enhance(backend): pugをやめ、JSXベースのテンプレートに変更 (#16908)

* enhance(backend): pugをやめ、JSXベースのテンプレートに変更 (to misskey-dev dev branch) (#16889) * wip * wip * wip * wip * fix lint * attempt to fix test * fix * fix * fix: oauthページの描画がおかしい問題を修正 * typo [ci skip] * fix * fix * fix * fix * fix * refactor * fix * fix * fix broken lockfile * fix: expose supported languages as global variable * remove i18n package from root as it is no longer required [ci skip] * fix * fix: add i18n package.json to Docker target-builder stage for federation tests (#16909) * Initial plan * fix: add i18n package.json to Docker target-builder stage for federation tests Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com> --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com> * fix: followup-test-federation for enh-remove-pug (#16910) * fix: followup-test-federation for enh-remove-pug * Revert "fix: add i18n package.json to Docker target-builder stage for federation tests (#16909)" This reverts commit 14313468d3. * fix: CSSが読み込まれない場合がある問題を修正 * fix [ci skip] * fix: propsのデフォルト値をnull合体演算子から論理和演算子に変更（空文字に対処するため） * remove @types/pug * enhance: bootloaderを埋め込むように * fix possible race condition * remove esbuild --------- Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com> Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com> Co-authored-by: おさむのひと <46447427+samunohito@users.noreply.github.com>
2026-05-04 15:26:08 +02:00 · 2025-12-01 18:36:55 +09:00
parent e1b6e9d4b6
commit f222d7e24d
70 changed files with 1507 additions and 948 deletions
--- a/packages/backend/src/server/ServerModule.ts
+++ b/packages/backend/src/server/ServerModule.ts
@@ -25,6 +25,7 @@ import { SignupApiService } from './api/SignupApiService.js';
 import { StreamingApiServerService } from './api/StreamingApiServerService.js';
 import { OpenApiServerService } from './api/openapi/OpenApiServerService.js';
 import { ClientServerService } from './web/ClientServerService.js';
+import { HtmlTemplateService } from './web/HtmlTemplateService.js';
 import { FeedService } from './web/FeedService.js';
 import { UrlPreviewService } from './web/UrlPreviewService.js';
 import { ClientLoggerService } from './web/ClientLoggerService.js';
@@ -58,6 +59,7 @@ import { SigninWithPasskeyApiService } from './api/SigninWithPasskeyApiService.j
 	providers: [
 		ClientServerService,
 		ClientLoggerService,
+		HtmlTemplateService,
 		FeedService,
 		HealthServerService,
 		UrlPreviewService,
--- a/packages/backend/src/server/oauth/OAuth2ProviderService.ts
+++ b/packages/backend/src/server/oauth/OAuth2ProviderService.ts
@@ -12,8 +12,6 @@ import ipaddr from 'ipaddr.js';
 import oauth2orize, { type OAuth2, AuthorizationError, ValidateFunctionArity2, OAuth2Req, MiddlewareRequest } from 'oauth2orize';
 import oauth2Pkce from 'oauth2orize-pkce';
 import fastifyCors from '@fastify/cors';
-import fastifyView from '@fastify/view';
-import pug from 'pug';
 import bodyParser from 'body-parser';
 import fastifyExpress from '@fastify/express';
 import { verifyChallenge } from 'pkce-challenge';
@@ -31,6 +29,8 @@ import { MemoryKVCache } from '@/misc/cache.js';
 import { LoggerService } from '@/core/LoggerService.js';
 import Logger from '@/logger.js';
 import { StatusError } from '@/misc/status-error.js';
+import { HtmlTemplateService } from '@/server/web/HtmlTemplateService.js';
+import { OAuthPage } from '@/server/web/views/oauth.js';
 import type { ServerResponse } from 'node:http';
 import type { FastifyInstance } from 'fastify';

@@ -273,6 +273,7 @@ export class OAuth2ProviderService {
 		private usersRepository: UsersRepository,
 		private cacheService: CacheService,
 		loggerService: LoggerService,
+		private htmlTemplateService: HtmlTemplateService,
 	) {
 		this.#logger = loggerService.getLogger('oauth');

@@ -406,24 +407,16 @@ export class OAuth2ProviderService {
 			this.#logger.info(`Rendering authorization page for "${oauth2.client.name}"`);

 			reply.header('Cache-Control', 'no-store');
-			return await reply.view('oauth', {
+			return await HtmlTemplateService.replyHtml(reply, OAuthPage({
+				...await this.htmlTemplateService.getCommonData(),
 				transactionId: oauth2.transactionID,
 				clientName: oauth2.client.name,
-				clientLogo: oauth2.client.logo,
-				scope: oauth2.req.scope.join(' '),
-			});
+				clientLogo: oauth2.client.logo ?? undefined,
+				scope: oauth2.req.scope,
+			}));
 		});
 		fastify.post('/decision', async () => { });

-		fastify.register(fastifyView, {
-			root: fileURLToPath(new URL('../web/views', import.meta.url)),
-			engine: { pug },
-			defaultContext: {
-				version: this.config.version,
-				config: this.config,
-			},
-		});
-
 		await fastify.register(fastifyExpress);
 		fastify.use('/authorize', this.#server.authorize(((areq, done) => {
 			(async (): Promise<Parameters<typeof done>> => {
--- a/packages/backend/src/server/web/ClientServerService.ts
+++ b/packages/backend/src/server/web/ClientServerService.ts
@@ -9,20 +9,16 @@ import { fileURLToPath } from 'node:url';
 import { Inject, Injectable } from '@nestjs/common';
 import ms from 'ms';
 import sharp from 'sharp';
-import pug from 'pug';
 import { In, IsNull } from 'typeorm';
 import fastifyStatic from '@fastify/static';
-import fastifyView from '@fastify/view';
 import fastifyProxy from '@fastify/http-proxy';
 import vary from 'vary';
 import type { Config } from '@/config.js';
-import { getNoteSummary } from '@/misc/get-note-summary.js';
 import { DI } from '@/di-symbols.js';
 import * as Acct from '@/misc/acct.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { PageEntityService } from '@/core/entities/PageEntityService.js';
-import { MetaEntityService } from '@/core/entities/MetaEntityService.js';
 import { GalleryPostEntityService } from '@/core/entities/GalleryPostEntityService.js';
 import { ClipEntityService } from '@/core/entities/ClipEntityService.js';
 import { ChannelEntityService } from '@/core/entities/ChannelEntityService.js';
@@ -41,14 +37,33 @@ import type {
 } from '@/models/_.js';
 import type Logger from '@/logger.js';
 import { handleRequestRedirectToOmitSearch } from '@/misc/fastify-hook-handlers.js';
+import { htmlSafeJsonStringify } from '@/misc/json-stringify-html-safe.js';
 import { bindThis } from '@/decorators.js';
 import { FlashEntityService } from '@/core/entities/FlashEntityService.js';
-import { RoleService } from '@/core/RoleService.js';
 import { ReversiGameEntityService } from '@/core/entities/ReversiGameEntityService.js';
 import { AnnouncementEntityService } from '@/core/entities/AnnouncementEntityService.js';
 import { FeedService } from './FeedService.js';
 import { UrlPreviewService } from './UrlPreviewService.js';
 import { ClientLoggerService } from './ClientLoggerService.js';
+import { HtmlTemplateService } from './HtmlTemplateService.js';
+
+import { BasePage } from './views/base.js';
+import { UserPage } from './views/user.js';
+import { NotePage } from './views/note.js';
+import { PagePage } from './views/page.js';
+import { ClipPage } from './views/clip.js';
+import { FlashPage } from './views/flash.js';
+import { GalleryPostPage } from './views/gallery-post.js';
+import { ChannelPage } from './views/channel.js';
+import { ReversiGamePage } from './views/reversi-game.js';
+import { AnnouncementPage } from './views/announcement.js';
+import { BaseEmbed } from './views/base-embed.js';
+import { InfoCardPage } from './views/info-card.js';
+import { BiosPage } from './views/bios.js';
+import { CliPage } from './views/cli.js';
+import { FlushPage } from './views/flush.js';
+import { ErrorPage } from './views/error.js';
+
 import type { FastifyError, FastifyInstance, FastifyPluginOptions, FastifyReply } from 'fastify';

 const _filename = fileURLToPath(import.meta.url);
@@ -62,20 +77,6 @@ const frontendViteOut = `${_dirname}/../../../../../built/_frontend_vite_/`;
 const frontendEmbedViteOut = `${_dirname}/../../../../../built/_frontend_embed_vite_/`;
 const tarball = `${_dirname}/../../../../../built/tarball/`;

-const ESCAPE_LOOKUP = {
-	'&': '\\u0026',
-	'>': '\\u003e',
-	'<': '\\u003c',
-	'\u2028': '\\u2028',
-	'\u2029': '\\u2029',
-} as Record<string, string>;
-
-const ESCAPE_REGEX = /[&><\u2028\u2029]/g;
-
-function htmlSafeJsonStringify(obj: any): string {
-	return JSON.stringify(obj).replace(ESCAPE_REGEX, x => ESCAPE_LOOKUP[x]);
-}
-
@Injectable()
 export class ClientServerService {
 	private logger: Logger;
@@ -121,7 +122,6 @@ export class ClientServerService {
 		private userEntityService: UserEntityService,
 		private noteEntityService: NoteEntityService,
 		private pageEntityService: PageEntityService,
-		private metaEntityService: MetaEntityService,
 		private galleryPostEntityService: GalleryPostEntityService,
 		private clipEntityService: ClipEntityService,
 		private channelEntityService: ChannelEntityService,
@@ -129,7 +129,7 @@ export class ClientServerService {
 		private announcementEntityService: AnnouncementEntityService,
 		private urlPreviewService: UrlPreviewService,
 		private feedService: FeedService,
-		private roleService: RoleService,
+		private htmlTemplateService: HtmlTemplateService,
 		private clientLoggerService: ClientLoggerService,
 	) {
 		//this.createServer = this.createServer.bind(this);
@@ -195,38 +195,10 @@ export class ClientServerService {
 		return (manifest);
 	}

-	@bindThis
-	private async generateCommonPugData(meta: MiMeta) {
-		return {
-			instanceName: meta.name ?? 'Misskey',
-			icon: meta.iconUrl,
-			appleTouchIcon: meta.app512IconUrl,
-			themeColor: meta.themeColor,
-			serverErrorImageUrl: meta.serverErrorImageUrl ?? 'https://xn--931a.moe/assets/error.jpg',
-			infoImageUrl: meta.infoImageUrl ?? 'https://xn--931a.moe/assets/info.jpg',
-			notFoundImageUrl: meta.notFoundImageUrl ?? 'https://xn--931a.moe/assets/not-found.jpg',
-			instanceUrl: this.config.url,
-			metaJson: htmlSafeJsonStringify(await this.metaEntityService.packDetailed(meta)),
-			now: Date.now(),
-			federationEnabled: this.meta.federation !== 'none',
-		};
-	}
-
 	@bindThis
 	public createServer(fastify: FastifyInstance, options: FastifyPluginOptions, done: (err?: Error) => void) {
 		const configUrl = new URL(this.config.url);

-		fastify.register(fastifyView, {
-			root: _dirname + '/views',
-			engine: {
-				pug: pug,
-			},
-			defaultContext: {
-				version: this.config.version,
-				config: this.config,
-			},
-		});
-
 		fastify.addHook('onRequest', (request, reply, done) => {
 			// クリックジャッキング防止のためiFrameの中に入れられないようにする
 			reply.header('X-Frame-Options', 'DENY');
@@ -427,16 +399,15 @@ export class ClientServerService {

 		//#endregion

-		const renderBase = async (reply: FastifyReply, data: { [key: string]: any } = {}) => {
+		const renderBase = async (reply: FastifyReply, data: Partial<Parameters<typeof BasePage>[0]> = {}) => {
 			reply.header('Cache-Control', 'public, max-age=30');
-			return await reply.view('base', {
-				img: this.meta.bannerUrl,
-				url: this.config.url,
+			return await HtmlTemplateService.replyHtml(reply, BasePage({
+				img: this.meta.bannerUrl ?? undefined,
 				title: this.meta.name ?? 'Misskey',
-				desc: this.meta.description,
-				...await this.generateCommonPugData(this.meta),
+				desc: this.meta.description ?? undefined,
+				...await this.htmlTemplateService.getCommonData(),
 				...data,
-			});
+			}));
 		};

 		// URL preview endpoint
@@ -518,11 +489,6 @@ export class ClientServerService {
 				)
 			) {
 				const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
-				const me = profile.fields
-					? profile.fields
-						.filter(filed => filed.value != null && filed.value.match(/^https?:/))
-						.map(field => field.value)
-					: [];

 				reply.header('Cache-Control', 'public, max-age=15');
 				if (profile.preventAiLearning) {
@@ -535,15 +501,15 @@ export class ClientServerService {
 					userProfile: profile,
 				});

