diff --git a/src/client/app/auth/views/index.vue b/src/client/app/auth/views/index.vue
index 0fcd9bfe5..e53bbd026 100644
--- a/src/client/app/auth/views/index.vue
+++ b/src/client/app/auth/views/index.vue
@@ -1,6 +1,6 @@
 <template>
 <div class="index">
-	<main v-if="os.isSignedIn">
+	<main v-if="$store.getters.isSignedIn">
 		<p class="fetching" v-if="fetching">読み込み中<mk-ellipsis/></p>
 		<x-form
 			ref="form"
@@ -22,7 +22,7 @@
 			<p>セッションが存在しません。</p>
 		</div>
 	</main>
-	<main class="signin" v-if="!os.isSignedIn">
+	<main class="signin" v-if="!$store.getters.isSignedIn">
 		<h1>サインインしてください</h1>
 		<mk-signin/>
 	</main>
@@ -51,7 +51,7 @@ export default Vue.extend({
 		}
 	},
 	mounted() {
-		if (!this.$root.$data.os.isSignedIn) return;
+		if (!this.$root.$data.$store.getters.isSignedIn) return;
 
 		// Fetch session
 		(this as any).api('auth/session/show', {
diff --git a/src/client/app/common/scripts/streaming/home.ts b/src/client/app/common/scripts/streaming/home.ts
index 44d07e331..2715b9e0e 100644
--- a/src/client/app/common/scripts/streaming/home.ts
+++ b/src/client/app/common/scripts/streaming/home.ts
@@ -24,10 +24,8 @@ export class HomeStream extends Stream {
 			if (os.debug) {
 				console.log('I updated:', i);
 			}
-			merge(me, i);
 
-			// キャッシュ更新
-			os.bakeMe();
+			os.store.dispatch('mergeMe', i);
 		});
 
 		this.on('clientSettingUpdated', x => {
diff --git a/src/client/app/common/views/components/avatar.vue b/src/client/app/common/views/components/avatar.vue
index 3e1b17635..a65b62882 100644
--- a/src/client/app/common/views/components/avatar.vue
+++ b/src/client/app/common/views/components/avatar.vue
@@ -32,7 +32,7 @@ export default Vue.extend({
 						? `rgb(${ this.user.avatarColor.join(',') })`
 						: null,
 				backgroundImage: this.lightmode ? null : `url(${ this.user.avatarUrl }?thumbnail)`,
-				borderRadius: (this as any).clientSettings.circleIcons ? '100%' : null
+				borderRadius: this.$store.state.settings.circleIcons ? '100%' : null
 			};
 		}
 	}
diff --git a/src/client/app/common/views/components/messaging-room.message.vue b/src/client/app/common/views/components/messaging-room.message.vue
index ef39199dc..a77b5f365 100644
--- a/src/client/app/common/views/components/messaging-room.message.vue
+++ b/src/client/app/common/views/components/messaging-room.message.vue
@@ -8,7 +8,7 @@
 				<img src="/assets/desktop/messaging/delete.png" alt="Delete"/>
 			</button>
 			<div class="content" v-if="!message.isDeleted">
-				<mk-note-html class="text" v-if="message.text" ref="text" :text="message.text" :i="os.i"/>
+				<mk-note-html class="text" v-if="message.text" ref="text" :text="message.text" :i="$store.state.i"/>
 				<div class="file" v-if="message.file">
 					<a :href="message.file.url" target="_blank" :title="message.file.name">
 						<img v-if="message.file.type.split('/')[0] == 'image'" :src="message.file.url" :alt="message.file.name"/>
@@ -42,7 +42,7 @@ export default Vue.extend({
 	},
 	computed: {
 		isMe(): boolean {
-			return this.message.userId == (this as any).os.i.id;
+			return this.message.userId == this.$store.state.i.id;
 		},
 		urls(): string[] {
 			if (this.message.text) {
diff --git a/src/client/app/common/views/components/messaging-room.vue b/src/client/app/common/views/components/messaging-room.vue
index 79756b22e..b2831d692 100644
--- a/src/client/app/common/views/components/messaging-room.vue
+++ b/src/client/app/common/views/components/messaging-room.vue
@@ -72,7 +72,7 @@ export default Vue.extend({
 	},
 
 	mounted() {
-		this.connection = new MessagingStream((this as any).os, (this as any).os.i, this.user.id);
+		this.connection = new MessagingStream((this as any).os, this.$store.state.i, this.user.id);
 
 		this.connection.on('message', this.onMessage);
 		this.connection.on('read', this.onRead);
@@ -164,7 +164,7 @@ export default Vue.extend({
 			const isBottom = this.isBottom();
 
 			this.messages.push(message);
-			if (message.userId != (this as any).os.i.id && !document.hidden) {
+			if (message.userId != this.$store.state.i.id && !document.hidden) {
 				this.connection.send({
 					type: 'read',
 					id: message.id
@@ -176,7 +176,7 @@ export default Vue.extend({
 				this.$nextTick(() => {
 					this.scrollToBottom();
 				});
-			} else if (message.userId != (this as any).os.i.id) {
+			} else if (message.userId != this.$store.state.i.id) {
 				// Notify
 				this.notifyNewMessage();
 			}
@@ -229,7 +229,7 @@ export default Vue.extend({
 		onVisibilitychange() {
 			if (document.hidden) return;
 			this.messages.forEach(message => {
-				if (message.userId !== (this as any).os.i.id && !message.isRead) {
+				if (message.userId !== this.$store.state.i.id && !message.isRead) {
 					this.connection.send({
 						type: 'read',
 						id: message.id
diff --git a/src/client/app/common/views/components/messaging.vue b/src/client/app/common/views/components/messaging.vue
index 11f9c366d..2ddec2998 100644
--- a/src/client/app/common/views/components/messaging.vue
+++ b/src/client/app/common/views/components/messaging.vue
@@ -95,7 +95,7 @@ export default Vue.extend({
 	methods: {
 		getAcct,
 		isMe(message) {
-			return message.userId == (this as any).os.i.id;
+			return message.userId == this.$store.state.i.id;
 		},
 		onMessage(message) {
 			this.messages = this.messages.filter(m => !(
diff --git a/src/client/app/common/views/components/note-menu.vue b/src/client/app/common/views/components/note-menu.vue
index 88dc22aaf..fb9505504 100644
--- a/src/client/app/common/views/components/note-menu.vue
+++ b/src/client/app/common/views/components/note-menu.vue
@@ -3,7 +3,7 @@
 	<div class="backdrop" ref="backdrop" @click="close"></div>
 	<div class="popover" :class="{ compact }" ref="popover">
 		<button @click="favorite">%i18n:@favorite%</button>
-		<button v-if="note.userId == os.i.id" @click="pin">%i18n:@pin%</button>
+		<button v-if="note.userId == $store.state.i.id" @click="pin">%i18n:@pin%</button>
 		<a v-if="note.uri" :href="note.uri" target="_blank">%i18n:@remote%</a>
 	</div>
 </div>
diff --git a/src/client/app/common/views/components/othello.game.vue b/src/client/app/common/views/components/othello.game.vue
index ea75558d1..4c63bd18b 100644
--- a/src/client/app/common/views/components/othello.game.vue
+++ b/src/client/app/common/views/components/othello.game.vue
@@ -61,13 +61,13 @@ export default Vue.extend({
 
 	computed: {
 		iAmPlayer(): boolean {
-			if (!(this as any).os.isSignedIn) return false;
-			return this.game.user1Id == (this as any).os.i.id || this.game.user2Id == (this as any).os.i.id;
+			if (!this.$store.getters.isSignedIn) return false;
+			return this.game.user1Id == this.$store.state.i.id || this.game.user2Id == this.$store.state.i.id;
 		},
 		myColor(): Color {
 			if (!this.iAmPlayer) return null;
-			if (this.game.user1Id == (this as any).os.i.id && this.game.black == 1) return true;
-			if (this.game.user2Id == (this as any).os.i.id && this.game.black == 2) return true;
+			if (this.game.user1Id == this.$store.state.i.id && this.game.black == 1) return true;
+			if (this.game.user2Id == this.$store.state.i.id && this.game.black == 2) return true;
 			return false;
 		},
 		opColor(): Color {
@@ -91,7 +91,7 @@ export default Vue.extend({
 		},
 		isMyTurn(): boolean {
 			if (this.turnUser == null) return null;
-			return this.turnUser.id == (this as any).os.i.id;
+			return this.turnUser.id == this.$store.state.i.id;
 		}
 	},
 
