merge: Report admin UX improvements (!1060)

View MR for information: https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/1060

Approved-by: Marie <github@yuugi.dev>
Approved-by: dakkar <dakkar@thenautilus.net>

24 files changed, 821 insertions, 124 deletions

diff --git a/packages/backend/src/core/ReversiService.ts b/packages/backend/src/core/ReversiService.ts
index e31d9e5b1a..b57ab6d9cb 100644
--- a/packages/backend/src/core/ReversiService.ts
+++ b/packages/backend/src/core/ReversiService.ts
@@ -588,6 +588,7 @@ export class ReversiService implements OnApplicationShutdown, OnModuleInit {
 					lastFetchedAt: parsed.user1.lastFetchedAt != null ? new Date(parsed.user1.lastFetchedAt) : null,
 					movedAt: parsed.user1.movedAt != null ? new Date(parsed.user1.movedAt) : null,
 					instance: null,
+					userProfile: null,
 				} : null,
 				user2: parsed.user2 != null ? {
 					...parsed.user2,
@@ -599,6 +600,7 @@ export class ReversiService implements OnApplicationShutdown, OnModuleInit {
 					lastFetchedAt: parsed.user2.lastFetchedAt != null ? new Date(parsed.user2.lastFetchedAt) : null,
 					movedAt: parsed.user2.movedAt != null ? new Date(parsed.user2.movedAt) : null,
 					instance: null,
+					userProfile: null,
 				} : null,
 			};
 		} else {
diff --git a/packages/backend/src/core/WebhookTestService.ts b/packages/backend/src/core/WebhookTestService.ts
index 8c1508df24..c4b01d535b 100644
--- a/packages/backend/src/core/WebhookTestService.ts
+++ b/packages/backend/src/core/WebhookTestService.ts
@@ -77,6 +77,7 @@ function generateDummyUser(override?: Partial<MiUser>): MiUser {
 		mandatoryCW: null,
 		rejectQuotes: false,
 		allowUnsignedFetch: 'staff',
+		userProfile: null,
 		attributionDomains: [],
 		...override,
 	};
@@ -363,8 +364,10 @@ export class WebhookTestService {
 			id: 'dummy-abuse-report1',
 			targetUserId: 'dummy-target-user',
 			targetUser: null,
+			targetUserInstance: null,
 			reporterId: 'dummy-reporter-user',
 			reporter: null,
+			reporterInstance: null,
 			assigneeId: null,
 			assignee: null,
 			resolved: false,
diff --git a/packages/backend/src/core/entities/AbuseUserReportEntityService.ts b/packages/backend/src/core/entities/AbuseUserReportEntityService.ts
index 70ead890ab..c1d877aa12 100644
--- a/packages/backend/src/core/entities/AbuseUserReportEntityService.ts
+++ b/packages/backend/src/core/entities/AbuseUserReportEntityService.ts
@@ -5,13 +5,14 @@
 
 import { Inject, Injectable } from '@nestjs/common';
 import { DI } from '@/di-symbols.js';
-import type { AbuseUserReportsRepository } from '@/models/_.js';
+import type { AbuseUserReportsRepository, InstancesRepository, MiInstance, MiUser } from '@/models/_.js';
 import { awaitAll } from '@/misc/prelude/await-all.js';
 import type { MiAbuseUserReport } from '@/models/AbuseUserReport.js';
 import { bindThis } from '@/decorators.js';
 import { IdService } from '@/core/IdService.js';
 import type { Packed } from '@/misc/json-schema.js';
 import { UserEntityService } from './UserEntityService.js';
+import { InstanceEntityService } from './InstanceEntityService.js';
 
 @Injectable()
 export class AbuseUserReportEntityService {
@@ -19,6 +20,10 @@ export class AbuseUserReportEntityService {
 		@Inject(DI.abuseUserReportsRepository)
 		private abuseUserReportsRepository: AbuseUserReportsRepository,
 
+		@Inject(DI.instancesRepository)
+		private instancesRepository: InstancesRepository,
+
+		private readonly instanceEntityService: InstanceEntityService,
 		private userEntityService: UserEntityService,
 		private idService: IdService,
 	) {
@@ -30,11 +35,14 @@ export class AbuseUserReportEntityService {
 		hint?: {
 			packedReporter?: Packed<'UserDetailedNotMe'>,
 			packedTargetUser?: Packed<'UserDetailedNotMe'>,
+			packedTargetInstance?: Packed<'FederationInstance'>,
 			packedAssignee?: Packed<'UserDetailedNotMe'>,
 		},
+		me?: MiUser | null,
 	) {
 		const report = typeof src === 'object' ? src : await this.abuseUserReportsRepository.findOneByOrFail({ id: src });
 
+		// noinspection ES6MissingAwait
 		return await awaitAll({
 			id: report.id,
 			createdAt: this.idService.parse(report.id).date.toISOString(),
@@ -43,13 +51,22 @@ export class AbuseUserReportEntityService {
 			reporterId: report.reporterId,
 			targetUserId: report.targetUserId,
 			assigneeId: report.assigneeId,
-			reporter: hint?.packedReporter ?? this.userEntityService.pack(report.reporter ?? report.reporterId, null, {
+			reporter: hint?.packedReporter ?? this.userEntityService.pack(report.reporter ?? report.reporterId, me, {
 				schema: 'UserDetailedNotMe',
 			}),
-			targetUser: hint?.packedTargetUser ?? this.userEntityService.pack(report.targetUser ?? report.targetUserId, null, {
+			targetUser: hint?.packedTargetUser ?? this.userEntityService.pack(report.targetUser ?? report.targetUserId, me, {
 				schema: 'UserDetailedNotMe',
 			}),
-			assignee: report.assigneeId ? hint?.packedAssignee ?? this.userEntityService.pack(report.assignee ?? report.assigneeId, null, {
+			// return hint, or pack by relation, or fetch and pack by id, or null
+			targetInstance: hint?.packedTargetInstance ?? (
+				report.targetUserInstance
+					? this.instanceEntityService.pack(report.targetUserInstance, me)
+					: report.targetUserHost
+						? this.instancesRepository.findOneBy({ host: report.targetUserHost }).then(instance => instance
+							? this.instanceEntityService.pack(instance, me)
+							: null)
+						: null),
+			assignee: report.assigneeId ? hint?.packedAssignee ?? this.userEntityService.pack(report.assignee ?? report.assigneeId, me, {
 				schema: 'UserDetailedNotMe',
 			}) : null,
 			forwarded: report.forwarded,
@@ -61,21 +78,28 @@ export class AbuseUserReportEntityService {
 	@bindThis
 	public async packMany(
 		reports: MiAbuseUserReport[],
+		me?: MiUser | null,
 	) {
 		const _reporters = reports.map(({ reporter, reporterId }) => reporter ?? reporterId);
 		const _targetUsers = reports.map(({ targetUser, targetUserId }) => targetUser ?? targetUserId);
 		const _assignees = reports.map(({ assignee, assigneeId }) => assignee ?? assigneeId).filter(x => x != null);
 		const _userMap = await this.userEntityService.packMany(
 			[..._reporters, ..._targetUsers, ..._assignees],
-			null,
+			me,
 			{ schema: 'UserDetailedNotMe' },
 		).then(users => new Map(users.map(u => [u.id, u])));
+		const _targetInstances = reports
+			.map(({ targetUserInstance, targetUserHost }) => targetUserInstance ?? targetUserHost)
+			.filter((i): i is MiInstance | string => i != null);
+		const _instanceMap = await this.instanceEntityService.packMany(await this.instanceEntityService.fetchInstancesByHost(_targetInstances), me)
+			.then(instances => new Map(instances.map(i => [i.host, i])));
 		return Promise.all(
 			reports.map(report => {
 				const packedReporter = _userMap.get(report.reporterId);
 				const packedTargetUser = _userMap.get(report.targetUserId);
+				const packedTargetInstance = report.targetUserHost ? _instanceMap.get(report.targetUserHost) : undefined;
 				const packedAssignee = report.assigneeId != null ? _userMap.get(report.assigneeId) : undefined;
-				return this.pack(report, { packedReporter, packedTargetUser, packedAssignee });
+				return this.pack(report, { packedReporter, packedTargetUser, packedAssignee, packedTargetInstance }, me);
 			}),
 		);
 	}
diff --git a/packages/backend/src/core/entities/InstanceEntityService.ts b/packages/backend/src/core/entities/InstanceEntityService.ts
index a2ee4b0505..4ca4ff650b 100644
--- a/packages/backend/src/core/entities/InstanceEntityService.ts
+++ b/packages/backend/src/core/entities/InstanceEntityService.ts
@@ -4,6 +4,7 @@
  */
 
 import { Inject, Injectable } from '@nestjs/common';
+import { In } from 'typeorm';
 import type { Packed } from '@/misc/json-schema.js';
 import type { MiInstance } from '@/models/Instance.js';
 import { bindThis } from '@/decorators.js';
@@ -11,7 +12,7 @@ import { UtilityService } from '@/core/UtilityService.js';
 import { RoleService } from '@/core/RoleService.js';
 import { MiUser } from '@/models/User.js';
 import { DI } from '@/di-symbols.js';
-import { MiMeta } from '@/models/_.js';
+import type { InstancesRepository, MiMeta } from '@/models/_.js';
 
