diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4def7e5f88..bc0b3b5c86 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,12 @@
 
 -->
 
+## 12.101.1 (2021/12/29)
+
+### Bugfixes
+- SVG絵文字が表示できないのを修正
+- エクスポートした絵文字の拡張子がfalseになることがあるのを修正
+
 ## 12.101.0 (2021/12/29)
 
 ### Improvements
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 633995c947..a16a76abcf 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -87,7 +87,7 @@ Configuration files are located in [`/.github/workflows`](/.github/workflows).
 
 ## Vue
 Misskey uses Vue(v3) as its front-end framework.
-**When creating a new component, please use the Composition API (and [setup sugar](https://v3.vuejs.org/api/sfc-script-setup.html)) instead of the Options API.**
+**When creating a new component, please use the Composition API (with [setup sugar](https://v3.vuejs.org/api/sfc-script-setup.html) and [ref sugar](https://github.com/vuejs/rfcs/discussions/369)) instead of the Options API.**
 Some of the existing components are implemented in the Options API, but it is an old implementation. Refactors that migrate those components to the Composition API are also welcome.
 
 ## Adding MisskeyRoom items
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index d326099359..b77a54bbf0 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -743,7 +743,7 @@ online: "オンライン"
 active: "アクティブ"
 offline: "オフライン"
 notRecommended: "非推奨"
-botProtection: "Bot防御"
+botProtection: "Botプロテクション"
 instanceBlocking: "インスタンスブロック"
 selectAccount: "アカウントを選択"
 enabled: "有効"
@@ -754,7 +754,7 @@ administration: "管理"
 accounts: "アカウント"
 switch: "切り替え"
 noMaintainerInformationWarning: "管理者情報が設定されていません。"
-noBotProtectionWarning: "Bot防御が設定されていません。"
+noBotProtectionWarning: "Botプロテクションが設定されていません。"
 configure: "設定する"
 postToGallery: "ギャラリーへ投稿"
 gallery: "ギャラリー"
diff --git a/package.json b/package.json
index 0c5becdede..c42b71582b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "misskey",
-	"version": "12.101.0",
+	"version": "12.101.1",
 	"codename": "indigo",
 	"repository": {
 		"type": "git",
diff --git a/packages/backend/src/queue/processors/db/export-custom-emojis.ts b/packages/backend/src/queue/processors/db/export-custom-emojis.ts
index 925b187970..3930b9d6d4 100644
--- a/packages/backend/src/queue/processors/db/export-custom-emojis.ts
+++ b/packages/backend/src/queue/processors/db/export-custom-emojis.ts
@@ -65,7 +65,8 @@ export async function exportCustomEmojis(job: Bull.Job, done: () => void): Promi
 
 	for (const emoji of customEmojis) {
 		const exportId = ulid().toLowerCase();
-		const emojiPath = path + '/' + exportId + '.' + mime.extension(emoji.type);
+		const ext = mime.extension(emoji.type);
+		const emojiPath = path + '/' + exportId + (ext ? '.' + ext : '');
 		fs.writeFileSync(emojiPath, '', 'binary');
 		let downloaded = false;
 
diff --git a/packages/backend/src/server/proxy/proxy-media.ts b/packages/backend/src/server/proxy/proxy-media.ts
index b116b4b961..aba08bb805 100644
--- a/packages/backend/src/server/proxy/proxy-media.ts
+++ b/packages/backend/src/server/proxy/proxy-media.ts
@@ -19,6 +19,7 @@ export async function proxyMedia(ctx: Koa.Context) {
 
 		const { mime, ext } = await detectType(path);
 
+		if (!mime.startsWith('image/')) throw 403;
 		if (!FILE_TYPE_BROWSERSAFE.includes(mime)) throw 403;
 
 		let image: IImage;
diff --git a/packages/backend/src/services/drive/add-file.ts b/packages/backend/src/services/drive/add-file.ts
index a59c9501bc..3d53fe8d34 100644
--- a/packages/backend/src/services/drive/add-file.ts
+++ b/packages/backend/src/services/drive/add-file.ts
@@ -161,7 +161,7 @@ export async function generateAlts(path: string, type: string, generateWeb: bool
 		}
 	}
 
-	if (!['image/jpeg', 'image/png', 'image/webp'].includes(type)) {
+	if (!['image/jpeg', 'image/png', 'image/webp', 'image/svg+xml'].includes(type)) {
 		logger.debug(`web image and thumbnail not created (not an required file)`);
 		return {
 			webpublic: null,
@@ -202,7 +202,7 @@ export async function generateAlts(path: string, type: string, generateWeb: bool
 				webpublic = await convertSharpToJpeg(img, 2048, 2048);
 			} else if (['image/webp'].includes(type)) {
 				webpublic = await convertSharpToWebp(img, 2048, 2048);
-			} else if (['image/png'].includes(type)) {
+			} else if (['image/png', 'image/svg+xml'].includes(type)) {
 				webpublic = await convertSharpToPng(img, 2048, 2048);
 			} else {
 				logger.debug(`web image not created (not an required image)`);
@@ -221,7 +221,7 @@ export async function generateAlts(path: string, type: string, generateWeb: bool
 	try {
 		if (['image/jpeg', 'image/webp'].includes(type)) {
 			thumbnail = await convertSharpToJpeg(img, 498, 280);
-		} else if (['image/png'].includes(type)) {
+		} else if (['image/png', 'image/svg+xml'].includes(type)) {
 			thumbnail = await convertSharpToPngOrJpeg(img, 498, 280);
 		} else {
 			logger.debug(`thumbnail not created (not an required file)`);
diff --git a/packages/client/@types/vue.d.ts b/packages/client/@types/vue.d.ts
index 8cb6130629..f6b66228f6 100644
--- a/packages/client/@types/vue.d.ts
+++ b/packages/client/@types/vue.d.ts
@@ -1,3 +1,5 @@
+/// <reference types="vue/macros-global" />
+
 declare module '*.vue' {
 	import type { DefineComponent } from 'vue';
 	const component: DefineComponent<{}, {}, any>;
diff --git a/packages/client/package.json b/packages/client/package.json
index 198bcbcef6..fe149890dd 100644
--- a/packages/client/package.json
+++ b/packages/client/package.json
@@ -116,7 +116,7 @@
 		"v-debounce": "0.1.2",
 		"vanilla-tilt": "1.7.2",
 		"vue": "3.2.26",
-		"vue-loader": "16.8.3",
+		"vue-loader": "17.0.0",
 		"vue-prism-editor": "2.0.0-alpha.2",
 		"vue-router": "4.0.5",
 		"vue-style-loader": "4.1.3",
diff --git a/packages/client/src/components/drive.vue b/packages/client/src/components/drive.vue
index 46bcd42558..f8d3d810b7 100644
--- a/packages/client/src/components/drive.vue
+++ b/packages/client/src/components/drive.vue
@@ -53,6 +53,7 @@ import XFolder from './drive.folder.vue';
 import XFile from './drive.file.vue';
 import MkButton from './ui/button.vue';
 import * as os from '@/os';
+import { stream } from '@/stream';
 
 export default defineComponent({
 	components: {
@@ -140,7 +141,7 @@ export default defineComponent({
 			});
 		}
 
-		this.connection = markRaw(os.stream.useChannel('drive'));
+		this.connection = markRaw(stream.useChannel('drive'));
 
 		this.connection.on('fileCreated', this.onStreamDriveFileCreated);
 		this.connection.on('fileUpdated', this.onStreamDriveFileUpdated);
diff --git a/packages/client/src/components/follow-button.vue b/packages/client/src/components/follow-button.vue
index 7136261914..b16b22f26f 100644
--- a/packages/client/src/components/follow-button.vue
+++ b/packages/client/src/components/follow-button.vue
@@ -30,6 +30,7 @@
 <script lang="ts">
 import { defineComponent, markRaw } from 'vue';
 import * as os from '@/os';
+import { stream } from '@/stream';
 
 export default defineComponent({
 	props: {
@@ -71,7 +72,7 @@ export default defineComponent({
 	},
 
 	mounted() {
-		this.connection = markRaw(os.stream.useChannel('main'));
+		this.connection = markRaw(stream.useChannel('main'));
 
 		this.connection.on('follow', this.onFollowChange);
 		this.connection.on('unfollow', this.onFollowChange);
diff --git a/packages/client/src/components/form/section.vue b/packages/client/src/components/form/section.vue
index bc2ab966b8..ab9fbe5fcd 100644
--- a/packages/client/src/components/form/section.vue
+++ b/packages/client/src/components/form/section.vue
@@ -7,12 +7,7 @@
 </div>
 </template>
 
-<script lang="ts">
-import { defineComponent } from 'vue';
-
-export default defineComponent({
-
-});
+<script lang="ts" setup>
 </script>
 
 <style lang="scss" scoped>
diff --git a/packages/client/src/components/form/split.vue b/packages/client/src/components/form/split.vue
new file mode 100644
index 0000000000..676b293967
--- /dev/null
+++ b/packages/client/src/components/form/split.vue
@@ -0,0 +1,27 @@
+<template>
+<div class="terlnhxf _formBlock">
+	<slot></slot>
+</div>
+</template>
+
+<script lang="ts" setup>
+const props = withDefaults(defineProps<{
+	minWidth: number;
+}>(), {
+  minWidth: 210,
+});
+
+const minWidth = props.minWidth + 'px';
+</script>
+
+<style lang="scss" scoped>
+.terlnhxf {
+	display: grid;
+	grid-template-columns: repeat(auto-fill, minmax(v-bind('minWidth'), 1fr));
+	grid-gap: 12px;
+
+	> ::v-deep(*) {
+		margin: 0 !important;
+	}
+}
+</style>
diff --git a/packages/client/src/components/form/switch.vue b/packages/client/src/components/form/switch.vue
index aa9b09215e..ac3284e7da 100644
--- a/packages/client/src/components/form/switch.vue
+++ b/packages/client/src/components/form/switch.vue
@@ -13,7 +13,8 @@
 		<i class="check fas fa-check"></i>
 	</span>
 	<span class="label">
-		<span @click="toggle"><slot></slot></span>
+		<!-- TODO: 無名slotの方は廃止 -->
+		<span @click="toggle"><slot name="label"></slot><slot></slot></span>
 		<p class="caption"><slot name="caption"></slot></p>
 	</span>
 </div>
diff --git a/packages/client/src/components/note-detailed.vue b/packages/client/src/components/note-detailed.vue
index 55a02f1e73..a5cb2f0426 100644
--- a/packages/client/src/components/note-detailed.vue
+++ b/packages/client/src/components/note-detailed.vue
@@ -140,6 +140,7 @@ import { checkWordMute } from '@/scripts/check-word-mute';
 import { userPage } from '@/filters/user';
 import { notePage } from '@/filters/note';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import { noteActions, noteViewInterruptors } from '@/store';
 import { reactionPicker } from '@/scripts/reaction-picker';
 import { extractUrlFromMfm } from '@/scripts/extract-url-from-mfm';
@@ -260,7 +261,7 @@ export default defineComponent({
 
 	async created() {
 		if (this.$i) {
-			this.connection = os.stream;
+			this.connection = stream;
 		}
 
 		this.muted = await checkWordMute(this.appearNote, this.$i, this.$store.state.mutedWords);
diff --git a/packages/client/src/components/note.vue b/packages/client/src/components/note.vue
index c4040388a9..3cf924928a 100644
--- a/packages/client/src/components/note.vue
+++ b/packages/client/src/components/note.vue
@@ -122,6 +122,7 @@ import copyToClipboard from '@/scripts/copy-to-clipboard';
 import { checkWordMute } from '@/scripts/check-word-mute';
 import { userPage } from '@/filters/user';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import { noteActions, noteViewInterruptors } from '@/store';
 import { reactionPicker } from '@/scripts/reaction-picker';
 import { extractUrlFromMfm } from '@/scripts/extract-url-from-mfm';
@@ -245,7 +246,7 @@ export default defineComponent({
 
 	async created() {
 		if (this.$i) {
-			this.connection = os.stream;
+			this.connection = stream;
 		}
 
 		this.collapsed = this.appearNote.cw == null && this.appearNote.text && (
diff --git a/packages/client/src/components/notification.vue b/packages/client/src/components/notification.vue
index 0e9fcbf1df..eda702085b 100644
--- a/packages/client/src/components/notification.vue
+++ b/packages/client/src/components/notification.vue
@@ -74,6 +74,7 @@ import { notePage } from '@/filters/note';
 import { userPage } from '@/filters/user';
 import { i18n } from '@/i18n';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import { useTooltip } from '@/scripts/use-tooltip';
 
 export default defineComponent({
@@ -106,7 +107,7 @@ export default defineComponent({
 			if (!props.notification.isRead) {
 				const readObserver = new IntersectionObserver((entries, observer) => {
 					if (!entries.some(entry => entry.isIntersecting)) return;
-					os.stream.send('readNotification', {
+					stream.send('readNotification', {
 						id: props.notification.id
 					});
 					observer.disconnect();
@@ -114,7 +115,7 @@ export default defineComponent({
 
 				readObserver.observe(elRef.value);
 
