diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62a2210279..fb6d76bb9e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,8 +9,10 @@ v2025.12.0で行われた「configの`trustProxy`のデフォルト値を`false`
 - 依存関係の更新
 
 ### Client
+- Enhance: デッキのUI説明を追加
 - Fix: バージョン表記のないPlayが正しく動作しない問題を修正  
   バージョン表記のないものは v0.x 系として実行されます。v1.x 系で動作させたい場合は必ずバージョン表記を含めてください。
+- Fix: デッキUIでメニュー位置を下にしているとプロファイル削除ボタンが表示されないのを修正  
 - Enhance: センシティブチャンネルの投稿が多くの場所で畳まれるようになりました
 
 
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 7ec1a87b1e..bf885ef974 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -2893,6 +2893,15 @@ _deck:
   usedAsMinWidthWhenFlexible: "「幅を自動調整」が有効の場合、これが幅の最小値となります"
   flexible: "幅を自動調整"
   enableSyncBetweenDevicesForProfiles: "プロファイル情報のデバイス間同期を有効にする"
+  showHowToUse: "UIの説明を見る"
+
+  _howToUse:
+    addColumn_title: "カラム追加"
+    addColumn_description: "カラムの種類を選んで追加できます。"
+    settings_title: "UI設定"
+    settings_description: "デッキUIの詳細設定を行えます。"
+    switchProfile_title: "プロファイル切り替え"
+    switchProfile_description: "UIのレイアウトをプロファイルとして保存し、いつでも切り替えられるようにできます。"
 
   _columns:
     main: "メイン"
diff --git a/package.json b/package.json
index 337a4223a2..42377ca622 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "misskey",
-	"version": "2025.12.2-beta.1",
+	"version": "2025.12.2-beta.2",
 	"codename": "nasubi",
 	"repository": {
 		"type": "git",
diff --git a/packages/backend/src/core/AiService.ts b/packages/backend/src/core/AiService.ts
index 7a005400bb..cbae280030 100644
--- a/packages/backend/src/core/AiService.ts
+++ b/packages/backend/src/core/AiService.ts
@@ -7,7 +7,6 @@ import * as fs from 'node:fs';
 import { fileURLToPath } from 'node:url';
 import { dirname } from 'node:path';
 import { Injectable } from '@nestjs/common';
-import si from 'systeminformation';
 import { Mutex } from 'async-mutex';
 import fetch from 'node-fetch';
 import { bindThis } from '@/decorators.js';
@@ -84,6 +83,7 @@ export class AiService {
 
 	@bindThis
 	private async getCpuFlags(): Promise<string[]> {
+		const si = await import('systeminformation');
 		const str = await si.cpuFlags();
 		return str.split(/\s+/);
 	}
diff --git a/packages/backend/src/daemons/ServerStatsService.ts b/packages/backend/src/daemons/ServerStatsService.ts
index d229efb123..a972e5861c 100644
--- a/packages/backend/src/daemons/ServerStatsService.ts
+++ b/packages/backend/src/daemons/ServerStatsService.ts
@@ -4,13 +4,12 @@
  */
 
 import { Inject, Injectable } from '@nestjs/common';
-import si from 'systeminformation';
 import Xev from 'xev';
 import * as osUtils from 'os-utils';
 import { bindThis } from '@/decorators.js';
-import type { OnApplicationShutdown } from '@nestjs/common';
 import { MiMeta } from '@/models/_.js';
 import { DI } from '@/di-symbols.js';
+import type { OnApplicationShutdown } from '@nestjs/common';
 
 const ev = new Xev();
 
@@ -97,12 +96,14 @@ function cpuUsage(): Promise<number> {
 
 // MEMORY STAT
 async function mem() {
+	const si = await import('systeminformation');
 	const data = await si.mem();
 	return data;
 }
 
 // NETWORK STAT
 async function net() {
+	const si = await import('systeminformation');
 	const iface = await si.networkInterfaceDefault();
 	const data = await si.networkStats(iface);
 	return data[0];
@@ -110,5 +111,6 @@ async function net() {
 