 @Injectable()
 export class InstanceEntityService {
@@ -19,6 +20,9 @@ export class InstanceEntityService {
 		@Inject(DI.meta)
 		private meta: MiMeta,
 
+		@Inject(DI.instancesRepository)
+		private readonly instancesRepository: InstancesRepository,
+
 		private roleService: RoleService,
 
 		private utilityService: UtilityService,
@@ -73,5 +77,28 @@ export class InstanceEntityService {
 	) {
 		return Promise.all(instances.map(x => this.pack(x, me)));
 	}
+
+	@bindThis
+	public async fetchInstancesByHost(instances: (MiInstance | MiInstance['host'])[]): Promise<MiInstance[]> {
+		const result: MiInstance[] = [];
+
+		const toFetch: string[] = [];
+		for (const instance of instances) {
+			if (typeof(instance) === 'string') {
+				toFetch.push(instance);
+			} else {
+				result.push(instance);
+			}
+		}
+
+		if (toFetch.length > 0) {
+			const fetched = await this.instancesRepository.findBy({
+				host: In(toFetch),
+			});
+			result.push(...fetched);
+		}
+
+		return result;
+	}
 }
 
diff --git a/packages/backend/src/core/entities/UserEntityService.ts b/packages/backend/src/core/entities/UserEntityService.ts
index 3524119ba1..326baaefd4 100644
--- a/packages/backend/src/core/entities/UserEntityService.ts
+++ b/packages/backend/src/core/entities/UserEntityService.ts
@@ -487,7 +487,10 @@ export class UserEntityService implements OnModuleInit {
 			includeSecrets: false,
 		}, options);
 
-		const user = typeof src === 'object' ? src : await this.usersRepository.findOneByOrFail({ id: src });
+		const user = typeof src === 'object' ? src : await this.usersRepository.findOneOrFail({
+			where: { id: src },
+			relations: { userProfile: true },
+		});
 
 		// migration
 		if (user.avatarId != null && user.avatarUrl === null) {
@@ -521,7 +524,7 @@ export class UserEntityService implements OnModuleInit {
 		const iAmModerator = me ? await this.roleService.isModerator(me as MiUser) : false;
 
 		const profile = isDetailed
-			? (opts.userProfile ?? await this.userProfilesRepository.findOneByOrFail({ userId: user.id }))
+			? (opts.userProfile ?? user.userProfile ?? await this.userProfilesRepository.findOneByOrFail({ userId: user.id }))
 			: null;
 
 		let relation: UserRelation | null = null;
@@ -556,7 +559,7 @@ export class UserEntityService implements OnModuleInit {
 			}
 		}
 
-		const mastoapi = !isDetailed ? opts.userProfile ?? await this.userProfilesRepository.findOneByOrFail({ userId: user.id }) : null;
+		const mastoapi = !isDetailed ? opts.userProfile ?? user.userProfile ?? await this.userProfilesRepository.findOneByOrFail({ userId: user.id }) : null;
 
 		const followingCount = profile == null ? null :
 			(profile.followingVisibility === 'public') || isMe || iAmModerator ? user.followingCount :
@@ -785,8 +788,13 @@ export class UserEntityService implements OnModuleInit {
 		const _users = users.filter((user): user is MiUser => typeof user !== 'string');
 		if (_users.length !== users.length) {
 			_users.push(
-				...await this.usersRepository.findBy({
-					id: In(users.filter((user): user is string => typeof user === 'string')),
+				...await this.usersRepository.find({
+					where: {
+						id: In(users.filter((user): user is string => typeof user === 'string')),
+					},
+					relations: {
+						userProfile: true,
+					},
 				}),
 			);
 		}
@@ -800,8 +808,20 @@ export class UserEntityService implements OnModuleInit {
 		let pinNotes: Map<MiUser['id'], MiUserNotePining[]> = new Map();
 
 		if (options?.schema !== 'UserLite') {
-			profilesMap = await this.userProfilesRepository.findBy({ userId: In(_userIds) })
-				.then(profiles => new Map(profiles.map(p => [p.userId, p])));
+			const _profiles: MiUserProfile[] = [];
+			const _profilesToFetch: string[] = [];
+			for (const user of _users) {
+				if (user.userProfile) {
+					_profiles.push(user.userProfile);
+				} else {
+					_profilesToFetch.push(user.id);
+				}
+			}
+			if (_profilesToFetch.length > 0) {
+				const fetched = await this.userProfilesRepository.findBy({ userId: In(_profilesToFetch) });
+				_profiles.push(...fetched);
+			}
+			profilesMap = new Map(_profiles.map(p => [p.userId, p]));
 
 			const meId = me ? me.id : null;
 			if (meId) {
diff --git a/packages/backend/src/models/AbuseUserReport.ts b/packages/backend/src/models/AbuseUserReport.ts
index d43ebf9342..8f8d759004 100644
--- a/packages/backend/src/models/AbuseUserReport.ts
+++ b/packages/backend/src/models/AbuseUserReport.ts
@@ -4,6 +4,7 @@
  */
 
 import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { MiInstance } from '@/models/Instance.js';
 import { id } from './util/id.js';
 import { MiUser } from './User.js';
 
@@ -88,11 +89,31 @@ export class MiAbuseUserReport {
 	})
 	public targetUserHost: string | null;
 
+	@ManyToOne(() => MiInstance, {
+		// TODO create a foreign key constraint after hazelnoot/labs/persisted-instance-blocks is merged
+		createForeignKeyConstraints: false,
+	})
+	@JoinColumn({
+		name: 'targetUserHost',
+		referencedColumnName: 'host',
+	})
+	public targetUserInstance: MiInstance | null;
+
 	@Index()
 	@Column('varchar', {
 		length: 128, nullable: true,
 		comment: '[Denormalized]',
 	})
 	public reporterHost: string | null;
+
+	@ManyToOne(() => MiInstance, {
+		// TODO create a foreign key constraint after hazelnoot/labs/persisted-instance-blocks is merged
+		createForeignKeyConstraints: false,
+	})
+	@JoinColumn({
+		name: 'reporterHost',
+		referencedColumnName: 'host',
+	})
+	public reporterInstance: MiInstance | null;
 	//#endregion
 }
diff --git a/packages/backend/src/models/User.ts b/packages/backend/src/models/User.ts
index 3ef5817672..2f13400944 100644
--- a/packages/backend/src/models/User.ts
+++ b/packages/backend/src/models/User.ts
@@ -8,6 +8,7 @@ import { type UserUnsignedFetchOption, userUnsignedFetchOptions } from '@/const.
 import { MiInstance } from '@/models/Instance.js';
 import { id } from './util/id.js';
 import { MiDriveFile } from './DriveFile.js';
+import type { MiUserProfile } from './UserProfile.js';
 
 @Entity('user')
 @Index(['usernameLower', 'host'], { unique: true })
@@ -395,6 +396,9 @@ export class MiUser {
 	})
 	public attributionDomains: string[];
 