-				const connection = os.stream.useChannel('main');
+				const connection = stream.useChannel('main');
 				connection.on('readAllNotifications', () => readObserver.disconnect());
 
 				watch(props.notification.isRead, () => {
diff --git a/packages/client/src/components/notifications.vue b/packages/client/src/components/notifications.vue
index b4960359fd..3d091c5f15 100644
--- a/packages/client/src/components/notifications.vue
+++ b/packages/client/src/components/notifications.vue
@@ -28,6 +28,7 @@ import XList from './date-separated-list.vue';
 import XNote from './note.vue';
 import { notificationTypes } from 'misskey-js';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import MkButton from '@/components/ui/button.vue';
 
 export default defineComponent({
@@ -100,7 +101,7 @@ export default defineComponent({
 	},
 
 	mounted() {
-		this.connection = markRaw(os.stream.useChannel('main'));
+		this.connection = markRaw(stream.useChannel('main'));
 		this.connection.on('notification', this.onNotification);
 
 		this.connection.on('readAllNotifications', () => {
@@ -133,7 +134,7 @@ export default defineComponent({
 		onNotification(notification) {
 			const isMuted = !this.allIncludeTypes.includes(notification.type);
 			if (isMuted || document.visibilityState === 'visible') {
-				os.stream.send('readNotification', {
+				stream.send('readNotification', {
 					id: notification.id
 				});
 			}
diff --git a/packages/client/src/components/post-form.vue b/packages/client/src/components/post-form.vue
index 4265c575e2..24f35da2e9 100644
--- a/packages/client/src/components/post-form.vue
+++ b/packages/client/src/components/post-form.vue
@@ -74,11 +74,11 @@ import { formatTimeString } from '@/scripts/format-time-string';
 import { Autocomplete } from '@/scripts/autocomplete';
 import { noteVisibilities } from 'misskey-js';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import { selectFiles } from '@/scripts/select-file';
 import { defaultStore, notePostInterruptors, postFormActions } from '@/store';
 import { throttle } from 'throttle-debounce';
 import MkInfo from '@/components/ui/info.vue';
-import { defaultStore } from '@/store';
 
 export default defineComponent({
 	components: {
@@ -176,7 +176,7 @@ export default defineComponent({
 			imeText: '',
 			typing: throttle(3000, () => {
 				if (this.channel) {
-					os.stream.send('typingOnChannel', { channel: this.channel.id });
+					stream.send('typingOnChannel', { channel: this.channel.id });
 				}
 			}),
 			postFormActions,
diff --git a/packages/client/src/components/taskmanager.vue b/packages/client/src/components/taskmanager.vue
index 6901d88c2c..c5d2c6d8f8 100644
--- a/packages/client/src/components/taskmanager.vue
+++ b/packages/client/src/components/taskmanager.vue
@@ -83,6 +83,7 @@ import MkTab from '@/components/tab.vue';
 import MkButton from '@/components/ui/button.vue';
 import follow from '@/directives/follow-append';
 import * as os from '@/os';
+import { stream } from '@/stream';
 
 export default defineComponent({
 	components: {
@@ -104,15 +105,15 @@ export default defineComponent({
 		const connections = shallowRef([]);
 		const pools = shallowRef([]);
 		const refreshStreamInfo = () => {
-			console.log(os.stream.sharedConnectionPools, os.stream.sharedConnections, os.stream.nonSharedConnections);
-			const conn = os.stream.sharedConnections.map(c => ({
+			console.log(stream.sharedConnectionPools, stream.sharedConnections, stream.nonSharedConnections);
+			const conn = stream.sharedConnections.map(c => ({
 				id: c.id, name: c.name, channel: c.channel, users: c.pool.users, in: c.inCount, out: c.outCount,
-			})).concat(os.stream.nonSharedConnections.map(c => ({
+			})).concat(stream.nonSharedConnections.map(c => ({
 				id: c.id, name: c.name, channel: c.channel, users: null, in: c.inCount, out: c.outCount,
 			})));
 			conn.sort((a, b) => (a.id > b.id) ? 1 : -1);
 			connections.value = conn;
-			pools.value = os.stream.sharedConnectionPools;
+			pools.value = stream.sharedConnectionPools;
 		};
 		const interval = setInterval(refreshStreamInfo, 1000);
 		onBeforeUnmount(() => {
diff --git a/packages/client/src/components/timeline.vue b/packages/client/src/components/timeline.vue
index f8a800872f..53697671b2 100644
--- a/packages/client/src/components/timeline.vue
+++ b/packages/client/src/components/timeline.vue
@@ -6,6 +6,7 @@
 import { defineComponent, markRaw } from 'vue';
 import XNotes from './notes.vue';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import * as sound from '@/scripts/sound';
 
 export default defineComponent({
@@ -92,33 +93,33 @@ export default defineComponent({
 			this.query = {
 				antennaId: this.antenna
 			};
-			this.connection = markRaw(os.stream.useChannel('antenna', {
+			this.connection = markRaw(stream.useChannel('antenna', {
 				antennaId: this.antenna
 			}));
 			this.connection.on('note', prepend);
 		} else if (this.src == 'home') {
 			endpoint = 'notes/timeline';
-			this.connection = markRaw(os.stream.useChannel('homeTimeline'));
+			this.connection = markRaw(stream.useChannel('homeTimeline'));
 			this.connection.on('note', prepend);
 
-			this.connection2 = markRaw(os.stream.useChannel('main'));
+			this.connection2 = markRaw(stream.useChannel('main'));
 			this.connection2.on('follow', onChangeFollowing);
 			this.connection2.on('unfollow', onChangeFollowing);
 		} else if (this.src == 'local') {
 			endpoint = 'notes/local-timeline';
-			this.connection = markRaw(os.stream.useChannel('localTimeline'));
+			this.connection = markRaw(stream.useChannel('localTimeline'));
 			this.connection.on('note', prepend);
 		} else if (this.src == 'social') {
 			endpoint = 'notes/hybrid-timeline';
-			this.connection = markRaw(os.stream.useChannel('hybridTimeline'));
+			this.connection = markRaw(stream.useChannel('hybridTimeline'));
 			this.connection.on('note', prepend);
 		} else if (this.src == 'global') {
 			endpoint = 'notes/global-timeline';
-			this.connection = markRaw(os.stream.useChannel('globalTimeline'));
+			this.connection = markRaw(stream.useChannel('globalTimeline'));
 			this.connection.on('note', prepend);
 		} else if (this.src == 'mentions') {
 			endpoint = 'notes/mentions';
-			this.connection = markRaw(os.stream.useChannel('main'));
+			this.connection = markRaw(stream.useChannel('main'));
 			this.connection.on('mention', prepend);
 		} else if (this.src == 'directs') {
 			endpoint = 'notes/mentions';
@@ -130,14 +131,14 @@ export default defineComponent({
 					prepend(note);
 				}
 			};
-			this.connection = markRaw(os.stream.useChannel('main'));
+			this.connection = markRaw(stream.useChannel('main'));
 			this.connection.on('mention', onNote);
 		} else if (this.src == 'list') {
 			endpoint = 'notes/user-list-timeline';
 			this.query = {
 				listId: this.list
 			};
-			this.connection = markRaw(os.stream.useChannel('userList', {
+			this.connection = markRaw(stream.useChannel('userList', {
 				listId: this.list
 			}));
 			this.connection.on('note', prepend);
@@ -148,7 +149,7 @@ export default defineComponent({
 			this.query = {
 				channelId: this.channel
 			};
-			this.connection = markRaw(os.stream.useChannel('channel', {
+			this.connection = markRaw(stream.useChannel('channel', {
 				channelId: this.channel
 			}));
 			this.connection.on('note', prepend);
diff --git a/packages/client/src/components/user-select-dialog.vue b/packages/client/src/components/user-select-dialog.vue
index ba2975478b..dbef34d547 100644
--- a/packages/client/src/components/user-select-dialog.vue
+++ b/packages/client/src/components/user-select-dialog.vue
@@ -1,5 +1,5 @@
 <template>
-<XModalWindow ref="dialog"
+<XModalWindow ref="dialogEl"
 	:with-ok-button="true"
 	:ok-button-disabled="selected == null"
 	@click="cancel()"
@@ -8,20 +8,20 @@
 	@closed="$emit('closed')"
 >
 	<template #header>{{ $ts.selectUser }}</template>
-	<div class="tbhwbxda _monolithic_">
-		<div class="_section">
-			<div class="_inputSplit">
-				<MkInput ref="username" v-model="username" class="input" @update:modelValue="search">
+	<div class="tbhwbxda">
+		<div class="form">
+			<FormSplit :min-width="170">
+				<MkInput ref="usernameEl" v-model="username" @update:modelValue="search">
 					<template #label>{{ $ts.username }}</template>
 					<template #prefix>@</template>
 				</MkInput>
-				<MkInput v-model="host" class="input" @update:modelValue="search">
+				<MkInput v-model="host" @update:modelValue="search">
 					<template #label>{{ $ts.host }}</template>
 					<template #prefix>@</template>
 				</MkInput>
-			</div>
+			</FormSplit>
 		</div>
-		<div v-if="username != '' || host != ''" class="_section result" :class="{ hit: users.length > 0 }">
+		<div v-if="username != '' || host != ''" class="result" :class="{ hit: users.length > 0 }">
 			<div v-if="users.length > 0" class="users">
 				<div v-for="user in users" :key="user.id" class="user" :class="{ selected: selected && selected.id === user.id }" @click="selected = user" @dblclick="ok()">
 					<MkAvatar :user="user" class="avatar" :show-indicator="true"/>
@@ -35,7 +35,7 @@
 				<span>{{ $ts.noUsers }}</span>
 			</div>
 		</div>
-		<div v-if="username == '' && host == ''" class="_section recent">
+		<div v-if="username == '' && host == ''" class="recent">
 			<div class="users">
 				<div v-for="user in recentUsers" :key="user.id" class="user" :class="{ selected: selected && selected.id === user.id }" @click="selected = user" @dblclick="ok()">
 					<MkAvatar :user="user" class="avatar" :show-indicator="true"/>
@@ -50,87 +50,89 @@
 </XModalWindow>
 </template>
 
-<script lang="ts">
-import { defineComponent } from 'vue';
-import MkInput from './form/input.vue';
+<script lang="ts" setup>
+import { nextTick, onMounted } from 'vue';
+import * as misskey from 'misskey-js';
+import MkInput from '@/components/form/input.vue';
+import FormSplit from '@/components/form/split.vue';
 import XModalWindow from '@/components/ui/modal-window.vue';
 import * as os from '@/os';
+import { defaultStore } from '@/store';
 