 // FS STAT
 async function fs() {
+	const si = await import('systeminformation');
 	return await si.disksIO().catch(() => ({ rIO_sec: 0, wIO_sec: 0 }));
 }
diff --git a/packages/backend/src/misc/show-machine-info.ts b/packages/backend/src/misc/show-machine-info.ts
index 8ddec35f23..b279eb9546 100644
--- a/packages/backend/src/misc/show-machine-info.ts
+++ b/packages/backend/src/misc/show-machine-info.ts
@@ -4,15 +4,11 @@
  */
 
 import * as os from 'node:os';
-import sysUtils from 'systeminformation';
 import type Logger from '@/logger.js';
 
 export async function showMachineInfo(parentLogger: Logger) {
 	const logger = parentLogger.createSubLogger('machine');
 	logger.debug(`Hostname: ${os.hostname()}`);
 	logger.debug(`Platform: ${process.platform} Arch: ${process.arch}`);
-	const mem = await sysUtils.mem();
-	const totalmem = (mem.total / 1024 / 1024 / 1024).toFixed(1);
-	const availmem = (mem.available / 1024 / 1024 / 1024).toFixed(1);
-	logger.debug(`CPU: ${os.cpus().length} core MEM: ${totalmem}GB (available: ${availmem}GB)`);
+	logger.debug(`CPU: ${os.cpus().length} core MEM: ${(os.totalmem() / 1024 / 1024 / 1024).toFixed(1)}GB (available: ${(os.freemem() / 1024 / 1024 / 1024).toFixed(1)}GB)`);
 }
diff --git a/packages/backend/src/server/api/endpoints/admin/server-info.ts b/packages/backend/src/server/api/endpoints/admin/server-info.ts
index 80b6a4d32e..603be514c8 100644
--- a/packages/backend/src/server/api/endpoints/admin/server-info.ts
+++ b/packages/backend/src/server/api/endpoints/admin/server-info.ts
@@ -4,7 +4,6 @@
  */
 
 import * as os from 'node:os';
-import si from 'systeminformation';
 import { Inject, Injectable } from '@nestjs/common';
 import { DataSource } from 'typeorm';
 import * as Redis from 'ioredis';
@@ -112,6 +111,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 	) {
 		super(meta, paramDef, async () => {
+			const si = await import('systeminformation');
+
 			const memStats = await si.mem();
 			const fsStats = await si.fsSize();
 			const netInterface = await si.networkInterfaceDefault();
diff --git a/packages/backend/src/server/api/endpoints/server-info.ts b/packages/backend/src/server/api/endpoints/server-info.ts
index 8301c85f2e..0e8dc73ad9 100644
--- a/packages/backend/src/server/api/endpoints/server-info.ts
+++ b/packages/backend/src/server/api/endpoints/server-info.ts
@@ -4,7 +4,6 @@
  */
 
 import * as os from 'node:os';
-import si from 'systeminformation';
 import { Inject, Injectable } from '@nestjs/common';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { MiMeta } from '@/models/_.js';
@@ -93,6 +92,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				},
 			};
 
+			const si = await import('systeminformation');
+
 			const memStats = await si.mem();
 			const fsStats = await si.fsSize();
 
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index 86557b12df..b3bcfcc137 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -5,7 +5,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <template>
 <div
-	:class="[$style.root, { [$style.modal]: modal, _popup: modal }]"
+	:class="[$style.root]"
 	@dragover.stop="onDragover"
 	@dragenter="onDragenter"
 	@dragleave="onDragleave"
@@ -114,7 +114,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { inject, watch, nextTick, onMounted, defineAsyncComponent, provide, shallowRef, ref, computed, useTemplateRef, onUnmounted } from 'vue';
+import { watch, nextTick, onMounted, defineAsyncComponent, provide, shallowRef, ref, computed, useTemplateRef, onUnmounted } from 'vue';
 import * as mfm from 'mfm-js';
 import * as Misskey from 'misskey-js';
 import insertTextAtCursor from 'insert-text-at-cursor';
@@ -161,8 +161,6 @@ import { closeTip } from '@/tips.js';
 
 const $i = ensureSignin();
 