+	@OneToOne('user_profile', (profile: MiUserProfile) => profile.user)
+	public userProfile: MiUserProfile | null;
+
 	constructor(data: Partial<MiUser>) {
 		if (data == null) return;
 
diff --git a/packages/backend/src/models/UserProfile.ts b/packages/backend/src/models/UserProfile.ts
index 29c453dd71..6ee72e6ddd 100644
--- a/packages/backend/src/models/UserProfile.ts
+++ b/packages/backend/src/models/UserProfile.ts
@@ -17,7 +17,7 @@ export class MiUserProfile {
 	@PrimaryColumn(id())
 	public userId: MiUser['id'];
 
-	@OneToOne(type => MiUser, {
+	@OneToOne(() => MiUser, user => user.userProfile, {
 		onDelete: 'CASCADE',
 	})
 	@JoinColumn()
diff --git a/packages/backend/src/server/api/endpoints/admin/abuse-user-reports.ts b/packages/backend/src/server/api/endpoints/admin/abuse-user-reports.ts
index 0dbfaae054..b8200c09aa 100644
--- a/packages/backend/src/server/api/endpoints/admin/abuse-user-reports.ts
+++ b/packages/backend/src/server/api/endpoints/admin/abuse-user-reports.ts
@@ -69,6 +69,11 @@ export const meta = {
 					nullable: false, optional: false,
 					ref: 'UserDetailedNotMe',
 				},
+				targetInstance: {
+					type: 'object',
+					nullable: true, optional: false,
+					ref: 'FederationInstance',
+				},
 				assignee: {
 					type: 'object',
 					nullable: true, optional: false,
@@ -115,7 +120,15 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private queryService: QueryService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const query = this.queryService.makePaginationQuery(this.abuseUserReportsRepository.createQueryBuilder('report'), ps.sinceId, ps.untilId);
+			const query = this.queryService.makePaginationQuery(this.abuseUserReportsRepository.createQueryBuilder('report'), ps.sinceId, ps.untilId)
+				.leftJoinAndSelect('report.targetUser', 'targetUser')
+				.leftJoinAndSelect('targetUser.userProfile', 'targetUserProfile')
+				.leftJoinAndSelect('report.targetUserInstance', 'targetUserInstance')
+				.leftJoinAndSelect('report.reporter', 'reporter')
+				.leftJoinAndSelect('reporter.userProfile', 'reporterProfile')
+				.leftJoinAndSelect('report.assignee', 'assignee')
+				.leftJoinAndSelect('assignee.userProfile', 'assigneeProfile')
+			;
 
 			switch (ps.state) {
 				case 'resolved': query.andWhere('report.resolved = TRUE'); break;
@@ -134,7 +147,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 			const reports = await query.limit(ps.limit).getMany();
 
-			return await this.abuseUserReportEntityService.packMany(reports);
+			return await this.abuseUserReportEntityService.packMany(reports, me);
 		});
 	}
 }
diff --git a/packages/backend/src/server/web/UrlPreviewService.ts b/packages/backend/src/server/web/UrlPreviewService.ts
index 2a300782c6..78b2204fbb 100644
--- a/packages/backend/src/server/web/UrlPreviewService.ts
+++ b/packages/backend/src/server/web/UrlPreviewService.ts
@@ -123,26 +123,45 @@ export class UrlPreviewService {
 		request: FastifyRequest<PreviewRoute>,
 		reply: FastifyReply,
 	): Promise<void> {
+		if (!this.meta.urlPreviewEnabled) {
+			return reply.code(403).send({
+				error: {
+					message: 'URL preview is disabled',
+					code: 'URL_PREVIEW_DISABLED',
+					id: '58b36e13-d2f5-0323-b0c6-76aa9dabefb8',
+				},
+			});
+		}
+
 		const url = request.query.url;
 		if (typeof url !== 'string' || !URL.canParse(url)) {
 			reply.code(400);
 			return;
 		}
 
+		// Enforce HTTP(S) for input URLs
+		const urlScheme = this.utilityService.getUrlScheme(url);
+		if (urlScheme !== 'http:' && urlScheme !== 'https:') {
+			reply.code(400);
+			return;
+		}
+
 		const lang = request.query.lang;
 		if (Array.isArray(lang)) {
 			reply.code(400);
 			return;
 		}
 
-		if (!this.meta.urlPreviewEnabled) {
-			return reply.code(403).send({
-				error: {
-					message: 'URL preview is disabled',
-					code: 'URL_PREVIEW_DISABLED',
-					id: '58b36e13-d2f5-0323-b0c6-76aa9dabefb8',
-				},
-			});
+		// Strip out hash (anchor)
+		const urlObj = new URL(url);
+		if (urlObj.hash) {
+			urlObj.hash = '';
+			const params = new URLSearchParams({ url: urlObj.href });
+			if (lang) params.set('lang', lang);
+			const newUrl = `/url?${params.toString()}`;
+
+			reply.redirect(newUrl, 301);
+			return;
 		}
 
 		// Check rate limit
@@ -151,7 +170,7 @@ export class UrlPreviewService {
 			return;
 		}
 
-		if (this.utilityService.isBlockedHost(this.meta.blockedHosts, new URL(url).host)) {
+		if (this.utilityService.isBlockedHost(this.meta.blockedHosts, urlObj.host)) {
 			return reply.code(403).send({
 				error: {
 					message: 'URL is blocked',
@@ -166,7 +185,7 @@ export class UrlPreviewService {
 			return;
 		}
 
-		const cacheKey = `${url}@${lang}@${cacheFormatVersion}`;
+		const cacheKey = getCacheKey(url, lang);
 		if (await this.sendCachedPreview(cacheKey, reply, fetch)) {
 			return;
 		}
@@ -217,6 +236,18 @@ export class UrlPreviewService {
 			// Await this to avoid hammering redis when a bunch of URLs are fetched at once
 			await this.previewCache.set(cacheKey, summary);
 
+			// Also cache the response URL in case of redirects
+			if (summary.url !== url) {
+				const responseCacheKey = getCacheKey(summary.url, lang);
+				await this.previewCache.set(responseCacheKey, summary);
+			}
+
+			// Also cache the ActivityPub URL, if different from the others
+			if (summary.activityPub && summary.activityPub !== summary.url) {
+				const apCacheKey = getCacheKey(summary.activityPub, lang);
+				await this.previewCache.set(apCacheKey, summary);
+			}
+
 			// Cache 1 day (matching redis), but only once we finalize the result
 			if (!summary.activityPub || summary.haveNoteLocally) {
 				reply.header('Cache-Control', 'public, max-age=86400');
@@ -533,3 +564,7 @@ export class UrlPreviewService {
 		return true;
 	}
 }
+
+function getCacheKey(url: string, lang = 'none') {
+	return `${url}@${lang}@${cacheFormatVersion}`;
+}
diff --git a/packages/backend/test/unit/AbuseReportNotificationService.ts b/packages/backend/test/unit/AbuseReportNotificationService.ts
index 6d555326fb..ee68b10f1b 100644
--- a/packages/backend/test/unit/AbuseReportNotificationService.ts
+++ b/packages/backend/test/unit/AbuseReportNotificationService.ts
@@ -367,8 +367,10 @@ describe('AbuseReportNotificationService', () => {
 					id: idService.gen(),
 					targetUserId: alice.id,
 					targetUser: alice,
+					targetUserInstance: null,
 					reporterId: bob.id,
 					reporter: bob,
+					reporterInstance: null,
 					assigneeId: null,
 					assignee: null,
 					resolved: false,
diff --git a/packages/frontend/package.json b/packages/frontend/package.json
index f5c7bcf1b4..640ebe70d6 100644
--- a/packages/frontend/package.json
+++ b/packages/frontend/package.json
@@ -60,6 +60,7 @@
 		"misskey-reversi": "workspace:*",
 		"moment": "^2.30.1",
 		"photoswipe": "5.4.4",
+		"promise-limit": "2.7.0",
 		"punycode.js": "2.3.1",
 		"rollup": "4.40.0",
 		"sanitize-html": "2.16.0",
diff --git a/packages/frontend/src/components/MkAbuseReport.vue b/packages/frontend/src/components/MkAbuseReport.vue
index c52fdb898e..5bf5380a1e 100644
--- a/packages/frontend/src/components/MkAbuseReport.vue
+++ b/packages/frontend/src/components/MkAbuseReport.vue
@@ -33,10 +33,28 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<MkFolder :withSpacer="false">
 			<template #icon><MkAvatar :user="report.targetUser" style="width: 18px; height: 18px;"/></template>
 			<template #label>{{ i18n.ts.target }}: <MkAcct :user="report.targetUser"/></template>
-			<template #suffix>#{{ report.targetUserId.toUpperCase() }}</template>
+			<template #suffix>{{ i18n.ts.id }}# {{ report.targetUserId }}</template>
 