diff --git a/src/client/app/common/views/components/othello.gameroom.vue b/src/client/app/common/views/components/othello.gameroom.vue
index dba9ccd16..2dbd04ce4 100644
--- a/src/client/app/common/views/components/othello.gameroom.vue
+++ b/src/client/app/common/views/components/othello.gameroom.vue
@@ -25,7 +25,7 @@ export default Vue.extend({
 	},
 	created() {
 		this.g = this.game;
-		this.connection = new OthelloGameStream((this as any).os, (this as any).os.i, this.game);
+		this.connection = new OthelloGameStream((this as any).os, this.$store.state.i, this.game);
 		this.connection.on('started', this.onStarted);
 	},
 	beforeDestroy() {
diff --git a/src/client/app/common/views/components/othello.room.vue b/src/client/app/common/views/components/othello.room.vue
index 86368b3cc..dcf41f2e0 100644
--- a/src/client/app/common/views/components/othello.room.vue
+++ b/src/client/app/common/views/components/othello.room.vue
@@ -116,13 +116,13 @@ export default Vue.extend({
 			return categories.filter((item, pos) => categories.indexOf(item) == pos);
 		},
 		isAccepted(): boolean {
-			if (this.game.user1Id == (this as any).os.i.id && this.game.user1Accepted) return true;
-			if (this.game.user2Id == (this as any).os.i.id && this.game.user2Accepted) return true;
+			if (this.game.user1Id == this.$store.state.i.id && this.game.user1Accepted) return true;
+			if (this.game.user2Id == this.$store.state.i.id && this.game.user2Accepted) return true;
 			return false;
 		},
 		isOpAccepted(): boolean {
-			if (this.game.user1Id != (this as any).os.i.id && this.game.user1Accepted) return true;
-			if (this.game.user2Id != (this as any).os.i.id && this.game.user2Accepted) return true;
+			if (this.game.user1Id != this.$store.state.i.id && this.game.user1Accepted) return true;
+			if (this.game.user2Id != this.$store.state.i.id && this.game.user2Accepted) return true;
 			return false;
 		}
 	},
@@ -133,8 +133,8 @@ export default Vue.extend({
 		this.connection.on('init-form', this.onInitForm);
 		this.connection.on('message', this.onMessage);
 
-		if (this.game.user1Id != (this as any).os.i.id && this.game.settings.form1) this.form = this.game.settings.form1;
-		if (this.game.user2Id != (this as any).os.i.id && this.game.settings.form2) this.form = this.game.settings.form2;
+		if (this.game.user1Id != this.$store.state.i.id && this.game.settings.form1) this.form = this.game.settings.form1;
+		if (this.game.user2Id != this.$store.state.i.id && this.game.settings.form2) this.form = this.game.settings.form2;
 	},
 
 	beforeDestroy() {
@@ -185,12 +185,12 @@ export default Vue.extend({
 		},
 
 		onInitForm(x) {
-			if (x.userId == (this as any).os.i.id) return;
+			if (x.userId == this.$store.state.i.id) return;
 			this.form = x.form;
 		},
 
 		onMessage(x) {
-			if (x.userId == (this as any).os.i.id) return;
+			if (x.userId == this.$store.state.i.id) return;
 			this.messages.unshift(x.message);
 		},
 
diff --git a/src/client/app/common/views/components/twitter-setting.vue b/src/client/app/common/views/components/twitter-setting.vue
index 9a2a1c3d4..d1cb78c54 100644
--- a/src/client/app/common/views/components/twitter-setting.vue
+++ b/src/client/app/common/views/components/twitter-setting.vue
@@ -1,13 +1,13 @@
 <template>
 <div class="mk-twitter-setting">
 	<p>%i18n:@description%<a :href="`${docsUrl}/link-to-twitter`" target="_blank">%i18n:@detail%</a></p>
-	<p class="account" v-if="os.i.twitter" :title="`Twitter ID: ${os.i.twitter.userId}`">%i18n:@connected-to%: <a :href="`https://twitter.com/${os.i.twitter.screenName}`" target="_blank">@{{ os.i.twitter.screenName }}</a></p>
+	<p class="account" v-if="$store.state.i.twitter" :title="`Twitter ID: ${$store.state.i.twitter.userId}`">%i18n:@connected-to%: <a :href="`https://twitter.com/${$store.state.i.twitter.screenName}`" target="_blank">@{{ $store.state.i.twitter.screenName }}</a></p>
 	<p>
-		<a :href="`${apiUrl}/connect/twitter`" target="_blank" @click.prevent="connect">{{ os.i.twitter ? '%i18n:@reconnect%' : '%i18n:@connect%' }}</a>
-		<span v-if="os.i.twitter"> or </span>
-		<a :href="`${apiUrl}/disconnect/twitter`" target="_blank" v-if="os.i.twitter" @click.prevent="disconnect">%i18n:@disconnect%</a>
+		<a :href="`${apiUrl}/connect/twitter`" target="_blank" @click.prevent="connect">{{ $store.state.i.twitter ? '%i18n:@reconnect%' : '%i18n:@connect%' }}</a>
+		<span v-if="$store.state.i.twitter"> or </span>
+		<a :href="`${apiUrl}/disconnect/twitter`" target="_blank" v-if="$store.state.i.twitter" @click.prevent="disconnect">%i18n:@disconnect%</a>
 	</p>
-	<p class="id" v-if="os.i.twitter">Twitter ID: {{ os.i.twitter.userId }}</p>
+	<p class="id" v-if="$store.state.i.twitter">Twitter ID: {{ $store.state.i.twitter.userId }}</p>
 </div>
 </template>
 
@@ -24,8 +24,8 @@ export default Vue.extend({
 		};
 	},
 	mounted() {
-		this.$watch('os.i', () => {
-			if ((this as any).os.i.twitter) {
+		this.$watch('$store.state.i', () => {
+			if (this.$store.state.i.twitter) {
 				if (this.form) this.form.close();
 			}
 		}, {
diff --git a/src/client/app/common/views/components/uploader.vue b/src/client/app/common/views/components/uploader.vue
index a6caa80f3..f4797d89f 100644
--- a/src/client/app/common/views/components/uploader.vue
+++ b/src/client/app/common/views/components/uploader.vue
@@ -50,7 +50,7 @@ export default Vue.extend({
 			reader.readAsDataURL(file);
 
 			const data = new FormData();
-			data.append('i', (this as any).os.i.token);
+			data.append('i', this.$store.state.i.token);
 			data.append('file', file);
 
 			if (folder) data.append('folderId', folder);
diff --git a/src/client/app/desktop/api/choose-drive-file.ts b/src/client/app/desktop/api/choose-drive-file.ts
index fbda600e6..3d0004b74 100644
--- a/src/client/app/desktop/api/choose-drive-file.ts
+++ b/src/client/app/desktop/api/choose-drive-file.ts
@@ -1,18 +1,17 @@
+import OS from '../../mios';
 import { url } from '../../config';
 import MkChooseFileFromDriveWindow from '../views/components/choose-file-from-drive-window.vue';
 
-export default function(opts) {
+export default (os: OS) => opts => {
 	return new Promise((res, rej) => {
 		const o = opts || {};
 
 		if (document.body.clientWidth > 800) {
-			const w = new MkChooseFileFromDriveWindow({
-				propsData: {
-					title: o.title,
-					multiple: o.multiple,
-					initFolder: o.currentFolder
-				}
-			}).$mount();
+			const w = os.new(MkChooseFileFromDriveWindow, {
+				title: o.title,
+				multiple: o.multiple,
+				initFolder: o.currentFolder
+			});
 			w.$once('selected', file => {
 				res(file);
 			});
@@ -27,4 +26,4 @@ export default function(opts) {
 				'height=500, width=800');
 		}
 	});
-}
+};
diff --git a/src/client/app/desktop/api/choose-drive-folder.ts b/src/client/app/desktop/api/choose-drive-folder.ts
index 9b33a20d9..68dc7988b 100644
--- a/src/client/app/desktop/api/choose-drive-folder.ts
+++ b/src/client/app/desktop/api/choose-drive-folder.ts
@@ -1,17 +1,16 @@
+import OS from '../../mios';
 import MkChooseFolderFromDriveWindow from '../views/components/choose-folder-from-drive-window.vue';
 
