7 @@ export type operations = {
    * admin/show-users
    * @description No description provided.
    *
-   * **Credential required**: *Yes* / **Permission**: *read:admin:show-users*
+   * **Credential required**: *Yes* / **Permission**: *read:admin:show-user*
    */
   'admin___show-users': {
     requestBody: {
@@ -9661,6 +9672,60 @@ export type operations = {
     };
   };
   /**
+   * announcements/show
+   * @description No description provided.
+   *
+   * **Credential required**: *No*
+   */
+  announcements___show: {
+    requestBody: {
+      content: {
+        'application/json': {
+          /** Format: misskey:id */
+          announcementId: string;
+        };
+      };
+    };
+    responses: {
+      /** @description OK (with results) */
+      200: {
+        content: {
+          'application/json': components['schemas']['Announcement'];
+        };
+      };
+      /** @description Client error */
+      400: {
+        content: {
+          'application/json': components['schemas']['Error'];
+        };
+      };
+      /** @description Authentication error */
+      401: {
+        content: {
+          'application/json': components['schemas']['Error'];
+        };
+      };
+      /** @description Forbidden error */
+      403: {
+        content: {
+          'application/json': components['schemas']['Error'];
+        };
+      };
+      /** @description I'm Ai */
+      418: {
+        content: {
+          'application/json': components['schemas']['Error'];
+        };
+      };
+      /** @description Internal server error */
+      500: {
+        content: {
+          'application/json': components['schemas']['Error'];
+        };
+      };
+    };
+  };
+  /**
    * antennas/create
    * @description No description provided.
    *
diff --git a/packages/misskey-js/src/consts.ts b/packages/misskey-js/src/consts.ts
index b690621e98..fd6ef4d68d 100644
--- a/packages/misskey-js/src/consts.ts
+++ b/packages/misskey-js/src/consts.ts
@@ -58,7 +58,6 @@ export const permissions = [
 	'read:admin:server-info',
 	'read:admin:show-moderation-log',
 	'read:admin:show-user',
-	'read:admin:show-users',
 	'write:admin:suspend-user',
 	'write:admin:unset-user-avatar',
 	'write:admin:unset-user-banner',