-			<div style="height: 300px; --MI-stickyTop: 0; --MI-stickyBottom: 0;">
-				<RouterView :router="targetRouter"/>
+			<div style="--MI-stickyTop: 0; --MI-stickyBottom: 0;">
+				<admin-user :userId="report.targetUserId" :userHint="report.targetUser"></admin-user>
+			</div>
+		</MkFolder>
+
+		<MkFolder v-if="report.targetInstance" :withSpacer="false">
+			<template #icon>
+				<img
+					v-if="targetInstanceIcon"
+					:src="targetInstanceIcon"
+					:alt="i18n.tsx.instanceIconAlt({ name: report.targetInstance.name || report.targetInstance.host })"
+					:class="$style.instanceIcon"
+					class="icon"
+				/>
+			</template>
+			<template #label>{{ i18n.ts.instance }}: {{ report.targetInstance.name || report.targetInstance.host }}</template>
+			<template #suffix>{{ i18n.ts.id }}# {{ report.targetInstance.id }}</template>
+
+			<div style="--MI-stickyTop: 0; --MI-stickyBottom: 0;">
+				<instance-info :host="report.targetInstance.host" :instanceHint="report.targetInstance" :metaHint="metaHint"></instance-info>
 			</div>
 		</MkFolder>
 
@@ -44,23 +62,24 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<template #icon><i class="ti ti-message-2"></i></template>
 			<template #label>{{ i18n.ts.details }}</template>
 			<div class="_gaps_s">
-				<Mfm :text="report.comment" :isBlock="true" :linkNavigationBehavior="'window'"/>
+				<Mfm :text="report.comment" :parsedNodes="parsedComment" :isBlock="true" :linkNavigationBehavior="'window'" :author="report.reporter" :nyaize="false" :isAnim="false"/>
+				<SkUrlPreviewGroup :sourceNodes="parsedComment" :compact="false" :detail="false" :showAsQuote="true"/>
 			</div>
 		</MkFolder>
 
 		<MkFolder :withSpacer="false">
 			<template #icon><MkAvatar :user="report.reporter" style="width: 18px; height: 18px;"/></template>
 			<template #label>{{ i18n.ts.reporter }}: <MkAcct :user="report.reporter"/></template>
-			<template #suffix>#{{ report.reporterId.toUpperCase() }}</template>
+			<template #suffix>{{ i18n.ts.id }}# {{ report.reporterId }}</template>
 
-			<div style="height: 300px; --MI-stickyTop: 0; --MI-stickyBottom: 0;">
-				<RouterView :router="reporterRouter"/>
+			<div style="--MI-stickyTop: 0; --MI-stickyBottom: 0;">
+				<admin-user :userId="report.reporterId" :userHint="report.reporter"></admin-user>
 			</div>
 		</MkFolder>
 
 		<MkFolder :defaultOpen="false">
 			<template #icon><i class="ti ti-message-2"></i></template>
-			<template #label>{{ i18n.ts.moderationNote }}</template>
+			<template #label>{{ i18n.ts.staffNotes }}</template>
 			<template #suffix>{{ moderationNote.length > 0 ? '...' : i18n.ts.none }}</template>
 			<div class="_gaps_s">
 				<MkTextarea v-model="moderationNote" manualSave>
@@ -78,8 +97,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { provide, ref, watch } from 'vue';
+import { computed, provide, ref, watch } from 'vue';
 import * as Misskey from 'misskey-js';
+import * as mfm from '@transfem-org/sfm-js';
 import MkButton from '@/components/MkButton.vue';
 import MkSwitch from '@/components/MkSwitch.vue';
 import MkKeyValue from '@/components/MkKeyValue.vue';
@@ -91,6 +111,12 @@ import RouterView from '@/components/global/RouterView.vue';
 import MkTextarea from '@/components/MkTextarea.vue';
 import { copyToClipboard } from '@/utility/copy-to-clipboard.js';
 import { createRouter } from '@/router.js';
+import { getProxiedImageUrlNullable } from '@/utility/media-proxy';
+import InstanceInfo from '@/pages/instance-info.vue';
+import { iAmAdmin } from '@/i';
+import { misskeyApi } from '@/utility/misskey-api';
+import AdminUser from '@/pages/admin-user.vue';
+import SkUrlPreviewGroup from '@/components/SkUrlPreviewGroup.vue';
 
 const props = defineProps<{
 	report: Misskey.entities.AdminAbuseUserReportsResponse[number];
@@ -100,10 +126,27 @@ const emit = defineEmits<{
 	(ev: 'resolved', reportId: string): void;
 }>();
 
+/*
 const targetRouter = createRouter(`/admin/user/${props.report.targetUserId}`);
 targetRouter.init();
 const reporterRouter = createRouter(`/admin/user/${props.report.reporterId}`);
 reporterRouter.init();
+*/
+
+const parsedComment = computed(() => mfm.parse(props.report.comment));
+const metaHint = ref<Misskey.entities.AdminMetaResponse | undefined>(undefined);
+
+const targetInstanceIcon = computed(() => props.report.targetInstance?.faviconUrl
+	? getProxiedImageUrlNullable(props.report.targetInstance.faviconUrl, 'preview')
+	: props.report.targetInstance?.iconUrl
+		? getProxiedImageUrlNullable(props.report.targetInstance.iconUrl, 'preview')
+		: null);
+
+if (iAmAdmin) {
+	misskeyApi('admin/meta')
+		.then(meta => metaHint.value = meta)
+		.catch(err => console.error('[MkAbuseReport] Error fetching meta:', err));
+}
 
 const moderationNote = ref(props.report.moderationNote ?? '');
 
@@ -150,4 +193,8 @@ function showMenu(ev: MouseEvent) {
 </script>
 
 <style lang="scss" module>
+.instanceIcon {
+	width: 18px;
+	height: 18px;
+}
 </style>
diff --git a/packages/frontend/src/components/MkUrlPreview.vue b/packages/frontend/src/components/MkUrlPreview.vue
index 69a1540600..5d0e6e3df7 100644
--- a/packages/frontend/src/components/MkUrlPreview.vue
+++ b/packages/frontend/src/components/MkUrlPreview.vue
@@ -99,13 +99,24 @@ SPDX-License-Identifier: AGPL-3.0-only
 </div>
 </template>
 
+<script lang="ts">
+// eslint-disable-next-line import/order
+import type { summaly } from '@misskey-dev/summaly';
+
+export type SummalyResult = Awaited<ReturnType<typeof summaly>> & {
+	haveNoteLocally?: boolean,
+	linkAttribution?: {
+		userId: string,
+	}
+};
+</script>
+
 <script lang="ts" setup>
 import { defineAsyncComponent, onDeactivated, onUnmounted, ref } from 'vue';
 import { url as local } from '@@/js/config.js';
 import { versatileLang } from '@@/js/intl-const.js';
 import * as Misskey from 'misskey-js';
 import { maybeMakeRelative } from '@@/js/url.js';
-import type { summaly } from '@misskey-dev/summaly';
 import { i18n } from '@/i18n.js';
 import * as os from '@/os.js';
 import { deviceKind } from '@/utility/device-kind.js';
@@ -119,8 +130,6 @@ import DynamicNoteSimple from '@/components/DynamicNoteSimple.vue';
 import { $i } from '@/i';
 import { userPage } from '@/filters/user.js';
 
-type SummalyResult = Awaited<ReturnType<typeof summaly>>;
-
 const props = withDefaults(defineProps<{
 	url: string;
 	detail?: boolean;
@@ -128,12 +137,18 @@ const props = withDefaults(defineProps<{
 	showAsQuote?: boolean;
 	showActions?: boolean;
 	skipNoteIds?: (string | undefined)[];
+	previewHint?: SummalyResult;
+	noteHint?: Misskey.entities.Note | null;
+	attributionHint?: Misskey.entities.User | null;
 }>(), {
 	detail: false,
 	compact: false,
 	showAsQuote: false,
 	showActions: true,
 	skipNoteIds: undefined,
+	previewHint: undefined,
+	noteHint: undefined,
+	attributionHint: undefined,
 });
 
 const MOBILE_THRESHOLD = 500;
@@ -170,12 +185,35 @@ const tweetHeight = ref(150);
 const unknownUrl = ref(false);
 const theNote = ref<Misskey.entities.Note | null>(null);
 const fetchingTheNote = ref(false);
+const fetchingAttribution = ref<Promise<void> | null>(null);
 
 onDeactivated(() => {
 	playerEnabled.value = false;
 });
 