-				return await reply.view('user', {
-					user, profile, me,
-					avatarUrl: _user.avatarUrl,
+				return await HtmlTemplateService.replyHtml(reply, UserPage({
+					user: _user,
+					profile,
 					sub: request.params.sub,
-					...await this.generateCommonPugData(this.meta),
-					clientCtx: htmlSafeJsonStringify({
+					...await this.htmlTemplateService.getCommonData(),
+					clientCtxJson: htmlSafeJsonStringify({
 						user: _user,
 					}),
-				});
+				}));
 			} else {
 				// リモートユーザーなので
 				// モデレータがAPI経由で参照可能にするために404にはしない
@@ -594,17 +560,14 @@ export class ClientServerService {
 					reply.header('X-Robots-Tag', 'noimageai');
 					reply.header('X-Robots-Tag', 'noai');
 				}
-				return await reply.view('note', {
+				return await HtmlTemplateService.replyHtml(reply, NotePage({
 					note: _note,
 					profile,
-					avatarUrl: _note.user.avatarUrl,
-					// TODO: Let locale changeable by instance setting
-					summary: getNoteSummary(_note),
-					...await this.generateCommonPugData(this.meta),
-					clientCtx: htmlSafeJsonStringify({
+					...await this.htmlTemplateService.getCommonData(),
+					clientCtxJson: htmlSafeJsonStringify({
 						note: _note,
 					}),
-				});
+				}));
 			} else {
 				return await renderBase(reply);
 			}
@@ -637,12 +600,11 @@ export class ClientServerService {
 					reply.header('X-Robots-Tag', 'noimageai');
 					reply.header('X-Robots-Tag', 'noai');
 				}
-				return await reply.view('page', {
+				return await HtmlTemplateService.replyHtml(reply, PagePage({
 					page: _page,
 					profile,
-					avatarUrl: _page.user.avatarUrl,
-					...await this.generateCommonPugData(this.meta),
-				});
+					...await this.htmlTemplateService.getCommonData(),
+				}));
 			} else {
 				return await renderBase(reply);
 			}
@@ -662,12 +624,11 @@ export class ClientServerService {
 					reply.header('X-Robots-Tag', 'noimageai');
 					reply.header('X-Robots-Tag', 'noai');
 				}
-				return await reply.view('flash', {
+				return await HtmlTemplateService.replyHtml(reply, FlashPage({
 					flash: _flash,
 					profile,
-					avatarUrl: _flash.user.avatarUrl,
-					...await this.generateCommonPugData(this.meta),
-				});
+					...await this.htmlTemplateService.getCommonData(),
+				}));
 			} else {
 				return await renderBase(reply);
 			}
@@ -687,15 +648,14 @@ export class ClientServerService {
 					reply.header('X-Robots-Tag', 'noimageai');
 					reply.header('X-Robots-Tag', 'noai');
 				}
-				return await reply.view('clip', {
+				return await HtmlTemplateService.replyHtml(reply, ClipPage({
 					clip: _clip,
 					profile,
-					avatarUrl: _clip.user.avatarUrl,
-					...await this.generateCommonPugData(this.meta),
-					clientCtx: htmlSafeJsonStringify({
+					...await this.htmlTemplateService.getCommonData(),
+					clientCtxJson: htmlSafeJsonStringify({
 						clip: _clip,
 					}),
-				});
+				}));
 			} else {
 				return await renderBase(reply);
 			}
@@ -713,12 +673,11 @@ export class ClientServerService {
 					reply.header('X-Robots-Tag', 'noimageai');
 					reply.header('X-Robots-Tag', 'noai');
 				}
-				return await reply.view('gallery-post', {
-					post: _post,
+				return await HtmlTemplateService.replyHtml(reply, GalleryPostPage({
+					galleryPost: _post,
 					profile,
-					avatarUrl: _post.user.avatarUrl,
-					...await this.generateCommonPugData(this.meta),
-				});
+					...await this.htmlTemplateService.getCommonData(),
+				}));
 			} else {
 				return await renderBase(reply);
 			}
@@ -733,10 +692,10 @@ export class ClientServerService {
 			if (channel) {
 				const _channel = await this.channelEntityService.pack(channel);
 				reply.header('Cache-Control', 'public, max-age=15');
-				return await reply.view('channel', {
+				return await HtmlTemplateService.replyHtml(reply, ChannelPage({
 					channel: _channel,
-					...await this.generateCommonPugData(this.meta),
-				});
+					...await this.htmlTemplateService.getCommonData(),
+				}));
 			} else {
 				return await renderBase(reply);
 			}
@@ -751,10 +710,10 @@ export class ClientServerService {
 			if (game) {
 				const _game = await this.reversiGameEntityService.packDetail(game);
 				reply.header('Cache-Control', 'public, max-age=3600');
-				return await reply.view('reversi-game', {
-					game: _game,
-					...await this.generateCommonPugData(this.meta),
-				});
+				return await HtmlTemplateService.replyHtml(reply, ReversiGamePage({
+					reversiGame: _game,
+					...await this.htmlTemplateService.getCommonData(),
+				}));
 			} else {
 				return await renderBase(reply);
 			}
@@ -770,10 +729,10 @@ export class ClientServerService {
 			if (announcement) {
 				const _announcement = await this.announcementEntityService.pack(announcement);
 				reply.header('Cache-Control', 'public, max-age=3600');
-				return await reply.view('announcement', {
+				return await HtmlTemplateService.replyHtml(reply, AnnouncementPage({
 					announcement: _announcement,
-					...await this.generateCommonPugData(this.meta),
-				});
+					...await this.htmlTemplateService.getCommonData(),
+				}));
 			} else {
 				return await renderBase(reply);
 			}
@@ -806,13 +765,13 @@ export class ClientServerService {
 			const _user = await this.userEntityService.pack(user);

 			reply.header('Cache-Control', 'public, max-age=3600');
-			return await reply.view('base-embed', {
+			return await HtmlTemplateService.replyHtml(reply, BaseEmbed({
 				title: this.meta.name ?? 'Misskey',
-				...await this.generateCommonPugData(this.meta),
-				embedCtx: htmlSafeJsonStringify({
+				...await this.htmlTemplateService.getCommonData(),
+				embedCtxJson: htmlSafeJsonStringify({
 					user: _user,
 				}),
-			});
+			}));
 		});

 		fastify.get<{ Params: { note: string; } }>('/embed/notes/:note', async (request, reply) => {
@@ -832,13 +791,13 @@ export class ClientServerService {
 			const _note = await this.noteEntityService.pack(note, null, { detail: true });

 			reply.header('Cache-Control', 'public, max-age=3600');
-			return await reply.view('base-embed', {
+			return await HtmlTemplateService.replyHtml(reply, BaseEmbed({
 				title: this.meta.name ?? 'Misskey',
-				...await this.generateCommonPugData(this.meta),
-				embedCtx: htmlSafeJsonStringify({
+				...await this.htmlTemplateService.getCommonData(),
+				embedCtxJson: htmlSafeJsonStringify({
 					note: _note,
 				}),
-			});
+			}));
 		});

 		fastify.get<{ Params: { clip: string; } }>('/embed/clips/:clip', async (request, reply) => {
@@ -853,48 +812,46 @@ export class ClientServerService {
 			const _clip = await this.clipEntityService.pack(clip);

 			reply.header('Cache-Control', 'public, max-age=3600');
-			return await reply.view('base-embed', {
+			return await HtmlTemplateService.replyHtml(reply, BaseEmbed({
 				title: this.meta.name ?? 'Misskey',
-				...await this.generateCommonPugData(this.meta),
-				embedCtx: htmlSafeJsonStringify({
+				...await this.htmlTemplateService.getCommonData(),
+				embedCtxJson: htmlSafeJsonStringify({
 					clip: _clip,
 				}),
-			});
+			}));
 		});

 		fastify.get('/embed/*', async (request, reply) => {
 			reply.removeHeader('X-Frame-Options');

 			reply.header('Cache-Control', 'public, max-age=3600');
-			return await reply.view('base-embed', {
+			return await HtmlTemplateService.replyHtml(reply, BaseEmbed({
 				title: this.meta.name ?? 'Misskey',
-				...await this.generateCommonPugData(this.meta),
-			});
+				...await this.htmlTemplateService.getCommonData(),
+			}));
 		});

 		fastify.get('/_info_card_', async (request, reply) => {
 			reply.removeHeader('X-Frame-Options');

-			return await reply.view('info-card', {
+			return await HtmlTemplateService.replyHtml(reply, InfoCardPage({
 				version: this.config.version,
-				host: this.config.host,
+				config: this.config,
 				meta: this.meta,
-				originalUsersCount: await this.usersRepository.countBy({ host: IsNull() }),
-				originalNotesCount: await this.notesRepository.countBy({ userHost: IsNull() }),
-			});
+			}));
 		});
 		//#endregion

 		fastify.get('/bios', async (request, reply) => {
-			return await reply.view('bios', {
+			return await HtmlTemplateService.replyHtml(reply, BiosPage({
 				version: this.config.version,
-			});
+			}));
 		});

 		fastify.get('/cli', async (request, reply) => {
-			return await reply.view('cli', {
+			return await HtmlTemplateService.replyHtml(reply, CliPage({
 				version: this.config.version,
-			});
+			}));
 		});

 		const override = (source: string, target: string, depth = 0) =>
@@ -917,7 +874,7 @@ export class ClientServerService {
 				reply.header('Clear-Site-Data', '"*"');
 			}
 			reply.header('Set-Cookie', 'http-flush-failed=1; Path=/flush; Max-Age=60');
-			return await reply.view('flush');
+			return await HtmlTemplateService.replyHtml(reply, FlushPage());
 		});

 		// streamingに非WebSocketリクエストが来た場合にbase htmlをキャシュ付きで返すと、Proxy等でそのパスがキャッシュされておかしくなる
@@ -943,10 +900,10 @@ export class ClientServerService {
 			});
 			reply.code(500);
 			reply.header('Cache-Control', 'max-age=10, must-revalidate');
-			return await reply.view('error', {
+			return await HtmlTemplateService.replyHtml(reply, ErrorPage({
 				code: error.code,
 				id: errId,
-			});
+			}));
 		});