-export default function(opts) {
+export default (os: OS) => opts => {
 	return new Promise((res, rej) => {
 		const o = opts || {};
-		const w = new MkChooseFolderFromDriveWindow({
-			propsData: {
-				title: o.title,
-				initFolder: o.currentFolder
-			}
-		}).$mount();
+		const w = os.new(MkChooseFolderFromDriveWindow, {
+			title: o.title,
+			initFolder: o.currentFolder
+		});
 		w.$once('selected', folder => {
 			res(folder);
 		});
 		document.body.appendChild(w.$el);
 	});
-}
+};
diff --git a/src/client/app/desktop/api/update-avatar.ts b/src/client/app/desktop/api/update-avatar.ts
index 8ddaebc07..887367a24 100644
--- a/src/client/app/desktop/api/update-avatar.ts
+++ b/src/client/app/desktop/api/update-avatar.ts
@@ -6,17 +6,15 @@ import ProgressDialog from '../views/components/progress-dialog.vue';
 export default (os: OS) => (cb, file = null) => {
 	const fileSelected = file => {
 
-		const w = new CropWindow({
-			propsData: {
-				image: file,
-				title: 'アバターとして表示する部分を選択',
-				aspectRatio: 1 / 1
-			}
-		}).$mount();
+		const w = os.new(CropWindow, {
+			image: file,
+			title: 'アバターとして表示する部分を選択',
+			aspectRatio: 1 / 1
+		});
 
 		w.$once('cropped', blob => {
 			const data = new FormData();
-			data.append('i', os.i.token);
+			data.append('i', os.store.state.i.token);
 			data.append('file', blob, file.name + '.cropped.png');
 
 			os.api('drive/folders/find', {
@@ -42,11 +40,9 @@ export default (os: OS) => (cb, file = null) => {
 	};
 
 	const upload = (data, folder) => {
-		const dialog = new ProgressDialog({
-			propsData: {
-				title: '新しいアバターをアップロードしています'
-			}
-		}).$mount();
+		const dialog = os.new(ProgressDialog, {
+			title: '新しいアバターをアップロードしています'
+		});
 		document.body.appendChild(dialog.$el);
 
 		if (folder) data.append('folderId', folder.id);
@@ -70,8 +66,14 @@ export default (os: OS) => (cb, file = null) => {
 		os.api('i/update', {
 			avatarId: file.id
 		}).then(i => {
-			os.i.avatarId = i.avatarId;
-			os.i.avatarUrl = i.avatarUrl;
+			os.store.commit('updateIKeyValue', {
+				key: 'avatarId',
+				value: i.avatarId
+			});
+			os.store.commit('updateIKeyValue', {
+				key: 'avatarUrl',
+				value: i.avatarUrl
+			});
 
 			os.apis.dialog({
 				title: '%fa:info-circle%アバターを更新しました',
diff --git a/src/client/app/desktop/api/update-banner.ts b/src/client/app/desktop/api/update-banner.ts
index 1a5da272b..4e6dd4e2c 100644
--- a/src/client/app/desktop/api/update-banner.ts
+++ b/src/client/app/desktop/api/update-banner.ts
@@ -6,17 +6,15 @@ import ProgressDialog from '../views/components/progress-dialog.vue';
 export default (os: OS) => {
 
 	const cropImage = file => new Promise((resolve, reject) => {
-		const w = new CropWindow({
-			propsData: {
-				image: file,
-				title: 'バナーとして表示する部分を選択',
-				aspectRatio: 16 / 9
-			}
-		}).$mount();
+		const w = os.new(CropWindow, {
+			image: file,
+			title: 'バナーとして表示する部分を選択',
+			aspectRatio: 16 / 9
+		});
 
 		w.$once('cropped', blob => {
 			const data = new FormData();
-			data.append('i', os.i.token);
+			data.append('i', os.store.state.i.token);
 			data.append('file', blob, file.name + '.cropped.png');
 
 			os.api('drive/folders/find', {
@@ -44,11 +42,9 @@ export default (os: OS) => {
 	});
 
 	const upload = (data, folder) => new Promise((resolve, reject) => {
-		const dialog = new ProgressDialog({
-			propsData: {
-				title: '新しいバナーをアップロードしています'
-			}
-		}).$mount();
+		const dialog = os.new(ProgressDialog, {
+			title: '新しいバナーをアップロードしています'
+		});
 		document.body.appendChild(dialog.$el);
 
 		if (folder) data.append('folderId', folder.id);
@@ -73,8 +69,14 @@ export default (os: OS) => {
 		return os.api('i/update', {
 			bannerId: file.id
 		}).then(i => {
-			os.i.bannerId = i.bannerId;
-			os.i.bannerUrl = i.bannerUrl;
+			os.store.commit('updateIKeyValue', {
+				key: 'bannerId',
+				value: i.bannerId
+			});
+			os.store.commit('updateIKeyValue', {
+				key: 'bannerUrl',
+				value: i.bannerUrl
+			});
 
 			os.apis.dialog({
 				title: '%fa:info-circle%バナーを更新しました',
diff --git a/src/client/app/desktop/script.ts b/src/client/app/desktop/script.ts
index 2658a86b9..09a9257ea 100644
--- a/src/client/app/desktop/script.ts
+++ b/src/client/app/desktop/script.ts
@@ -2,7 +2,6 @@
  * Desktop Client
  */
 
-import Vue from 'vue';
 import VueRouter from 'vue-router';
 
 // Style
@@ -68,8 +67,8 @@ init(async (launch) => {
 
 	// Launch the app
 	const [, os] = launch(router, os => ({
-		chooseDriveFolder,
-		chooseDriveFile,
+		chooseDriveFolder: chooseDriveFolder(os),
+		chooseDriveFile: chooseDriveFile(os),
 		dialog,
 		input,
 		post,
diff --git a/src/client/app/desktop/views/components/drive.file.vue b/src/client/app/desktop/views/components/drive.file.vue
index fb553e1ae..fe8f57bc5 100644
--- a/src/client/app/desktop/views/components/drive.file.vue
+++ b/src/client/app/desktop/views/components/drive.file.vue
@@ -9,10 +9,10 @@
 	@contextmenu.prevent.stop="onContextmenu"
 	:title="title"
 >
-	<div class="label" v-if="os.i.avatarId == file.id"><img src="/assets/label.svg"/>
+	<div class="label" v-if="$store.state.i.avatarId == file.id"><img src="/assets/label.svg"/>
 		<p>%i18n:@avatar%</p>
 	</div>
-	<div class="label" v-if="os.i.bannerId == file.id"><img src="/assets/label.svg"/>
+	<div class="label" v-if="$store.state.i.bannerId == file.id"><img src="/assets/label.svg"/>
 		<p>%i18n:@banner%</p>
 	</div>
 	<div class="thumbnail" ref="thumbnail" :style="`background-color: ${ background }`">
diff --git a/src/client/app/desktop/views/components/home.vue b/src/client/app/desktop/views/components/home.vue
index d84c1e404..9d34575e5 100644
--- a/src/client/app/desktop/views/components/home.vue
+++ b/src/client/app/desktop/views/components/home.vue
@@ -51,7 +51,7 @@
 			<div class="main">
 				<a @click="hint">カスタマイズのヒント</a>
 				<div>
-					<mk-post-form v-if="clientSettings.showPostFormOnTopOfTl"/>
+					<mk-post-form v-if="$store.state.settings.showPostFormOnTopOfTl"/>
 					<mk-timeline ref="tl" @loaded="onTlLoaded"/>
 				</div>
 			</div>
@@ -61,7 +61,7 @@
 				<component v-for="widget in widgets[place]" :is="`mkw-${widget.name}`" :key="widget.id" :ref="widget.id" :widget="widget" @chosen="warp"/>
 			</div>
 			<div class="main">
-				<mk-post-form v-if="clientSettings.showPostFormOnTopOfTl"/>
+				<mk-post-form v-if="$store.state.settings.showPostFormOnTopOfTl"/>
 				<mk-timeline ref="tl" @loaded="onTlLoaded" v-if="mode == 'timeline'"/>
 				<mk-mentions @loaded="onTlLoaded" v-if="mode == 'mentions'"/>
 			</div>
diff --git a/src/client/app/desktop/views/components/note-detail.sub.vue b/src/client/app/desktop/views/components/note-detail.sub.vue
index c798b41b2..0471c70ee 100644
--- a/src/client/app/desktop/views/components/note-detail.sub.vue
+++ b/src/client/app/desktop/views/components/note-detail.sub.vue
@@ -16,7 +16,7 @@
 		<div class="body">
 			<div class="text">
 				<span v-if="note.isHidden" style="opacity: 0.5">%i18n:@private%</span>
-				<mk-note-html v-if="note.text" :text="note.text" :i="os.i"/>
+				<mk-note-html v-if="note.text" :text="note.text" :i="$store.state.i"/>
 			</div>
 			<div class="media" v-if="note.mediaIds.length > 0">
 				<mk-media-list :media-list="note.media"/>
diff --git a/src/client/app/desktop/views/components/note-detail.vue b/src/client/app/desktop/views/components/note-detail.vue
index 5b48b7a1b..e64990b4c 100644
--- a/src/client/app/desktop/views/components/note-detail.vue
+++ b/src/client/app/desktop/views/components/note-detail.vue
@@ -39,7 +39,7 @@
 		<div class="body">
 			<div class="text">
 				<span v-if="p.isHidden" style="opacity: 0.5">%i18n:@private%</span>
-				<mk-note-html v-if="p.text" :text="p.text" :i="os.i"/>
+				<mk-note-html v-if="p.text" :text="p.text" :i="$store.state.i"/>
 			</div>
 			<div class="media" v-if="p.media.length > 0">
 				<mk-media-list :media-list="p.media" :raw="true"/>
@@ -158,7 +158,7 @@ export default Vue.extend({
 