-async function fetchNote() {
+async function fetchAttribution(initial: boolean): Promise<void> {
+	if (!linkAttribution.value) return;
+	if (attributionUser.value) return;
+	if (fetchingAttribution.value) return fetchingAttribution.value;
+
+	return fetchingAttribution.value ??= (async (userId: string): Promise<void> => {
+		try {
+			if (initial && props.attributionHint !== undefined) {
+				attributionUser.value = props.attributionHint;
+			} else {
+				attributionUser.value = await misskeyApi('users/show', { userId });
+			}
+		} catch {
+			// makes the loading ellipsis vanish.
+			linkAttribution.value = null;
+		} finally {
+			// Reset promise to mark as done
+			fetchingAttribution.value = null;
+		}
+	})(linkAttribution.value.userId);
+}
+
+async function fetchNote(initial: boolean) {
 	if (!props.showAsQuote) return;
 	if (!activityPub.value) return;
 	if (theNote.value) return;
@@ -183,8 +221,15 @@ async function fetchNote() {
 
 	fetchingTheNote.value = true;
 	try {
-		const response = await misskeyApi('ap/show', { uri: activityPub.value });
+		const response = (initial && props.noteHint !== undefined)
+			? { type: 'Note', object: props.noteHint }
+			: await misskeyApi('ap/show', { uri: activityPub.value });
 		if (response.type !== 'Note') return;
+		if (!response.object) {
+			activityPub.value = null;
+			theNote.value = null;
+			return;
+		}
 		const theNoteId = response['object'].id;
 		if (theNoteId && props.skipNoteIds && props.skipNoteIds.includes(theNoteId)) {
 			hidePreview.value = true;
@@ -210,13 +255,16 @@ if (requestUrl.hostname === 'twitter.com' || requestUrl.hostname === 'mobile.twi
 	if (m) tweetId.value = m[1];
 }
 
+// This is now handled on the backend
+/*
 if (requestUrl.hostname === 'music.youtube.com' && requestUrl.pathname.match('^/(?:watch|channel)')) {
 	requestUrl.hostname = 'www.youtube.com';
 }
 
 requestUrl.hash = '';
+*/
 
-function refresh(withFetch = false) {
+function refresh(withFetch = false, initial = false) {
 	const params = new URLSearchParams({
 		url: requestUrl.href,
 		lang: versatileLang,
@@ -226,23 +274,21 @@ function refresh(withFetch = false) {
 	}
 
 	const headers = $i ? { Authorization: `Bearer ${$i.token}` } : undefined;
-	return fetching.value ??= window.fetch(`/url?${params.toString()}`, { headers })
-		.then(res => {
-			if (!res.ok) {
-				if (_DEV_) {
-					console.warn(`[HTTP${res.status}] Failed to fetch url preview`);
+	const fetchPromise: Promise<SummalyResult | null> = (initial && props.previewHint)
+		? Promise.resolve(props.previewHint)
+		: window.fetch(`/url?${params.toString()}`, { headers })
+			.then(res => {
+				if (!res.ok) {
+					if (_DEV_) {
+						console.warn(`[HTTP${res.status}] Failed to fetch url preview`);
+					}
+					return null;
 				}
-				return null;
-			}
 
-			return res.json();
-		})
-		.then(async (info: SummalyResult & {
-			haveNoteLocally?: boolean,
-			linkAttribution?: {
-				userId: string,
-			}
-		} | null) => {
+				return res.json();
+			});
+	return fetching.value ??= fetchPromise
+		.then(async (info: SummalyResult | null) => {
 			unknownUrl.value = info == null;
 			title.value = info?.title ?? null;
 			description.value = info?.description ?? null;
@@ -258,20 +304,15 @@ function refresh(withFetch = false) {
 			sensitive.value = info?.sensitive ?? false;
 			activityPub.value = info?.activityPub ?? null;
 			linkAttribution.value = info?.linkAttribution ?? null;
-			if (linkAttribution.value) {
-				try {
-					const response = await misskeyApi('users/show', { userId: linkAttribution.value.userId });
-					attributionUser.value = response;
-				} catch {
-					// makes the loading ellipsis vanish.
-					linkAttribution.value = null;
-				}
-			}
 
+			// These will be populated by the fetch* functions
+			attributionUser.value = null;
 			theNote.value = null;
-			if (info?.haveNoteLocally) {
-				await fetchNote();
-			}
+
+			await Promise.all([
+				fetchAttribution(initial),
+				fetchNote(initial),
+			]);
 		})
 		.finally(() => {
 			fetching.value = null;
@@ -304,7 +345,7 @@ onUnmounted(() => {
 });
 
 // Load initial data
-refresh();
+refresh(false, true);
 </script>
 
 <style lang="scss" module>
@@ -388,7 +429,7 @@ refresh();
 .body {
 	position: relative;
 	box-sizing: border-box;
-	padding: 16px;
+	padding: 16px !important; // Unfortunately needed to win a specificity race with MkNoteSimple / SkNoteSimple
 }
 