-export default defineComponent({
-	components: {
-		MkInput,
-		XModalWindow,
-	},
+const emit = defineEmits<{
+  (e: 'ok', selected: misskey.entities.UserDetailed): void;
+  (e: 'cancel'): void;
+	(e: 'closed'): void;
+}>();
 
-	props: {
-	},
+let username = $ref('');
+let host = $ref('');
+let users: misskey.entities.UserDetailed[] = $ref([]);
+let recentUsers: misskey.entities.UserDetailed[] = $ref([]);
+let selected: misskey.entities.UserDetailed | null = $ref(null);
+let usernameEl: HTMLElement = $ref();
+let dialogEl = $ref();
 
-	emits: ['ok', 'cancel', 'closed'],
-
-	data() {
-		return {
-			username: '',
-			host: '',
-			recentUsers: [],
-			users: [],
-			selected: null,
-		};
-	},
-
-	async mounted() {
-		this.focus();
-
-		this.$nextTick(() => {
-			this.focus();
-		});
-
-		this.recentUsers = await os.api('users/show', {
-			userIds: this.$store.state.recentlyUsedUsers
-		});
-	},
-
-	methods: {
-		search() {
-			if (this.username == '' && this.host == '') {
-				this.users = [];
-				return;
-			}
-			os.api('users/search-by-username-and-host', {
-				username: this.username,
-				host: this.host,
-				limit: 10,
-				detail: false
-			}).then(users => {
-				this.users = users;
-			});
-		},
-
-		focus() {
-			this.$refs.username.focus();
-		},
-
-		ok() {
-			this.$emit('ok', this.selected);
-			this.$refs.dialog.close();
-
-			// 最近使ったユーザー更新
-			let recents = this.$store.state.recentlyUsedUsers;
-			recents = recents.filter(x => x !== this.selected.id);
-			recents.unshift(this.selected.id);
-			this.$store.set('recentlyUsedUsers', recents.splice(0, 16));
-		},
-
-		cancel() {
-			this.$emit('cancel');
-			this.$refs.dialog.close();
-		},
+const focus = () => {
+	if (usernameEl) {
+		usernameEl.focus();
 	}
+};
+
+const search = () => {
+	if (username === '' && host === '') {
+		users = [];
+		return;
+	}
+	os.api('users/search-by-username-and-host', {
+		username: username,
+		host: host,
+		limit: 10,
+		detail: false
+	}).then(_users => {
+		users = _users;
+	});
+};
+
+const ok = () => {
+	if (selected == null) return;
+	emit('ok', selected);
+	dialogEl.close();
+
+	// 最近使ったユーザー更新
+	let recents = defaultStore.state.recentlyUsedUsers;
+	recents = recents.filter(x => x !== selected.id);
+	recents.unshift(selected.id);
+	defaultStore.set('recentlyUsedUsers', recents.splice(0, 16));
+};
+
+const cancel = () => {
+	emit('cancel');
+	dialogEl.close();
+};
+
+onMounted(() => {
+	focus();
+
+	nextTick(() => {
+		focus();
+	});
+
+	os.api('users/show', {
+		userIds: defaultStore.state.recentlyUsedUsers,
+	}).then(users => {
+		recentUsers = users;
+	});
 });
 </script>
 
 <style lang="scss" scoped>
 .tbhwbxda {
-	> ._section {
+	> .form {
+		padding: 0 var(--root-margin);
+	}
+
+	> .result, > .recent {
 		display: flex;
 		flex-direction: column;
 		overflow: auto;
diff --git a/packages/client/src/init.ts b/packages/client/src/init.ts
index 8a37e82471..0da87dfb07 100644
--- a/packages/client/src/init.ts
+++ b/packages/client/src/init.ts
@@ -26,7 +26,8 @@ import { router } from '@/router';
 import { applyTheme } from '@/scripts/theme';
 import { isDeviceDarkmode } from '@/scripts/is-device-darkmode';
 import { i18n } from '@/i18n';
-import { stream, confirm, alert, post, popup, toast } from '@/os';
+import { confirm, alert, post, popup, toast } from '@/os';
+import { stream } from '@/stream';
 import * as sound from '@/scripts/sound';
 import { $i, refreshAccount, login, updateAccount, signout } from '@/account';
 import { defaultStore, ColdDeviceStorage } from '@/store';
diff --git a/packages/client/src/os.ts b/packages/client/src/os.ts
index 4ed69e0ec0..1ea205d5c8 100644
--- a/packages/client/src/os.ts
+++ b/packages/client/src/os.ts
@@ -12,8 +12,6 @@ import { resolve } from '@/router';
 import { $i } from '@/account';
 import { defaultStore } from '@/store';
 
-export const stream = markRaw(new Misskey.Stream(url, $i));
-
 export const pendingApiRequestsCount = ref(0);
 let apiRequestsCount = 0; // for debug
 export const apiRequests = ref([]); // for debug
diff --git a/packages/client/src/pages/about.vue b/packages/client/src/pages/about.vue
index 04f68b7201..618e569839 100644
--- a/packages/client/src/pages/about.vue
+++ b/packages/client/src/pages/about.vue
@@ -24,7 +24,7 @@
 		</FormSection>
 
 		<FormSection>
-			<div class="_inputSplit _formBlock">
+			<FormSplit>
 				<MkKeyValue class="_formBlock">
 					<template #key>{{ $ts.administrator }}</template>
 					<template #value>{{ $instance.maintainerName }}</template>
@@ -33,14 +33,14 @@
 					<template #key>{{ $ts.contact }}</template>
 					<template #value>{{ $instance.maintainerEmail }}</template>
 				</MkKeyValue>
-			</div>
+			</FormSplit>
 			<FormLink v-if="$instance.tosUrl" :to="$instance.tosUrl" class="_formBlock" external>{{ $ts.tos }}</FormLink>
 		</FormSection>
 
 		<FormSuspense :p="initStats">
 			<FormSection>
 				<template #label>{{ $ts.statistics }}</template>
-				<div class="_inputSplit">
+				<FormSplit>
 					<MkKeyValue class="_formBlock">
 						<template #key>{{ $ts.users }}</template>
 						<template #value>{{ number(stats.originalUsersCount) }}</template>
@@ -49,7 +49,7 @@
 						<template #key>{{ $ts.notes }}</template>
 						<template #value>{{ number(stats.originalNotesCount) }}</template>
 					</MkKeyValue>
-				</div>
+				</FormSplit>
 			</FormSection>
 		</FormSuspense>
 
@@ -73,6 +73,7 @@ import { version, instanceName } from '@/config';
 import FormLink from '@/components/form/link.vue';
 import FormSection from '@/components/form/section.vue';
 import FormSuspense from '@/components/form/suspense.vue';
+import FormSplit from '@/components/form/split.vue';
 import MkKeyValue from '@/components/key-value.vue';
 import * as os from '@/os';
 import number from '@/filters/number';
@@ -85,6 +86,7 @@ export default defineComponent({
 		FormSection,
 		FormLink,
 		FormSuspense,
+		FormSplit,
 	},
 
 	data() {
diff --git a/packages/client/src/pages/admin/ads.vue b/packages/client/src/pages/admin/ads.vue
index d12ed8563e..0396dae10c 100644
--- a/packages/client/src/pages/admin/ads.vue
+++ b/packages/client/src/pages/admin/ads.vue
@@ -23,14 +23,14 @@
 				<MkRadio v-model="ad.priority" value="low">{{ $ts.low }}</MkRadio>
 			</div>
 			-->
-			<div class="_inputSplit">
+			<FormSplit>
 				<MkInput v-model="ad.ratio" type="number">
 					<template #label>{{ $ts.ratio }}</template>
 				</MkInput>
 				<MkInput v-model="ad.expiresAt" type="date">
 					<template #label>{{ $ts.expiration }}</template>
 				</MkInput>
-			</div>
+			</FormSplit>
 			<MkTextarea v-model="ad.memo" class="_formBlock">
 				<template #label>{{ $ts.memo }}</template>
 			</MkTextarea>
@@ -49,6 +49,7 @@ import MkButton from '@/components/ui/button.vue';
 import MkInput from '@/components/form/input.vue';
 import MkTextarea from '@/components/form/textarea.vue';
 import FormRadios from '@/components/form/radios.vue';
+import FormSplit from '@/components/form/split.vue';
 import * as os from '@/os';
 import * as symbols from '@/symbols';
 
@@ -58,6 +59,7 @@ export default defineComponent({
 		MkInput,
 		MkTextarea,
 		FormRadios,
+		FormSplit,
 	},
 
 	emits: ['info'],
diff --git a/packages/client/src/pages/admin/email-settings.vue b/packages/client/src/pages/admin/email-settings.vue
index 873a853918..0799755a4d 100644
--- a/packages/client/src/pages/admin/email-settings.vue
+++ b/packages/client/src/pages/admin/email-settings.vue
@@ -1,50 +1,55 @@
 <template>
-<FormBase>
+<MkSpacer :content-max="700" :margin-min="16" :margin-max="32">
 	<FormSuspense :p="init">
-		<FormSwitch v-model="enableEmail">{{ $ts.enableEmail }}<template #desc>{{ $ts.emailConfigInfo }}</template></FormSwitch>
+		<div class="_formRoot">
+			<FormSwitch v-model="enableEmail" class="_formBlock">
+				<template #label>{{ $ts.enableEmail }}</template>
+				<template #caption>{{ $ts.emailConfigInfo }}</template>
+			</FormSwitch>
 
-		<template v-if="enableEmail">
-			<FormInput v-model="email" type="email">
-				<span>{{ $ts.emailAddress }}</span>
-			</FormInput>
+			<template v-if="enableEmail">
+				<FormInput v-model="email" type="email" class="_formBlock">
+					<template #label>{{ $ts.emailAddress }}</template>
+				</FormInput>
 
-			<div v-sticky-container class="_debobigegoItem _debobigegoNoConcat">
-				<div class="_debobigegoLabel">{{ $ts.smtpConfig }}</div>
-				<div class="main">
-					<FormInput v-model="smtpHost">
-						<span>{{ $ts.smtpHost }}</span>
-					</FormInput>
-					<FormInput v-model="smtpPort" type="number">
-						<span>{{ $ts.smtpPort }}</span>
-					</FormInput>
-					<FormInput v-model="smtpUser">
-						<span>{{ $ts.smtpUser }}</span>
-					</FormInput>
-					<FormInput v-model="smtpPass" type="password">
-						<span>{{ $ts.smtpPass }}</span>
-					</FormInput>
-					<FormInfo>{{ $ts.emptyToDisableSmtpAuth }}</FormInfo>
-					<FormSwitch v-model="smtpSecure">{{ $ts.smtpSecure }}<template #desc>{{ $ts.smtpSecureInfo }}</template></FormSwitch>
-				</div>
-			</div>
-
-			<FormButton @click="testEmail">{{ $ts.testEmail }}</FormButton>
-		</template>
-
-		<FormButton primary @click="save"><i class="fas fa-save"></i> {{ $ts.save }}</FormButton>
+				<FormSection>
+					<template #label>{{ $ts.smtpConfig }}</template>
+					<FormSplit :min-width="280">
+						<FormInput v-model="smtpHost" class="_formBlock">
+							<template #label>{{ $ts.smtpHost }}</template>
+						</FormInput>
+						<FormInput v-model="smtpPort" type="number" class="_formBlock">
+							<template #label>{{ $ts.smtpPort }}</template>
+						</FormInput>
+					</FormSplit>
+					<FormSplit :min-width="280">
+						<FormInput v-model="smtpUser" class="_formBlock">
+							<template #label>{{ $ts.smtpUser }}</template>
+						</FormInput>
+						<FormInput v-model="smtpPass" type="password" class="_formBlock">
+							<template #label>{{ $ts.smtpPass }}</template>
+						</FormInput>
+					</FormSplit>
+					<FormInfo class="_formBlock">{{ $ts.emptyToDisableSmtpAuth }}</FormInfo>
+					<FormSwitch v-model="smtpSecure" class="_formBlock">
+						<template #label>{{ $ts.smtpSecure }}</template>
+						<template #caption>{{ $ts.smtpSecureInfo }}</template>
+					</FormSwitch>
+				</FormSection>
+			</template>
+		</div>
 	</FormSuspense>
-</FormBase>
+</MkSpacer>
 </template>
 