 		done();
--- a/packages/backend/src/server/web/HtmlTemplateService.ts
+++ b/packages/backend/src/server/web/HtmlTemplateService.ts
@@ -0,0 +1,105 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { dirname } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { promises as fsp } from 'node:fs';
+import { languages } from 'i18n';
+import { Injectable, Inject } from '@nestjs/common';
+import { DI } from '@/di-symbols.js';
+import { bindThis } from '@/decorators.js';
+import { htmlSafeJsonStringify } from '@/misc/json-stringify-html-safe.js';
+import { MetaEntityService } from '@/core/entities/MetaEntityService.js';
+import type { FastifyReply } from 'fastify';
+import type { Config } from '@/config.js';
+import type { MiMeta } from '@/models/Meta.js';
+import type { CommonData } from './views/_.js';
+
+const _filename = fileURLToPath(import.meta.url);
+const _dirname = dirname(_filename);
+
+const frontendVitePublic = `${_dirname}/../../../../frontend/public/`;
+const frontendEmbedVitePublic = `${_dirname}/../../../../frontend-embed/public/`;
+
+@Injectable()
+export class HtmlTemplateService {
+	private frontendBootloadersFetched = false;
+	public frontendBootloaderJs: string | null = null;
+	public frontendBootloaderCss: string | null = null;
+	public frontendEmbedBootloaderJs: string | null = null;
+	public frontendEmbedBootloaderCss: string | null = null;
+
+	constructor(
+		@Inject(DI.config)
+		private config: Config,
+
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
+		private metaEntityService: MetaEntityService,
+	) {
+	}
+
+	@bindThis
+	private async prepareFrontendBootloaders() {
+		if (this.frontendBootloadersFetched) return;
+		this.frontendBootloadersFetched = true;
+
+		const [bootJs, bootCss, embedBootJs, embedBootCss] = await Promise.all([
+			fsp.readFile(`${frontendVitePublic}loader/boot.js`, 'utf-8').catch(() => null),
+			fsp.readFile(`${frontendVitePublic}loader/style.css`, 'utf-8').catch(() => null),
+			fsp.readFile(`${frontendEmbedVitePublic}loader/boot.js`, 'utf-8').catch(() => null),
+			fsp.readFile(`${frontendEmbedVitePublic}loader/style.css`, 'utf-8').catch(() => null),
+		]);
+
+		if (bootJs != null) {
+			this.frontendBootloaderJs = bootJs;
+		}
+
+		if (bootCss != null) {
+			this.frontendBootloaderCss = bootCss;
+		}
+
+		if (embedBootJs != null) {
+			this.frontendEmbedBootloaderJs = embedBootJs;
+		}
+
+		if (embedBootCss != null) {
+			this.frontendEmbedBootloaderCss = embedBootCss;
+		}
+	}
+
+	@bindThis
+	public async getCommonData(): Promise<CommonData> {
+		await this.prepareFrontendBootloaders();
+
+		return {
+			version: this.config.version,
+			config: this.config,
+			langs: [...languages],
+			instanceName: this.meta.name ?? 'Misskey',
+			icon: this.meta.iconUrl,
+			appleTouchIcon: this.meta.app512IconUrl,
+			themeColor: this.meta.themeColor,
+			serverErrorImageUrl: this.meta.serverErrorImageUrl ?? 'https://xn--931a.moe/assets/error.jpg',
+			infoImageUrl: this.meta.infoImageUrl ?? 'https://xn--931a.moe/assets/info.jpg',
+			notFoundImageUrl: this.meta.notFoundImageUrl ?? 'https://xn--931a.moe/assets/not-found.jpg',
+			instanceUrl: this.config.url,
+			metaJson: htmlSafeJsonStringify(await this.metaEntityService.packDetailed(this.meta)),
+			now: Date.now(),
+			federationEnabled: this.meta.federation !== 'none',
+			frontendBootloaderJs: this.frontendBootloaderJs,
+			frontendBootloaderCss: this.frontendBootloaderCss,
+			frontendEmbedBootloaderJs: this.frontendEmbedBootloaderJs,
+			frontendEmbedBootloaderCss: this.frontendEmbedBootloaderCss,
+		};
+	}
+
+	public static async replyHtml(reply: FastifyReply, html: string | Promise<string>) {
+		reply.header('Content-Type', 'text/html; charset=utf-8');
+		const _html = await html;
+		return reply.send(_html);
+	}
+}
--- a/packages/backend/src/server/web/bios.css
+++ b/packages/backend/src/server/web/bios.css
@@ -1,46 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- *
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-* {
-	font-family: Fira code, Fira Mono, Consolas, Menlo, Courier, monospace;
-}
-
-html {
-	background: #ffb4e1;
-}
-
-main {
-	background: #dedede;
-}
-main > .tabs {
-	padding: 16px;
-	border-bottom: solid 4px #c3c3c3;
-}
-
-#lsEditor > .adder {
-	margin: 16px;
-	padding: 16px;
-	border: solid 2px #c3c3c3;
-}
-#lsEditor > .adder > textarea {
-	display: block;
-	width: 100%;
-	min-height: 5em;
-	box-sizing: border-box;
-}
-#lsEditor > .record {
-	padding: 16px;
-	border-bottom: solid 1px #c3c3c3;
-}
-#lsEditor > .record > header {
-	font-weight: bold;
-}
-#lsEditor > .record > textarea {
-	display: block;
-	width: 100%;
-	min-height: 5em;
-	box-sizing: border-box;
-}
--- a/packages/backend/src/server/web/bios.js
+++ b/packages/backend/src/server/web/bios.js
@@ -1,92 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-'use strict';
-
-window.onload = async () => {
-	const account = JSON.parse(localStorage.getItem('account'));
-	const i = account.token;
-
-	const api = (endpoint, data = {}) => {
-		const promise = new Promise((resolve, reject) => {
-			// Append a credential
-			if (i) data.i = i;
-
-			// Send request
-			window.fetch(endpoint.indexOf('://') > -1 ? endpoint : `/api/${endpoint}`, {
-				method: 'POST',
-				body: JSON.stringify(data),
-				credentials: 'omit',
-				cache: 'no-cache'
-			}).then(async (res) => {
-				const body = res.status === 204 ? null : await res.json();
-
-				if (res.status === 200) {
-					resolve(body);
-				} else if (res.status === 204) {
-					resolve();
-				} else {
-					reject(body.error);
-				}
-			}).catch(reject);
-		});
-
-		return promise;
-	};
-
-	const content = document.getElementById('content');
-
-	document.getElementById('ls').addEventListener('click', () => {
-		content.innerHTML = '';
-
-		const lsEditor = document.createElement('div');
-		lsEditor.id = 'lsEditor';
-
-		const adder = document.createElement('div');
-		adder.classList.add('adder');
-		const addKeyInput = document.createElement('input');
-		const addValueTextarea = document.createElement('textarea');
-		const addButton = document.createElement('button');
-		addButton.textContent = 'add';
-		addButton.addEventListener('click', () => {
-			localStorage.setItem(addKeyInput.value, addValueTextarea.value);
-			location.reload();
-		});
-
-		adder.appendChild(addKeyInput);
-		adder.appendChild(addValueTextarea);
-		adder.appendChild(addButton);
-		lsEditor.appendChild(adder);
-
-		for (let i = 0; i < localStorage.length; i++) {
-			const k = localStorage.key(i);
-			const record = document.createElement('div');
-			record.classList.add('record');
-			const header = document.createElement('header');
-			header.textContent = k;
-			const textarea = document.createElement('textarea');
-			textarea.textContent = localStorage.getItem(k);
-			const saveButton = document.createElement('button');
-			saveButton.textContent = 'save';
-			saveButton.addEventListener('click', () => {
-				localStorage.setItem(k, textarea.value);
-				location.reload();
-			});
-			const removeButton = document.createElement('button');
-			removeButton.textContent = 'remove';
-			removeButton.addEventListener('click', () => {
-				localStorage.removeItem(k);
-				location.reload();
-			});
-			record.appendChild(header);
-			record.appendChild(textarea);
-			record.appendChild(saveButton);
-			record.appendChild(removeButton);
-			lsEditor.appendChild(record);
-		}
-
-		content.appendChild(lsEditor);
-	});
-};
--- a/packages/backend/src/server/web/boot.embed.js
+++ b/packages/backend/src/server/web/boot.embed.js
@@ -1,208 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-'use strict';
-
-// ブロックの中に入れないと、定義した変数がブラウザのグローバルスコープに登録されてしまい邪魔なので
-(async () => {
-	window.onerror = (e) => {
-		console.error(e);
-		renderError('SOMETHING_HAPPENED');
-	};
-	window.onunhandledrejection = (e) => {
-		console.error(e);
-		renderError('SOMETHING_HAPPENED_IN_PROMISE');
-	};
-
-	let forceError = localStorage.getItem('forceError');
-	if (forceError != null) {
-		renderError('FORCED_ERROR', 'This error is forced by having forceError in local storage.');
-		return;
-	}
-
-	// パラメータに応じてsplashのスタイルを変更
-	const params = new URLSearchParams(location.search);
-	if (params.has('rounded') && params.get('rounded') === 'false') {
-		document.documentElement.classList.add('norounded');
-	}
-	if (params.has('border') && params.get('border') === 'false') {
-		document.documentElement.classList.add('noborder');
-	}
-
-	//#region Detect language & fetch translations
-	const supportedLangs = LANGS;
-	/** @type { string } */
-	let lang = localStorage.getItem('lang');
-	if (lang == null || !supportedLangs.includes(lang)) {
-		if (supportedLangs.includes(navigator.language)) {
-			lang = navigator.language;
-		} else {
-			lang = supportedLangs.find(x => x.split('-')[0] === navigator.language);
-
-			// Fallback
-			if (lang == null) lang = 'en-US';
-		}
-	}
-
-	// for https://github.com/misskey-dev/misskey/issues/10202
-	if (lang == null || lang.toString == null || lang.toString() === 'null') {
-		console.error('invalid lang value detected!!!', typeof lang, lang);
-		lang = 'en-US';
-	}
-	//#endregion
-
-	//#region Script
-	async function importAppScript() {
-		await import(CLIENT_ENTRY ? `/embed_vite/${CLIENT_ENTRY.replace('scripts', lang)}` : '/embed_vite/src/boot.ts')
-			.catch(async e => {
-				console.error(e);
-				renderError('APP_IMPORT');
-			});
-	}
-
-	// タイミングによっては、この時点でDOMの構築が済んでいる場合とそうでない場合とがある
-	if (document.readyState !== 'loading') {
-		importAppScript();
-	} else {
-		window.addEventListener('DOMContentLoaded', () => {
-			importAppScript();
-		});
-	}
-	//#endregion
-
-	async function addStyle(styleText) {
-		let css = document.createElement('style');
-		css.appendChild(document.createTextNode(styleText));
-		document.head.appendChild(css);
-	}
-
-	async function renderError(code) {
-		// Cannot set property 'innerHTML' of null を回避
-		if (document.readyState === 'loading') {
-			await new Promise(resolve => window.addEventListener('DOMContentLoaded', resolve));
-		}
-
-		let messages = null;
-		const bootloaderLocales = localStorage.getItem('bootloaderLocales');
-		if (bootloaderLocales) {
-			messages = JSON.parse(bootloaderLocales);
-		}
-		if (!messages) {
-			// older version of misskey does not store bootloaderLocales, stores locale as a whole
-			const legacyLocale = localStorage.getItem('locale');
-			if (legacyLocale) {
-				const parsed = JSON.parse(legacyLocale);
-				messages = {
-					...(parsed._bootErrors ?? {}),
-					reload: parsed.reload,
-				};
-			}
-		}
-		if (!messages) messages = {};
-
-		const title = messages?.title || 'Failed to initialize Misskey';
-		const reload = messages?.reload || 'Reload';
-
-		document.body.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="icon"><path stroke="none" d="M0 0h24v24H0z" fill="none"/><path d="M12 12m-9 0a9 9 0 1 0 18 0a9 9 0 1 0 -18 0" /><path d="M12 9v4" /><path d="M12 16v.01" /></svg>
-		<div class="message">${title}</div>
-		<div class="submessage">Error Code: ${code}</div>
-		<button onclick="location.reload(!0)">
-			<div>${reload}</div>
-		</button>`;
-		addStyle(`
-		#misskey_app,
-		#splash {
-			display: none !important;
-		}
-
-		html,
-		body {
-			margin: 0;
-		}
-
-		body {
-			position: relative;
-			color: #dee7e4;
-			font-family: Hiragino Maru Gothic Pro, BIZ UDGothic, Roboto, HelveticaNeue, Arial, sans-serif;
-			line-height: 1.35;
-			display: flex;
-			flex-direction: column;
-			align-items: center;
-			justify-content: center;
-			min-height: 100vh;
-			margin: 0;
-			padding: 24px;
-			box-sizing: border-box;
-			overflow: hidden;
-
-			border-radius: var(--radius, 12px);
-			border: 1px solid rgba(231, 255, 251, 0.14);
-		}
-
-		body::before {
-			content: '';
-			position: fixed;
-			top: 0;
-			left: 0;
-			width: 100%;
-			height: 100%;
-			background: #192320;
-			border-radius: var(--radius, 12px);
-			z-index: -1;
-		}
-
-		html.embed.norounded body,
-		html.embed.norounded body::before {
-			border-radius: 0;
-		}
-
-		html.embed.noborder body {
-			border: none;
-		}
-
-		.icon {
-			max-width: 60px;
-			width: 100%;
-			height: auto;
-			margin-bottom: 20px;
-			color: #dec340;
-		}
-
-		.message {
-			text-align: center;
-			font-size: 20px;
-			font-weight: 700;
-			margin-bottom: 20px;
-		}
-
-		.submessage {
-			text-align: center;
-			font-size: 90%;
-			margin-bottom: 7.5px;
-		}
-
-		.submessage:last-of-type {
-			margin-bottom: 20px;
-		}
-
-		button {
-			padding: 7px 14px;
-			min-width: 100px;
-			font-weight: 700;
-			font-family: Hiragino Maru Gothic Pro, BIZ UDGothic, Roboto, HelveticaNeue, Arial, sans-serif;
-			line-height: 1.35;
-			border-radius: 99rem;
-			background-color: #b4e900;
-			color: #192320;
-			border: none;
-			cursor: pointer;
-			-webkit-tap-highlight-color: transparent;
-		}
-
-		button:hover {
-			background-color: #c6ff03;
-		}`);
-	}
-})();
--- a/packages/backend/src/server/web/boot.js
+++ b/packages/backend/src/server/web/boot.js
@@ -1,336 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-'use strict';
-
-// ブロックの中に入れないと、定義した変数がブラウザのグローバルスコープに登録されてしまい邪魔なので
-(async () => {
-	window.onerror = (e) => {
-		console.error(e);
-		renderError('SOMETHING_HAPPENED', e);
-	};
-	window.onunhandledrejection = (e) => {
-		console.error(e);
-		renderError('SOMETHING_HAPPENED_IN_PROMISE', e.reason || e);
-	};
-
-	let forceError = localStorage.getItem('forceError');
-	if (forceError != null) {
-		renderError('FORCED_ERROR', 'This error is forced by having forceError in local storage.');
-		return;
-	}
-
-	//#region Detect language
-	const supportedLangs = LANGS;
-	/** @type { string } */
-	let lang = localStorage.getItem('lang');
-	if (lang == null || !supportedLangs.includes(lang)) {
-		if (supportedLangs.includes(navigator.language)) {
-			lang = navigator.language;
-		} else {
-			lang = supportedLangs.find(x => x.split('-')[0] === navigator.language);
-
-			// Fallback
-			if (lang == null) lang = 'en-US';
-		}
-	}
-
-	// for https://github.com/misskey-dev/misskey/issues/10202
-	if (lang == null || lang.toString == null || lang.toString() === 'null') {
-		console.error('invalid lang value detected!!!', typeof lang, lang);
-		lang = 'en-US';
-	}
-	//#endregion
-
-	//#region Script
-	async function importAppScript() {
-		await import(CLIENT_ENTRY ? `/vite/${CLIENT_ENTRY.replace('scripts', lang)}` : '/vite/src/_boot_.ts')
-			.catch(async e => {
-				console.error(e);
-				renderError('APP_IMPORT', e);
-			});
-	}
-
-	// タイミングによっては、この時点でDOMの構築が済んでいる場合とそうでない場合とがある
-	if (document.readyState !== 'loading') {
-		importAppScript();
-	} else {
-		window.addEventListener('DOMContentLoaded', () => {
-			importAppScript();
-		});
-	}
-	//#endregion
-
-	let isSafeMode = (localStorage.getItem('isSafeMode') === 'true');
-
-	if (!isSafeMode) {
-		const urlParams = new URLSearchParams(window.location.search);
-