-const modal = inject(DI.inModal, false);
-
 const props = withDefaults(defineProps<PostFormProps & {
 	fixed?: boolean;
 	autofocus?: boolean;
@@ -1447,13 +1445,6 @@ defineExpose({
 .root {
 	position: relative;
 	container-type: inline-size;
-
-	&.modal {
-		width: 100%;
-		max-width: 520px;
-		overflow-x: clip;
-		overflow-y: auto;
-	}
 }
 
 //#region header
@@ -1722,7 +1713,8 @@ html[data-color-scheme=light] .preview {
 	min-width: 100%;
 	width: 100%;
 	min-height: 90px;
-	height: 100%;
+	max-height: 500px;
+	field-sizing: content;
 }
 
 .textCount {
diff --git a/packages/frontend/src/components/MkPostFormDialog.vue b/packages/frontend/src/components/MkPostFormDialog.vue
index ba8d3a7210..a7cf8a37cf 100644
--- a/packages/frontend/src/components/MkPostFormDialog.vue
+++ b/packages/frontend/src/components/MkPostFormDialog.vue
@@ -14,6 +14,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<MkPostForm
 		ref="form"
 		:class="$style.form"
+		class="_popup"
 		v-bind="props"
 		autofocus
 		freezeAfterPosted
@@ -73,7 +74,8 @@ function onModalClosed() {
 
 <style lang="scss" module>
 .form {
-	max-height: 100%;
+	width: 100%;
+	max-width: 520px;
 	margin: 0 auto auto auto;
 }
 </style>
diff --git a/packages/frontend/src/pages/admin/performance.vue b/packages/frontend/src/pages/admin/performance.vue
index c5f3c2d4f0..3ce8e05982 100644
--- a/packages/frontend/src/pages/admin/performance.vue
+++ b/packages/frontend/src/pages/admin/performance.vue
@@ -122,7 +122,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<SearchMarker>
 					<MkFolder :defaultOpen="true">
 						<template #icon><SearchIcon><i class="ti ti-bolt"></i></SearchIcon></template>
-						<template #label><SearchLabel>Misskey® Reactions Boost Technology™ (RBT)</SearchLabel><span class="_beta">{{ i18n.ts.beta }}</span></template>
+						<template #label><SearchLabel>Misskey® Reactions Boost Technology™ (RBT)</SearchLabel></template>
 						<template v-if="rbtForm.savedState.enableReactionsBuffering" #suffix>Enabled</template>
 						<template v-else #suffix>Disabled</template>
 						<template v-if="rbtForm.modified.value" #footer>
diff --git a/packages/frontend/src/pages/settings/privacy.vue b/packages/frontend/src/pages/settings/privacy.vue
index c2e0b3fe41..edc71e5156 100644
--- a/packages/frontend/src/pages/settings/privacy.vue
+++ b/packages/frontend/src/pages/settings/privacy.vue
@@ -90,7 +90,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 		<SearchMarker :keywords="['lockdown']">
 			<FormSection>
-				<template #label><SearchLabel>{{ i18n.ts.lockdown }}</SearchLabel><span class="_beta">{{ i18n.ts.beta }}</span></template>
+				<template #label><SearchLabel>{{ i18n.ts.lockdown }}</SearchLabel></template>
 