 		// Draw map
 		if (this.p.geo) {
-			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).clientSettings.showMaps : true;
+			const shouldShowMap = this.$store.getters.isSignedIn ? this.$store.state.settings.showMaps : true;
 			if (shouldShowMap) {
 				(this as any).os.getGoogleMaps().then(maps => {
 					const uluru = new maps.LatLng(this.p.geo.coordinates[1], this.p.geo.coordinates[0]);
diff --git a/src/client/app/desktop/views/components/notes.note.vue b/src/client/app/desktop/views/components/notes.note.vue
index 4448820eb..e69e6cdb5 100644
--- a/src/client/app/desktop/views/components/notes.note.vue
+++ b/src/client/app/desktop/views/components/notes.note.vue
@@ -1,6 +1,6 @@
 <template>
 <div class="note" tabindex="-1" :title="title" @keydown="onKeydown">
-	<div class="reply-to" v-if="p.reply && (!os.isSignedIn || clientSettings.showReplyTarget)">
+	<div class="reply-to" v-if="p.reply && (!$store.getters.isSignedIn || $store.state.settings.showReplyTarget)">
 		<x-sub :note="p.reply"/>
 	</div>
 	<div class="renote" v-if="isRenote">
@@ -43,7 +43,7 @@
 					<div class="text">
 						<span v-if="p.isHidden" style="opacity: 0.5">(この投稿は非公開です)</span>
 						<a class="reply" v-if="p.reply">%fa:reply%</a>
-						<mk-note-html v-if="p.text && !canHideText(p)" :text="p.text" :i="os.i" :class="$style.text"/>
+						<mk-note-html v-if="p.text && !canHideText(p)" :text="p.text" :i="$store.state.i" :class="$style.text"/>
 						<a class="rp" v-if="p.renote">RP:</a>
 					</div>
 					<div class="media" v-if="p.media.length > 0">
@@ -166,7 +166,7 @@ export default Vue.extend({
 	},
 
 	created() {
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection = (this as any).os.stream.getConnection();
 			this.connectionId = (this as any).os.stream.use();
 		}
@@ -175,13 +175,13 @@ export default Vue.extend({
 	mounted() {
 		this.capture(true);
 
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection.on('_connected_', this.onStreamConnected);
 		}
 
 		// Draw map
 		if (this.p.geo) {
-			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).clientSettings.showMaps : true;
+			const shouldShowMap = this.$store.getters.isSignedIn ? this.$store.state.settings.showMaps : true;
 			if (shouldShowMap) {
 				(this as any).os.getGoogleMaps().then(maps => {
 					const uluru = new maps.LatLng(this.p.geo.coordinates[1], this.p.geo.coordinates[0]);
@@ -201,7 +201,7 @@ export default Vue.extend({
 	beforeDestroy() {
 		this.decapture(true);
 
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection.off('_connected_', this.onStreamConnected);
 			(this as any).os.stream.dispose(this.connectionId);
 		}
@@ -211,7 +211,7 @@ export default Vue.extend({
 		canHideText,
 
 		capture(withHandler = false) {
-			if ((this as any).os.isSignedIn) {
+			if (this.$store.getters.isSignedIn) {
 				this.connection.send({
 					type: 'capture',
 					id: this.p.id
@@ -221,7 +221,7 @@ export default Vue.extend({
 		},
 
 		decapture(withHandler = false) {
-			if ((this as any).os.isSignedIn) {
+			if (this.$store.getters.isSignedIn) {
 				this.connection.send({
 					type: 'decapture',
 					id: this.p.id
diff --git a/src/client/app/desktop/views/components/notes.vue b/src/client/app/desktop/views/components/notes.vue
index 55b0de3fb..5a147f31e 100644
--- a/src/client/app/desktop/views/components/notes.vue
+++ b/src/client/app/desktop/views/components/notes.vue
@@ -118,24 +118,24 @@ export default Vue.extend({
 
 		prepend(note, silent = false) {
 			//#region 弾く
-			const isMyNote = note.userId == (this as any).os.i.id;
+			const isMyNote = note.userId == this.$store.state.i.id;
 			const isPureRenote = note.renoteId != null && note.text == null && note.mediaIds.length == 0 && note.poll == null;
 
-			if ((this as any).clientSettings.showMyRenotes === false) {
+			if (this.$store.state.settings.showMyRenotes === false) {
 				if (isMyNote && isPureRenote) {
 					return;
 				}
 			}
 
-			if ((this as any).clientSettings.showRenotedMyNotes === false) {
-				if (isPureRenote && (note.renote.userId == (this as any).os.i.id)) {
+			if (this.$store.state.settings.showRenotedMyNotes === false) {
+				if (isPureRenote && (note.renote.userId == this.$store.state.i.id)) {
 					return;
 				}
 			}
 			//#endregion
 
 			// 投稿が自分のものではないかつ、タブが非表示またはスクロール位置が最上部ではないならタイトルで通知
-			if ((document.hidden || !this.isScrollTop()) && note.userId !== (this as any).os.i.id) {
+			if ((document.hidden || !this.isScrollTop()) && note.userId !== this.$store.state.i.id) {
 				this.unreadCount++;
 				document.title = `(${this.unreadCount}) ${getNoteSummary(note)}`;
 			}
@@ -199,7 +199,7 @@ export default Vue.extend({
 				this.clearNotification();
 			}
 
-			if ((this as any).clientSettings.fetchOnScroll !== false) {
+			if (this.$store.state.settings.fetchOnScroll !== false) {
 				const current = window.scrollY + window.innerHeight;
 				if (current > document.body.offsetHeight - 8) this.loadMore();
 			}
diff --git a/src/client/app/desktop/views/components/post-form.vue b/src/client/app/desktop/views/components/post-form.vue
index 39bec6cf0..8eec677b0 100644
--- a/src/client/app/desktop/views/components/post-form.vue
+++ b/src/client/app/desktop/views/components/post-form.vue
@@ -118,7 +118,7 @@ export default Vue.extend({
 				const mention = x.host ? `@${x.username}@${x.host}` : `@${x.username}`;
 
 				// 自分は除外
-				if (this.os.i.username == x.username && x.host == null) return;
+				if (this.$store.state.i.username == x.username && x.host == null) return;
 