-		if (urlParams.has('safemode') && urlParams.get('safemode') === 'true') {
-			localStorage.setItem('isSafeMode', 'true');
-			isSafeMode = true;
-		}
-	}
-
-	//#region Theme
-	if (!isSafeMode) {
-		const theme = localStorage.getItem('theme');
-		if (theme) {
-			for (const [k, v] of Object.entries(JSON.parse(theme))) {
-				document.documentElement.style.setProperty(`--MI_THEME-${k}`, v.toString());
-
-				// HTMLの theme-color 適用
-				if (k === 'htmlThemeColor') {
-					for (const tag of document.head.children) {
-						if (tag.tagName === 'META' && tag.getAttribute('name') === 'theme-color') {
-							tag.setAttribute('content', v);
-							break;
-						}
-					}
-				}
-			}
-		}
-	}
-
-	const colorScheme = localStorage.getItem('colorScheme');
-	if (colorScheme) {
-		document.documentElement.style.setProperty('color-scheme', colorScheme);
-	}
-	//#endregion
-
-	const fontSize = localStorage.getItem('fontSize');
-	if (fontSize) {
-		document.documentElement.classList.add('f-' + fontSize);
-	}
-
-	const useSystemFont = localStorage.getItem('useSystemFont');
-	if (useSystemFont) {
-		document.documentElement.classList.add('useSystemFont');
-	}
-
-	if (!isSafeMode) {
-		const customCss = localStorage.getItem('customCss');
-		if (customCss && customCss.length > 0) {
-			const style = document.createElement('style');
-			style.innerHTML = customCss;
-			document.head.appendChild(style);
-		}
-	}
-
-	async function addStyle(styleText) {
-		let css = document.createElement('style');
-		css.appendChild(document.createTextNode(styleText));
-		document.head.appendChild(css);
-	}
-
-	async function renderError(code, details) {
-		// Cannot set property 'innerHTML' of null を回避
-		if (document.readyState === 'loading') {
-			await new Promise(resolve => window.addEventListener('DOMContentLoaded', resolve));
-		}
-
-		let messages = null;
-		const bootloaderLocales = localStorage.getItem('bootloaderLocales');
-		if (bootloaderLocales) {
-			messages = JSON.parse(bootloaderLocales);
-		}
-		if (!messages) {
-			// older version of misskey does not store bootloaderLocales, stores locale as a whole
-			const legacyLocale = localStorage.getItem('locale');
-			if (legacyLocale) {
-				const parsed = JSON.parse(legacyLocale);
-				messages = {
-					...(parsed._bootErrors ?? {}),
-					reload: parsed.reload,
-				};
-			}
-		}
-		if (!messages) messages = {};
-
-		messages = Object.assign({
-			title: 'Failed to initialize Misskey',
-			solution: 'The following actions may solve the problem.',
-			solution1: 'Update your os and browser',
-			solution2: 'Disable an adblocker',
-			solution3: 'Clear the browser cache',
-			solution4: '(Tor Browser) Set dom.webaudio.enabled to true',
-			otherOption: 'Other options',
-			otherOption1: 'Clear preferences and cache',
-			otherOption2: 'Start the simple client',
-			otherOption3: 'Start the repair tool',
-			otherOption4: 'Start Misskey in safe mode',
-			reload: 'Reload',
-		}, messages);
-
-		const safeModeUrl = new URL(window.location.href);
-		safeModeUrl.searchParams.set('safemode', 'true');
-
-		let errorsElement = document.getElementById('errors');
-
-		if (!errorsElement) {
-			document.body.innerHTML = `
-			<svg class="icon-warning" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round">
-				<path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
-				<path d="M12 9v2m0 4v.01"></path>
-				<path d="M5 19h14a2 2 0 0 0 1.84 -2.75l-7.1 -12.25a2 2 0 0 0 -3.5 0l-7.1 12.25a2 2 0 0 0 1.75 2.75"></path>
-			</svg>
-			<h1>${messages.title}</h1>
-			<button class="button-big" onclick="location.reload(true);">
-				<span class="button-label-big">${messages?.reload}</span>
-			</button>
-			<p><b>${messages.solution}</b></p>
-			<p>${messages.solution1}</p>
-			<p>${messages.solution2}</p>
-			<p>${messages.solution3}</p>
-			<p>${messages.solution4}</p>
-			<details style="color: #86b300;">
-				<summary>${messages.otherOption}</summary>
-				<a href="${safeModeUrl}">
-					<button class="button-small">
-						<span class="button-label-small">${messages.otherOption4}</span>
-					</button>
-				</a>
-				<br>
-				<a href="/flush">
-					<button class="button-small">
-						<span class="button-label-small">${messages.otherOption1}</span>
-					</button>
-				</a>
-				<br>
-				<a href="/cli">
-					<button class="button-small">
-						<span class="button-label-small">${messages.otherOption2}</span>
-					</button>
-				</a>
-				<br>
-				<a href="/bios">
-					<button class="button-small">
-						<span class="button-label-small">${messages.otherOption3}</span>
-					</button>
-				</a>
-			</details>
-			<br>
-			<div id="errors"></div>
-			`;
-			errorsElement = document.getElementById('errors');
-		}
-		const detailsElement = document.createElement('details');
-		detailsElement.id = 'errorInfo';
-		detailsElement.innerHTML = `
-		<br>
-		<summary>
-			<code>ERROR CODE: ${code}</code>
-		</summary>
-		<code>${details.toString()} ${JSON.stringify(details)}</code>`;
-		errorsElement.appendChild(detailsElement);
-		addStyle(`
-		* {
-			font-family: BIZ UDGothic, Roboto, HelveticaNeue, Arial, sans-serif;
-		}
-
-		#misskey_app,
-		#splash {
-			display: none !important;
-		}
-
-		body,
-		html {
-			background-color: #222;
-			color: #dfddcc;
-			justify-content: center;
-			margin: auto;
-			padding: 10px;
-			text-align: center;
-		}
-
-		button {
-			border-radius: 999px;
-			padding: 0px 12px 0px 12px;
-			border: none;
-			cursor: pointer;
-			margin-bottom: 12px;
-		}
-
-		.button-big {
-			background: linear-gradient(90deg, rgb(134, 179, 0), rgb(74, 179, 0));
-			line-height: 50px;
-		}
-
-		.button-big:hover {
-			background: rgb(153, 204, 0);
-		}
-
-		.button-small {
-			background: #444;
-			line-height: 40px;
-		}
-
-		.button-small:hover {
-			background: #555;
-		}
-
-		.button-label-big {
-			color: #222;
-			font-weight: bold;
-			font-size: 1.2em;
-			padding: 12px;
-		}
-
-		.button-label-small {
-			color: rgb(153, 204, 0);
-			font-size: 16px;
-			padding: 12px;
-		}
-
-		a {
-			color: rgb(134, 179, 0);
-			text-decoration: none;
-		}
-
-		p,
-		li {
-			font-size: 16px;
-		}
-
-		.icon-warning {
-			color: #dec340;
-			height: 4rem;
-			padding-top: 2rem;
-		}
-
-		h1 {
-			font-size: 1.5em;
-			margin: 1em;
-		}
-
-		code {
-			font-family: Fira, FiraCode, monospace;
-		}
-
-		#errorInfo {
-			background: #333;
-			margin-bottom: 2rem;
-			padding: 0.5rem 1rem;
-			width: 40rem;
-			border-radius: 10px;
-			justify-content: center;
-			margin: auto;
-		}
-
-		#errorInfo summary {
-			cursor: pointer;
-		}
-
-		#errorInfo summary > * {
-			display: inline;
-		}
-
-		@media screen and (max-width: 500px) {
-			#errorInfo {
-				width: 50%;
-			}
-		}`);
-	}
-})();
--- a/packages/backend/src/server/web/cli.css
+++ b/packages/backend/src/server/web/cli.css
@@ -1,25 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- *
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-* {
-	font-family: Fira code, Fira Mono, Consolas, Menlo, Courier, monospace;
-}
-
-html {
-	background: #ffb4e1;
-}
-
-main {
-	background: #dedede;
-}
-
-#tl > div {
-	padding: 16px;
-	border-bottom: solid 1px #c3c3c3;
-}
-#tl > div > header {
-	font-weight: bold;
-}
--- a/packages/backend/src/server/web/cli.js
+++ b/packages/backend/src/server/web/cli.js
@@ -1,63 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-'use strict';
-
-window.onload = async () => {
-	const account = JSON.parse(localStorage.getItem('account'));
-	const i = account.token;
-
-	const api = (endpoint, data = {}) => {
-		const promise = new Promise((resolve, reject) => {
-			// Append a credential
-			if (i) data.i = i;
-
-			// Send request
-			fetch(endpoint.indexOf('://') > -1 ? endpoint : `/api/${endpoint}`, {
-				headers: {
-					'Content-Type': 'application/json'
-				},
-				method: 'POST',
-				body: JSON.stringify(data),
-				credentials: 'omit',
-				cache: 'no-cache'
-			}).then(async (res) => {
-				const body = res.status === 204 ? null : await res.json();
-
-				if (res.status === 200) {
-					resolve(body);
-				} else if (res.status === 204) {
-					resolve();
-				} else {
-					reject(body.error);
-				}
-			}).catch(reject);
-		});
-
-		return promise;
-	};
-
-	document.getElementById('submit').addEventListener('click', () => {
-		api('notes/create', {
-			text: document.getElementById('text').value
-		}).then(() => {
-			location.reload();
-		});
-	});
-
-	api('notes/timeline').then(notes => {
-		const tl = document.getElementById('tl');
-		for (const note of notes) {
-			const el = document.createElement('div');
-			const name = document.createElement('header');
-			name.textContent = `${note.user.name} @${note.user.username}`;
-			const text = document.createElement('div');
-			text.textContent = `${note.text}`;
-			el.appendChild(name);
-			el.appendChild(text);
-			tl.appendChild(el);
-		}
-	});
-};
--- a/packages/backend/src/server/web/error.css
+++ b/packages/backend/src/server/web/error.css
@@ -1,111 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- *
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-* {
-	font-family: BIZ UDGothic, Roboto, HelveticaNeue, Arial, sans-serif;
-}
-
-#misskey_app,
-#splash {
-	display: none !important;
-}
-
-body,
-html {
-	background-color: #222;
-	color: #dfddcc;
-	justify-content: center;
-	margin: auto;
-	padding: 10px;
-	text-align: center;
-}
-
-button {
-	border-radius: 999px;
-	padding: 0px 12px 0px 12px;
-	border: none;
-	cursor: pointer;
-	margin-bottom: 12px;
-}
-
-.button-big {
-	background: linear-gradient(90deg, rgb(134, 179, 0), rgb(74, 179, 0));
-	line-height: 50px;
-}
-
-.button-big:hover {
-	background: rgb(153, 204, 0);
-}
-
-.button-small {
-	background: #444;
-	line-height: 40px;
-}
-
-.button-small:hover {
-	background: #555;
-}
-
-.button-label-big {
-	color: #222;
-	font-weight: bold;
-	font-size: 1.2em;
-	padding: 12px;
-}
-
-.button-label-small {
-	color: rgb(153, 204, 0);
-	font-size: 16px;
-	padding: 12px;
-}
-
-a {
-	color: rgb(134, 179, 0);
-	text-decoration: none;
-}
-
-p,
-li {
-	font-size: 16px;
-}
-
-.icon-warning {
-	color: #dec340;
-	height: 4rem;
-	padding-top: 2rem;
-}
-
-h1 {
-	font-size: 1.5em;
-	margin: 1em;
-}
-
-code {
-	display: block;
-	font-family: Fira, FiraCode, monospace;
-	background: #333;
-	padding: 0.5rem 1rem;
-	max-width: 40rem;
-	border-radius: 10px;
-	justify-content: center;
-	margin: auto;
-	white-space: pre-wrap;
-	word-break: break-word;
-}
-
-#errorInfo summary {
-	cursor: pointer;
-}
-
-#errorInfo summary>* {
-	display: inline;
-}
-
-@media screen and (max-width: 500px) {
-	#errorInfo {
-		width: 50%;
-	}
-}
--- a/packages/backend/src/server/web/error.js
+++ b/packages/backend/src/server/web/error.js
@@ -1,40 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-'use strict';
-
-(() => {
-	document.addEventListener('DOMContentLoaded', () => {
-		const locale = JSON.parse(localStorage.getItem('locale') || '{}');
-
-		const messages = Object.assign({
-			title: 'Failed to initialize Misskey',
-			serverError: 'If reloading after a period of time does not resolve the problem, contact the server administrator with the following ERROR ID.',
-			solution: 'The following actions may solve the problem.',
-			solution1: 'Update your os and browser',
-			solution2: 'Disable an adblocker',
-			solution3: 'Clear the browser cache',
-			solution4: '(Tor Browser) Set dom.webaudio.enabled to true',
-			otherOption: 'Other options',
-			otherOption1: 'Clear preferences and cache',
-			otherOption2: 'Start the simple client',
-			otherOption3: 'Start the repair tool',
-		}, locale?._bootErrors || {});
-		const reload = locale?.reload || 'Reload';
-
-		const reloadEls = document.querySelectorAll('[data-i18n-reload]');
-		for (const el of reloadEls) {
-			el.textContent = reload;
-		}
-
-		const i18nEls = document.querySelectorAll('[data-i18n]');
-		for (const el of i18nEls) {
-			const key = el.dataset.i18n;
-			if (key && messages[key]) {
-				el.textContent = messages[key];
-			}
-		}
-	});
-})();
--- a/packages/backend/src/server/web/style.css
+++ b/packages/backend/src/server/web/style.css
@@ -1,78 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- *
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-html {
-	background-color: var(--MI_THEME-bg);
-	color: var(--MI_THEME-fg);
-}
-
-#splash {
-	position: fixed;
-	z-index: 10000;
-	top: 0;
-	left: 0;
-	width: 100vw;
-	height: 100vh;
-	cursor: wait;
-	background-color: var(--MI_THEME-bg);
-	opacity: 1;
-	transition: opacity 0.5s ease;
-}
-
-#splashIcon {
-	position: absolute;
-	top: 0;
-	right: 0;
-	bottom: 0;
-	left: 0;
-	margin: auto;
-	width: 64px;
-	height: 64px;
-	border-radius: 10px;
-	pointer-events: none;
-}
-
-#splashSpinner {
-	position: absolute;
-	top: 0;
-	right: 0;
-	bottom: 0;
-	left: 0;
-	margin: auto;
-	display: inline-block;
-	width: 28px;
-	height: 28px;
-	transform: translateY(70px);
-	color: var(--MI_THEME-accent);
-}
-
-#splashSpinner > .spinner {
-	position: absolute;
-	top: 0;
-	left: 0;
-	width: 28px;
-	height: 28px;
-	fill-rule: evenodd;
-	clip-rule: evenodd;
-	stroke-linecap: round;
-	stroke-linejoin: round;
-	stroke-miterlimit: 1.5;
-}
-#splashSpinner > .spinner.bg {
-	opacity: 0.275;
-}
-#splashSpinner > .spinner.fg {
-	animation: splashSpinner 0.5s linear infinite;
-}
-
-@keyframes splashSpinner {
-	0% {
-		transform: rotate(0deg);
-	}
-	100% {
-		transform: rotate(360deg);
-	}
-}
--- a/packages/backend/src/server/web/style.embed.css
+++ b/packages/backend/src/server/web/style.embed.css
@@ -1,100 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and misskey-project
- *
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-html {
-	background-color: var(--MI_THEME-bg);
-	color: var(--MI_THEME-fg);
-}
-
-html.embed {
-	box-sizing: border-box;
-	background-color: transparent;
-	color-scheme: light dark;
-	max-width: 500px;
-}
-
-#splash {
-	position: fixed;
-	z-index: 10000;
-	top: 0;
-	left: 0;
-	width: 100vw;
-	height: 100vh;
-	cursor: wait;
-	background-color: var(--MI_THEME-bg);
-	opacity: 1;
-	transition: opacity 0.5s ease;
-}
-
-html.embed #splash {
-	box-sizing: border-box;
-	min-height: 300px;
-	border-radius: var(--radius, 12px);
-	border: 1px solid var(--MI_THEME-divider, #e8e8e8);
-}
-
-html.embed.norounded #splash {
-	border-radius: 0;
-}
-
-html.embed.noborder #splash {
-	border: none;
-}
-
-#splashIcon {
-	position: absolute;
-	top: 0;
-	right: 0;
-	bottom: 0;
-	left: 0;
-	margin: auto;
-	width: 64px;
-	height: 64px;
-	border-radius: 10px;
-	pointer-events: none;
-}
-
-#splashSpinner {
-	position: absolute;
-	top: 0;
-	right: 0;
-	bottom: 0;
-	left: 0;
-	margin: auto;
-	display: inline-block;
-	width: 28px;
-	height: 28px;
-	transform: translateY(70px);
-	color: var(--MI_THEME-accent);
-}
-
-#splashSpinner > .spinner {
-	position: absolute;
-	top: 0;
-	left: 0;
-	width: 28px;
-	height: 28px;
-	fill-rule: evenodd;
-	clip-rule: evenodd;
-	stroke-linecap: round;
-	stroke-linejoin: round;