 				<div class="_gaps_m">
 					<SearchMarker :keywords="['login', 'signin']">
@@ -213,9 +213,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <script lang="ts" setup>
 import { ref, computed, watch } from 'vue';
+import type { MkSelectItem } from '@/components/MkSelect.vue';
 import MkSwitch from '@/components/MkSwitch.vue';
 import MkSelect from '@/components/MkSelect.vue';
-import type { MkSelectItem } from '@/components/MkSelect.vue';
 import FormSection from '@/components/form/section.vue';
 import { misskeyApi } from '@/utility/misskey-api.js';
 import { i18n } from '@/i18n.js';
diff --git a/packages/frontend/src/pages/settings/profile.vue b/packages/frontend/src/pages/settings/profile.vue
index 89325dee63..7d3da470d6 100644
--- a/packages/frontend/src/pages/settings/profile.vue
+++ b/packages/frontend/src/pages/settings/profile.vue
@@ -107,7 +107,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 		<SearchMarker :keywords="['follow', 'message']">
 			<MkInput v-model="profile.followedMessage" :max="200" manualSave :mfmPreview="false">
-				<template #label><SearchLabel>{{ i18n.ts._profile.followedMessage }}</SearchLabel><span class="_beta">{{ i18n.ts.beta }}</span></template>
+				<template #label><SearchLabel>{{ i18n.ts._profile.followedMessage }}</SearchLabel></template>
 				<template #caption>
 					<div><SearchText>{{ i18n.ts._profile.followedMessageDescription }}</SearchText></div>
 					<div>{{ i18n.ts._profile.followedMessageDescriptionForLockedAccount }}</div>
diff --git a/packages/frontend/src/tips.ts b/packages/frontend/src/tips.ts
index 8a58e2aa63..6ee7130ee9 100644
--- a/packages/frontend/src/tips.ts
+++ b/packages/frontend/src/tips.ts
@@ -12,6 +12,7 @@ export const TIPS = [
 	'clips',
 	'userLists',
 	'postForm',
+	'deck',
 	'tl.home',
 	'tl.local',
 	'tl.social',
diff --git a/packages/frontend/src/ui/_common_/navbar.vue b/packages/frontend/src/ui/_common_/navbar.vue
index f37e7ae85e..c679ee7a92 100644
--- a/packages/frontend/src/ui/_common_/navbar.vue
+++ b/packages/frontend/src/ui/_common_/navbar.vue
@@ -14,6 +14,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<i v-if="store.r.realtimeMode.value" class="ti ti-bolt ti-fw"></i>
 				<i v-else class="ti ti-bolt-off ti-fw"></i>
 			</button>
+			<button v-if="!iconOnly && showWidgetButton" v-tooltip.noDelay.right="i18n.ts.widgets" class="_button" :class="[$style.widget]" @click="() => emit('widgetButtonClick')">
+				<i class="ti ti-apps ti-fw"></i>
+			</button>
 		</div>
 		<div :class="$style.middle">
 			<MkA v-tooltip.noDelay.right="i18n.ts.timeline" :class="$style.item" :activeClass="$style.active" to="/" exact>
@@ -51,7 +54,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			</MkA>
 		</div>
 		<div :class="$style.bottom">
-			<button v-if="showWidgetButton" v-tooltip.noDelay.right="i18n.ts.widgets" class="_button" :class="[$style.widget]" @click="() => emit('widgetButtonClick')">
+			<button v-if="iconOnly && showWidgetButton" v-tooltip.noDelay.right="i18n.ts.widgets" class="_button" :class="[$style.widget]" @click="() => emit('widgetButtonClick')">
 				<i class="ti ti-apps ti-fw"></i>
 			</button>
 			<button v-if="iconOnly" v-tooltip.noDelay.right="i18n.ts.realtimeMode" class="_button" :class="[$style.realtimeMode, store.r.realtimeMode.value ? $style.on : null]" @click="toggleRealtimeMode">
@@ -436,6 +439,12 @@ function menuEdit() {
 		}
 	}
 
+	.widget {
+		display: inline-block;
+		width: var(--top-height);
+		margin-left: auto;
+	}
+
 	.bottom {
 		position: sticky;
 		bottom: 0;
diff --git a/packages/frontend/src/ui/deck.vue b/packages/frontend/src/ui/deck.vue
index 0941c25467..484b7f277a 100644
--- a/packages/frontend/src/ui/deck.vue
+++ b/packages/frontend/src/ui/deck.vue
@@ -38,36 +38,39 @@ SPDX-License-Identifier: AGPL-3.0-only
 							@headerWheel="onWheel"
 						/>
 					</section>
-					<div v-if="layout.length === 0" class="_panel" :class="$style.onboarding">
+					<div v-if="layout.length === 0" class="_panel _gaps" :class="$style.onboarding">
 						<div>{{ i18n.ts._deck.introduction }}</div>
 						<div>{{ i18n.ts._deck.introduction2 }}</div>
+						<MkInfo v-if="!store.r.tips.value.deck" closable @close="closeTip('deck')">
+							<button class="_textButton" @click="showTour">{{ i18n.ts._deck.showHowToUse }}</button>
+						</MkInfo>
 					</div>
 				</div>
 