 <script lang="ts">
 import { defineComponent } from 'vue';
-import FormSwitch from '@/components/debobigego/switch.vue';
-import FormInput from '@/components/debobigego/input.vue';
-import FormButton from '@/components/debobigego/button.vue';
-import FormBase from '@/components/debobigego/base.vue';
-import FormGroup from '@/components/debobigego/group.vue';
-import FormInfo from '@/components/debobigego/info.vue';
-import FormSuspense from '@/components/debobigego/suspense.vue';
+import FormSwitch from '@/components/form/switch.vue';
+import FormInput from '@/components/form/input.vue';
+import FormInfo from '@/components/ui/info.vue';
+import FormSuspense from '@/components/form/suspense.vue';
+import FormSplit from '@/components/form/split.vue';
+import FormSection from '@/components/form/section.vue';
 import * as os from '@/os';
 import * as symbols from '@/symbols';
 import { fetchInstance } from '@/instance';
@@ -53,9 +58,8 @@ export default defineComponent({
 	components: {
 		FormSwitch,
 		FormInput,
-		FormBase,
-		FormGroup,
-		FormButton,
+		FormSplit,
+		FormSection,
 		FormInfo,
 		FormSuspense,
 	},
@@ -68,6 +72,16 @@ export default defineComponent({
 				title: this.$ts.emailServer,
 				icon: 'fas fa-envelope',
 				bg: 'var(--bg)',
+				actions: [{
+					asFullButton: true,
+					text: this.$ts.testEmail,
+					handler: this.testEmail,
+				}, {
+					asFullButton: true,
+					icon: 'fas fa-check',
+					text: this.$ts.save,
+					handler: this.save,
+				}],
 			},
 			enableEmail: false,
 			email: null,
diff --git a/packages/client/src/pages/admin/emojis.vue b/packages/client/src/pages/admin/emojis.vue
index 49277325a0..df5d234d6f 100644
--- a/packages/client/src/pages/admin/emojis.vue
+++ b/packages/client/src/pages/admin/emojis.vue
@@ -23,7 +23,7 @@
 		</div>
 
 		<div v-else-if="tab === 'remote'" class="remote">
-			<div class="_inputSplit">
+			<FormSplit>
 				<MkInput v-model="queryRemote" :debounce="true" type="search">
 					<template #prefix><i class="fas fa-search"></i></template>
 					<template #label>{{ $ts.search }}</template>
@@ -31,7 +31,7 @@
 				<MkInput v-model="host" :debounce="true">
 					<template #label>{{ $ts.host }}</template>
 				</MkInput>
-			</div>
+			</FormSplit>
 			<MkPagination ref="remoteEmojis" :pagination="remotePagination">
 				<template #empty><span>{{ $ts.noCustomEmojis }}</span></template>
 				<template v-slot="{items}">
@@ -57,6 +57,7 @@ import MkButton from '@/components/ui/button.vue';
 import MkInput from '@/components/form/input.vue';
 import MkPagination from '@/components/ui/pagination.vue';
 import MkTab from '@/components/tab.vue';
+import FormSplit from '@/components/form/split.vue';
 import { selectFiles } from '@/scripts/select-file';
 import * as os from '@/os';
 import * as symbols from '@/symbols';
@@ -67,6 +68,7 @@ export default defineComponent({
 		MkButton,
 		MkInput,
 		MkPagination,
+		FormSplit,
 	},
 
 	emits: ['info'],
diff --git a/packages/client/src/pages/admin/files-settings.vue b/packages/client/src/pages/admin/files-settings.vue
deleted file mode 100644
index df25bd0fb2..0000000000
--- a/packages/client/src/pages/admin/files-settings.vue
+++ /dev/null
@@ -1,93 +0,0 @@
-<template>
-<FormBase>
-	<FormSuspense :p="init">
-		<FormSwitch v-model="cacheRemoteFiles">
-			{{ $ts.cacheRemoteFiles }}
-			<template #desc>{{ $ts.cacheRemoteFilesDescription }}</template>
-		</FormSwitch>
-
-		<FormSwitch v-model="proxyRemoteFiles">
-			{{ $ts.proxyRemoteFiles }}
-			<template #desc>{{ $ts.proxyRemoteFilesDescription }}</template>
-		</FormSwitch>
-
-		<FormInput v-model="localDriveCapacityMb" type="number">
-			<span>{{ $ts.driveCapacityPerLocalAccount }}</span>
-			<template #suffix>MB</template>
-			<template #desc>{{ $ts.inMb }}</template>
-		</FormInput>
-
-		<FormInput v-model="remoteDriveCapacityMb" type="number" :disabled="!cacheRemoteFiles">
-			<span>{{ $ts.driveCapacityPerRemoteAccount }}</span>
-			<template #suffix>MB</template>
-			<template #desc>{{ $ts.inMb }}</template>
-		</FormInput>
-
-		<FormButton primary @click="save"><i class="fas fa-save"></i> {{ $ts.save }}</FormButton>
-	</FormSuspense>
-</FormBase>
-</template>
-
-<script lang="ts">
-import { defineComponent } from 'vue';
-import FormSwitch from '@/components/debobigego/switch.vue';
-import FormInput from '@/components/debobigego/input.vue';
-import FormButton from '@/components/debobigego/button.vue';
-import FormBase from '@/components/debobigego/base.vue';
-import FormGroup from '@/components/debobigego/group.vue';
-import FormSuspense from '@/components/debobigego/suspense.vue';
-import * as os from '@/os';
-import * as symbols from '@/symbols';
-import { fetchInstance } from '@/instance';
-
-export default defineComponent({
-	components: {
-		FormSwitch,
-		FormInput,
-		FormBase,
-		FormGroup,
-		FormButton,
-		FormSuspense,
-	},
-
-	emits: ['info'],
-
-	data() {
-		return {
-			[symbols.PAGE_INFO]: {
-				title: this.$ts.files,
-				icon: 'fas fa-cloud',
-				bg: 'var(--bg)',
-			},
-			cacheRemoteFiles: false,
-			proxyRemoteFiles: false,
-			localDriveCapacityMb: 0,
-			remoteDriveCapacityMb: 0,
-		}
-	},
-
-	async mounted() {
-		this.$emit('info', this[symbols.PAGE_INFO]);
-	},
-
-	methods: {
-		async init() {
-			const meta = await os.api('meta', { detail: true });
-			this.cacheRemoteFiles = meta.cacheRemoteFiles;
-			this.proxyRemoteFiles = meta.proxyRemoteFiles;
-			this.localDriveCapacityMb = meta.driveCapacityPerLocalUserMb;
-			this.remoteDriveCapacityMb = meta.driveCapacityPerRemoteUserMb;
-		},
-		save() {
-			os.apiWithDialog('admin/update-meta', {
-				cacheRemoteFiles: this.cacheRemoteFiles,
-				proxyRemoteFiles: this.proxyRemoteFiles,
-				localDriveCapacityMb: parseInt(this.localDriveCapacityMb, 10),
-				remoteDriveCapacityMb: parseInt(this.remoteDriveCapacityMb, 10),
-			}).then(() => {
-				fetchInstance();
-			});
-		}
-	}
-});
-</script>
diff --git a/packages/client/src/pages/admin/index.vue b/packages/client/src/pages/admin/index.vue
index e363d1bd03..56b6b25a74 100644
--- a/packages/client/src/pages/admin/index.vue
+++ b/packages/client/src/pages/admin/index.vue
@@ -3,7 +3,7 @@
 	<div v-if="!narrow || page == null" class="nav">
 		<MkHeader :info="header"></MkHeader>
 	
-		<MkSpacer :content-max="700">
+		<MkSpacer :content-max="700" :margin-min="16">
 			<div class="lxpfedzu">
 				<div class="banner">
 					<img :src="$instance.iconUrl || '/favicon.ico'" alt="" class="icon"/>
@@ -162,11 +162,6 @@ export default defineComponent({
 				text: i18n.locale.general,
 				to: '/admin/settings',
 				active: page.value === 'settings',
-			}, {
-				icon: 'fas fa-cloud',
-				text: i18n.locale.files,
-				to: '/admin/files-settings',
-				active: page.value === 'files-settings',
 			}, {
 				icon: 'fas fa-envelope',
 				text: i18n.locale.emailServer,
@@ -236,7 +231,6 @@ export default defineComponent({
 				case 'database': return defineAsyncComponent(() => import('./database.vue'));
 				case 'abuses': return defineAsyncComponent(() => import('./abuses.vue'));
 				case 'settings': return defineAsyncComponent(() => import('./settings.vue'));
-				case 'files-settings': return defineAsyncComponent(() => import('./files-settings.vue'));
 				case 'email-settings': return defineAsyncComponent(() => import('./email-settings.vue'));
 				case 'object-storage': return defineAsyncComponent(() => import('./object-storage.vue'));
 				case 'security': return defineAsyncComponent(() => import('./security.vue'));
diff --git a/packages/client/src/pages/admin/metrics.vue b/packages/client/src/pages/admin/metrics.vue
index 05b64b235c..f566061ceb 100644
--- a/packages/client/src/pages/admin/metrics.vue
+++ b/packages/client/src/pages/admin/metrics.vue
@@ -101,6 +101,7 @@ const alpha = (hex, a) => {
 	return `rgba(${r}, ${g}, ${b}, ${a})`;
 };
 import * as os from '@/os';
+import { stream } from '@/stream';
 
 export default defineComponent({
 	components: {
@@ -119,7 +120,7 @@ export default defineComponent({
 			stats: null,
 			serverInfo: null,
 			connection: null,
-			queueConnection: markRaw(os.stream.useChannel('queueStats')),
+			queueConnection: markRaw(stream.useChannel('queueStats')),
 			memUsage: 0,
 			chartCpuMem: null,
 			chartNet: null,
@@ -150,7 +151,7 @@ export default defineComponent({
 		os.api('admin/server-info', {}).then(res => {
 			this.serverInfo = res;
 
-			this.connection = markRaw(os.stream.useChannel('serverStats'));
+			this.connection = markRaw(stream.useChannel('serverStats'));
 			this.connection.on('stats', this.onStats);
 			this.connection.on('statsLog', this.onStatsLog);
 			this.connection.send('requestLog', {
diff --git a/packages/client/src/pages/admin/object-storage.vue b/packages/client/src/pages/admin/object-storage.vue
index 8984686b5e..0f74865b10 100644
--- a/packages/client/src/pages/admin/object-storage.vue
+++ b/packages/client/src/pages/admin/object-storage.vue
@@ -1,76 +1,78 @@
 <template>
-<FormBase>
+<MkSpacer :content-max="700" :margin-min="16" :margin-max="32">
 	<FormSuspense :p="init">
-		<FormSwitch v-model="useObjectStorage">{{ $ts.useObjectStorage }}</FormSwitch>
+		<div class="_formRoot">
+			<FormSwitch v-model="useObjectStorage" class="_formBlock">{{ $ts.useObjectStorage }}</FormSwitch>
 
-		<template v-if="useObjectStorage">
-			<FormInput v-model="objectStorageBaseUrl">
-				<span>{{ $ts.objectStorageBaseUrl }}</span>
-				<template #desc>{{ $ts.objectStorageBaseUrlDesc }}</template>
-			</FormInput>
+			<template v-if="useObjectStorage">
+				<FormInput v-model="objectStorageBaseUrl" class="_formBlock">
+					<template #label>{{ $ts.objectStorageBaseUrl }}</template>
+					<template #caption>{{ $ts.objectStorageBaseUrlDesc }}</template>
+				</FormInput>
 