-	stroke-miterlimit: 1.5;
-}
-#splashSpinner > .spinner.bg {
-	opacity: 0.275;
-}
-#splashSpinner > .spinner.fg {
-	animation: splashSpinner 0.5s linear infinite;
-}
-
-@keyframes splashSpinner {
-	0% {
-		transform: rotate(0deg);
-	}
-	100% {
-		transform: rotate(360deg);
-	}
-}
--- a/packages/backend/src/server/web/views/_.ts
+++ b/packages/backend/src/server/web/views/_.ts
@@ -0,0 +1,49 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Config } from '@/config.js';
+
+export const comment = `<!--
+  _____ _         _
+ |     |_|___ ___| |_ ___ _ _
+ | | | | |_ -|_ -| '_| -_| | |
+ |_|_|_|_|___|___|_,_|___|_  |
+                         |___|
+ Thank you for using Misskey!
+ If you are reading this message... how about joining the development?
+ https://github.com/misskey-dev/misskey
+
+-->`;
+
+export const defaultDescription = '✨🌎✨ A interplanetary communication platform ✨🚀✨';
+
+export type MinimumCommonData = {
+	version: string;
+	config: Config;
+};
+
+export type CommonData = MinimumCommonData & {
+	langs: string[];
+	instanceName: string;
+	icon: string | null;
+	appleTouchIcon: string | null;
+	themeColor: string | null;
+	serverErrorImageUrl: string;
+	infoImageUrl: string;
+	notFoundImageUrl: string;
+	instanceUrl: string;
+	now: number;
+	federationEnabled: boolean;
+	frontendBootloaderJs: string | null;
+	frontendBootloaderCss: string | null;
+	frontendEmbedBootloaderJs: string | null;
+	frontendEmbedBootloaderCss: string | null;
+	metaJson?: string;
+	clientCtxJson?: string;
+};
+
+export type CommonPropsMinimum<T = Record<string, any>> = MinimumCommonData & T;
+
+export type CommonProps<T = Record<string, any>> = CommonData & T;
--- a/packages/backend/src/server/web/views/_splash.tsx
+++ b/packages/backend/src/server/web/views/_splash.tsx
@@ -0,0 +1,26 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export function Splash(props: {
+	icon?: string | null;
+}) {
+	return (
+		<div id="splash">
+			<img id="splashIcon" src={props.icon || '/static-assets/splash.png'} />
+			<div id="splashSpinner">
+				<svg class="spinner bg" viewBox="0 0 152 152" xmlns="http://www.w3.org/2000/svg">
+					<g transform="matrix(1,0,0,1,12,12)">
+						<circle cx="64" cy="64" r="64" style="fill:none;stroke:currentColor;stroke-width:24px;"/>
+					</g>
+				</svg>
+				<svg class="spinner fg" viewBox="0 0 152 152" xmlns="http://www.w3.org/2000/svg">
+					<g transform="matrix(1,0,0,1,12,12)">
+						<path d="M128,64C128,28.654 99.346,0 64,0C99.346,0 128,28.654 128,64Z" style="fill:none;stroke:currentColor;stroke-width:24px;"/>
+					</g>
+				</svg>
+			</div>
+		</div>
+	);
+}
--- a/packages/backend/src/server/web/views/announcement.pug
+++ b/packages/backend/src/server/web/views/announcement.pug
@@ -1,21 +0,0 @@
-extends ./base
-
-block vars
-	- const title = announcement.title;
-	- const description = announcement.text.length > 100 ? announcement.text.slice(0, 100) + '…' : announcement.text;
-	- const url = `${config.url}/announcements/${announcement.id}`;
-
-block title
-	= `${title} | ${instanceName}`
-
-block desc
-	meta(name='description' content=description)
-
-block og
-	meta(property='og:type'        content='article')
-	meta(property='og:title'       content= title)
-	meta(property='og:description' content= description)
-	meta(property='og:url'         content= url)
-	if announcement.imageUrl
-		meta(property='og:image' content=announcement.imageUrl)
-		meta(property='twitter:card' content='summary_large_image')
--- a/packages/backend/src/server/web/views/announcement.tsx
+++ b/packages/backend/src/server/web/views/announcement.tsx
@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Packed } from '@/misc/json-schema.js';
+import type { CommonProps } from '@/server/web/views/_.js';
+import { Layout } from '@/server/web/views/base.js';
+
+export function AnnouncementPage(props: CommonProps<{
+	announcement: Packed<'Announcement'>;
+}>) {
+	const description = props.announcement.text.length > 100 ? props.announcement.text.slice(0, 100) + '…' : props.announcement.text;
+
+	function ogBlock() {
+		return (
+			<>
+				<meta property="og:type" content="article" />
+				<meta property="og:title" content={props.announcement.title} />
+				<meta property="og:description" content={description} />
+				<meta property="og:url" content={`${props.config.url}/announcements/${props.announcement.id}`} />
+				{props.announcement.imageUrl ? (
+					<>
+						<meta property="og:image" content={props.announcement.imageUrl} />
+						<meta property="twitter:card" content="summary_large_image" />
+					</>
+				) : null}
+			</>
+		);
+	}
+
+	return (
+		<Layout
+			{...props}
+			title={`${props.announcement.title} | ${props.instanceName}`}
+			desc={description}
+			ogSlot={ogBlock()}
+		>
+		</Layout>
+	);
+}
--- a/packages/backend/src/server/web/views/base-embed.pug
+++ b/packages/backend/src/server/web/views/base-embed.pug
@@ -1,71 +0,0 @@
-block vars
-
-block loadClientEntry
-	- const entry = config.frontendEmbedEntry;
-
-doctype html
-
-html(class='embed')
-
-	head
-		meta(charset='utf-8')
-		meta(name='application-name' content='Misskey')
-		meta(name='referrer' content='origin')
-		meta(name='theme-color' content= themeColor || '#86b300')
-		meta(name='theme-color-orig' content= themeColor || '#86b300')
-		meta(property='og:site_name' content= instanceName || 'Misskey')
-		meta(property='instance_url' content= instanceUrl)
-		meta(name='viewport' content='width=device-width, initial-scale=1')
-		meta(name='format-detection' content='telephone=no,date=no,address=no,email=no,url=no')
-		link(rel='icon' href= icon || '/favicon.ico')
-		link(rel='apple-touch-icon' href= appleTouchIcon || '/apple-touch-icon.png')
-
-		if !config.frontendEmbedManifestExists
-				script(type="module" src="/embed_vite/@vite/client")
-
-		if Array.isArray(entry.css)
-			each href in entry.css
-				link(rel='stylesheet' href=`/embed_vite/${href}`)
-
-		title
-			block title
-				= title || 'Misskey'
-
-		block meta
-			meta(name='robots' content='noindex')
-
-		style
-			include ../style.embed.css
-
-		script.
-			var VERSION = "#{version}";
-			var CLIENT_ENTRY = !{JSON.stringify(entry.file)};
-
-		script(type='application/json' id='misskey_meta' data-generated-at=now)
-			!= metaJson
-
-		script(type='application/json' id='misskey_embedCtx' data-generated-at=now)
-			!= embedCtx
-
-		script
-			include ../boot.embed.js
-
-	body
-		noscript: p
-			| JavaScriptを有効にしてください
-			br
-			| Please turn on your JavaScript
-		div#splash
-			img#splashIcon(src= icon || '/static-assets/splash.png')
-			div#splashSpinner
-				<svg class="spinner bg" viewBox="0 0 152 152" xmlns="http://www.w3.org/2000/svg">
-					<g transform="matrix(1,0,0,1,12,12)">
-						<circle cx="64" cy="64" r="64" style="fill:none;stroke:currentColor;stroke-width:24px;"/>
-					</g>
-				</svg>
-				<svg class="spinner fg" viewBox="0 0 152 152" xmlns="http://www.w3.org/2000/svg">
-					<g transform="matrix(1,0,0,1,12,12)">
-						<path d="M128,64C128,28.654 99.346,0 64,0C99.346,0 128,28.654 128,64Z" style="fill:none;stroke:currentColor;stroke-width:24px;"/>
-					</g>
-				</svg>
-		block content
--- a/packages/backend/src/server/web/views/base-embed.tsx
+++ b/packages/backend/src/server/web/views/base-embed.tsx
@@ -0,0 +1,88 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { comment } from '@/server/web/views/_.js';
+import type { CommonProps } from '@/server/web/views/_.js';
+import { Splash } from '@/server/web/views/_splash.js';
+import type { PropsWithChildren, Children } from '@kitajs/html';
+
+export function BaseEmbed(props: PropsWithChildren<CommonProps<{
+	title?: string;
+	noindex?: boolean;
+	desc?: string;
+	img?: string;
+	serverErrorImageUrl?: string;
+	infoImageUrl?: string;
+	notFoundImageUrl?: string;
+	metaJson?: string;
+	embedCtxJson?: string;
+
+	titleSlot?: Children;
+	metaSlot?: Children;
+}>>) {
+	const now = Date.now();
+
+	// 変数名をsafeで始めることでエラーをスキップ
+	const safeMetaJson = props.metaJson;
+	const safeEmbedCtxJson = props.embedCtxJson;
+
+	return (
+		<>
+			{'<!DOCTYPE html>'}
+			{comment}
+			<html>
+				<head>
+					<meta charset="UTF-8" />
+					<meta name="application-name" content="Misskey" />
+					<meta name="referer" content="origin" />
+					<meta name="theme-color" content={props.themeColor ?? '#86b300'} />
+					<meta name="theme-color-orig" content={props.themeColor ?? '#86b300'} />
+					<meta property="og:site_name" content={props.instanceName || 'Misskey'} />
+					<meta property="instance_url" content={props.instanceUrl} />
+					<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no, viewport-fit=cover" />
+					<meta name="format-detection" content="telephone=no,date=no,address=no,email=no,url=no" />
+					<link rel="icon" href={props.icon ?? '/favicon.ico'} />
+					<link rel="apple-touch-icon" href={props.appleTouchIcon ?? '/apple-touch-icon.png'} />
+
+					{!props.config.frontendEmbedManifestExists ? <script type="module" src="/embed_vite/@vite/client"></script> : null}
+
+					{props.config.frontendEmbedEntry.css != null ? props.config.frontendEmbedEntry.css.map((href) => (
+						<link rel="stylesheet" href={`/embed_vite/${href}`} />
+					)) : null}
+
+					{props.titleSlot ?? <title safe>{props.title || 'Misskey'}</title>}
+
+					{props.metaSlot}
+
+					<meta name="robots" content="noindex" />
+
+					{props.frontendEmbedBootloaderCss != null ? <style safe>{props.frontendEmbedBootloaderCss}</style> : <link rel="stylesheet" href="/embed_vite/loader/style.css" />}
+
+					<script>
+						const VERSION = '{props.version}';
+						const CLIENT_ENTRY = {JSON.stringify(props.config.frontendEmbedEntry.file)};
+						const LANGS = {JSON.stringify(props.langs)};
+					</script>
+
+					{safeMetaJson != null ? <script type="application/json" id="misskey_meta" data-generated-at={now}>{safeMetaJson}</script> : null}
+					{safeEmbedCtxJson != null ? <script type="application/json" id="misskey_embedCtx" data-generated-at={now}>{safeEmbedCtxJson}</script> : null}
+
+					{props.frontendEmbedBootloaderJs != null ? <script>{props.frontendEmbedBootloaderJs}</script> : <script src="/embed_vite/loader/boot.js"></script>}
+				</head>
+				<body>
+					<noscript>
+						<p>
+							JavaScriptを有効にしてください<br />
+							Please turn on your JavaScript
+						</p>
+					</noscript>
+					<Splash icon={props.icon} />
+					{props.children}
+				</body>
+			</html>
+		</>
+	);
+}
+
--- a/packages/backend/src/server/web/views/base.pug
+++ b/packages/backend/src/server/web/views/base.pug
@@ -1,100 +0,0 @@
-block vars
-
-block loadClientEntry
-	- const entry = config.frontendEntry;
-	- const baseUrl = config.url;
-
-doctype html
-
-//
-	-
-	  _____ _         _
-	 |     |_|___ ___| |_ ___ _ _
-	 | | | | |_ -|_ -| '_| -_| | |
-	 |_|_|_|_|___|___|_,_|___|_  |
-	                         |___|
-	 Thank you for using Misskey!
-	 If you are reading this message... how about joining the development?
-	 https://github.com/misskey-dev/misskey
-
-
-html
-
-	head
-		meta(charset='utf-8')
-		meta(name='application-name' content='Misskey')
-		meta(name='referrer' content='origin')
-		meta(name='theme-color' content= themeColor || '#86b300')
-		meta(name='theme-color-orig' content= themeColor || '#86b300')
-		meta(property='og:site_name' content= instanceName || 'Misskey')
-		meta(property='instance_url' content= instanceUrl)
-		meta(name='viewport' content='width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no, viewport-fit=cover')
-		meta(name='format-detection' content='telephone=no,date=no,address=no,email=no,url=no')
-		link(rel='icon' href= icon || '/favicon.ico')
-		link(rel='apple-touch-icon' href= appleTouchIcon || '/apple-touch-icon.png')
-		link(rel='manifest' href='/manifest.json')
-		link(rel='search' type='application/opensearchdescription+xml' title=(title || "Misskey") href=`${baseUrl}/opensearch.xml`)
-		link(rel='prefetch' href=serverErrorImageUrl)
-		link(rel='prefetch' href=infoImageUrl)
-		link(rel='prefetch' href=notFoundImageUrl)
-
-		if !config.frontendManifestExists
-				script(type="module" src="/vite/@vite/client")
-
-		if Array.isArray(entry.css)
-			each href in entry.css
-				link(rel='stylesheet' href=`/vite/${href}`)
-
-		title
-			block title
-				= title || 'Misskey'
-
-		if noindex
-			meta(name='robots' content='noindex')
-
-		block desc
-			meta(name='description' content= desc || '✨🌎✨ A interplanetary communication platform ✨🚀✨')
-
-		block meta
-
-		block og
-			meta(property='og:title'       content= title || 'Misskey')
-			meta(property='og:description' content= desc || '✨🌎✨ A interplanetary communication platform ✨🚀✨')
-			meta(property='og:image'       content= img)
-			meta(property='twitter:card'   content='summary')
-
-		style
-			include ../style.css
-
-		script.
-			var VERSION = "#{version}";
-			var CLIENT_ENTRY = !{JSON.stringify(entry.file)};
-
-		script(type='application/json' id='misskey_meta' data-generated-at=now)
-			!= metaJson
-
-		script(type='application/json' id='misskey_clientCtx' data-generated-at=now)
-			!= clientCtx
-
-		script
-			include ../boot.js
-
-	body
-		noscript: p
-			| JavaScriptを有効にしてください
-			br
-			| Please turn on your JavaScript
-		div#splash
-			img#splashIcon(src= icon || '/static-assets/splash.png')
-			div#splashSpinner
-				<svg class="spinner bg" viewBox="0 0 152 152" xmlns="http://www.w3.org/2000/svg">
-					<g transform="matrix(1,0,0,1,12,12)">
-						<circle cx="64" cy="64" r="64" style="fill:none;stroke:currentColor;stroke-width:24px;"/>
-					</g>
-				</svg>
-				<svg class="spinner fg" viewBox="0 0 152 152" xmlns="http://www.w3.org/2000/svg">
-					<g transform="matrix(1,0,0,1,12,12)">
-						<path d="M128,64C128,28.654 99.346,0 64,0C99.346,0 128,28.654 128,64Z" style="fill:none;stroke:currentColor;stroke-width:24px;"/>
-					</g>
-				</svg>
-		block content
--- a/packages/backend/src/server/web/views/base.tsx
+++ b/packages/backend/src/server/web/views/base.tsx
@@ -0,0 +1,108 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { comment, defaultDescription } from '@/server/web/views/_.js';
+import { Splash } from '@/server/web/views/_splash.js';
+import type { CommonProps } from '@/server/web/views/_.js';
+import type { PropsWithChildren, Children } from '@kitajs/html';
+
+export function Layout(props: PropsWithChildren<CommonProps<{
+	title?: string;
+	noindex?: boolean;
+	desc?: string;
+	img?: string;
+	serverErrorImageUrl?: string;
+	infoImageUrl?: string;
+	notFoundImageUrl?: string;
+	metaJson?: string;
+	clientCtxJson?: string;
+
+	titleSlot?: Children;
+	descSlot?: Children;
+	metaSlot?: Children;
+	ogSlot?: Children;
+}>>) {
+	const now = Date.now();
+
+	// 変数名をsafeで始めることでエラーをスキップ
+	const safeMetaJson = props.metaJson;
+	const safeClientCtxJson = props.clientCtxJson;
+
+	return (
+		<>
+			{'<!DOCTYPE html>'}
+			{comment}
+			<html>
+				<head>
+					<meta charset="UTF-8" />