 				<div v-if="prefer.r['deck.menuPosition'].value === 'right'" :class="$style.sideMenu">
 					<div :class="$style.sideMenuTop">
-						<button v-tooltip.noDelay.left="`${i18n.ts._deck.profile}: ${prefer.s['deck.profile']}`" :class="$style.sideMenuButton" class="_button" @click="switchProfileMenu"><i class="ti ti-caret-down"></i></button>
+						<button ref="swicthProfileButtonEl" v-tooltip.noDelay.left="`${i18n.ts._deck.profile}: ${prefer.s['deck.profile']}`" :class="$style.sideMenuButton" class="_button" @click="switchProfileMenu"><i class="ti ti-caret-down"></i></button>
 						<button v-tooltip.noDelay.left="i18n.ts._deck.deleteProfile" :class="$style.sideMenuButton" class="_button" @click="deleteProfile"><i class="ti ti-trash"></i></button>
 					</div>
 					<div :class="$style.sideMenuMiddle">
-						<button v-tooltip.noDelay.left="i18n.ts._deck.addColumn" :class="$style.sideMenuButton" class="_button" @click="addColumn"><i class="ti ti-plus"></i></button>
+						<button ref="addColumnButtonEl" v-tooltip.noDelay.left="i18n.ts._deck.addColumn" :class="$style.sideMenuButton" class="_button" @click="addColumn"><i class="ti ti-plus"></i></button>
 					</div>
 					<div :class="$style.sideMenuBottom">
-						<button v-tooltip.noDelay.left="i18n.ts.settings" :class="$style.sideMenuButton" class="_button" @click="showSettings"><i class="ti ti-settings-2"></i></button>
+						<button ref="settingsButtonEl" v-tooltip.noDelay.left="i18n.ts.settings" :class="$style.sideMenuButton" class="_button" @click="showSettings"><i class="ti ti-settings-2"></i></button>
 					</div>
 				</div>
 			</div>
 
 			<div v-if="prefer.r['deck.menuPosition'].value === 'bottom'" :class="$style.bottomMenu">
 				<div :class="$style.bottomMenuLeft">
-					<button v-tooltip.noDelay.left="`${i18n.ts._deck.profile}: ${prefer.s['deck.profile']}`" :class="$style.bottomMenuButton" class="_button" @click="switchProfileMenu"><i class="ti ti-caret-down"></i></button>
-					<button v-tooltip.noDelay.left="i18n.ts._deck.deleteProfile" :class="$style.bottomMenuButton" class="_button" @click="deleteProfile"><i class="ti ti-trash"></i></button>
+					<button ref="swicthProfileButtonEl" v-tooltip.noDelay.top="`${i18n.ts._deck.profile}: ${prefer.s['deck.profile']}`" :class="$style.bottomMenuButton" class="_button" @click="switchProfileMenu"><i class="ti ti-caret-down"></i></button>
+					<button v-tooltip.noDelay.top="i18n.ts._deck.deleteProfile" :class="$style.bottomMenuButton" class="_button" @click="deleteProfile"><i class="ti ti-trash"></i></button>
 				</div>
 				<div :class="$style.bottomMenuMiddle">
-					<button v-tooltip.noDelay.left="i18n.ts._deck.addColumn" :class="$style.bottomMenuButton" class="_button" @click="addColumn"><i class="ti ti-plus"></i></button>
+					<button ref="addColumnButtonEl" v-tooltip.noDelay.top="i18n.ts._deck.addColumn" :class="$style.bottomMenuButton" class="_button" @click="addColumn"><i class="ti ti-plus"></i></button>
 				</div>
 				<div :class="$style.bottomMenuRight">
-					<button v-tooltip.noDelay.left="i18n.ts.settings" :class="$style.bottomMenuButton" class="_button" @click="showSettings"><i class="ti ti-settings-2"></i></button>
+					<button ref="settingsButtonEl" v-tooltip.noDelay.top="i18n.ts.settings" :class="$style.bottomMenuButton" class="_button" @click="showSettings"><i class="ti ti-settings-2"></i></button>
 				</div>
 			</div>
 