-			<FormInput v-model="objectStorageBucket">
-				<span>{{ $ts.objectStorageBucket }}</span>
-				<template #desc>{{ $ts.objectStorageBucketDesc }}</template>
-			</FormInput>
+				<FormInput v-model="objectStorageBucket" class="_formBlock">
+					<template #label>{{ $ts.objectStorageBucket }}</template>
+					<template #caption>{{ $ts.objectStorageBucketDesc }}</template>
+				</FormInput>
 
-			<FormInput v-model="objectStoragePrefix">
-				<span>{{ $ts.objectStoragePrefix }}</span>
-				<template #desc>{{ $ts.objectStoragePrefixDesc }}</template>
-			</FormInput>
+				<FormInput v-model="objectStoragePrefix" class="_formBlock">
+					<template #label>{{ $ts.objectStoragePrefix }}</template>
+					<template #caption>{{ $ts.objectStoragePrefixDesc }}</template>
+				</FormInput>
 
-			<FormInput v-model="objectStorageEndpoint">
-				<span>{{ $ts.objectStorageEndpoint }}</span>
-				<template #desc>{{ $ts.objectStorageEndpointDesc }}</template>
-			</FormInput>
+				<FormInput v-model="objectStorageEndpoint" class="_formBlock">
+					<template #label>{{ $ts.objectStorageEndpoint }}</template>
+					<template #caption>{{ $ts.objectStorageEndpointDesc }}</template>
+				</FormInput>
 
-			<FormInput v-model="objectStorageRegion">
-				<span>{{ $ts.objectStorageRegion }}</span>
-				<template #desc>{{ $ts.objectStorageRegionDesc }}</template>
-			</FormInput>
+				<FormInput v-model="objectStorageRegion" class="_formBlock">
+					<template #label>{{ $ts.objectStorageRegion }}</template>
+					<template #caption>{{ $ts.objectStorageRegionDesc }}</template>
+				</FormInput>
 
-			<FormInput v-model="objectStorageAccessKey">
-				<template #prefix><i class="fas fa-key"></i></template>
-				<span>Access key</span>
-			</FormInput>
+				<FormSplit :min-width="280">
+					<FormInput v-model="objectStorageAccessKey" class="_formBlock">
+						<template #prefix><i class="fas fa-key"></i></template>
+						<template #label>Access key</template>
+					</FormInput>
 
-			<FormInput v-model="objectStorageSecretKey">
-				<template #prefix><i class="fas fa-key"></i></template>
-				<span>Secret key</span>
-			</FormInput>
+					<FormInput v-model="objectStorageSecretKey" class="_formBlock">
+						<template #prefix><i class="fas fa-key"></i></template>
+						<template #label>Secret key</template>
+					</FormInput>
+				</FormSplit>
 
-			<FormSwitch v-model="objectStorageUseSSL">
-				{{ $ts.objectStorageUseSSL }}
-				<template #desc>{{ $ts.objectStorageUseSSLDesc }}</template>
-			</FormSwitch>
+				<FormSwitch v-model="objectStorageUseSSL" class="_formBlock">
+					<template #label>{{ $ts.objectStorageUseSSL }}</template>
+					<template #caption>{{ $ts.objectStorageUseSSLDesc }}</template>
+				</FormSwitch>
 
-			<FormSwitch v-model="objectStorageUseProxy">
-				{{ $ts.objectStorageUseProxy }}
-				<template #desc>{{ $ts.objectStorageUseProxyDesc }}</template>
-			</FormSwitch>
+				<FormSwitch v-model="objectStorageUseProxy" class="_formBlock">
+					<template #label>{{ $ts.objectStorageUseProxy }}</template>
+					<template #caption>{{ $ts.objectStorageUseProxyDesc }}</template>
+				</FormSwitch>
 
-			<FormSwitch v-model="objectStorageSetPublicRead">
-				{{ $ts.objectStorageSetPublicRead }}
-			</FormSwitch>
+				<FormSwitch v-model="objectStorageSetPublicRead" class="_formBlock">
+					<template #label>{{ $ts.objectStorageSetPublicRead }}</template>
+				</FormSwitch>
 
-			<FormSwitch v-model="objectStorageS3ForcePathStyle">
-				s3ForcePathStyle
-			</FormSwitch>
-		</template>
-
-		<FormButton primary @click="save"><i class="fas fa-save"></i> {{ $ts.save }}</FormButton>
+				<FormSwitch v-model="objectStorageS3ForcePathStyle" class="_formBlock">
+					<template #label>s3ForcePathStyle</template>
+				</FormSwitch>
+			</template>
+		</div>
 	</FormSuspense>
-</FormBase>
+</MkSpacer>
 </template>
 
 <script lang="ts">
 import { defineComponent } from 'vue';
-import FormSwitch from '@/components/debobigego/switch.vue';
-import FormInput from '@/components/debobigego/input.vue';
-import FormButton from '@/components/debobigego/button.vue';
-import FormBase from '@/components/debobigego/base.vue';
-import FormGroup from '@/components/debobigego/group.vue';
-import FormSuspense from '@/components/debobigego/suspense.vue';
+import FormSwitch from '@/components/form/switch.vue';
+import FormInput from '@/components/form/input.vue';
+import FormGroup from '@/components/form/group.vue';
+import FormSuspense from '@/components/form/suspense.vue';
+import FormSplit from '@/components/form/split.vue';
+import FormSection from '@/components/form/section.vue';
 import * as os from '@/os';
 import * as symbols from '@/symbols';
 import { fetchInstance } from '@/instance';
@@ -79,10 +81,10 @@ export default defineComponent({
 	components: {
 		FormSwitch,
 		FormInput,
-		FormBase,
 		FormGroup,
-		FormButton,
 		FormSuspense,
+		FormSplit,
+		FormSection,
 	},
 
 	emits: ['info'],
@@ -93,6 +95,12 @@ export default defineComponent({
 				title: this.$ts.objectStorage,
 				icon: 'fas fa-cloud',
 				bg: 'var(--bg)',
+				actions: [{
+					asFullButton: true,
+					icon: 'fas fa-check',
+					text: this.$ts.save,
+					handler: this.save,
+				}],
 			},
 			useObjectStorage: false,
 			objectStorageBaseUrl: null,
diff --git a/packages/client/src/pages/admin/overview.vue b/packages/client/src/pages/admin/overview.vue
index da5fc0ba6d..59a4281599 100644
--- a/packages/client/src/pages/admin/overview.vue
+++ b/packages/client/src/pages/admin/overview.vue
@@ -81,6 +81,7 @@ import number from '@/filters/number';
 import MkInstanceInfo from './instance.vue';
 import XMetrics from './metrics.vue';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import * as symbols from '@/symbols';
 
 export default defineComponent({
@@ -113,7 +114,7 @@ export default defineComponent({
 			notesComparedToThePrevDay: null,
 			fetchJobs: () => os.api('admin/queue/deliver-delayed', {}),
 			fetchModLogs: () => os.api('admin/show-moderation-logs', {}),
-			queueStatsConnection: markRaw(os.stream.useChannel('queueStats')),
+			queueStatsConnection: markRaw(stream.useChannel('queueStats')),
 		}
 	},
 
diff --git a/packages/client/src/pages/admin/queue.vue b/packages/client/src/pages/admin/queue.vue
index 37a87089cb..49f3c63e82 100644
--- a/packages/client/src/pages/admin/queue.vue
+++ b/packages/client/src/pages/admin/queue.vue
@@ -17,6 +17,7 @@ import XQueue from './queue.chart.vue';
 import FormBase from '@/components/debobigego/base.vue';
 import FormButton from '@/components/debobigego/button.vue';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import * as symbols from '@/symbols';
 
 export default defineComponent({
@@ -36,7 +37,7 @@ export default defineComponent({
 				icon: 'fas fa-clipboard-list',
 				bg: 'var(--bg)',
 			},
-			connection: markRaw(os.stream.useChannel('queueStats')),
+			connection: markRaw(stream.useChannel('queueStats')),
 		}
 	},
 
diff --git a/packages/client/src/pages/admin/security.vue b/packages/client/src/pages/admin/security.vue
index adfb2e786c..91b10b68cc 100644
--- a/packages/client/src/pages/admin/security.vue
+++ b/packages/client/src/pages/admin/security.vue
@@ -1,31 +1,25 @@
 <template>
-<FormBase>
+<MkSpacer :content-max="700" :margin-min="16" :margin-max="32">
 	<FormSuspense :p="init">
-		<FormLink to="/admin/bot-protection">
-			<i class="fas fa-shield-alt"></i> {{ $ts.botProtection }}
-			<template v-if="enableHcaptcha" #suffix>hCaptcha</template>
-			<template v-else-if="enableRecaptcha" #suffix>reCAPTCHA</template>
-			<template v-else #suffix>{{ $ts.none }} ({{ $ts.notRecommended }})</template>
-		</FormLink>
-
-		<FormSwitch v-model="enableRegistration">{{ $ts.enableRegistration }}</FormSwitch>
-
-		<FormSwitch v-model="emailRequiredForSignup">{{ $ts.emailRequiredForSignup }}</FormSwitch>
-
-		<FormButton primary @click="save"><i class="fas fa-save"></i> {{ $ts.save }}</FormButton>
+		<div class="_formRoot">
+			<FormLink to="/admin/bot-protection" class="_formBlock">
+				<i class="fas fa-shield-alt"></i> {{ $ts.botProtection }}
+				<template v-if="enableHcaptcha" #suffix>hCaptcha</template>
+				<template v-else-if="enableRecaptcha" #suffix>reCAPTCHA</template>
+				<template v-else #suffix>{{ $ts.none }} ({{ $ts.notRecommended }})</template>
+			</FormLink>
+		</div>
 	</FormSuspense>
-</FormBase>
+</MkSpacer>
 </template>
 
 <script lang="ts">
 import { defineAsyncComponent, defineComponent } from 'vue';
-import FormLink from '@/components/debobigego/link.vue';
-import FormSwitch from '@/components/debobigego/switch.vue';
-import FormButton from '@/components/debobigego/button.vue';
-import FormBase from '@/components/debobigego/base.vue';
-import FormGroup from '@/components/debobigego/group.vue';
-import FormInfo from '@/components/debobigego/info.vue';
-import FormSuspense from '@/components/debobigego/suspense.vue';
+import FormLink from '@/components/form/link.vue';
+import FormSwitch from '@/components/form/switch.vue';
+import FormInfo from '@/components/ui/info.vue';
+import FormSuspense from '@/components/form/suspense.vue';
+import FormSection from '@/components/form/section.vue';
 import * as os from '@/os';
 import * as symbols from '@/symbols';
 import { fetchInstance } from '@/instance';
@@ -34,10 +28,8 @@ export default defineComponent({
 	components: {
 		FormLink,
 		FormSwitch,
-		FormBase,
-		FormGroup,
-		FormButton,
 		FormInfo,
+		FormSection,
 		FormSuspense,
 	},
 
@@ -52,8 +44,6 @@ export default defineComponent({
 			},
 			enableHcaptcha: false,
 			enableRecaptcha: false,
-			enableRegistration: false,
-			emailRequiredForSignup: false,
 		}
 	},
 