 .header {
diff --git a/packages/frontend/src/components/SkDateSeparatedList.vue b/packages/frontend/src/components/SkDateSeparatedList.vue
new file mode 100644
index 0000000000..239d0c1939
--- /dev/null
+++ b/packages/frontend/src/components/SkDateSeparatedList.vue
@@ -0,0 +1,55 @@
+<!--
+SPDX-FileCopyrightText: hazelnoot and other Sharkey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<div class="_gaps">
+	<template v-for="(item, index) in timeline" :key="item.id">
+		<slot v-if="item.type === 'item'" :id="item.id" :index="index" :item="item.data"></slot>
+		<slot v-else-if="item.type === 'date'" :id="item.id" :index="index" :prev="item.prev" :prevText="item.prevText" :next="item.next" :nextText="item.nextText" name="date">
+			<div :class="$style.dateDivider">
+				<span><i class="ti ti-chevron-up"></i> {{ item.nextText }}</span>
+				<span :class="$style.dateSeparator"></span>
+				<span>{{ item.prevText }} <i class="ti ti-chevron-down"></i></span>
+			</div>
+		</slot>
+	</template>
+</div>
+</template>
+
+<script setup lang="ts" generic="T extends { id: string; createdAt: string; }">
+import { computed } from 'vue';
+import { makeDateSeparatedTimelineComputedRef } from '@/utility/timeline-date-separate';
+
+const props = defineProps<{
+	items: T[],
+}>();
+
+const itemsRef = computed(() => props.items);
+const timeline = makeDateSeparatedTimelineComputedRef(itemsRef);
+</script>
+
+<style module lang="scss">
+// From room.vue
+.dateDivider {
+	display: flex;
+	font-size: 85%;
+	align-items: center;
+	justify-content: center;
+	gap: 0.5em;
+	opacity: 0.75;
+	border: solid 0.5px var(--MI_THEME-divider);
+	border-radius: 999px;
+	width: fit-content;
+	padding: 0.5em 1em;
+	margin: 0 auto;
+}
+
+// From room.vue
+.dateSeparator {
+	height: 1em;
+	width: 1px;
+	background: var(--MI_THEME-divider);
+}
+</style>
diff --git a/packages/frontend/src/components/SkUrlPreviewGroup.vue b/packages/frontend/src/components/SkUrlPreviewGroup.vue
new file mode 100644
index 0000000000..32b11d9db4
--- /dev/null
+++ b/packages/frontend/src/components/SkUrlPreviewGroup.vue
@@ -0,0 +1,348 @@
+<!--
+SPDX-FileCopyrightText: hazelnoot and other Sharkey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<div v-if="isRefreshing">
+	<MkLoading :class="$style.loading"></MkLoading>
+</div>
+<template v-else>
+	<MkUrlPreview
+		v-for="preview of urlPreviews"
+		:key="preview.url"
+		:url="preview.url"
+		:previewHint="preview"
+		:noteHint="preview.note"
+		:attributionHint="preview.attributionUser"
+		:detail="detail"
+		:compact="compact"
+		:showAsQuote="showAsQuote"
+		:showActions="showActions"
+		:skipNoteIds="skipNoteIds"
+	></MkUrlPreview>
+</template>
+</template>
+
+<script setup lang="ts">
+import * as Misskey from 'misskey-js';
+import * as mfm from '@transfem-org/sfm-js';
+import { computed, ref, watch } from 'vue';
+import { versatileLang } from '@@/js/intl-const';
+import promiseLimit from 'promise-limit';
+import type { SummalyResult } from '@/components/MkUrlPreview.vue';
+import { extractPreviewUrls } from '@/utility/extract-preview-urls';
+import { extractUrlFromMfm } from '@/utility/extract-url-from-mfm';
+import { $i } from '@/i';
+import { misskeyApi } from '@/utility/misskey-api';
+import MkUrlPreview from '@/components/MkUrlPreview.vue';
+import { getNoteUrls } from '@/utility/getNoteUrls';
+
+type Summary = SummalyResult & {
+	note?: Misskey.entities.Note | null;
+	attributionUser?: Misskey.entities.User | null;
+};
+
+type Limiter<T> = ReturnType<typeof promiseLimit<T>>;
+
+const props = withDefaults(defineProps<{
+	sourceUrls?: string[];
+	sourceNodes?: mfm.MfmNode[];
+	sourceText?: string;
+	sourceNote?: Misskey.entities.Note;
+
+	detail?: boolean;
+	compact?: boolean;
+	showAsQuote?: boolean;
+	showActions?: boolean;
+	skipNoteIds?: string[];
+}>(), {
+	sourceUrls: undefined,
+	sourceText: undefined,
+	sourceNodes: undefined,
+	sourceNote: undefined,
+
+	detail: undefined,
+	compact: undefined,
+	showAsQuote: undefined,
+	showActions: undefined,
+	skipNoteIds: () => [],
+});
+
+const urlPreviews = ref<Summary[]>([]);
+
+const urls = computed<string[]>(() => {
+	if (props.sourceUrls) {
+		return props.sourceUrls;
+	}
+
+	// sourceNodes > sourceText > sourceNote
+	const source =
+		props.sourceNodes ??
+		(props.sourceText ? mfm.parse(props.sourceText) : null) ??
+		(props.sourceNote?.text ? mfm.parse(props.sourceNote.text) : null);
+
+	if (source) {
+		if (props.sourceNote) {
+			return extractPreviewUrls(props.sourceNote, source);
+		} else {
+			return extractUrlFromMfm(source);
+		}
+	}
+
+	return [];
+});
+
+// todo un-ref these
+const isRefreshing = ref<Promise<void> | false>(false);
+const cachedNotes = ref(new Map<string, Misskey.entities.Note | null>());
+const cachedPreviews = ref(new Map<string, Summary | null>());
+const cachedUsers = new Map<string, Misskey.entities.User | null>();
+
+/**
+ * Refreshes the group.
+ * Calls are automatically de-duplicated.
+ */
+function refresh(): Promise<void> {
+	if (isRefreshing.value) return isRefreshing.value;
+
+	const promise = doRefresh();
+	promise.finally(() => isRefreshing.value = false);
+	isRefreshing.value = promise;
+	return promise;
+}
+
+/**
+ * Refreshes the group.
+ * Don't call this directly - use refresh() instead!
+ */
+async function doRefresh(): Promise<void> {
+	let previews = await fetchPreviews();
+
+	// Remove duplicates
+	previews = deduplicatePreviews(previews);
+
+	// Remove any with hidden notes
+	previews = previews.filter(preview => !preview.note || !props.skipNoteIds.includes(preview.note.id));
+
+	urlPreviews.value = previews;
+}
+
+async function fetchPreviews(): Promise<Summary[]> {
+	const userLimiter = promiseLimit<Misskey.entities.User | null>(4);
+	const noteLimiter = promiseLimit<Misskey.entities.Note | null>(2);
+	const summaryLimiter = promiseLimit<Summary | null>(5);
+
+	const summaries = await Promise.all(urls.value.map(url =>
+		summaryLimiter(async () => {
+			return await fetchPreview(url);
+		}).then(async (summary) => {
+			if (summary) {
+				await Promise.all([
+					attachNote(summary, noteLimiter),
+					attachAttribution(summary, userLimiter),
+				]);
+			}
+
+			return summary;
+		})));
+
+	return summaries.filter((preview): preview is Summary => preview != null);
+}
+
+async function fetchPreview(url: string): Promise<Summary | null> {
+	const cached = cachedPreviews.value.get(url);
+	if (cached) {
+		return cached;
+	}
+
+	const headers = $i ? { Authorization: `Bearer ${$i.token}` } : undefined;
+	const params = new URLSearchParams({ url, lang: versatileLang });
+	const res = await window.fetch(`/url?${params.toString()}`, { headers }).catch(() => null);
+
+	if (res?.ok) {
+		// Success - got the summary
+		const summary: Summary = await res.json();
+		cachedPreviews.value.set(url, summary);
+		if (summary.url !== url) {
+			cachedPreviews.value.set(summary.url, summary);
+		}
+		return summary;
+	}
+
+	// Failed, blocked, or not found
+	cachedPreviews.value.set(url, null);
+	return null;
+}
+
+async function attachNote(summary: Summary, noteLimiter: Limiter<Misskey.entities.Note | null>): Promise<void> {
+	if (props.showAsQuote && summary.activityPub && summary.haveNoteLocally) {
+		// Have to pull this out to make TS happy
+		const noteUri = summary.activityPub;
+
+		summary.note = await noteLimiter(async () => {
+			return await fetchNote(noteUri);
+		});
+	}
+}
+
+async function fetchNote(noteUri: string): Promise<Misskey.entities.Note | null> {
+	const cached = cachedNotes.value.get(noteUri);
+	if (cached) {
+		return cached;
+	}
+
+	const response = await misskeyApi('ap/show', { uri: noteUri }).catch(() => null);
+	if (response && response.type === 'Note') {
+		const note = response['object'];
+
+		// Success - got the note
+		cachedNotes.value.set(noteUri, note);
+		if (note.uri && note.uri !== noteUri) {
+			cachedNotes.value.set(note.uri, note);
+		}
+		return note;
+	}
+
+	// Failed, blocked, or not found
+	cachedNotes.value.set(noteUri, null);
+	return null;
+}
+
+async function attachAttribution(summary: Summary, userLimiter: Limiter<Misskey.entities.User | null>): Promise<void> {
+	if (summary.linkAttribution) {
+		// Have to pull this out to make TS happy
+		const userId = summary.linkAttribution.userId;
+
+		summary.attributionUser = await userLimiter(async () => {
+			return await fetchUser(userId);
+		});
+	}
+}
+
+async function fetchUser(userId: string): Promise<Misskey.entities.User | null> {
+	const cached = cachedUsers.get(userId);
+	if (cached) {
+		return cached;
+	}
+
+	const user = await misskeyApi('users/show', { userId }).catch(() => null);
+
+	cachedUsers.set(userId, user);
+	return user;
+}
+
+function deduplicatePreviews(previews: Summary[]): Summary[] {
+	// eslint-disable-next-line no-param-reassign
+	previews = previews
+		// Remove any previews with duplicate URL
+		.filter((preview, index) => !previews.some((p, i) => {
+			// Skip the current preview (don't count self as duplicate).
+			if (p === preview) return false;
+
+			// Skip differing URLs (not duplicate).
+			if (p.url !== preview.url) return false;
+
+			// Skip if we have AP and the other doesn't
+			if (preview.activityPub && !p.activityPub) return false;
+
+			// Skip if we have a note and the other doesn't
+			if (preview.note && !p.note) return false;
+
+			// Skip later previews (keep the earliest instance)...
+			// ...but only if we have AP or the later one doesn't...
+			// ...and only if we have note or the later one doesn't.
+			if (i > index && (preview.activityPub || !p.activityPub) && (preview.note || !p.note)) return false;
+
+			// If we get here, then "preview" is a duplicate of "p" and should be skipped.
+			return true;
+		}));
+
+	// eslint-disable-next-line no-param-reassign
+	previews = previews
+		// Remove any previews with duplicate AP
+		.filter((preview, index) => !previews.some((p, i) => {
+			// Skip the current preview (don't count self as duplicate).
+			if (p === preview) return false;
+
+			// Skip if we don't have AP
+			if (!preview.activityPub) return false;
+
+			// Skip if other does not have AP
+			if (!p.activityPub) return false;
+
+			// Skip differing URLs (not duplicate).
+			if (p.activityPub !== preview.activityPub) return false;
+
+			// Skip later previews (keep the earliest instance)
+			if (i > index) return false;
+
+			// If we get here, then "preview" is a duplicate of "p" and should be skipped.
+			return true;
+		}));
+
+	// eslint-disable-next-line no-param-reassign
+	previews = previews
+		// Remove any previews with duplicate note
+		.filter((preview, index) => !previews.some((p, i) => {
+			// Skip the current preview (don't count self as duplicate).
+			if (p === preview) return false;
+
+			// Skip if we don't have a note
+			if (!preview.note) return false;
+
+			// Skip if other does not have a note
+			if (!p.note) return false;
+
+			// Skip differing notes (not duplicate).
+			if (p.note.id !== preview.note.id) return false;
+
+			// Skip later previews (keep the earliest instance)
+			if (i > index) return false;
+
+			// If we get here, then "preview" is a duplicate of "p" and should be skipped.
+			return true;
+		}));
+
+	// eslint-disable-next-line no-param-reassign
+	previews = previews
+		// Remove any previews where the note duplicates url
+		.filter((preview, index) => !previews.some((p, i) => {
+			// Skip the current preview (don't count self as duplicate).
+			if (p === preview) return false;
+
+			// Skip if we have a note
+			if (preview.note) return false;
+
+			// Skip if other does not have a note
+			if (!p.note) return false;
+
+			// Skip later previews (keep the earliest instance)
+			if (i > index) return false;
+
+			const noteUrls = getNoteUrls(p.note);
+
+			// Remove if other duplicates our AP URL
+			if (preview.activityPub && noteUrls.includes(preview.activityPub)) return true;
+
+			// Remove if other duplicates our main URL
+			return noteUrls.includes(preview.url);
+		}));
+
+	return previews;
+}
+
+// Kick everything off, and watch for changes.
+watch(
+	[urls, () => props.showAsQuote, () => props.skipNoteIds],
+	() => refresh(),
+	{ immediate: true },
+);
+</script>
+
+<style module lang="scss">
+.loading {
+	box-shadow: 0 0 0 1px var(--MI_THEME-divider);
+	border-radius: var(--MI-radius-sm);
+}
+</style>
diff --git a/packages/frontend/src/components/global/PageWithHeader.vue b/packages/frontend/src/components/global/PageWithHeader.vue
index d2e59bf4ad..485ea687de 100644
--- a/packages/frontend/src/components/global/PageWithHeader.vue
+++ b/packages/frontend/src/components/global/PageWithHeader.vue
@@ -6,8 +6,8 @@ SPDX-License-Identifier: AGPL-3.0-only
 <template>
 <div ref="rootEl" :class="[$style.root, reversed ? '_pageScrollableReversed' : '_pageScrollable']">
 	<MkStickyContainer>
-		<template #header><MkPageHeader v-model:tab="tab" v-bind="pageHeaderProps"/></template>
-		<div :class="$style.body">
+		<template #header><MkPageHeader v-model:tab="tab" v-bind="pageHeaderProps" :class="{ _spacer: spacer }"/></template>
+		<div :class="[ $style.body, { _spacer: spacer } ]">
 			<MkSwiper v-if="swipable && (props.tabs?.length ?? 1) > 1" v-model:tab="tab" :class="$style.swiper" :tabs="props.tabs" :page="props.page">
 				<slot></slot>
 			</MkSwiper>
@@ -30,13 +30,16 @@ const props = withDefaults(defineProps<PageHeaderProps & {
 	reversed?: boolean;
 	swipable?: boolean;
 	page?: string;
+	spacer?: boolean;
 }>(), {
 	reversed: false,
 	swipable: true,
+	page: undefined,
+	spacer: false,
 });
 