 				// 重複は除外
 				if (this.text.indexOf(`${mention} `) != -1) return;
diff --git a/src/client/app/desktop/views/components/settings.2fa.vue b/src/client/app/desktop/views/components/settings.2fa.vue
index 0809dd798..3e8c860eb 100644
--- a/src/client/app/desktop/views/components/settings.2fa.vue
+++ b/src/client/app/desktop/views/components/settings.2fa.vue
@@ -2,8 +2,8 @@
 <div class="2fa">
 	<p>%i18n:@intro%<a href="%i18n:@url%" target="_blank">%i18n:@detail%</a></p>
 	<div class="ui info warn"><p>%fa:exclamation-triangle%%i18n:@caution%</p></div>
-	<p v-if="!data && !os.i.twoFactorEnabled"><button @click="register" class="ui primary">%i18n:@register%</button></p>
-	<template v-if="os.i.twoFactorEnabled">
+	<p v-if="!data && !$store.state.i.twoFactorEnabled"><button @click="register" class="ui primary">%i18n:@register%</button></p>
+	<template v-if="$store.state.i.twoFactorEnabled">
 		<p>%i18n:@already-registered%</p>
 		<button @click="unregister" class="ui">%i18n:@unregister%</button>
 	</template>
@@ -54,7 +54,7 @@ export default Vue.extend({
 					password: password
 				}).then(() => {
 					(this as any).apis.notify('%i18n:@unregistered%');
-					(this as any).os.i.twoFactorEnabled = false;
+					this.$store.state.i.twoFactorEnabled = false;
 				});
 			});
 		},
@@ -64,7 +64,7 @@ export default Vue.extend({
 				token: this.token
 			}).then(() => {
 				(this as any).apis.notify('%i18n:@success%');
-				(this as any).os.i.twoFactorEnabled = true;
+				this.$store.state.i.twoFactorEnabled = true;
 			}).catch(() => {
 				(this as any).apis.notify('%i18n:@failed%');
 			});
diff --git a/src/client/app/desktop/views/components/settings.api.vue b/src/client/app/desktop/views/components/settings.api.vue
index b8eef3de6..113764c3e 100644
--- a/src/client/app/desktop/views/components/settings.api.vue
+++ b/src/client/app/desktop/views/components/settings.api.vue
@@ -1,6 +1,6 @@
 <template>
 <div class="root api">
-	<p>%i18n:@token% <code>{{ os.i.token }}</code></p>
+	<p>%i18n:@token% <code>{{ $store.state.i.token }}</code></p>
 	<p>%i18n:@intro%</p>
 	<div class="ui info warn"><p>%fa:exclamation-triangle%%i18n:@caution%</p></div>
 	<p>%i18n:@regeneration-of-token%</p>
diff --git a/src/client/app/desktop/views/components/settings.profile.vue b/src/client/app/desktop/views/components/settings.profile.vue
index 132ab12f1..9932cbf7d 100644
--- a/src/client/app/desktop/views/components/settings.profile.vue
+++ b/src/client/app/desktop/views/components/settings.profile.vue
@@ -2,7 +2,7 @@
 <div class="profile">
 	<label class="avatar ui from group">
 		<p>%i18n:@avatar%</p>
-		<img class="avatar" :src="`${os.i.avatarUrl}?thumbnail&size=64`" alt="avatar"/>
+		<img class="avatar" :src="`${$store.state.i.avatarUrl}?thumbnail&size=64`" alt="avatar"/>
 		<button class="ui" @click="updateAvatar">%i18n:@choice-avatar%</button>
 	</label>
 	<label class="ui from group">
@@ -24,8 +24,8 @@
 	<button class="ui primary" @click="save">%i18n:@save%</button>
 	<section>
 		<h2>その他</h2>
-		<mk-switch v-model="os.i.isBot" @change="onChangeIsBot" text="%i18n:@is-bot%"/>
-		<mk-switch v-model="os.i.isCat" @change="onChangeIsCat" text="%i18n:@is-cat%"/>
+		<mk-switch v-model="$store.state.i.isBot" @change="onChangeIsBot" text="%i18n:@is-bot%"/>
+		<mk-switch v-model="$store.state.i.isCat" @change="onChangeIsCat" text="%i18n:@is-cat%"/>
 	</section>
 </div>
 </template>
@@ -43,10 +43,10 @@ export default Vue.extend({
 		};
 	},
 	created() {
-		this.name = (this as any).os.i.name || '';
-		this.location = (this as any).os.i.profile.location;
-		this.description = (this as any).os.i.description;
-		this.birthday = (this as any).os.i.profile.birthday;
+		this.name = this.$store.state.i.name || '';
+		this.location = this.$store.state.i.profile.location;
+		this.description = this.$store.state.i.description;
+		this.birthday = this.$store.state.i.profile.birthday;
 	},
 	methods: {
 		updateAvatar() {
@@ -64,12 +64,12 @@ export default Vue.extend({
 		},
 		onChangeIsBot() {
 			(this as any).api('i/update', {
-				isBot: (this as any).os.i.isBot
+				isBot: this.$store.state.i.isBot
 			});
 		},
 		onChangeIsCat() {
 			(this as any).api('i/update', {
-				isCat: (this as any).os.i.isCat
+				isCat: this.$store.state.i.isCat
 			});
 		}
 	}
diff --git a/src/client/app/desktop/views/components/settings.vue b/src/client/app/desktop/views/components/settings.vue
index dac5fe67c..1bfff8cc8 100644
--- a/src/client/app/desktop/views/components/settings.vue
+++ b/src/client/app/desktop/views/components/settings.vue
@@ -20,7 +20,7 @@
 
 		<section class="web" v-show="page == 'web'">
 			<h1>%i18n:@behaviour%</h1>
-			<mk-switch v-model="clientSettings.fetchOnScroll" @change="onChangeFetchOnScroll" text="%i18n:@fetch-on-scroll%">
+			<mk-switch v-model="$store.state.settings.fetchOnScroll" @change="onChangeFetchOnScroll" text="%i18n:@fetch-on-scroll%">
 				<span>%i18n:@fetch-on-scroll-desc%</span>
 			</mk-switch>
 			<mk-switch v-model="autoPopout" text="%i18n:@auto-popout%">
@@ -41,14 +41,14 @@
 			</div>
 			<div class="div">
 				<mk-switch v-model="darkmode" text="%i18n:@dark-mode%"/>
-				<mk-switch v-model="clientSettings.circleIcons" @change="onChangeCircleIcons" text="%i18n:@circle-icons%"/>
-				<mk-switch v-model="clientSettings.gradientWindowHeader" @change="onChangeGradientWindowHeader" text="%i18n:@gradient-window-header%"/>
+				<mk-switch v-model="$store.state.settings.circleIcons" @change="onChangeCircleIcons" text="%i18n:@circle-icons%"/>
+				<mk-switch v-model="$store.state.settings.gradientWindowHeader" @change="onChangeGradientWindowHeader" text="%i18n:@gradient-window-header%"/>
 			</div>
-			<mk-switch v-model="clientSettings.showPostFormOnTopOfTl" @change="onChangeShowPostFormOnTopOfTl" text="%i18n:@post-form-on-timeline%"/>
-			<mk-switch v-model="clientSettings.showReplyTarget" @change="onChangeShowReplyTarget" text="%i18n:@show-reply-target%"/>
-			<mk-switch v-model="clientSettings.showMyRenotes" @change="onChangeShowMyRenotes" text="%i18n:@show-my-renotes%"/>
-			<mk-switch v-model="clientSettings.showRenotedMyNotes" @change="onChangeShowRenotedMyNotes" text="%i18n:@show-renoted-my-notes%"/>
-			<mk-switch v-model="clientSettings.showMaps" @change="onChangeShowMaps" text="%i18n:@show-maps%">
+			<mk-switch v-model="$store.state.settings.showPostFormOnTopOfTl" @change="onChangeShowPostFormOnTopOfTl" text="%i18n:@post-form-on-timeline%"/>
+			<mk-switch v-model="$store.state.settings.showReplyTarget" @change="onChangeShowReplyTarget" text="%i18n:@show-reply-target%"/>
+			<mk-switch v-model="$store.state.settings.showMyRenotes" @change="onChangeShowMyRenotes" text="%i18n:@show-my-renotes%"/>
+			<mk-switch v-model="$store.state.settings.showRenotedMyNotes" @change="onChangeShowRenotedMyNotes" text="%i18n:@show-renoted-my-notes%"/>
+			<mk-switch v-model="$store.state.settings.showMaps" @change="onChangeShowMaps" text="%i18n:@show-maps%">
 				<span>%i18n:@show-maps-desc%</span>
 			</mk-switch>
 		</section>
@@ -72,7 +72,7 @@
 