@@ -96,6 +99,7 @@ import { $i } from '@/i.js';
 import { i18n } from '@/i18n.js';
 import { deviceKind } from '@/utility/device-kind.js';
 import { prefer } from '@/preferences.js';
+import { store } from '@/store.js';
 import XMainColumn from '@/ui/deck/main-column.vue';
 import XTlColumn from '@/ui/deck/tl-column.vue';
 import XAntennaColumn from '@/ui/deck/antenna-column.vue';
@@ -107,10 +111,13 @@ import XMentionsColumn from '@/ui/deck/mentions-column.vue';
 import XDirectColumn from '@/ui/deck/direct-column.vue';
 import XRoleTimelineColumn from '@/ui/deck/role-timeline-column.vue';
 import XChatColumn from '@/ui/deck/chat-column.vue';
+import MkInfo from '@/components/MkInfo.vue';
 import { mainRouter } from '@/router.js';
 import { columns, layout, columnTypes, switchProfileMenu, addColumn as addColumnToStore, deleteProfile as deleteProfile_ } from '@/deck.js';
 import { shouldSuggestRestoreBackup } from '@/preferences/utility.js';
 import { shouldSuggestReload } from '@/utility/reload-suggest.js';
+import { startTour } from '@/utility/tour.js';
+import { closeTip } from '@/tips.js';
 
 const XStatusBars = defineAsyncComponent(() => import('@/ui/_common_/statusbars.vue'));
 const XAnnouncements = defineAsyncComponent(() => import('@/ui/_common_/announcements.vue'));
@@ -163,6 +170,9 @@ function showSettings() {
 }
 
 const columnsEl = useTemplateRef('columnsEl');
+const addColumnButtonEl = useTemplateRef('addColumnButtonEl');
+const settingsButtonEl = useTemplateRef('settingsButtonEl');
+const swicthProfileButtonEl = useTemplateRef('swicthProfileButtonEl');
 
 const addColumn = async (ev) => {
 	const { canceled, result: column } = await os.select({
@@ -218,6 +228,30 @@ async function deleteProfile() {
 	os.success();
 }
 
+function showTour() {
+	if (addColumnButtonEl.value == null ||
+		settingsButtonEl.value == null ||
+		swicthProfileButtonEl.value == null) {
+		return;
+	}
+
+	startTour([{
+		element: addColumnButtonEl.value,
+		title: i18n.ts._deck._howToUse.addColumn_title,
+		description: i18n.ts._deck._howToUse.addColumn_description,
+	}, {
+		element: settingsButtonEl.value,
+		title: i18n.ts._deck._howToUse.settings_title,
+		description: i18n.ts._deck._howToUse.settings_description,
+	}, {
+		element: swicthProfileButtonEl.value,
+		title: i18n.ts._deck._howToUse.switchProfile_title,
+		description: i18n.ts._deck._howToUse.switchProfile_description,
+	}]).then(() => {
+		closeTip('deck');
+	});
+}
+
 window.document.documentElement.style.overflowY = 'hidden';
 window.document.documentElement.style.scrollBehavior = 'auto';
 </script>
@@ -345,7 +379,7 @@ window.document.documentElement.style.scrollBehavior = 'auto';
 }
 
 .bottomMenuButton {
-	display: block;
+	display: inline-block;
 	height: 100%;
 	aspect-ratio: 1;
 }
diff --git a/packages/frontend/src/ui/universal.vue b/packages/frontend/src/ui/universal.vue
index 727fe08989..497ef72d04 100644
--- a/packages/frontend/src/ui/universal.vue
+++ b/packages/frontend/src/ui/universal.vue
@@ -8,7 +8,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<XTitlebar v-if="prefer.r.showTitlebar.value" style="flex-shrink: 0;"/>
 