@@ -66,18 +56,7 @@ export default defineComponent({
 			const meta = await os.api('meta', { detail: true });
 			this.enableHcaptcha = meta.enableHcaptcha;
 			this.enableRecaptcha = meta.enableRecaptcha;
-			this.enableRegistration = !meta.disableRegistration;
-			this.emailRequiredForSignup = meta.emailRequiredForSignup;
 		},
-	
-		save() {
-			os.apiWithDialog('admin/update-meta', {
-				disableRegistration: !this.enableRegistration,
-				emailRequiredForSignup: this.emailRequiredForSignup,
-			}).then(() => {
-				fetchInstance();
-			});
-		}
 	}
 });
 </script>
diff --git a/packages/client/src/pages/admin/settings.vue b/packages/client/src/pages/admin/settings.vue
index d88445abdb..e20ce40c75 100644
--- a/packages/client/src/pages/admin/settings.vue
+++ b/packages/client/src/pages/admin/settings.vue
@@ -1,72 +1,113 @@
 <template>
-<FormBase>
+<MkSpacer :content-max="700" :margin-min="16" :margin-max="32">
 	<FormSuspense :p="init">
-		<FormInput v-model="name">
-			<span>{{ $ts.instanceName }}</span>
-		</FormInput>
+		<div class="_formRoot">
+			<FormInput v-model="name" class="_formBlock">
+				<template #label>{{ $ts.instanceName }}</template>
+			</FormInput>
 
-		<FormTextarea v-model="description">
-			<span>{{ $ts.instanceDescription }}</span>
-		</FormTextarea>
+			<FormTextarea v-model="description" class="_formBlock">
+				<template #label>{{ $ts.instanceDescription }}</template>
+			</FormTextarea>
 
-		<FormInput v-model="iconUrl">
-			<template #prefix><i class="fas fa-link"></i></template>
-			<span>{{ $ts.iconUrl }}</span>
-		</FormInput>
+			<FormInput v-model="iconUrl" class="_formBlock">
+				<template #prefix><i class="fas fa-link"></i></template>
+				<template #label>{{ $ts.iconUrl }}</template>
+			</FormInput>
 
-		<FormInput v-model="bannerUrl">
-			<template #prefix><i class="fas fa-link"></i></template>
-			<span>{{ $ts.bannerUrl }}</span>
-		</FormInput>
+			<FormInput v-model="bannerUrl" class="_formBlock">
+				<template #prefix><i class="fas fa-link"></i></template>
+				<template #label>{{ $ts.bannerUrl }}</template>
+			</FormInput>
 
-		<FormInput v-model="backgroundImageUrl">
-			<template #prefix><i class="fas fa-link"></i></template>
-			<span>{{ $ts.backgroundImageUrl }}</span>
-		</FormInput>
+			<FormInput v-model="backgroundImageUrl" class="_formBlock">
+				<template #prefix><i class="fas fa-link"></i></template>
+				<template #label>{{ $ts.backgroundImageUrl }}</template>
+			</FormInput>
 
-		<FormInput v-model="tosUrl">
-			<template #prefix><i class="fas fa-link"></i></template>
-			<span>{{ $ts.tosUrl }}</span>
-		</FormInput>
+			<FormInput v-model="tosUrl" class="_formBlock">
+				<template #prefix><i class="fas fa-link"></i></template>
+				<template #label>{{ $ts.tosUrl }}</template>
+			</FormInput>
 
-		<FormInput v-model="maintainerName">
-			<span>{{ $ts.maintainerName }}</span>
-		</FormInput>
+			<FormSplit :min-width="300">
+				<FormInput v-model="maintainerName" class="_formBlock">
+					<template #label>{{ $ts.maintainerName }}</template>
+				</FormInput>
 
-		<FormInput v-model="maintainerEmail" type="email">
-			<template #prefix><i class="fas fa-envelope"></i></template>
-			<span>{{ $ts.maintainerEmail }}</span>
-		</FormInput>
+				<FormInput v-model="maintainerEmail" type="email" class="_formBlock">
+					<template #prefix><i class="fas fa-envelope"></i></template>
+					<template #label>{{ $ts.maintainerEmail }}</template>
+				</FormInput>
+			</FormSplit>
 
-		<FormTextarea v-model="pinnedUsers">
-			<span>{{ $ts.pinnedUsers }}</span>
-			<template #desc>{{ $ts.pinnedUsersDescription }}</template>
-		</FormTextarea>
+			<FormTextarea v-model="pinnedUsers" class="_formBlock">
+				<template #label>{{ $ts.pinnedUsers }}</template>
+				<template #caption>{{ $ts.pinnedUsersDescription }}</template>
+			</FormTextarea>
 
-		<FormInput v-model="maxNoteTextLength" type="number">
-			<template #prefix><i class="fas fa-pencil-alt"></i></template>
-			<span>{{ $ts.maxNoteTextLength }}</span>
-		</FormInput>
+			<FormInput v-model="maxNoteTextLength" type="number" class="_formBlock">
+				<template #prefix><i class="fas fa-pencil-alt"></i></template>
+				<template #label>{{ $ts.maxNoteTextLength }}</template>
+			</FormInput>
 
-		<FormSwitch v-model="enableLocalTimeline">{{ $ts.enableLocalTimeline }}</FormSwitch>
-		<FormSwitch v-model="enableGlobalTimeline">{{ $ts.enableGlobalTimeline }}</FormSwitch>
-		<FormInfo>{{ $ts.disablingTimelinesInfo }}</FormInfo>
+			<FormSection>
+				<FormSwitch v-model="enableRegistration" class="_formBlock">
+					<template #label>{{ $ts.enableRegistration }}</template>
+				</FormSwitch>
 
-		<FormButton primary @click="save"><i class="fas fa-save"></i> {{ $ts.save }}</FormButton>
+				<FormSwitch v-model="emailRequiredForSignup" class="_formBlock">
+					<template #label>{{ $ts.emailRequiredForSignup }}</template>
+				</FormSwitch>
+			</FormSection>
+
+			<FormSection>
+				<FormSwitch v-model="enableLocalTimeline" class="_formBlock">{{ $ts.enableLocalTimeline }}</FormSwitch>
+				<FormSwitch v-model="enableGlobalTimeline" class="_formBlock">{{ $ts.enableGlobalTimeline }}</FormSwitch>
+				<FormInfo class="_formBlock">{{ $ts.disablingTimelinesInfo }}</FormInfo>
+			</FormSection>
+
+			<FormSection>
+				<template #label>{{ $ts.files }}</template>
+
+				<FormSwitch v-model="cacheRemoteFiles" class="_formBlock">
+					<template #label>{{ $ts.cacheRemoteFiles }}</template>
+					<template #caption>{{ $ts.cacheRemoteFilesDescription }}</template>
+				</FormSwitch>
+
+				<FormSwitch v-model="proxyRemoteFiles" class="_formBlock">
+					<template #label>{{ $ts.proxyRemoteFiles }}</template>
+					<template #caption>{{ $ts.proxyRemoteFilesDescription }}</template>
+				</FormSwitch>
+
+				<FormSplit :min-width="280">
+					<FormInput v-model="localDriveCapacityMb" type="number" class="_formBlock">
+						<template #label>{{ $ts.driveCapacityPerLocalAccount }}</template>
+						<template #suffix>MB</template>
+						<template #caption>{{ $ts.inMb }}</template>
+					</FormInput>
+
+					<FormInput v-model="remoteDriveCapacityMb" type="number" :disabled="!cacheRemoteFiles" class="_formBlock">
+						<template #label>{{ $ts.driveCapacityPerRemoteAccount }}</template>
+						<template #suffix>MB</template>
+						<template #caption>{{ $ts.inMb }}</template>
+					</FormInput>
+				</FormSplit>
+			</FormSection>
+		</div>
 	</FormSuspense>
-</FormBase>
+</MkSpacer>
 </template>
 
 <script lang="ts">
 import { defineComponent } from 'vue';
-import FormSwitch from '@/components/debobigego/switch.vue';
-import FormInput from '@/components/debobigego/input.vue';
-import FormButton from '@/components/debobigego/button.vue';
-import FormBase from '@/components/debobigego/base.vue';
-import FormGroup from '@/components/debobigego/group.vue';
-import FormTextarea from '@/components/debobigego/textarea.vue';
-import FormInfo from '@/components/debobigego/info.vue';
-import FormSuspense from '@/components/debobigego/suspense.vue';
+import FormSwitch from '@/components/form/switch.vue';
+import FormInput from '@/components/form/input.vue';
+import FormTextarea from '@/components/form/textarea.vue';
+import FormInfo from '@/components/ui/info.vue';
+import FormSection from '@/components/form/section.vue';
+import FormSplit from '@/components/form/split.vue';
+import FormSuspense from '@/components/form/suspense.vue';
 import * as os from '@/os';
 import * as symbols from '@/symbols';
 import { fetchInstance } from '@/instance';
@@ -75,12 +116,11 @@ export default defineComponent({
 	components: {
 		FormSwitch,
 		FormInput,
-		FormBase,
-		FormGroup,
-		FormButton,
+		FormSuspense,
 		FormTextarea,
 		FormInfo,
-		FormSuspense,
+		FormSection,
+		FormSplit,
 	},
 
 	emits: ['info'],
@@ -91,6 +131,12 @@ export default defineComponent({
 				title: this.$ts.general,
 				icon: 'fas fa-cog',
 				bg: 'var(--bg)',
+				actions: [{
+					asFullButton: true,
+					icon: 'fas fa-check',
+					text: this.$ts.save,
+					handler: this.save,
+				}],
 			},
 			name: null,
 			description: null,
@@ -104,6 +150,12 @@ export default defineComponent({
 			enableLocalTimeline: false,
 			enableGlobalTimeline: false,
 			pinnedUsers: '',
+			cacheRemoteFiles: false,
+			proxyRemoteFiles: false,
+			localDriveCapacityMb: 0,
+			remoteDriveCapacityMb: 0,
+			enableRegistration: false,
+			emailRequiredForSignup: false,
 		}
 	},
 
@@ -126,6 +178,12 @@ export default defineComponent({
 			this.enableLocalTimeline = !meta.disableLocalTimeline;
 			this.enableGlobalTimeline = !meta.disableGlobalTimeline;
 			this.pinnedUsers = meta.pinnedUsers.join('\n');
+			this.cacheRemoteFiles = meta.cacheRemoteFiles;
+			this.proxyRemoteFiles = meta.proxyRemoteFiles;
+			this.localDriveCapacityMb = meta.driveCapacityPerLocalUserMb;
+			this.remoteDriveCapacityMb = meta.driveCapacityPerRemoteUserMb;
+			this.enableRegistration = !meta.disableRegistration;
+			this.emailRequiredForSignup = meta.emailRequiredForSignup;
 		},
 
 		save() {
@@ -142,6 +200,12 @@ export default defineComponent({
 				disableLocalTimeline: !this.enableLocalTimeline,
 				disableGlobalTimeline: !this.enableGlobalTimeline,
 				pinnedUsers: this.pinnedUsers.split('\n'),
+				cacheRemoteFiles: this.cacheRemoteFiles,
+				proxyRemoteFiles: this.proxyRemoteFiles,
+				localDriveCapacityMb: parseInt(this.localDriveCapacityMb, 10),
+				remoteDriveCapacityMb: parseInt(this.remoteDriveCapacityMb, 10),
+				disableRegistration: !this.enableRegistration,
+				emailRequiredForSignup: this.emailRequiredForSignup,
 			}).then(() => {
 				fetchInstance();
 			});
diff --git a/packages/client/src/pages/federation.vue b/packages/client/src/pages/federation.vue
index 4e5f428ff9..a467c5eeb8 100644
--- a/packages/client/src/pages/federation.vue
+++ b/packages/client/src/pages/federation.vue
@@ -6,7 +6,7 @@
 				<template #prefix><i class="fas fa-search"></i></template>
 				<template #label>{{ $ts.host }}</template>
 			</MkInput>
-			<div class="_inputSplit" style="margin-top: var(--margin);">
+			<FormSplit style="margin-top: var(--margin);">
 				<MkSelect v-model="state">
 					<template #label>{{ $ts.state }}</template>
 					<option value="all">{{ $ts.all }}</option>
@@ -38,7 +38,7 @@
 					<option value="+driveFiles">{{ $ts.driveFilesCount }} ({{ $ts.descendingOrder }})</option>
 					<option value="-driveFiles">{{ $ts.driveFilesCount }} ({{ $ts.ascendingOrder }})</option>
 				</MkSelect>
-			</div>
+			</FormSplit>
 		</div>
 