 		<section class="web" v-show="page == 'web'">
 			<h1>%i18n:@mobile%</h1>
-			<mk-switch v-model="clientSettings.disableViaMobile" @change="onChangeDisableViaMobile" text="%i18n:@disable-via-mobile%"/>
+			<mk-switch v-model="$store.state.settings.disableViaMobile" @change="onChangeDisableViaMobile" text="%i18n:@disable-via-mobile%"/>
 		</section>
 
 		<section class="web" v-show="page == 'web'">
@@ -100,7 +100,7 @@
 
 		<section class="notification" v-show="page == 'notification'">
 			<h1>%i18n:@notification%</h1>
-			<mk-switch v-model="os.i.settings.autoWatch" @change="onChangeAutoWatch" text="%i18n:@auto-watch%">
+			<mk-switch v-model="$store.state.i.settings.autoWatch" @change="onChangeAutoWatch" text="%i18n:@auto-watch%">
 				<span>%i18n:@auto-watch-desc%</span>
 			</mk-switch>
 		</section>
diff --git a/src/client/app/desktop/views/components/sub-note-content.vue b/src/client/app/desktop/views/components/sub-note-content.vue
index 03b634b0f..8aa32cec7 100644
--- a/src/client/app/desktop/views/components/sub-note-content.vue
+++ b/src/client/app/desktop/views/components/sub-note-content.vue
@@ -3,7 +3,7 @@
 	<div class="body">
 		<span v-if="note.isHidden" style="opacity: 0.5">%i18n:@hidden%</span>
 		<a class="reply" v-if="note.replyId">%fa:reply%</a>
-		<mk-note-html :text="note.text" :i="os.i"/>
+		<mk-note-html :text="note.text" :i="$store.state.i"/>
 		<a class="rp" v-if="note.renoteId" :href="`/note:${note.renoteId}`">RP: ...</a>
 	</div>
 	<details v-if="note.media.length > 0">
diff --git a/src/client/app/desktop/views/components/timeline.core.vue b/src/client/app/desktop/views/components/timeline.core.vue
index 3fcec86e4..44d5967db 100644
--- a/src/client/app/desktop/views/components/timeline.core.vue
+++ b/src/client/app/desktop/views/components/timeline.core.vue
@@ -40,7 +40,7 @@ export default Vue.extend({
 
 	computed: {
 		alone(): boolean {
-			return (this as any).os.i.followingCount == 0;
+			return this.$store.state.i.followingCount == 0;
 		},
 
 		stream(): any {
@@ -98,8 +98,8 @@ export default Vue.extend({
 				(this as any).api(this.endpoint, {
 					limit: fetchLimit + 1,
 					untilDate: this.date ? this.date.getTime() : undefined,
-					includeMyRenotes: (this as any).clientSettings.showMyRenotes,
-					includeRenotedMyNotes: (this as any).clientSettings.showRenotedMyNotes
+					includeMyRenotes: this.$store.state.settings.showMyRenotes,
+					includeRenotedMyNotes: this.$store.state.settings.showRenotedMyNotes
 				}).then(notes => {
 					if (notes.length == fetchLimit + 1) {
 						notes.pop();
@@ -120,8 +120,8 @@ export default Vue.extend({
 			const promise = (this as any).api(this.endpoint, {
 				limit: fetchLimit + 1,
 				untilId: (this.$refs.timeline as any).tail().id,
-				includeMyRenotes: (this as any).clientSettings.showMyRenotes,
-				includeRenotedMyNotes: (this as any).clientSettings.showRenotedMyNotes
+				includeMyRenotes: this.$store.state.settings.showMyRenotes,
+				includeRenotedMyNotes: this.$store.state.settings.showRenotedMyNotes
 			});
 
 			promise.then(notes => {
diff --git a/src/client/app/desktop/views/components/timeline.vue b/src/client/app/desktop/views/components/timeline.vue
index 27d329d13..0728b78aa 100644
--- a/src/client/app/desktop/views/components/timeline.vue
+++ b/src/client/app/desktop/views/components/timeline.vue
@@ -47,7 +47,7 @@ export default Vue.extend({
 			if (this.src == 'list') {
 				this.list = this.$store.state.device.tl.arg;
 			}
-		} else if ((this as any).os.i.followingCount == 0) {
+		} else if (this.$store.state.i.followingCount == 0) {
 			this.src = 'local';
 		}
 	},
diff --git a/src/client/app/desktop/views/components/ui.header.account.vue b/src/client/app/desktop/views/components/ui.header.account.vue
index f3f653949..8d26691f8 100644
--- a/src/client/app/desktop/views/components/ui.header.account.vue
+++ b/src/client/app/desktop/views/components/ui.header.account.vue
@@ -1,14 +1,14 @@
 <template>
 <div class="account">
 	<button class="header" :data-active="isOpen" @click="toggle">
-		<span class="username">{{ os.i.username }}<template v-if="!isOpen">%fa:angle-down%</template><template v-if="isOpen">%fa:angle-up%</template></span>
-		<mk-avatar class="avatar" :user="os.i"/>
+		<span class="username">{{ $store.state.i.username }}<template v-if="!isOpen">%fa:angle-down%</template><template v-if="isOpen">%fa:angle-up%</template></span>
+		<mk-avatar class="avatar" :user="$store.state.i"/>
 	</button>
 	<transition name="zoom-in-top">
 		<div class="menu" v-if="isOpen">
 			<ul>
 				<li>
-					<router-link :to="`/@${ os.i.username }`">%fa:user%<span>%i18n:@profile%</span>%fa:angle-right%</router-link>
+					<router-link :to="`/@${ $store.state.i.username }`">%fa:user%<span>%i18n:@profile%</span>%fa:angle-right%</router-link>
 				</li>
 				<li @click="drive">
 					<p>%fa:cloud%<span>%i18n:@drive%</span>%fa:angle-right%</p>
diff --git a/src/client/app/desktop/views/components/ui.header.nav.vue b/src/client/app/desktop/views/components/ui.header.nav.vue
index 0800d96eb..201b04b03 100644
--- a/src/client/app/desktop/views/components/ui.header.nav.vue
+++ b/src/client/app/desktop/views/components/ui.header.nav.vue
@@ -1,7 +1,7 @@
 <template>
 <div class="nav">
 	<ul>
-		<template v-if="os.isSignedIn">
+		<template v-if="$store.getters.isSignedIn">
 			<li class="home" :class="{ active: $route.name == 'index' }">
 				<router-link to="/">
 					%fa:home%
@@ -42,7 +42,7 @@ export default Vue.extend({
 		};
 	},
 	mounted() {
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection = (this as any).os.stream.getConnection();
 			this.connectionId = (this as any).os.stream.use();
 
@@ -60,7 +60,7 @@ export default Vue.extend({
 		}
 	},
 	beforeDestroy() {
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection.off('read_all_messaging_messages', this.onReadAllMessagingMessages);
 			this.connection.off('unread_messaging_message', this.onUnreadMessagingMessage);
 			this.connection.off('othello_invited', this.onOthelloInvited);
diff --git a/src/client/app/desktop/views/components/ui.header.notifications.vue b/src/client/app/desktop/views/components/ui.header.notifications.vue
index ea814dd7a..9eaaa62c6 100644
--- a/src/client/app/desktop/views/components/ui.header.notifications.vue
+++ b/src/client/app/desktop/views/components/ui.header.notifications.vue
@@ -23,7 +23,7 @@ export default Vue.extend({
 		};
 	},
 	mounted() {
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection = (this as any).os.stream.getConnection();
 			this.connectionId = (this as any).os.stream.use();
 