+					<meta name="application-name" content="Misskey" />
+					<meta name="referer" content="origin" />
+					<meta name="theme-color" content={props.themeColor ?? '#86b300'} />
+					<meta name="theme-color-orig" content={props.themeColor ?? '#86b300'} />
+					<meta property="og:site_name" content={props.instanceName || 'Misskey'} />
+					<meta property="instance_url" content={props.instanceUrl} />
+					<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no, viewport-fit=cover" />
+					<meta name="format-detection" content="telephone=no,date=no,address=no,email=no,url=no" />
+					<link rel="icon" href={props.icon || '/favicon.ico'} />
+					<link rel="apple-touch-icon" href={props.appleTouchIcon || '/apple-touch-icon.png'} />
+					<link rel="manifest" href="/manifest.json" />
+					<link rel="search" type="application/opensearchdescription+xml" title={props.title || 'Misskey'} href={`${props.config.url}/opensearch.xml`} />
+					{props.serverErrorImageUrl != null ? <link rel="prefetch" as="image" href={props.serverErrorImageUrl} /> : null}
+					{props.infoImageUrl != null ? <link rel="prefetch" as="image" href={props.infoImageUrl} /> : null}
+					{props.notFoundImageUrl != null ? <link rel="prefetch" as="image" href={props.notFoundImageUrl} /> : null}
+
+					{!props.config.frontendManifestExists ? <script type="module" src="/vite/@vite/client"></script> : null}
+
+					{props.config.frontendEntry.css != null ? props.config.frontendEntry.css.map((href) => (
+						<link rel="stylesheet" href={`/vite/${href}`} />
+					)) : null}
+
+					{props.titleSlot ?? <title safe>{props.title || 'Misskey'}</title>}
+
+					{props.noindex ? <meta name="robots" content="noindex" /> : null}
+
+					{props.descSlot ?? (props.desc != null ? <meta name="description" content={props.desc || defaultDescription} /> : null)}
+
+					{props.metaSlot}
+
+					{props.ogSlot ?? (
+						<>
+							<meta property="og:title" content={props.title || 'Misskey'} />
+							<meta property="og:description" content={props.desc || defaultDescription} />
+							{props.img != null ? <meta property="og:image" content={props.img} /> : null}
+							<meta property="twitter:card" content="summary" />
+						</>
+					)}
+
+					{props.frontendBootloaderCss != null ? <style safe>{props.frontendBootloaderCss}</style> : <link rel="stylesheet" href="/vite/loader/style.css" />}
+
+					<script>
+						const VERSION = '{props.version}';
+						const CLIENT_ENTRY = {JSON.stringify(props.config.frontendEntry.file)};
+						const LANGS = {JSON.stringify(props.langs)};
+					</script>
+
+					{safeMetaJson != null ? <script type="application/json" id="misskey_meta" data-generated-at={now}>{safeMetaJson}</script> : null}
+					{safeClientCtxJson != null ? <script type="application/json" id="misskey_clientCtx" data-generated-at={now}>{safeClientCtxJson}</script> : null}
+
+					{props.frontendBootloaderJs != null ? <script>{props.frontendBootloaderJs}</script> : <script src="/vite/loader/boot.js"></script>}
+				</head>
+				<body>
+					<noscript>
+						<p>
+							JavaScriptを有効にしてください<br />
+							Please turn on your JavaScript
+						</p>
+					</noscript>
+					<Splash icon={props.icon} />
+					{props.children}
+				</body>
+			</html>
+		</>
+	);
+}
+
+export { Layout as BasePage };
+
--- a/packages/backend/src/server/web/views/bios.pug
+++ b/packages/backend/src/server/web/views/bios.pug
@@ -1,20 +0,0 @@
-doctype html
-
-html
-
-	head
-		meta(charset='utf-8')
-		meta(name='application-name' content='Misskey')
-		title Misskey Repair Tool
-		style
-			include ../bios.css
-		script
-			include ../bios.js
-
-	body
-		header
-			h1 Misskey Repair Tool #{version}
-		main
-			div.tabs
-				button#ls edit local storage
-			div#content
--- a/packages/backend/src/server/web/views/bios.tsx
+++ b/packages/backend/src/server/web/views/bios.tsx
@@ -0,0 +1,35 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export function BiosPage(props: {
+	version: string;
+}) {
+	return (
+		<>
+			{'<!DOCTYPE html>'}
+			<html>
+				<head>
+					<meta charset="UTF-8" />
+					<meta name="application-name" content="Misskey" />
+					<title>Misskey Repair Tool</title>
+					<link rel="stylesheet" href="/static-assets/misc/bios.css" />
+				</head>
+
+				<body>
+					<header>
+						<h1 safe>Misskey Repair Tool {props.version}</h1>
+					</header>
+					<main>
+						<div class="tabs">
+							<button id="ls">edit local storage</button>
+						</div>
+						<div id="content"></div>
+					</main>
+					<script src="/static-assets/misc/bios.js"></script>
+				</body>
+			</html>
+		</>
+	);
+}
--- a/packages/backend/src/server/web/views/channel.pug
+++ b/packages/backend/src/server/web/views/channel.pug
@@ -1,19 +0,0 @@
-extends ./base
-
-block vars
-	- const title = channel.name;
-	- const url = `${config.url}/channels/${channel.id}`;
-
-block title
-	= `${title} | ${instanceName}`
-
-block desc
-	meta(name='description' content= channel.description)
-
-block og
-	meta(property='og:type'        content='article')
-	meta(property='og:title'       content= title)
-	meta(property='og:description' content= channel.description)
-	meta(property='og:url'         content= url)
-	meta(property='og:image'       content= channel.bannerUrl)
-	meta(property='twitter:card'   content='summary')
--- a/packages/backend/src/server/web/views/channel.tsx
+++ b/packages/backend/src/server/web/views/channel.tsx
@@ -0,0 +1,40 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Packed } from '@/misc/json-schema.js';
+import type { CommonProps } from '@/server/web/views/_.js';
+import { Layout } from '@/server/web/views/base.js';
+
+export function ChannelPage(props: CommonProps<{
+	channel: Packed<'Channel'>;
+}>) {
+
+	function ogBlock() {
+		return (
+			<>
+				<meta property="og:type" content="website" />
+				<meta property="og:title" content={props.channel.name} />
+				{props.channel.description != null ? <meta property="og:description" content={props.channel.description} /> : null}
+				<meta property="og:url" content={`${props.config.url}/channels/${props.channel.id}`} />
+				{props.channel.bannerUrl ? (
+					<>
+						<meta property="og:image" content={props.channel.bannerUrl} />
+						<meta property="twitter:card" content="summary" />
+					</>
+				) : null}
+			</>
+		);
+	}
+
+	return (
+		<Layout
+			{...props}
+			title={`${props.channel.name} | ${props.instanceName}`}
+			desc={props.channel.description ?? undefined}
+			ogSlot={ogBlock()}
+		>
+		</Layout>
+	);
+}
--- a/packages/backend/src/server/web/views/cli.pug
+++ b/packages/backend/src/server/web/views/cli.pug
@@ -1,21 +0,0 @@
-doctype html
-
-html
-
-	head
-		meta(charset='utf-8')
-		meta(name='application-name' content='Misskey')
-		title Misskey Cli
-		style
-			include ../cli.css
-		script
-			include ../cli.js
-
-	body
-		header
-			h1 Misskey Cli #{version}
-		main
-			div#form
-				textarea#text
-				button#submit submit
-			div#tl
--- a/packages/backend/src/server/web/views/cli.tsx
+++ b/packages/backend/src/server/web/views/cli.tsx
@@ -0,0 +1,37 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export function CliPage(props: {
+	version: string;
+}) {
+	return (
+		<>
+			{'<!DOCTYPE html>'}
+			<html>
+				<head>
+					<meta charset="UTF-8" />
+					<meta name="application-name" content="Misskey" />
+					<title>Misskey CLI Tool</title>
+
+					<link rel="stylesheet" href="/static-assets/misc/cli.css" />
+				</head>
+
+				<body>
+					<header>
+						<h1 safe>Misskey CLI {props.version}</h1>
+					</header>
+					<main>
+						<div id="form">
+							<textarea id="text"></textarea>
+							<button id="submit">Submit</button>
+						</div>
+						<div id="tl"></div>
+					</main>
+					<script src="/static-assets/misc/cli.js"></script>
+				</body>
+			</html>
+		</>
+	);
+}
--- a/packages/backend/src/server/web/views/clip.pug
+++ b/packages/backend/src/server/web/views/clip.pug
@@ -1,35 +0,0 @@
-extends ./base
-
-block vars
-	- const user = clip.user;
-	- const title = clip.name;
-	- const url = `${config.url}/clips/${clip.id}`;
-
-block title
-	= `${title} | ${instanceName}`
-
-block desc
-	meta(name='description' content= clip.description)
-
-block og
-	meta(property='og:type'        content='article')
-	meta(property='og:title'       content= title)
-	meta(property='og:description' content= clip.description)
-	meta(property='og:url'         content= url)
-	meta(property='og:image'       content= avatarUrl)
-	meta(property='twitter:card'   content='summary')
-
-block meta
-	if profile.noCrawle
-		meta(name='robots' content='noindex')
-	if profile.preventAiLearning
-		meta(name='robots' content='noimageai')
-		meta(name='robots' content='noai')
-
-	meta(name='misskey:user-username' content=user.username)
-	meta(name='misskey:user-id' content=user.id)
-	meta(name='misskey:clip-id' content=clip.id)
-
-	// todo
-	if user.twitter
-		meta(name='twitter:creator' content=`@${user.twitter.screenName}`)
--- a/packages/backend/src/server/web/views/clip.tsx
+++ b/packages/backend/src/server/web/views/clip.tsx
@@ -0,0 +1,59 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Packed } from '@/misc/json-schema.js';
+import type { MiUserProfile } from '@/models/UserProfile.js';
+import type { CommonProps } from '@/server/web/views/_.js';
+import { Layout } from '@/server/web/views/base.js';
+
+export function ClipPage(props: CommonProps<{
+	clip: Packed<'Clip'>;
+	profile: MiUserProfile;
+}>) {
+	function ogBlock() {
+		return (
+			<>
+				<meta property="og:type" content="article" />
+				<meta property="og:title" content={props.clip.name} />
+				{props.clip.description != null ? <meta property="og:description" content={props.clip.description} /> : null}
+				<meta property="og:url" content={`${props.config.url}/clips/${props.clip.id}`} />
+				{props.clip.user.avatarUrl ? (
+					<>
+						<meta property="og:image" content={props.clip.user.avatarUrl} />
+						<meta property="twitter:card" content="summary" />
+					</>
+				) : null}
+			</>
+		);
+	}
+
+	function metaBlock() {
+		return (
+			<>
+				{props.profile.noCrawle ? <meta name="robots" content="noindex" /> : null}
+				{props.profile.preventAiLearning ? (
+					<>
+						<meta name="robots" content="noimageai" />
+						<meta name="robots" content="noai" />
+					</>
+				) : null}
+				<meta name="misskey:user-username" content={props.clip.user.username} />
+				<meta name="misskey:user-id" content={props.clip.user.id} />
+				<meta name="misskey:clip-id" content={props.clip.id} />
+			</>
+		);
+	}
+
+	return (
+		<Layout
+			{...props}
+			title={`${props.clip.name} | ${props.instanceName}`}
+			desc={props.clip.description ?? ''}
+			metaSlot={metaBlock()}
+			ogSlot={ogBlock()}
+		>
+		</Layout>
+	);
+}
--- a/packages/backend/src/server/web/views/error.pug
+++ b/packages/backend/src/server/web/views/error.pug
@@ -1,71 +0,0 @@
-doctype html
-
-//
-	-
-	  _____ _         _
-	 |     |_|___ ___| |_ ___ _ _
-	 | | | | |_ -|_ -| '_| -_| | |
-	 |_|_|_|_|___|___|_,_|___|_  |
-	                         |___|
-	 Thank you for using Misskey!
-	 If you are reading this message... how about joining the development?
-	 https://github.com/misskey-dev/misskey
-
-
-html
-
-	head
-		meta(charset='utf-8')
-		meta(name='viewport' content='width=device-width, initial-scale=1')
-		meta(name='application-name' content='Misskey')
-		meta(name='referrer' content='origin')
-
-		title
-			block title
-				= 'An error has occurred... | Misskey'
-
-		style
-			include ../error.css
-
-		script
-			include ../error.js
-
-body
-	svg.icon-warning(xmlns="http://www.w3.org/2000/svg", viewBox="0 0 24 24", stroke-width="2", stroke="currentColor", fill="none", stroke-linecap="round", stroke-linejoin="round")
-		path(stroke="none", d="M0 0h24v24H0z", fill="none")
-		path(d="M12 9v2m0 4v.01")
-		path(d="M5 19h14a2 2 0 0 0 1.84 -2.75l-7.1 -12.25a2 2 0 0 0 -3.5 0l-7.1 12.25a2 2 0 0 0 1.75 2.75")
-
-	h1(data-i18n="title") Failed to initialize Misskey
-
-	button.button-big(onclick="location.reload();")
-		span.button-label-big(data-i18n-reload) Reload
-
-	p(data-i18n="serverError") If reloading after a period of time does not resolve the problem, contact the server administrator with the following ERROR ID.
-
-	div#errors
-		code.
-			ERROR CODE: #{code}
-			ERROR ID: #{id}
-
-	p
-		b(data-i18n="solution") The following actions may solve the problem.
-
-	p(data-i18n="solution1") Update your os and browser
-	p(data-i18n="solution2") Disable an adblocker
-	p(data-i18n="solution3") Clear your browser cache
-	p(data-i18n="solution4") (Tor Browser) Set dom.webaudio.enabled to true
-
-	details(style="color: #86b300;")
-		summary(data-i18n="otherOption") Other options
-		a(href="/flush")
-			button.button-small
-				span.button-label-small(data-i18n="otherOption1") Clear preferences and cache
-		br
-		a(href="/cli")
-			button.button-small
-				span.button-label-small(data-i18n="otherOption2") Start the simple client
-		br
-		a(href="/bios")
-			button.button-small
-				span.button-label-small(data-i18n="otherOption3") Start the repair tool
--- a/packages/backend/src/server/web/views/error.tsx
+++ b/packages/backend/src/server/web/views/error.tsx
@@ -0,0 +1,89 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { comment } from '@/server/web/views/_.js';
+import type { CommonPropsMinimum } from '@/server/web/views/_.js';
+
+export function ErrorPage(props: {
+	title?: string;
+	code: string;
+	id: string;
+}) {
+	return (
+		<>
+			{'<!DOCTYPE html>'}
+			{comment}
+			<html>
+				<head>
+					<meta charset="UTF-8" />
+					<meta name="application-name" content="Misskey" />
+					<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+					<meta name="referrer" content="origin" />
+					<title safe>{props.title ?? 'An error has occurred... | Misskey'}</title>
+					<link rel="stylesheet" href="/static-assets/misc/error.css" />
+					<script src="/static-assets/misc/error.js"></script>
+				</head>
+				<body>
+					<svg
+						class="icon-warning"
+						xmlns="http://www.w3.org/2000/svg"
+						viewBox="0 0 24 24"
+						stroke-width="2"
+						stroke="currentColor"
+						fill="none"
+						stroke-linecap="round"
+						stroke-linejoin="round"
+					>
+						<path stroke="none" d="M0 0h24v24H0z" fill="none" />
+						<path d="M12 9v2m0 4v.01" />
+						<path d="M5 19h14a2 2 0 0 0 1.84 -2.75l-7.1 -12.25a2 2 0 0 0 -3.5 0l-7.1 12.25a2 2 0 0 0 1.75 2.75" />
+					</svg>
+					<h1 data-i18n="title">Failed to initialize Misskey</h1>
+
+					<button class="button-big" onclick="location.reload();">
+						<span class="button-label-big" data-i18n="reload">Reload</span>
+					</button>
+
+					<p data-i18n="serverError">
+						If reloading after a period of time does not resolve the problem, contact the server administrator with the following ERROR ID.
+					</p>
+
+					<div id="errors">
+						<code safe>
+							ERROR CODE: {props.code}<br />
+							ERROR ID: {props.id}