 const pageHeaderProps = computed(() => {
-	const { reversed, ...rest } = props;
+	const { reversed, spacer, ...rest } = props;
 	return rest;
 });
 
diff --git a/packages/frontend/src/pages/admin-user.vue b/packages/frontend/src/pages/admin-user.vue
index 0596b165fd..3d17aca7d9 100644
--- a/packages/frontend/src/pages/admin-user.vue
+++ b/packages/frontend/src/pages/admin-user.vue
@@ -4,8 +4,8 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<PageWithHeader v-model:tab="tab" :actions="headerActions" :tabs="headerTabs">
-	<div class="_spacer" style="--MI_SPACER-w: 600px; --MI_SPACER-min: 16px; --MI_SPACER-max: 32px;">
+<PageWithHeader v-model:tab="tab" :actions="headerActions" :tabs="headerTabs" :spacer="true" style="--MI_SPACER-w: 600px; --MI_SPACER-min: 16px; --MI_SPACER-max: 32px;">
+	<div>
 		<FormSuspense :p="init">
 			<div v-if="tab === 'overview'" class="_gaps">
 				<div v-if="user" class="aeakzknw">
@@ -273,8 +273,14 @@ import SkBadgeStrip from '@/components/SkBadgeStrip.vue';
 const props = withDefaults(defineProps<{
 	userId: string;
 	initialTab?: string;
+	userHint?: Misskey.entities.UserDetailed;
+	infoHint?: Misskey.entities.AdminShowUserResponse;
+	ipsHint?: Misskey.entities.AdminGetUserIpsResponse;
 }>(), {
 	initialTab: 'overview',
+	userHint: undefined,
+	infoHint: undefined,
+	ipsHint: undefined,
 });
 
 const tab = ref(props.initialTab);
@@ -405,16 +411,23 @@ const announcementsPagination = {
 };
 const expandedRoles = ref([]);
 
-function createFetcher() {
-	return () => Promise.all([misskeyApi('users/show', {
-		userId: props.userId,
-	}), misskeyApi('admin/show-user', {
-		userId: props.userId,
-	}), iAmAdmin ? misskeyApi('admin/get-user-ips', {
-		userId: props.userId,
-	}) : Promise.resolve(null), iAmAdmin ? misskeyApi('ap/get', {
-		uri: `${url}/users/${props.userId}`,
-	}).catch(() => null) : null]).then(([_user, _info, _ips, _ap]) => {
+function createFetcher(withHint = true) {
+	return () => Promise.all([
+		(withHint && props.userHint) ? props.userHint : misskeyApi('users/show', {
+			userId: props.userId,
+		}),
+		(withHint && props.infoHint) ? props.infoHint : misskeyApi('admin/show-user', {
+			userId: props.userId,
+		}),
+		iAmAdmin
+			? (withHint && props.ipsHint) ? props.ipsHint : misskeyApi('admin/get-user-ips', {
+				userId: props.userId,
+			})
+			: null,
+		iAmAdmin ? misskeyApi('ap/get', {
+			uri: `${url}/users/${props.userId}`,
+		}).catch(() => null) : null],
+	).then(([_user, _info, _ips, _ap]) => {
 		user.value = _user;
 		info.value = _info;
 		ips.value = _ips;
@@ -432,7 +445,7 @@ function createFetcher() {
 
 async function refreshUser() {
 	// Not a typo - createFetcher() returns a function()
-	await createFetcher()();
+	await createFetcher(false)();
 }
 
 async function onMandatoryCWChanged(value: string) {
diff --git a/packages/frontend/src/pages/admin/abuses.vue b/packages/frontend/src/pages/admin/abuses.vue
index 4ec4372492..6531a3e49d 100644
--- a/packages/frontend/src/pages/admin/abuses.vue
+++ b/packages/frontend/src/pages/admin/abuses.vue
@@ -48,9 +48,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 			-->
 