@@ -39,7 +39,7 @@ export default Vue.extend({
 		}
 	},
 	beforeDestroy() {
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection.off('read_all_notifications', this.onReadAllNotifications);
 			this.connection.off('unread_notification', this.onUnreadNotification);
 			(this as any).os.stream.dispose(this.connectionId);
diff --git a/src/client/app/desktop/views/components/ui.header.vue b/src/client/app/desktop/views/components/ui.header.vue
index 7729575b5..34464bf4b 100644
--- a/src/client/app/desktop/views/components/ui.header.vue
+++ b/src/client/app/desktop/views/components/ui.header.vue
@@ -4,16 +4,16 @@
 	<div class="main" ref="main">
 		<div class="backdrop"></div>
 		<div class="main">
-			<p ref="welcomeback" v-if="os.isSignedIn">おかえりなさい、<b>{{ os.i | userName }}</b>さん</p>
+			<p ref="welcomeback" v-if="$store.getters.isSignedIn">おかえりなさい、<b>{{ $store.state.i | userName }}</b>さん</p>
 			<div class="container" ref="mainContainer">
 				<div class="left">
 					<x-nav/>
 				</div>
 				<div class="right">
 					<x-search/>
-					<x-account v-if="os.isSignedIn"/>
-					<x-notifications v-if="os.isSignedIn"/>
-					<x-post v-if="os.isSignedIn"/>
+					<x-account v-if="$store.getters.isSignedIn"/>
+					<x-notifications v-if="$store.getters.isSignedIn"/>
+					<x-post v-if="$store.getters.isSignedIn"/>
 					<x-clock/>
 				</div>
 			</div>
@@ -45,11 +45,11 @@ export default Vue.extend({
 	mounted() {
 		this.$store.commit('setUiHeaderHeight', 48);
 
-		if ((this as any).os.isSignedIn) {
-			const ago = (new Date().getTime() - new Date((this as any).os.i.lastUsedAt).getTime()) / 1000;
+		if (this.$store.getters.isSignedIn) {
+			const ago = (new Date().getTime() - new Date(this.$store.state.i.lastUsedAt).getTime()) / 1000;
 			const isHisasiburi = ago >= 3600;
-			(this as any).os.i.lastUsedAt = new Date();
-			(this as any).os.bakeMe();
+			this.$store.state.i.lastUsedAt = new Date();
+
 			if (isHisasiburi) {
 				(this.$refs.welcomeback as any).style.display = 'block';
 				(this.$refs.main as any).style.overflow = 'hidden';
diff --git a/src/client/app/desktop/views/components/ui.vue b/src/client/app/desktop/views/components/ui.vue
index 87f932ff1..b6dd22c1f 100644
--- a/src/client/app/desktop/views/components/ui.vue
+++ b/src/client/app/desktop/views/components/ui.vue
@@ -4,7 +4,7 @@
 	<div class="content">
 		<slot></slot>
 	</div>
-	<mk-stream-indicator v-if="os.isSignedIn"/>
+	<mk-stream-indicator v-if="$store.getters.isSignedIn"/>
 </div>
 </template>
 
diff --git a/src/client/app/desktop/views/components/user-list-timeline.vue b/src/client/app/desktop/views/components/user-list-timeline.vue
index 4f14da70f..03ac81a4a 100644
--- a/src/client/app/desktop/views/components/user-list-timeline.vue
+++ b/src/client/app/desktop/views/components/user-list-timeline.vue
@@ -32,7 +32,7 @@ export default Vue.extend({
 	methods: {
 		init() {
 			if (this.connection) this.connection.close();
-			this.connection = new UserListStream((this as any).os, (this as any).os.i, this.list.id);
+			this.connection = new UserListStream((this as any).os, this.$store.state.i, this.list.id);
 			this.connection.on('note', this.onNote);
 			this.connection.on('userAdded', this.onUserAdded);
 			this.connection.on('userRemoved', this.onUserRemoved);
@@ -46,8 +46,8 @@ export default Vue.extend({
 				(this as any).api('notes/user-list-timeline', {
 					listId: this.list.id,
 					limit: fetchLimit + 1,
-					includeMyRenotes: (this as any).clientSettings.showMyRenotes,
-					includeRenotedMyNotes: (this as any).clientSettings.showRenotedMyNotes
+					includeMyRenotes: this.$store.state.settings.showMyRenotes,
+					includeRenotedMyNotes: this.$store.state.settings.showRenotedMyNotes
 				}).then(notes => {
 					if (notes.length == fetchLimit + 1) {
 						notes.pop();
@@ -66,8 +66,8 @@ export default Vue.extend({
 				listId: this.list.id,
 				limit: fetchLimit + 1,
 				untilId: (this.$refs.timeline as any).tail().id,
-				includeMyRenotes: (this as any).clientSettings.showMyRenotes,
-				includeRenotedMyNotes: (this as any).clientSettings.showRenotedMyNotes
+				includeMyRenotes: this.$store.state.settings.showMyRenotes,
+				includeRenotedMyNotes: this.$store.state.settings.showRenotedMyNotes
 			});
 
 			promise.then(notes => {
diff --git a/src/client/app/desktop/views/components/user-preview.vue b/src/client/app/desktop/views/components/user-preview.vue
index b8854a803..788881ead 100644
--- a/src/client/app/desktop/views/components/user-preview.vue
+++ b/src/client/app/desktop/views/components/user-preview.vue
@@ -19,7 +19,7 @@
 				<p>%i18n:@followers%</p><a>{{ u.followersCount }}</a>
 			</div>
 		</div>
-		<mk-follow-button v-if="os.isSignedIn && user.id != os.i.id" :user="u"/>
+		<mk-follow-button v-if="$store.getters.isSignedIn && user.id != $store.state.i.id" :user="u"/>
 	</template>
 </div>
 </template>
diff --git a/src/client/app/desktop/views/components/users-list.vue b/src/client/app/desktop/views/components/users-list.vue
index 1ed5c33b1..0423db8ed 100644
--- a/src/client/app/desktop/views/components/users-list.vue
+++ b/src/client/app/desktop/views/components/users-list.vue
@@ -3,7 +3,7 @@
 	<nav>
 		<div>
 			<span :data-active="mode == 'all'" @click="mode = 'all'">%i18n:@all%<span>{{ count }}</span></span>
-			<span v-if="os.isSignedIn && youKnowCount" :data-active="mode == 'iknow'" @click="mode = 'iknow'">%i18n:@iknow%<span>{{ youKnowCount }}</span></span>
+			<span v-if="$store.getters.isSignedIn && youKnowCount" :data-active="mode == 'iknow'" @click="mode = 'iknow'">%i18n:@iknow%<span>{{ youKnowCount }}</span></span>
 		</div>
 	</nav>
 	<div class="users" v-if="!fetching && users.length != 0">
diff --git a/src/client/app/desktop/views/components/widget-container.vue b/src/client/app/desktop/views/components/widget-container.vue
index ab8327d39..488e9cb24 100644
--- a/src/client/app/desktop/views/components/widget-container.vue
+++ b/src/client/app/desktop/views/components/widget-container.vue
@@ -23,9 +23,9 @@ export default Vue.extend({
 	},
 	computed: {
 		withGradient(): boolean {
-			return (this as any).os.isSignedIn
-				? (this as any).clientSettings.gradientWindowHeader != null
-					? (this as any).clientSettings.gradientWindowHeader
+			return this.$store.getters.isSignedIn
+				? this.$store.state.settings.gradientWindowHeader != null
+					? this.$store.state.settings.gradientWindowHeader
 					: false
 				: false;
 		}
diff --git a/src/client/app/desktop/views/components/window.vue b/src/client/app/desktop/views/components/window.vue
index ac06ac8e5..e4753f55d 100644
--- a/src/client/app/desktop/views/components/window.vue
+++ b/src/client/app/desktop/views/components/window.vue
@@ -4,7 +4,7 @@
 	<div class="main" ref="main" tabindex="-1" :data-is-modal="isModal" @mousedown="onBodyMousedown" @keydown="onKeydown" :style="{ width, height }">
 		<div class="body">
 			<header ref="header"
-				:class="{ withGradient: clientSettings.gradientWindowHeader }"
+				:class="{ withGradient: $store.state.settings.gradientWindowHeader }"
 				@contextmenu.prevent="() => {}" @mousedown.prevent="onHeaderMousedown"
 			>
 				<h1><slot name="header"></slot></h1>
@@ -95,7 +95,7 @@ export default Vue.extend({
 	},
 
 	created() {
-		if ((this as any).os.store.state.device.autoPopout && this.popoutUrl) {
+		if (this.$store.state.device.autoPopout && this.popoutUrl) {
 			this.popout();
 			this.preventMount = true;
 		} else {
diff --git a/src/client/app/desktop/views/pages/index.vue b/src/client/app/desktop/views/pages/index.vue
index 0ea47d913..5d11fc542 100644
--- a/src/client/app/desktop/views/pages/index.vue
+++ b/src/client/app/desktop/views/pages/index.vue
@@ -1,5 +1,5 @@
 <template>
-<component :is="os.isSignedIn ? 'home' : 'welcome'"></component>
+<component :is="$store.getters.isSignedIn ? 'home' : 'welcome'"></component>
 </template>
 