+						</code>
+					</div>
+
+					<p><b data-i18n="solution">The following actions may solve the problem.</b></p>
+
+					<p data-i18n="solution1">Update your os and browser</p>
+					<p data-i18n="solution2">Disable an adblocker</p>
+					<p data-i18n="solution3">Clear your browser cache</p>
+					<p data-i18n="solution4">(Tor Browser) Set dom.webaudio.enabled to true</p>
+
+					<details style="color: #86b300;">
+						<summary data-i18n="otherOption">Other options</summary>
+						<a href="/flush">
+							<button class="button-small">
+								<span class="button-label-small" data-i18n="otherOption1">Clear preferences and cache</span>
+							</button>
+						</a>
+						<a href="/cli">
+							<button class="button-small">
+								<span class="button-label-small" data-i18n="otherOption2">Start the simple client</span>
+							</button>
+						</a>
+						<a href="/bios">
+							<button class="button-small">
+								<span class="button-label-small" data-i18n="otherOption3">Start the repair tool</span>
+							</button>
+						</a>
+					</details>
+				</body>
+			</html>
+		</>
+	);
+}
--- a/packages/backend/src/server/web/views/flash.pug
+++ b/packages/backend/src/server/web/views/flash.pug
@@ -1,35 +0,0 @@
-extends ./base
-
-block vars
-	- const user = flash.user;
-	- const title = flash.title;
-	- const url = `${config.url}/play/${flash.id}`;
-
-block title
-	= `${title} | ${instanceName}`
-
-block desc
-	meta(name='description' content= flash.summary)
-
-block og
-	meta(property='og:type'        content='article')
-	meta(property='og:title'       content= title)
-	meta(property='og:description' content= flash.summary)
-	meta(property='og:url'         content= url)
-	meta(property='og:image'       content= avatarUrl)
-	meta(property='twitter:card'   content='summary')
-
-block meta
-	if profile.noCrawle
-		meta(name='robots' content='noindex')
-	if profile.preventAiLearning
-		meta(name='robots' content='noimageai')
-		meta(name='robots' content='noai')
-
-	meta(name='misskey:user-username' content=user.username)
-	meta(name='misskey:user-id' content=user.id)
-	meta(name='misskey:flash-id' content=flash.id)
-
-	// todo
-	if user.twitter
-		meta(name='twitter:creator' content=`@${user.twitter.screenName}`)
--- a/packages/backend/src/server/web/views/flash.tsx
+++ b/packages/backend/src/server/web/views/flash.tsx
@@ -0,0 +1,59 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Packed } from '@/misc/json-schema.js';
+import type { MiUserProfile } from '@/models/UserProfile.js';
+import type { CommonProps } from '@/server/web/views/_.js';
+import { Layout } from '@/server/web/views/base.js';
+
+export function FlashPage(props: CommonProps<{
+	flash: Packed<'Flash'>;
+	profile: MiUserProfile;
+}>) {
+	function ogBlock() {
+		return (
+			<>
+				<meta property="og:type" content="article" />
+				<meta property="og:title" content={props.flash.title} />
+				<meta property="og:description" content={props.flash.summary} />
+				<meta property="og:url" content={`${props.config.url}/play/${props.flash.id}`} />
+				{props.flash.user.avatarUrl ? (
+					<>
+						<meta property="og:image" content={props.flash.user.avatarUrl} />
+						<meta property="twitter:card" content="summary" />
+					</>
+				) : null}
+			</>
+		);
+	}
+
+	function metaBlock() {
+		return (
+			<>
+				{props.profile.noCrawle ? <meta name="robots" content="noindex" /> : null}
+				{props.profile.preventAiLearning ? (
+					<>
+						<meta name="robots" content="noimageai" />
+						<meta name="robots" content="noai" />
+					</>
+				) : null}
+				<meta name="misskey:user-username" content={props.flash.user.username} />
+				<meta name="misskey:user-id" content={props.flash.user.id} />
+				<meta name="misskey:flash-id" content={props.flash.id} />
+			</>
+		);
+	}
+
+	return (
+		<Layout
+			{...props}
+			title={`${props.flash.title} | ${props.instanceName}`}
+			desc={props.flash.summary}
+			metaSlot={metaBlock()}
+			ogSlot={ogBlock()}
+		>
+		</Layout>
+	);
+}
--- a/packages/backend/src/server/web/views/flush.pug
+++ b/packages/backend/src/server/web/views/flush.pug
@@ -1,51 +0,0 @@
-doctype html
-
-html
-	#msg
-	script.
-		const msg = document.getElementById('msg');
-		const successText = `\nSuccess Flush! <a href="/">Back to Misskey</a>\n成功しました。<a href="/">Misskeyを開き直してください。</a>`;
-
-		if (!document.cookie) {
-			message('Your site data is fully cleared by your browser.');
-			message(successText);
-		} else {
-			message('Your browser does not support Clear-Site-Data header. Start opportunistic flushing.');
-			(async function() {
-				try {
-					localStorage.clear();
-					message('localStorage cleared.');
-
-					const idbPromises = ['MisskeyClient', 'keyval-store'].map((name, i, arr) => new Promise((res, rej) => {
-						const delidb = indexedDB.deleteDatabase(name);
-						delidb.onsuccess = () => res(message(`indexedDB "${name}" cleared. (${i + 1}/${arr.length})`));
-						delidb.onerror = e => rej(e)
-					}));
-
-					await Promise.all(idbPromises);
-
-					if (navigator.serviceWorker.controller) {
-						navigator.serviceWorker.controller.postMessage('clear');
-						await navigator.serviceWorker.getRegistrations()
-							.then(registrations => {
-								return Promise.all(registrations.map(registration => registration.unregister()));
-							})
-							.catch(e => { throw new Error(e) });
-					}
-
-					message(successText);
-				} catch (e) {
-					message(`\n${e}\n\nFlush Failed. <a href="/flush">Please retry.</a>\n失敗しました。<a href="/flush">もう一度試してみてください。</a>`);
-					message(`\nIf you retry more than 3 times, try manually clearing the browser cache or contact to instance admin.\n3回以上試しても失敗する場合、ブラウザのキャッシュを手動で消去し、それでもだめならインスタンス管理者に連絡してみてください。\n`)
-
-					console.error(e);
-					setTimeout(() => {
-						location = '/';
-					}, 10000)
-				}
-			})();
-		}
-
-		function message(text) {
-			msg.insertAdjacentHTML('beforeend', `<p>[${(new Date()).toString()}] ${text.replace(/\n/g,'<br>')}</p>`)
-		}
--- a/packages/backend/src/server/web/views/flush.tsx
+++ b/packages/backend/src/server/web/views/flush.tsx
@@ -0,0 +1,23 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export function FlushPage(props?: {}) {
+	return (
+		<>
+			{'<!DOCTYPE html>'}
+			<html>
+				<head>
+					<meta charset="UTF-8" />
+					<meta name="application-name" content="Misskey" />
+					<title>Clear preferences and cache</title>
+				</head>
+				<body>
+					<div id="msg"></div>
+					<script src="/static-assets/misc/flush.js"></script>
+				</body>
+			</html>
+		</>
+	);
+}
--- a/packages/backend/src/server/web/views/gallery-post.pug
+++ b/packages/backend/src/server/web/views/gallery-post.pug
@@ -1,41 +0,0 @@
-extends ./base
-
-block vars
-	- const user = post.user;
-	- const title = post.title;
-	- const url = `${config.url}/gallery/${post.id}`;
-
-block title
-	= `${title} | ${instanceName}`
-
-block desc
-	meta(name='description' content= post.description)
-
-block og
-	meta(property='og:type'        content='article')
-	meta(property='og:title'       content= title)
-	meta(property='og:description' content= post.description)
-	meta(property='og:url'         content= url)
-	if post.isSensitive
-		meta(property='og:image'     content= avatarUrl)
-		meta(property='twitter:card' content='summary')
-	else
-		meta(property='og:image'       content= post.files[0].thumbnailUrl)
-		meta(property='twitter:card'   content='summary_large_image')
-
-block meta
-	if user.host || profile.noCrawle
-		meta(name='robots' content='noindex')
-	if profile.preventAiLearning
-		meta(name='robots' content='noimageai')
-		meta(name='robots' content='noai')
-
-	meta(name='misskey:user-username' content=user.username)
-	meta(name='misskey:user-id' content=user.id)
-
-	// todo
-	if user.twitter
-		meta(name='twitter:creator' content=`@${user.twitter.screenName}`)
-
-	if !user.host
-		link(rel='alternate' href=url type='application/activity+json')
--- a/packages/backend/src/server/web/views/gallery-post.tsx
+++ b/packages/backend/src/server/web/views/gallery-post.tsx
@@ -0,0 +1,65 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Packed } from '@/misc/json-schema.js';
+import type { MiUserProfile } from '@/models/UserProfile.js';
+import type { CommonProps } from '@/server/web/views/_.js';
+import { Layout } from '@/server/web/views/base.js';
+
+export function GalleryPostPage(props: CommonProps<{
+	galleryPost: Packed<'GalleryPost'>;
+	profile: MiUserProfile;
+}>) {
+	function ogBlock() {
+		return (
+			<>
+				<meta property="og:type" content="article" />
+				<meta property="og:title" content={props.galleryPost.title} />
+				{props.galleryPost.description != null ? <meta property="og:description" content={props.galleryPost.description} /> : null}
+				<meta property="og:url" content={`${props.config.url}/gallery/${props.galleryPost.id}`} />
+				{props.galleryPost.isSensitive && props.galleryPost.user.avatarUrl ? (
+					<>
+						<meta property="og:image" content={props.galleryPost.user.avatarUrl} />
+						<meta property="twitter:card" content="summary" />
+					</>
+				) : null}
+				{!props.galleryPost.isSensitive && props.galleryPost.files != null ? (
+					<>
+						<meta property="og:image" content={props.galleryPost.files[0]!.thumbnailUrl ?? props.galleryPost.files[0]!.url} />
+						<meta property="twitter:card" content="summary_large_image" />
+					</>
+				) : null}
+			</>
+		);
+	}
+
+	function metaBlock() {
+		return (
+			<>
+				{props.profile.noCrawle ? <meta name="robots" content="noindex" /> : null}
+				{props.profile.preventAiLearning ? (
+					<>
+						<meta name="robots" content="noimageai" />
+						<meta name="robots" content="noai" />
+					</>
+				) : null}
+				<meta name="misskey:user-username" content={props.galleryPost.user.username} />
+				<meta name="misskey:user-id" content={props.galleryPost.user.id} />
+				<meta name="misskey:gallery-post-id" content={props.galleryPost.id} />
+			</>
+		);
+	}
+
+	return (
+		<Layout
+			{...props}
+			title={`${props.galleryPost.title} | ${props.instanceName}`}
+			desc={props.galleryPost.description ?? ''}
+			metaSlot={metaBlock()}
+			ogSlot={ogBlock()}
+		>
+		</Layout>
+	);
+}
--- a/packages/backend/src/server/web/views/info-card.pug
+++ b/packages/backend/src/server/web/views/info-card.pug
@@ -1,50 +0,0 @@
-doctype html
-
-html
-
-	head
-		meta(charset='utf-8')
-		meta(name='application-name' content='Misskey')
-		title= meta.name || host
-		style.
-			html, body {
-				margin: 0;
-				padding: 0;
-				min-height: 100vh;
-				background: #fff;
-			}
-
-			#a {
-				display: block;
-			}
-
-			#banner {
-				background-size: cover;
-				background-position: center center;
-			}
-
-			#title {
-				display: inline-block;
-				margin: 24px;
-				padding: 0.5em 0.8em;
-				color: #fff;
-				background: rgba(0, 0, 0, 0.5);
-				font-weight: bold;
-				font-size: 1.3em;
-			}
-
-			#content {
-				overflow: auto;
-				color: #353c3e;
-			}
-
-			#description {
-				margin: 24px;
-			}
-
-	body
-		a#a(href=`https://${host}` target="_blank")
-			header#banner(style=`background-image: url(${meta.bannerUrl})`)
-				div#title= meta.name || host
-		div#content
-			div#description!= meta.description
--- a/packages/backend/src/server/web/views/info-card.tsx
+++ b/packages/backend/src/server/web/views/info-card.tsx
@@ -0,0 +1,40 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { comment, CommonPropsMinimum } from '@/server/web/views/_.js';
+import type { MiMeta } from '@/models/Meta.js';
+
+export function InfoCardPage(props: CommonPropsMinimum<{
+	meta: MiMeta;
+}>) {
+	// 変数名をsafeで始めることでエラーをスキップ
+	const safeDescription = props.meta.description;
+
+	return (
+		<>
+			{'<!DOCTYPE html>'}
+			{comment}
+			<html>
+				<head>
+					<meta charset="UTF-8" />
+					<meta name="application-name" content="Misskey" />
+					<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+					<title safe>{props.meta.name ?? props.config.url}</title>
+					<link rel="stylesheet" href="/static-assets/misc/info-card.css" />
+				</head>
+				<body>
+					<a id="a" href={props.config.url} target="_blank" rel="noopener noreferrer">
+						<header id="banner" style={props.meta.bannerUrl != null ? `background-image: url(${props.meta.bannerUrl});` : ''}>
+							<div id="title" safe>{props.meta.name ?? props.config.url}</div>
+						</header>
+					</a>
+					<div id="content">
+						<div id="description">{safeDescription}</div>
+					</div>
+				</body>
+			</html>
+		</>
+	);
+}
--- a/packages/backend/src/server/web/views/note.pug
+++ b/packages/backend/src/server/web/views/note.pug
@@ -1,62 +0,0 @@
-extends ./base
-
-block vars
-	- const user = note.user;
-	- const title = user.name ? `${user.name} (@${user.username}${user.host ? `@${user.host}` : ''})` : `@${user.username}${user.host ? `@${user.host}` : ''}`;
-	- const url = `${config.url}/notes/${note.id}`;
-	- const isRenote = note.renote && note.text == null && note.fileIds.length == 0 && note.poll == null;
-	- const images = (note.files || []).filter(file => file.type.startsWith('image/') && !file.isSensitive)
-	- const videos = (note.files || []).filter(file => file.type.startsWith('video/') && !file.isSensitive)
-
-block title
-	= `${title} | ${instanceName}`
-
-block desc
-	meta(name='description' content= summary)
-
-block og
-	meta(property='og:type'        content='article')
-	meta(property='og:title'       content= title)
-	meta(property='og:description' content= summary)
-	meta(property='og:url'         content= url)
-	if videos.length
-		each video in videos
-			meta(property='og:video:url'        content= video.url)
-			meta(property='og:video:secure_url' content= video.url)
-			meta(property='og:video:type'       content= video.type)
-			// FIXME: add width and height
-			// FIXME: add embed player for Twitter
-	if images.length
-		meta(property='twitter:card' content='summary_large_image')
-		each image in images
-			meta(property='og:image'     content= image.url)
-	else
-		meta(property='twitter:card' content='summary')
-		meta(property='og:image'     content= avatarUrl)
-
-
-block meta
-	if user.host || isRenote || profile.noCrawle
-		meta(name='robots' content='noindex')
-	if profile.preventAiLearning
-		meta(name='robots' content='noimageai')
-		meta(name='robots' content='noai')
-
-	meta(name='misskey:user-username' content=user.username)
-	meta(name='misskey:user-id' content=user.id)
-	meta(name='misskey:note-id' content=note.id)
-
-	// todo
-	if user.twitter
-		meta(name='twitter:creator' content=`@${user.twitter.screenName}`)
-
-	if note.prev
-		link(rel='prev' href=`${config.url}/notes/${note.prev}`)
-	if note.next
-		link(rel='next' href=`${config.url}/notes/${note.next}`)
-
-	if federationEnabled
-		if !user.host
-			link(rel='alternate' href=url type='application/activity+json')
-		if note.uri
-			link(rel='alternate' href=note.uri type='application/activity+json')