 			<MkPagination v-slot="{items}" ref="reports" :pagination="pagination" :displayLimit="50">
-				<div class="_gaps">
-					<XAbuseReport v-for="report in items" :key="report.id" :report="report" @resolved="resolved"/>
-				</div>
+				<SkDateSeparatedList v-slot="{ item: report }" :items="items">
+					<XAbuseReport :report="report" @resolved="resolved"/>
+				</SkDateSeparatedList>
 			</MkPagination>
 		</div>
 	</div>
@@ -67,6 +67,7 @@ import { definePage } from '@/page.js';
 import MkButton from '@/components/MkButton.vue';
 import MkInfo from '@/components/MkInfo.vue';
 import { store } from '@/store.js';
+import SkDateSeparatedList from '@/components/SkDateSeparatedList.vue';
 
 const reports = useTemplateRef('reports');
 
diff --git a/packages/frontend/src/pages/instance-info.vue b/packages/frontend/src/pages/instance-info.vue
index b60bdf3a72..3f14cdabbe 100644
--- a/packages/frontend/src/pages/instance-info.vue
+++ b/packages/frontend/src/pages/instance-info.vue
@@ -4,8 +4,8 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<PageWithHeader v-model:tab="tab" :actions="headerActions" :tabs="headerTabs" :swipable="true">
-	<div v-if="instance" class="_spacer" style="--MI_SPACER-w: 600px; --MI_SPACER-min: 16px; --MI_SPACER-max: 32px;">
+<PageWithHeader v-model:tab="tab" :actions="headerActions" :tabs="headerTabs" :spacer="true" style="--MI_SPACER-w: 600px; --MI_SPACER-min: 16px; --MI_SPACER-max: 32px;">
+	<div v-if="instance">
 		<!-- This empty div is preserved to avoid merge conflicts -->
 		<div>
 			<div v-if="tab === 'overview'" class="_gaps">
@@ -238,9 +238,14 @@ import SkBadgeStrip from '@/components/SkBadgeStrip.vue';
 
 const $style = useCssModule();
 
-const props = defineProps<{
+const props = withDefaults(defineProps<{
 	host: string;
-}>();
+	metaHint?: Misskey.entities.AdminMetaResponse;
+	instanceHint?: Misskey.entities.FederationInstance;
+}>(), {
+	metaHint: undefined,
+	instanceHint: undefined,
+});
 
 const tab = ref('overview');
 
@@ -363,12 +368,16 @@ async function saveModerationNote() {
 	}
 }
 
-async function fetch(): Promise<void> {
+async function fetch(withHint = false): Promise<void> {
 	const [m, i] = await Promise.all([
-		iAmAdmin ? misskeyApi('admin/meta') : null,
-		misskeyApi('federation/show-instance', {
-			host: props.host,
-		}),
+		(withHint && props.metaHint)
+			? props.metaHint
+			: iAmAdmin ? misskeyApi('admin/meta') : null,
+		(withHint && props.instanceHint)
+			? props.instanceHint
+			: misskeyApi('federation/show-instance', {
+				host: props.host,
+			}),
 	]);
 	meta.value = m;
 	instance.value = i;
@@ -531,7 +540,7 @@ async function severAllFollowRelations(): Promise<void> {
 	});
 }
 
-fetch();
+fetch(true);
 
 const headerActions = computed(() => [{
 	text: `https://${props.host}`,
diff --git a/packages/frontend/src/utility/extract-preview-urls.ts b/packages/frontend/src/utility/extract-preview-urls.ts
index 5fc9c87a32..e3bd62c993 100644
--- a/packages/frontend/src/utility/extract-preview-urls.ts
+++ b/packages/frontend/src/utility/extract-preview-urls.ts
@@ -3,35 +3,18 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import * as config from '@@/js/config.js';
 import type * as Misskey from 'misskey-js';
 import type * as mfm from '@transfem-org/sfm-js';
 import { extractUrlFromMfm } from '@/utility/extract-url-from-mfm.js';
+import { getNoteUrls } from '@/utility/getNoteUrls';
 
 /**
  * Extracts all previewable URLs from a note.
  */
 export function extractPreviewUrls(note: Misskey.entities.Note, contents: mfm.MfmNode[]): string[] {
 	const links = extractUrlFromMfm(contents);
-	return links.filter(url =>
-		// Remote note
-		url !== note.url &&
-		url !== note.uri &&
-		// Local note
-		url !== `${config.url}/notes/${note.id}` &&
-		// Remote reply
-		url !== note.reply?.url &&
-		url !== note.reply?.uri &&
-		// Local reply
-		url !== `${config.url}/notes/${note.reply?.id}` &&
-		// Remote renote or quote
-		url !== note.renote?.url &&
-		url !== note.renote?.uri &&
-		// Local renote or quote
-		url !== `${config.url}/notes/${note.renote?.id}` &&
-		// Remote renote *of* a quote
-		url !== note.renote?.renote?.url &&
-		url !== note.renote?.renote?.uri &&
-		// Local renote *of* a quote
-		url !== `${config.url}/notes/${note.renote?.renote?.id}`);
+	if (links.length < 0) return [];
+
+	const self = getNoteUrls(note);
+	return links.filter(url => !self.includes(url));
 }
diff --git a/packages/frontend/src/utility/getNoteUrls.ts b/packages/frontend/src/utility/getNoteUrls.ts
new file mode 100644
index 0000000000..efd014cbf0
--- /dev/null
+++ b/packages/frontend/src/utility/getNoteUrls.ts
@@ -0,0 +1,44 @@
+/*
+ * SPDX-FileCopyrightText: hazelnoot and other Sharkey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import * as config from '@@/js/config.js';
+import type * as Misskey from 'misskey-js';
+
+export function getNoteUrls(note: Misskey.entities.Note): string[] {
+	const urls: string[] = [
+		// Any note
+		`${config.url}/notes/${note.id}`,
+	];
+
+	// Remote note
+	if (note.url) urls.push(note.url);
+	if (note.uri) urls.push(note.uri);
+
+	if (note.reply) {
+		// Any Reply
+		urls.push(`${config.url}/notes/${note.reply.id}`);
+		// Remote Reply
+		if (note.reply.url) urls.push(note.reply.url);
+		if (note.reply.uri) urls.push(note.reply.uri);
+	}
+
+	if (note.renote) {
+		// Any Renote
+		urls.push(`${config.url}/notes/${note.renote.id}`);
+		// Remote Renote
+		if (note.renote.url) urls.push(note.renote.url);
+		if (note.renote.uri) urls.push(note.renote.uri);
+	}
+
+	if (note.renote?.renote) {
+		// Any Quote
+		urls.push(`${config.url}/notes/${note.renote.renote.id}`);
+		// Remote Quote
+		if (note.renote.renote.url) urls.push(note.renote.renote.url);
+		if (note.renote.renote.uri) urls.push(note.renote.renote.uri);
+	}
+
+	return urls;
+}
diff --git a/packages/frontend/src/utility/timeline-date-separate.ts b/packages/frontend/src/utility/timeline-date-separate.ts
index e1bc9790b9..ef946b11d6 100644
--- a/packages/frontend/src/utility/timeline-date-separate.ts
+++ b/packages/frontend/src/utility/timeline-date-separate.ts
@@ -4,7 +4,7 @@
  */
 
 import { computed } from 'vue';
-import type { Ref } from 'vue';
+import type { Ref, ComputedRef } from 'vue';
 
 export function getDateText(dateInstance: Date) {
 	const date = dateInstance.getDate();
@@ -25,7 +25,7 @@ export type DateSeparetedTimelineItem<T> = {
 	nextText: string;
 };
 
-export function makeDateSeparatedTimelineComputedRef<T extends { id: string; createdAt: string; }>(items: Ref<T[]>) {
+export function makeDateSeparatedTimelineComputedRef<T extends { id: string; createdAt: string; }>(items: Ref<T[]> | ComputedRef<T[]>) {
 	return computed<DateSeparetedTimelineItem<T>[]>(() => {
 		const tl: DateSeparetedTimelineItem<T>[] = [];
 		for (let i = 0; i < items.value.length; i++) {
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index 5e91fb14ac..b1d5f63a8b 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -6198,6 +6198,7 @@ export type operations = {
               assigneeId: string | null;
               reporter: components['schemas']['UserDetailedNotMe'];
               targetUser: components['schemas']['UserDetailedNotMe'];
+              targetInstance: components['schemas']['FederationInstance'] | null;
               assignee: components['schemas']['UserDetailedNotMe'] | null;
               forwarded: boolean;
               /** @enum {string|null} */