 		<MkPagination v-slot="{items}" ref="instances" :key="host + state" :pagination="pagination">
@@ -101,6 +101,7 @@ import MkButton from '@/components/ui/button.vue';
 import MkInput from '@/components/form/input.vue';
 import MkSelect from '@/components/form/select.vue';
 import MkPagination from '@/components/ui/pagination.vue';
+import FormSplit from '@/components/form/split.vue';
 import * as os from '@/os';
 import * as symbols from '@/symbols';
 
@@ -110,6 +111,7 @@ export default defineComponent({
 		MkInput,
 		MkSelect,
 		MkPagination,
+		FormSplit,
 	},
 
 	emits: ['info'],
diff --git a/packages/client/src/pages/messaging/index.vue b/packages/client/src/pages/messaging/index.vue
index 01f9d4518f..554ebc4b6b 100644
--- a/packages/client/src/pages/messaging/index.vue
+++ b/packages/client/src/pages/messaging/index.vue
@@ -44,6 +44,7 @@ import * as Acct from 'misskey-js/built/acct';
 import MkButton from '@/components/ui/button.vue';
 import { acct } from '@/filters/user';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import * as symbols from '@/symbols';
 
 export default defineComponent({
@@ -66,7 +67,7 @@ export default defineComponent({
 	},
 
 	mounted() {
-		this.connection = markRaw(os.stream.useChannel('messagingIndex'));
+		this.connection = markRaw(stream.useChannel('messagingIndex'));
 
 		this.connection.on('message', this.onMessage);
 		this.connection.on('read', this.onRead);
diff --git a/packages/client/src/pages/messaging/messaging-room.form.vue b/packages/client/src/pages/messaging/messaging-room.form.vue
index 8d92c430f1..f2a90fbfba 100644
--- a/packages/client/src/pages/messaging/messaging-room.form.vue
+++ b/packages/client/src/pages/messaging/messaging-room.form.vue
@@ -28,6 +28,7 @@ import * as autosize from 'autosize';
 import { formatTimeString } from '@/scripts/format-time-string';
 import { selectFile } from '@/scripts/select-file';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import { Autocomplete } from '@/scripts/autocomplete';
 import { throttle } from 'throttle-debounce';
 
@@ -48,7 +49,7 @@ export default defineComponent({
 			file: null,
 			sending: false,
 			typing: throttle(3000, () => {
-				os.stream.send('typingOnMessaging', this.user ? { partner: this.user.id } : { group: this.group.id });
+				stream.send('typingOnMessaging', this.user ? { partner: this.user.id } : { group: this.group.id });
 			}),
 		};
 	},
diff --git a/packages/client/src/pages/messaging/messaging-room.vue b/packages/client/src/pages/messaging/messaging-room.vue
index ffc7f7bc0d..1bcee01d29 100644
--- a/packages/client/src/pages/messaging/messaging-room.vue
+++ b/packages/client/src/pages/messaging/messaging-room.vue
@@ -43,6 +43,7 @@ import XForm from './messaging-room.form.vue';
 import * as Acct from 'misskey-js/built/acct';
 import { isBottom, onScrollBottom, scroll } from '@/scripts/scroll';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import { popout } from '@/scripts/popout';
 import * as sound from '@/scripts/sound';
 import * as symbols from '@/symbols';
@@ -141,7 +142,7 @@ const Component = defineComponent({
 				this.group = group;
 			}
 
-			this.connection = markRaw(os.stream.useChannel('messaging', {
+			this.connection = markRaw(stream.useChannel('messaging', {
 				otherparty: this.user ? this.user.id : undefined,
 				group: this.group ? this.group.id : undefined,
 			}));
diff --git a/packages/client/src/pages/reversi/game.vue b/packages/client/src/pages/reversi/game.vue
index b1ed632904..697d2898b9 100644
--- a/packages/client/src/pages/reversi/game.vue
+++ b/packages/client/src/pages/reversi/game.vue
@@ -9,6 +9,7 @@ import { defineComponent, markRaw } from 'vue';
 import GameSetting from './game.setting.vue';
 import GameBoard from './game.board.vue';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import * as symbols from '@/symbols';
 
 export default defineComponent({
@@ -61,7 +62,7 @@ export default defineComponent({
 				if (this.connection) {
 					this.connection.dispose();
 				}
-				this.connection = markRaw(os.stream.useChannel('gamesReversiGame', {
+				this.connection = markRaw(stream.useChannel('gamesReversiGame', {
 					gameId: this.game.id
 				}));
 				this.connection.on('started', this.onStarted);
diff --git a/packages/client/src/pages/reversi/index.vue b/packages/client/src/pages/reversi/index.vue
index 0b118531fc..93c22c02f3 100644
--- a/packages/client/src/pages/reversi/index.vue
+++ b/packages/client/src/pages/reversi/index.vue
@@ -62,6 +62,7 @@
 <script lang="ts">
 import { defineComponent, markRaw } from 'vue';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import MkButton from '@/components/ui/button.vue';
 import MkFolder from '@/components/ui/folder.vue';
 import * as symbols from '@/symbols';
@@ -92,7 +93,7 @@ export default defineComponent({
 
 	mounted() {
 		if (this.$i) {
-			this.connection = markRaw(os.stream.useChannel('gamesReversi'));
+			this.connection = markRaw(stream.useChannel('gamesReversi'));
 
 			this.connection.on('invited', this.onInvited);
 
diff --git a/packages/client/src/pages/settings/drive.vue b/packages/client/src/pages/settings/drive.vue
index 9ab99c6efe..c123159b61 100644
--- a/packages/client/src/pages/settings/drive.vue
+++ b/packages/client/src/pages/settings/drive.vue
@@ -5,7 +5,7 @@
 		<div class="_formBlock uawsfosz">
 			<div class="meter"><div :style="meterStyle"></div></div>
 		</div>
-		<div class="_inputSplit _formBlock">
+		<FormSplit>
 			<MkKeyValue class="_formBlock">
 				<template #key>{{ $ts.capacity }}</template>
 				<template #value>{{ bytes(capacity, 1) }}</template>
@@ -14,7 +14,7 @@
 				<template #key>{{ $ts.inUse }}</template>
 				<template #value>{{ bytes(usage, 1) }}</template>
 			</MkKeyValue>
-		</div>
+		</FormSplit>
 	</FormSection>
 
 	<FormSection>
@@ -38,6 +38,7 @@ import * as tinycolor from 'tinycolor2';
 import FormLink from '@/components/form/link.vue';
 import FormSection from '@/components/form/section.vue';
 import MkKeyValue from '@/components/key-value.vue';
+import FormSplit from '@/components/form/split.vue';
 import * as os from '@/os';
 import bytes from '@/filters/bytes';
 import * as symbols from '@/symbols';
@@ -49,6 +50,7 @@ export default defineComponent({
 		FormLink,
 		FormSection,
 		MkKeyValue,
+		FormSplit,
 	},
 
 	emits: ['info'],
diff --git a/packages/client/src/pages/settings/menu.vue b/packages/client/src/pages/settings/menu.vue
index 19d26be89a..26404f3adf 100644
--- a/packages/client/src/pages/settings/menu.vue
+++ b/packages/client/src/pages/settings/menu.vue
@@ -21,7 +21,6 @@
 import { defineComponent } from 'vue';
 import FormTextarea from '@/components/form/textarea.vue';
 import FormRadios from '@/components/form/radios.vue';
-import FormBase from '@/components/debobigego/base.vue';
 import FormButton from '@/components/ui/button.vue';
 import * as os from '@/os';
 import { menuDef } from '@/menu';
@@ -31,7 +30,6 @@ import { unisonReload } from '@/scripts/unison-reload';
 
 export default defineComponent({
 	components: {
-		FormBase,
 		FormButton,
 		FormTextarea,
 		FormRadios,
diff --git a/packages/client/src/pages/settings/notifications.vue b/packages/client/src/pages/settings/notifications.vue
index d3ada0d7ef..ab26d7d558 100644
--- a/packages/client/src/pages/settings/notifications.vue
+++ b/packages/client/src/pages/settings/notifications.vue
@@ -13,7 +13,6 @@
 import { defineComponent } from 'vue';
 import FormButton from '@/components/ui/button.vue';
 import FormLink from '@/components/form/link.vue';
-import FormBase from '@/components/debobigego/base.vue';
 import FormSection from '@/components/form/section.vue';
 import { notificationTypes } from 'misskey-js';
 import * as os from '@/os';
@@ -21,7 +20,6 @@ import * as symbols from '@/symbols';
 
 export default defineComponent({
 	components: {
-		FormBase,
 		FormLink,
 		FormButton,
 		FormSection,
diff --git a/packages/client/src/pizzax.ts b/packages/client/src/pizzax.ts
index 396abc2418..dbbbfc228a 100644
--- a/packages/client/src/pizzax.ts
+++ b/packages/client/src/pizzax.ts
@@ -1,6 +1,7 @@
 import { onUnmounted, Ref, ref, watch } from 'vue';
 import { $i } from './account';
 import { api } from './os';
+import { stream } from './stream';
 
 type StateDef = Record<string, {
 	where: 'account' | 'device' | 'deviceAccount';
@@ -9,6 +10,8 @@ type StateDef = Record<string, {
 
 type ArrayElement<A> = A extends readonly (infer T)[] ? T : never;
 
+const connection = $i && stream.useChannel('main');
+
 export class Storage<T extends StateDef> {
 	public readonly key: string;
 	public readonly keyForLocalStorage: string;
@@ -69,8 +72,19 @@ export class Storage<T extends StateDef> {
 					localStorage.setItem(this.keyForLocalStorage + '::cache::' + $i.id, JSON.stringify(cache));
 				});
 			}, 1);
+			// streamingのuser storage updateイベントを監視して更新
+			connection?.on('registryUpdated', ({ scope, key, value }: { scope: string[], key: keyof T, value: T[typeof key]['default'] }) => {
+				if (scope.length !== 2 || scope[0] !== 'client' || scope[1] !== this.key || this.state[key] === value) return;
 
-			// TODO: streamingのuser storage updateイベントを監視して更新
+				this.state[key] = value;
+				this.reactiveState[key].value = value;
+
+				const cache = JSON.parse(localStorage.getItem(this.keyForLocalStorage + '::cache::' + $i.id) || '{}');
+				if (cache[key] !== value) {
+					cache[key] = value;
+					localStorage.setItem(this.keyForLocalStorage + '::cache::' + $i.id, JSON.stringify(cache));
+				}
+			});
 		}
 	}
 
diff --git a/packages/client/src/scripts/select-file.ts b/packages/client/src/scripts/select-file.ts
index 6019890444..6bb3f8bf8a 100644
--- a/packages/client/src/scripts/select-file.ts
+++ b/packages/client/src/scripts/select-file.ts
@@ -1,4 +1,5 @@
 import * as os from '@/os';
+import { stream } from '@/stream';
 import { i18n } from '@/i18n';
 import { defaultStore } from '@/store';
 import { DriveFile } from 'misskey-js/built/entities';
@@ -48,7 +49,7 @@ function select(src: any, label: string | null, multiple: boolean): Promise<Driv
 
 				const marker = Math.random().toString(); // TODO: UUIDとか使う
 
-				const connection = os.stream.useChannel('main');
+				const connection = stream.useChannel('main');
 				connection.on('urlUploadFinished', data => {
 					if (data.marker === marker) {
 						res(multiple ? [data.file] : data.file);
diff --git a/packages/client/src/stream.ts b/packages/client/src/stream.ts
new file mode 100644
index 0000000000..10502444b6
--- /dev/null
+++ b/packages/client/src/stream.ts
@@ -0,0 +1,6 @@
+import * as Misskey from 'misskey-js';
+import { markRaw } from 'vue';
+import { $i } from '@/account';
+import { url } from '@/config';
+
+export const stream = markRaw(new Misskey.Stream(url, $i));
diff --git a/packages/client/src/style.scss b/packages/client/src/style.scss
index 181521b4f5..b95a5c3950 100644
--- a/packages/client/src/style.scss
+++ b/packages/client/src/style.scss
@@ -386,16 +386,6 @@ hr {
 	backdrop-filter: var(--blur, blur(15px));
 }
 