--- a/packages/backend/src/server/web/views/note.tsx
+++ b/packages/backend/src/server/web/views/note.tsx
@@ -0,0 +1,94 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Packed } from '@/misc/json-schema.js';
+import type { MiUserProfile } from '@/models/UserProfile.js';
+import type { CommonProps } from '@/server/web/views/_.js';
+import { Layout } from '@/server/web/views/base.js';
+import { isRenotePacked } from '@/misc/is-renote.js';
+import { getNoteSummary } from '@/misc/get-note-summary.js';
+
+export function NotePage(props: CommonProps<{
+	note: Packed<'Note'>;
+	profile: MiUserProfile;
+}>) {
+	const title = props.note.user.name ? `${props.note.user.name} (@${props.note.user.username}${props.note.user.host ? `@${props.note.user.host}` : ''})` : `@${props.note.user.username}${props.note.user.host ? `@${props.note.user.host}` : ''}`
+	const isRenote = isRenotePacked(props.note);
+	const images = (props.note.files ?? []).filter(f => f.type.startsWith('image/'));
+	const videos = (props.note.files ?? []).filter(f => f.type.startsWith('video/'));
+	const summary = getNoteSummary(props.note);
+
+	function ogBlock() {
+		return (
+			<>
+				<meta property="og:type" content="article" />
+				<meta property="og:title" content={title} />
+				<meta property="og:description" content={summary} />
+				<meta property="og:url" content={`${props.config.url}/notes/${props.note.id}`} />
+				{videos.map(video => (
+					<>
+						<meta property="og:video:url" content={video.url} />
+						<meta property="og:video:secure_url" content={video.url} />
+						<meta property="og:video:type" content={video.type} />
+						{video.thumbnailUrl ? <meta property="og:video:image" content={video.thumbnailUrl} /> : null}
+						{video.properties.width != null ? <meta property="og:video:width" content={video.properties.width.toString()} /> : null}
+						{video.properties.height != null ? <meta property="og:video:height" content={video.properties.height.toString()} /> : null}
+					</>
+				))}
+				{images.length > 0 ? (
+					<>
+						<meta property="twitter:card" content="summary_large_image" />
+						{images.map(image => (
+							<>
+								<meta property="og:image" content={image.url} />
+								{image.properties.width != null ? <meta property="og:image:width" content={image.properties.width.toString()} /> : null}
+								{image.properties.height != null ? <meta property="og:image:height" content={image.properties.height.toString()} /> : null}
+							</>
+						))}
+					</>
+				) : (
+					<>
+						<meta property="twitter:card" content="summary" />
+						<meta property="og:image" content={props.note.user.avatarUrl} />
+					</>
+				)}
+			</>
+		);
+	}
+
+	function metaBlock() {
+		return (
+			<>
+				{props.note.user.host != null || isRenote || props.profile.noCrawle ? <meta name="robots" content="noindex" /> : null}
+				{props.profile.preventAiLearning ? (
+					<>
+						<meta name="robots" content="noimageai" />
+						<meta name="robots" content="noai" />
+					</>
+				) : null}
+				<meta name="misskey:user-username" content={props.note.user.username} />
+				<meta name="misskey:user-id" content={props.note.user.id} />
+				<meta name="misskey:note-id" content={props.note.id} />
+
+				{props.federationEnabled ? (
+					<>
+						{props.note.user.host == null ? <link rel="alternate" type="application/activity+json" href={`${props.config.url}/notes/${props.note.id}`} /> : null}
+						{props.note.uri != null ? <link rel="alternate" type="application/activity+json" href={props.note.uri} /> : null}
+					</>
+				) : null}
+			</>
+		);
+	}
+
+	return (
+		<Layout
+			{...props}
+			title={`${title} | ${props.instanceName}`}
+			desc={summary}
+			metaSlot={metaBlock()}
+			ogSlot={ogBlock()}
+		></Layout>
+	)
+}
--- a/packages/backend/src/server/web/views/oauth.pug
+++ b/packages/backend/src/server/web/views/oauth.pug
@@ -1,11 +0,0 @@
-extends ./base
-
-block meta
-	//- Should be removed by the page when it loads, so that it won't needlessly
-	//- stay when user navigates away via the navigation bar
-	//- XXX: Remove navigation bar in auth page?
-	meta(name='misskey:oauth:transaction-id' content=transactionId)
-	meta(name='misskey:oauth:client-name' content=clientName)
-	if clientLogo
-		meta(name='misskey:oauth:client-logo' content=clientLogo)
-	meta(name='misskey:oauth:scope' content=scope)
--- a/packages/backend/src/server/web/views/oauth.tsx
+++ b/packages/backend/src/server/web/views/oauth.tsx
@@ -0,0 +1,37 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { CommonProps } from '@/server/web/views/_.js';
+import { Layout } from '@/server/web/views/base.js';
+
+export function OAuthPage(props: CommonProps<{
+	transactionId: string;
+	clientName: string;
+	clientLogo?: string;
+	scope: string[];
+}>) {
+
+	//- Should be removed by the page when it loads, so that it won't needlessly
+	//- stay when user navigates away via the navigation bar
+	//- XXX: Remove navigation bar in auth page?
+	function metaBlock() {
+		return (
+			<>
+				<meta name="misskey:oauth:transaction-id" content={props.transactionId} />
+				<meta name="misskey:oauth:client-name" content={props.clientName} />
+				{props.clientLogo ? <meta name="misskey:oauth:client-logo" content={props.clientLogo} /> : null}
+				<meta name="misskey:oauth:scope" content={props.scope.join(' ')} />
+			</>
+		);
+	}
+
+	return (
+		<Layout
+			{...props}
+			metaSlot={metaBlock()}
+		>
+		</Layout>
+	);
+}
--- a/packages/backend/src/server/web/views/page.pug
+++ b/packages/backend/src/server/web/views/page.pug
@@ -1,35 +0,0 @@
-extends ./base
-
-block vars
-	- const user = page.user;
-	- const title = page.title;
-	- const url = `${config.url}/@${user.username}/pages/${page.name}`;
-
-block title
-	= `${title} | ${instanceName}`
-
-block desc
-	meta(name='description' content= page.summary)
-
-block og
-	meta(property='og:type'        content='article')
-	meta(property='og:title'       content= title)
-	meta(property='og:description' content= page.summary)
-	meta(property='og:url'         content= url)
-	meta(property='og:image'       content= page.eyeCatchingImage ? page.eyeCatchingImage.thumbnailUrl : avatarUrl)
-	meta(property='twitter:card'   content= page.eyeCatchingImage ? 'summary_large_image' : 'summary')
-
-block meta
-	if profile.noCrawle
-		meta(name='robots' content='noindex')
-	if profile.preventAiLearning
-		meta(name='robots' content='noimageai')
-		meta(name='robots' content='noai')
-
-	meta(name='misskey:user-username' content=user.username)
-	meta(name='misskey:user-id' content=user.id)
-	meta(name='misskey:page-id' content=page.id)
-
-	// todo
-	if user.twitter
-		meta(name='twitter:creator' content=`@${user.twitter.screenName}`)
--- a/packages/backend/src/server/web/views/page.tsx
+++ b/packages/backend/src/server/web/views/page.tsx
@@ -0,0 +1,64 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Packed } from '@/misc/json-schema.js';
+import type { MiUserProfile } from '@/models/UserProfile.js';
+import type { CommonProps } from '@/server/web/views/_.js';
+import { Layout } from '@/server/web/views/base.js';
+
+export function PagePage(props: CommonProps<{
+	page: Packed<'Page'>;
+	profile: MiUserProfile;
+}>) {
+	function ogBlock() {
+		return (
+			<>
+				<meta property="og:type" content="article" />
+				<meta property="og:title" content={props.page.title} />
+				{props.page.summary != null ? <meta property="og:description" content={props.page.summary} /> : null}
+				<meta property="og:url" content={`${props.config.url}/pages/${props.page.id}`} />
+				{props.page.eyeCatchingImage != null ? (
+					<>
+						<meta property="og:image" content={props.page.eyeCatchingImage.thumbnailUrl ?? props.page.eyeCatchingImage.url} />
+						<meta property="twitter:card" content="summary_large_image" />
+					</>
+				) : props.page.user.avatarUrl ? (
+					<>
+						<meta property="og:image" content={props.page.user.avatarUrl} />
+						<meta property="twitter:card" content="summary" />
+					</>
+				) : null}
+			</>
+		);
+	}
+
+	function metaBlock() {
+		return (
+			<>
+				{props.profile.noCrawle ? <meta name="robots" content="noindex" /> : null}
+				{props.profile.preventAiLearning ? (
+					<>
+						<meta name="robots" content="noimageai" />
+						<meta name="robots" content="noai" />
+					</>
+				) : null}
+				<meta name="misskey:user-username" content={props.page.user.username} />
+				<meta name="misskey:user-id" content={props.page.user.id} />
+				<meta name="misskey:page-id" content={props.page.id} />
+			</>
+		);
+	}
+
+	return (
+		<Layout
+			{...props}
+			title={`${props.page.title} | ${props.instanceName}`}
+			desc={props.page.summary ?? ''}
+			metaSlot={metaBlock()}
+			ogSlot={ogBlock()}
+		>
+		</Layout>
+	);
+}
--- a/packages/backend/src/server/web/views/reversi-game.pug
+++ b/packages/backend/src/server/web/views/reversi-game.pug
@@ -1,20 +0,0 @@
-extends ./base
-
-block vars
-	- const user1 = game.user1;
-	- const user2 = game.user2;
-	- const title = `${user1.username} vs ${user2.username}`;
-	- const url = `${config.url}/reversi/g/${game.id}`;
-
-block title
-	= `${title} | ${instanceName}`
-
-block desc
-	meta(name='description' content='⚫⚪Misskey Reversi⚪⚫')
-
-block og
-	meta(property='og:type'        content='article')
-	meta(property='og:title'       content= title)
-	meta(property='og:description' content='⚫⚪Misskey Reversi⚪⚫')
-	meta(property='og:url'         content= url)
-	meta(property='twitter:card'   content='summary')
--- a/packages/backend/src/server/web/views/reversi-game.tsx
+++ b/packages/backend/src/server/web/views/reversi-game.tsx
@@ -0,0 +1,37 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Packed } from '@/misc/json-schema.js';
+import type { CommonProps } from '@/server/web/views/_.js';
+import { Layout } from '@/server/web/views/base.js';
+
+export function ReversiGamePage(props: CommonProps<{
+	reversiGame: Packed<'ReversiGameDetailed'>;
+}>) {
+	const title = `${props.reversiGame.user1.username} vs ${props.reversiGame.user2.username}`;
+	const description = `⚫⚪Misskey Reversi⚪⚫`;
+
+	function ogBlock() {
+		return (
+			<>
+				<meta property="og:type" content="article" />
+				<meta property="og:title" content={title} />
+				<meta property="og:description" content={description} />
+				<meta property="og:url" content={`${props.config.url}/reversi/g/${props.reversiGame.id}`} />
+				<meta property="twitter:card" content="summary" />
+			</>
+		);
+	}
+
+	return (
+		<Layout
+			{...props}
+			title={`${title} | ${props.instanceName}`}
+			desc={description}
+			ogSlot={ogBlock()}
+		>
+		</Layout>
+	);
+}
--- a/packages/backend/src/server/web/views/user.pug
+++ b/packages/backend/src/server/web/views/user.pug
@@ -1,44 +0,0 @@
-extends ./base
-
-block vars
-	- const title = user.name ? `${user.name} (@${user.username}${user.host ? `@${user.host}` : ''})` : `@${user.username}${user.host ? `@${user.host}` : ''}`;
-	- const url = `${config.url}/@${(user.host ? `${user.username}@${user.host}` : user.username)}`;
-
-block title
-	= `${title} | ${instanceName}`
-
-block desc
-	meta(name='description' content= profile.description)
-
-block og
-	meta(property='og:type'        content='blog')
-	meta(property='og:title'       content= title)
-	meta(property='og:description' content= profile.description)
-	meta(property='og:url'         content= url)
-	meta(property='og:image'       content= avatarUrl)
-	meta(property='twitter:card'   content='summary')
-
-block meta
-	if user.host || profile.noCrawle
-		meta(name='robots' content='noindex')
-	if profile.preventAiLearning
-		meta(name='robots' content='noimageai')
-		meta(name='robots' content='noai')
-
-	meta(name='misskey:user-username' content=user.username)
-	meta(name='misskey:user-id' content=user.id)
-
-	if profile.twitter
-		meta(name='twitter:creator' content=`@${profile.twitter.screenName}`)
-
-	if !sub
-		if federationEnabled
-			if !user.host
-				link(rel='alternate' href=`${config.url}/users/${user.id}` type='application/activity+json')
-			if user.uri
-				link(rel='alternate' href=user.uri type='application/activity+json')
-			if profile.url
-				link(rel='alternate' href=profile.url type='text/html')
-
-	each m in me
-		link(rel='me' href=`${m}`)
--- a/packages/backend/src/server/web/views/user.tsx
+++ b/packages/backend/src/server/web/views/user.tsx
@@ -0,0 +1,74 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Packed } from '@/misc/json-schema.js';
+import type { MiUserProfile } from '@/models/UserProfile.js';
+import type { CommonProps } from '@/server/web/views/_.js';
+import { Layout } from '@/server/web/views/base.js';
+
+export function UserPage(props: CommonProps<{
+	user: Packed<'UserDetailed'>;
+	profile: MiUserProfile;
+	sub?: string;
+}>) {
+	const title = props.user.name ? `${props.user.name} (@${props.user.username}${props.user.host ? `@${props.user.host}` : ''})` : `@${props.user.username}${props.user.host ? `@${props.user.host}` : ''}`;
+	const me = props.profile.fields
+		? props.profile.fields
+			.filter(field => field.value != null && field.value.match(/^https?:/))
+			.map(field => field.value)
+		: [];
+
+	function ogBlock() {
+		return (
+			<>
+				<meta property="og:type" content="blog" />
+				<meta property="og:title" content={title} />
+				{props.user.description != null ? <meta property="og:description" content={props.user.description} /> : null}
+				<meta property="og:url" content={`${props.config.url}/@${props.user.username}`} />
+				<meta property="og:image" content={props.user.avatarUrl} />
+				<meta property="twitter:card" content="summary" />
+			</>
+		);
+	}
+
+	function metaBlock() {
+		return (
+			<>
+				{props.user.host != null || props.profile.noCrawle ? <meta name="robots" content="noindex" /> : null}
+				{props.profile.preventAiLearning ? (
+					<>
+						<meta name="robots" content="noimageai" />
+						<meta name="robots" content="noai" />
+					</>
+				) : null}
+				<meta name="misskey:user-username" content={props.user.username} />
+				<meta name="misskey:user-id" content={props.user.id} />
+
+				{props.sub == null && props.federationEnabled ? (
+					<>
+						{props.user.host == null ? <link rel="alternate" type="application/activity+json" href={`${props.config.url}/users/${props.user.id}`} /> : null}
+						{props.user.uri != null ? <link rel="alternate" type="application/activity+json" href={props.user.uri} /> : null}
+						{props.profile.url != null ? <link rel="alternate" type="text/html" href={props.profile.url} /> : null}
+					</>
+				) : null}
+
+				{me.map((url) => (
+					<link rel="me" href={url} />
+				))}
+			</>
+		);
+	}
+
+	return (
+		<Layout
+			{...props}
+			title={`${props.user.name || props.user.username} (@${props.user.username}) | ${props.instanceName}`}
+			desc={props.user.description ?? ''}
+			metaSlot={metaBlock()}
+			ogSlot={ogBlock()}
+		>
+		</Layout>
+	);
+}