 	<div :class="$style.nonTitlebarArea">
-		<XSidebar v-if="!isMobile" :class="$style.sidebar" :showWidgetButton="!isDesktop" @widgetButtonClick="widgetsShowing = true"/>
+		<XSidebar v-if="!isMobile" :class="$style.sidebar" :showWidgetButton="!showWidgetsSide" @widgetButtonClick="widgetsShowing = true"/>
 
 		<div :class="[$style.contents, !isMobile && prefer.r.showTitlebar.value ? $style.withSidebarAndTitlebar : null]" @contextmenu.stop="onContextmenu">
 			<div>
@@ -22,7 +22,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<XMobileFooterMenu v-if="isMobile" ref="navFooter" v-model:drawerMenuShowing="drawerMenuShowing" v-model:widgetsShowing="widgetsShowing"/>
 		</div>
 
-		<div v-if="isDesktop && !pageMetadata?.needWideArea" :class="$style.widgets">
+		<div v-if="showWidgetsSide && !pageMetadata?.needWideArea" :class="$style.widgets">
 			<XWidgets/>
 		</div>
 	</div>
@@ -64,7 +64,8 @@ const DESKTOP_THRESHOLD = 1100;
 const MOBILE_THRESHOLD = 500;
 
 // デスクトップでウィンドウを狭くしたときモバイルUIが表示されて欲しいことはあるので deviceKind === 'desktop' の判定は行わない
-const isDesktop = ref(window.innerWidth >= DESKTOP_THRESHOLD);
+const showWidgetsSide = window.innerWidth >= DESKTOP_THRESHOLD;
+
 const isMobile = ref(deviceKind === 'smartphone' || window.innerWidth <= MOBILE_THRESHOLD);
 window.addEventListener('resize', () => {
 	isMobile.value = deviceKind === 'smartphone' || window.innerWidth <= MOBILE_THRESHOLD;
@@ -102,14 +103,6 @@ if (window.innerWidth > 1024) {
 	}
 }
 
-onMounted(() => {
-	if (!isDesktop.value) {
-		window.addEventListener('resize', () => {
-			if (window.innerWidth >= DESKTOP_THRESHOLD) isDesktop.value = true;
-		}, { passive: true });
-	}
-});
-
 const onContextmenu = (ev) => {
 	if (isLink(ev.target)) return;
 	if (['INPUT', 'TEXTAREA', 'IMG', 'VIDEO', 'CANVAS'].includes(ev.target.tagName) || ev.target.attributes['contenteditable']) return;
diff --git a/packages/i18n/src/autogen/locale.ts b/packages/i18n/src/autogen/locale.ts
index 87be397901..e01048e638 100644
--- a/packages/i18n/src/autogen/locale.ts
+++ b/packages/i18n/src/autogen/locale.ts
@@ -10948,6 +10948,36 @@ export interface Locale extends ILocale {
          * プロファイル情報のデバイス間同期を有効にする
          */
         "enableSyncBetweenDevicesForProfiles": string;
+        /**
+         * UIの説明を見る
+         */
+        "showHowToUse": string;
+        "_howToUse": {
+            /**
+             * カラム追加
+             */
+            "addColumn_title": string;
+            /**
+             * カラムの種類を選んで追加できます。
+             */
+            "addColumn_description": string;
+            /**
+             * UI設定
+             */
+            "settings_title": string;
+            /**
+             * デッキUIの詳細設定を行えます。
+             */
+            "settings_description": string;
+            /**
+             * プロファイル切り替え
+             */
+            "switchProfile_title": string;
+            /**
+             * UIのレイアウトをプロファイルとして保存し、いつでも切り替えられるようにできます。
+             */
+            "switchProfile_description": string;
+        };
         "_columns": {
             /**
              * メイン
diff --git a/packages/misskey-js/package.json b/packages/misskey-js/package.json
index 68609f15d8..cd3cfd11e5 100644
--- a/packages/misskey-js/package.json
+++ b/packages/misskey-js/package.json
@@ -1,7 +1,7 @@
 {
 	"type": "module",
 	"name": "misskey-js",
-	"version": "2025.12.2-beta.1",
+	"version": "2025.12.2-beta.2",
 	"description": "Misskey SDK for JavaScript",
 	"license": "MIT",
 	"main": "./built/index.js",