-._inputSplit {
-	display: grid;
-	grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
-	grid-gap: 12px;
-
-	> * {
-		margin: 0 !important;
-	}
-}
-
 ._formBlock {
 	margin: 1.5em 0;
 }
diff --git a/packages/client/src/ui/_common_/common.vue b/packages/client/src/ui/_common_/common.vue
index 963d2bc376..6990db49bc 100644
--- a/packages/client/src/ui/_common_/common.vue
+++ b/packages/client/src/ui/_common_/common.vue
@@ -15,10 +15,11 @@
 
 <script lang="ts">
 import { defineAsyncComponent, defineComponent } from 'vue';
-import { stream, popup, popups, uploads, pendingApiRequestsCount } from '@/os';
+import { popup, popups, uploads, pendingApiRequestsCount } from '@/os';
 import * as sound from '@/scripts/sound';
 import { $i } from '@/account';
 import { swInject } from './sw-inject';
+import { stream } from '@/stream';
 
 export default defineComponent({
 	components: {
diff --git a/packages/client/src/ui/_common_/stream-indicator.vue b/packages/client/src/ui/_common_/stream-indicator.vue
index 3f86f94549..c75c6d1c0a 100644
--- a/packages/client/src/ui/_common_/stream-indicator.vue
+++ b/packages/client/src/ui/_common_/stream-indicator.vue
@@ -11,6 +11,7 @@
 <script lang="ts">
 import { defineComponent } from 'vue';
 import * as os from '@/os';
+import { stream } from '@/stream';
 
 export default defineComponent({
 	data() {
@@ -20,14 +21,14 @@ export default defineComponent({
 	},
 	computed: {
 		stream() {
-			return os.stream;
+			return stream;
 		},
 	},
 	created() {
-		os.stream.on('_disconnected_', this.onDisconnected);
+		stream.on('_disconnected_', this.onDisconnected);
 	},
 	beforeUnmount() {
-		os.stream.off('_disconnected_', this.onDisconnected);
+		stream.off('_disconnected_', this.onDisconnected);
 	},
 	methods: {
 		onDisconnected() {
diff --git a/packages/client/src/ui/chat/note.vue b/packages/client/src/ui/chat/note.vue
index 6927dd0eaf..fa5faa4ec3 100644
--- a/packages/client/src/ui/chat/note.vue
+++ b/packages/client/src/ui/chat/note.vue
@@ -118,6 +118,7 @@ import copyToClipboard from '@/scripts/copy-to-clipboard';
 import { checkWordMute } from '@/scripts/check-word-mute';
 import { userPage } from '@/filters/user';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import { noteActions, noteViewInterruptors } from '@/store';
 import { reactionPicker } from '@/scripts/reaction-picker';
 import { extractUrlFromMfm } from '@/scripts/extract-url-from-mfm';
@@ -243,7 +244,7 @@ export default defineComponent({
 
 	async created() {
 		if (this.$i) {
-			this.connection = os.stream;
+			this.connection = stream;
 		}
 
 		this.collapsed = this.appearNote.cw == null && this.appearNote.text && (
diff --git a/packages/client/src/ui/chat/pages/channel.vue b/packages/client/src/ui/chat/pages/channel.vue
index 13c735cd47..2755cc92b7 100644
--- a/packages/client/src/ui/chat/pages/channel.vue
+++ b/packages/client/src/ui/chat/pages/channel.vue
@@ -26,6 +26,7 @@ import { computed, defineComponent, markRaw } from 'vue';
 import * as Misskey from 'misskey-js';
 import XNotes from '../notes.vue';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import * as sound from '@/scripts/sound';
 import { scrollToBottom, getScrollPosition, getScrollContainer } from '@/scripts/scroll';
 import follow from '@/directives/follow-append';
@@ -106,7 +107,7 @@ export default defineComponent({
 			sound.play(note.userId === this.$i.id ? 'noteMy' : 'note');
 		};
 
-		this.connection = markRaw(os.stream.useChannel('channel', {
+		this.connection = markRaw(stream.useChannel('channel', {
 			channelId: this.channelId
 		}));
 		this.connection.on('note', prepend);
diff --git a/packages/client/src/ui/chat/pages/timeline.vue b/packages/client/src/ui/chat/pages/timeline.vue
index 07e847ad73..f67d333398 100644
--- a/packages/client/src/ui/chat/pages/timeline.vue
+++ b/packages/client/src/ui/chat/pages/timeline.vue
@@ -17,6 +17,7 @@
 import { computed, defineComponent, markRaw } from 'vue';
 import XNotes from '../notes.vue';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import * as sound from '@/scripts/sound';
 import { scrollToBottom, getScrollPosition, getScrollContainer } from '@/scripts/scroll';
 import follow from '@/directives/follow-append';
@@ -90,23 +91,23 @@ export default defineComponent({
 
 		if (this.src == 'home') {
 			endpoint = 'notes/timeline';
-			this.connection = markRaw(os.stream.useChannel('homeTimeline'));
+			this.connection = markRaw(stream.useChannel('homeTimeline'));
 			this.connection.on('note', prepend);
 
-			this.connection2 = markRaw(os.stream.useChannel('main'));
+			this.connection2 = markRaw(stream.useChannel('main'));
 			this.connection2.on('follow', onChangeFollowing);
 			this.connection2.on('unfollow', onChangeFollowing);
 		} else if (this.src == 'local') {
 			endpoint = 'notes/local-timeline';
-			this.connection = markRaw(os.stream.useChannel('localTimeline'));
+			this.connection = markRaw(stream.useChannel('localTimeline'));
 			this.connection.on('note', prepend);
 		} else if (this.src == 'social') {
 			endpoint = 'notes/hybrid-timeline';
-			this.connection = markRaw(os.stream.useChannel('hybridTimeline'));
+			this.connection = markRaw(stream.useChannel('hybridTimeline'));
 			this.connection.on('note', prepend);
 		} else if (this.src == 'global') {
 			endpoint = 'notes/global-timeline';
-			this.connection = markRaw(os.stream.useChannel('globalTimeline'));
+			this.connection = markRaw(stream.useChannel('globalTimeline'));
 			this.connection.on('note', prepend);
 		}
 
diff --git a/packages/client/src/ui/chat/post-form.vue b/packages/client/src/ui/chat/post-form.vue
index 8c572e3b1c..0f04096653 100644
--- a/packages/client/src/ui/chat/post-form.vue
+++ b/packages/client/src/ui/chat/post-form.vue
@@ -59,6 +59,7 @@ import * as Acct from 'misskey-js/built/acct';
 import { formatTimeString } from '@/scripts/format-time-string';
 import { Autocomplete } from '@/scripts/autocomplete';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import { selectFiles } from '@/scripts/select-file';
 import { notePostInterruptors, postFormActions } from '@/store';
 import { throttle } from 'throttle-debounce';
@@ -130,7 +131,7 @@ export default defineComponent({
 			imeText: '',
 			typing: throttle(3000, () => {
 				if (this.channel) {
-					os.stream.send('typingOnChannel', { channel: this.channel });
+					stream.send('typingOnChannel', { channel: this.channel });
 				}
 			}),
 			postFormActions,
diff --git a/packages/client/src/widgets/job-queue.vue b/packages/client/src/widgets/job-queue.vue
index ef440881e5..1b7c71de67 100644
--- a/packages/client/src/widgets/job-queue.vue
+++ b/packages/client/src/widgets/job-queue.vue
@@ -49,6 +49,7 @@
 import { defineComponent, markRaw } from 'vue';
 import define from './define';
 import * as os from '@/os';
+import { stream } from '@/stream';
 import number from '@/filters/number';
 import * as sound from '@/scripts/sound';
 
@@ -70,7 +71,7 @@ export default defineComponent({
 	extends: widget,
 	data() {
 		return {
-			connection: markRaw(os.stream.useChannel('queueStats')),
+			connection: markRaw(stream.useChannel('queueStats')),
 			inbox: {
 				activeSincePrevTick: 0,
 				active: 0,
diff --git a/packages/client/src/widgets/photos.vue b/packages/client/src/widgets/photos.vue
index a91d4f6c49..7a0b54027b 100644
--- a/packages/client/src/widgets/photos.vue
+++ b/packages/client/src/widgets/photos.vue
@@ -20,6 +20,7 @@ import MkContainer from '@/components/ui/container.vue';
 import define from './define';
 import { getStaticImageUrl } from '@/scripts/get-static-image-url';
 import * as os from '@/os';
+import { stream } from '@/stream';
 
 const widget = define({
 	name: 'photos',
@@ -48,7 +49,7 @@ export default defineComponent({
 		};
 	},
 	mounted() {
-		this.connection = markRaw(os.stream.useChannel('main'));
+		this.connection = markRaw(stream.useChannel('main'));
 
 		this.connection.on('driveFileCreated', this.onDriveFileCreated);
 
diff --git a/packages/client/src/widgets/server-metric/index.vue b/packages/client/src/widgets/server-metric/index.vue
index 019e16fb33..107b750906 100644
--- a/packages/client/src/widgets/server-metric/index.vue
+++ b/packages/client/src/widgets/server-metric/index.vue
@@ -23,6 +23,7 @@ import XCpu from './cpu.vue';
 import XMemory from './mem.vue';
 import XDisk from './disk.vue';
 import * as os from '@/os';
+import { stream } from '@/stream';
 
 const widget = define({
 	name: 'serverMetric',
@@ -63,7 +64,7 @@ export default defineComponent({
 		os.api('server-info', {}).then(res => {
 			this.meta = res;
 		});
-		this.connection = markRaw(os.stream.useChannel('serverStats'));
+		this.connection = markRaw(stream.useChannel('serverStats'));
 	},
 	unmounted() {
 		this.connection.dispose();
diff --git a/packages/client/webpack.config.js b/packages/client/webpack.config.js
index 8333b30803..adb5fb81b5 100644
--- a/packages/client/webpack.config.js
+++ b/packages/client/webpack.config.js
@@ -46,6 +46,7 @@ module.exports = {
 				loader: 'vue-loader',
 				options: {
 					cssSourceMap: false,
+					reactivityTransform: true,
 					compilerOptions: {
 						preserveWhitespace: false
 					}
diff --git a/packages/client/yarn.lock b/packages/client/yarn.lock
index 4f666c252b..10607feb27 100644
--- a/packages/client/yarn.lock
+++ b/packages/client/yarn.lock
@@ -6162,10 +6162,10 @@ vue-eslint-parser@^8.0.1:
     lodash "^4.17.21"
     semver "^7.3.5"
 
-vue-loader@16.8.3:
-  version "16.8.3"
-  resolved "https://registry.yarnpkg.com/vue-loader/-/vue-loader-16.8.3.tgz#d43e675def5ba9345d6c7f05914c13d861997087"
-  integrity sha512-7vKN45IxsKxe5GcVCbc2qFU5aWzyiLrYJyUuMz4BQLKctCj/fmCa0w6fGiiQ2cLFetNcek1ppGJQDCup0c1hpA==
+vue-loader@17.0.0:
+  version "17.0.0"
+  resolved "https://registry.yarnpkg.com/vue-loader/-/vue-loader-17.0.0.tgz#2eaa80aab125b19f00faa794b5bd867b17f85acb"
+  integrity sha512-OWSXjrzIvbF2LtOUmxT3HYgwwubbfFelN8PAP9R9dwpIkj48TVioHhWWSx7W7fk+iF5cgg3CBJRxwTdtLU4Ecg==
   dependencies:
     chalk "^4.1.0"
     hash-sum "^2.0.0"