 <script lang="ts">
diff --git a/src/client/app/desktop/views/pages/user/user.header.vue b/src/client/app/desktop/views/pages/user/user.header.vue
index 73af3a4a4..44910bc7f 100644
--- a/src/client/app/desktop/views/pages/user/user.header.vue
+++ b/src/client/app/desktop/views/pages/user/user.header.vue
@@ -63,7 +63,7 @@ export default Vue.extend({
 		},
 
 		onBannerClick() {
-			if (!(this as any).os.isSignedIn || (this as any).os.i.id != this.user.id) return;
+			if (!this.$store.getters.isSignedIn || this.$store.state.i.id != this.user.id) return;
 
 			(this as any).apis.updateBanner().then(i => {
 				this.user.bannerUrl = i.bannerUrl;
diff --git a/src/client/app/desktop/views/pages/user/user.home.vue b/src/client/app/desktop/views/pages/user/user.home.vue
index 6b242a612..afaf97dc9 100644
--- a/src/client/app/desktop/views/pages/user/user.home.vue
+++ b/src/client/app/desktop/views/pages/user/user.home.vue
@@ -4,7 +4,7 @@
 		<div ref="left">
 			<x-profile :user="user"/>
 			<x-photos :user="user"/>
-			<x-followers-you-know v-if="os.isSignedIn && os.i.id != user.id" :user="user"/>
+			<x-followers-you-know v-if="$store.getters.isSignedIn && $store.state.i.id != user.id" :user="user"/>
 			<p v-if="user.host === null">%i18n:@last-used-at%: <b><mk-time :time="user.lastUsedAt"/></b></p>
 		</div>
 	</div>
diff --git a/src/client/app/desktop/views/pages/user/user.profile.vue b/src/client/app/desktop/views/pages/user/user.profile.vue
index 29e49f36a..5aa08f7c8 100644
--- a/src/client/app/desktop/views/pages/user/user.profile.vue
+++ b/src/client/app/desktop/views/pages/user/user.profile.vue
@@ -1,6 +1,6 @@
 <template>
 <div class="profile">
-	<div class="friend-form" v-if="os.isSignedIn && os.i.id != user.id">
+	<div class="friend-form" v-if="$store.getters.isSignedIn && $store.state.i.id != user.id">
 		<mk-follow-button :user="user" size="big"/>
 		<p class="followed" v-if="user.isFollowed">%i18n:@follows-you%</p>
 		<p class="stalk" v-if="user.isFollowing">
diff --git a/src/client/app/desktop/views/widgets/activity.vue b/src/client/app/desktop/views/widgets/activity.vue
index 1be87f590..73c6d0ef6 100644
--- a/src/client/app/desktop/views/widgets/activity.vue
+++ b/src/client/app/desktop/views/widgets/activity.vue
@@ -2,7 +2,7 @@
 <mk-activity
 	:design="props.design"
 	:init-view="props.view"
-	:user="os.i"
+	:user="$store.state.i"
 	@view-changed="viewChanged"/>
 </template>
 
diff --git a/src/client/app/desktop/views/widgets/profile.vue b/src/client/app/desktop/views/widgets/profile.vue
index 5af5b88e2..7b0fea372 100644
--- a/src/client/app/desktop/views/widgets/profile.vue
+++ b/src/client/app/desktop/views/widgets/profile.vue
@@ -4,16 +4,16 @@
 	:data-melt="props.design == 2"
 >
 	<div class="banner"
-		:style="os.i.bannerUrl ? `background-image: url(${os.i.bannerUrl}?thumbnail&size=256)` : ''"
+		:style="$store.state.i.bannerUrl ? `background-image: url(${$store.state.i.bannerUrl}?thumbnail&size=256)` : ''"
 		title="%i18n:@update-banner%"
 		@click="os.apis.updateBanner"
 	></div>
-	<mk-avatar class="avatar" :user="os.i"
+	<mk-avatar class="avatar" :user="$store.state.i"
 		@click="os.apis.updateAvatar"
 		title="%i18n:@update-avatar%"
 	/>
-	<router-link class="name" :to="os.i | userPage">{{ os.i | userName }}</router-link>
-	<p class="username">@{{ os.i | acct }}</p>
+	<router-link class="name" :to="$store.state.i | userPage">{{ $store.state.i | userName }}</router-link>
+	<p class="username">@{{ $store.state.i | acct }}</p>
 </div>
 </template>
 
diff --git a/src/client/app/init.ts b/src/client/app/init.ts
index 560ab1a09..58013ec5a 100644
--- a/src/client/app/init.ts
+++ b/src/client/app/init.ts
@@ -143,8 +143,7 @@ export default (callback: (launch: (router: VueRouter, api?: (os: MiOS) => API)
 					return {
 						os,
 						api: os.api,
-						apis: os.apis,
-						clientSettings: os.store.state.settings
+						apis: os.apis
 					};
 				}
 			});
diff --git a/src/client/app/mios.ts b/src/client/app/mios.ts
index a5a38a541..a8da5ddb5 100644
--- a/src/client/app/mios.ts
+++ b/src/client/app/mios.ts
@@ -1,10 +1,9 @@
 import Vue from 'vue';
 import { EventEmitter } from 'eventemitter3';
-import * as merge from 'object-assign-deep';
 import * as uuid from 'uuid';
 
 import initStore from './store';
-import { hostname, apiUrl, swPublickey, version, lang, googleMapsApiKey } from './config';
+import { apiUrl, swPublickey, version, lang, googleMapsApiKey } from './config';
 import Progress from './common/scripts/loading';
 import Connection from './common/scripts/streaming/stream';
 import { HomeStreamManager } from './common/scripts/streaming/home';
@@ -82,18 +81,6 @@ export default class MiOS extends EventEmitter {
 		return w;
 	}
 
-	/**
-	 * A signing user
-	 */
-	public i: { [x: string]: any };
-
-	/**
-	 * Whether signed in
-	 */
-	public get isSignedIn() {
-		return this.i != null;
-	}
-
 	/**
 	 * Whether is debug mode
 	 */
@@ -218,15 +205,8 @@ export default class MiOS extends EventEmitter {
 		console.error.apply(null, args);
 	}
 
-	public bakeMe() {
-		// ローカルストレージにキャッシュ
-		localStorage.setItem('me', JSON.stringify(this.i));
-	}
-
 	public signout() {
-		localStorage.removeItem('me');
-		localStorage.removeItem('settings');
-		document.cookie = `i=; domain=${hostname}; expires=Thu, 01 Jan 1970 00:00:01 GMT;`;
+		this.store.dispatch('logout');
 		location.href = '/';
 	}
 
@@ -242,14 +222,14 @@ export default class MiOS extends EventEmitter {
 
 		this.once('signedin', () => {
 			// Init home stream manager
-			this.stream = new HomeStreamManager(this, this.i);
+			this.stream = new HomeStreamManager(this, this.store.state.i);
 
 			// Init other stream manager
-			this.streams.localTimelineStream = new LocalTimelineStreamManager(this, this.i);
-			this.streams.globalTimelineStream = new GlobalTimelineStreamManager(this, this.i);
-			this.streams.driveStream = new DriveStreamManager(this, this.i);
-			this.streams.messagingIndexStream = new MessagingIndexStreamManager(this, this.i);
-			this.streams.othelloStream = new OthelloStreamManager(this, this.i);
+			this.streams.localTimelineStream = new LocalTimelineStreamManager(this, this.store.state.i);
+			this.streams.globalTimelineStream = new GlobalTimelineStreamManager(this, this.store.state.i);
+			this.streams.driveStream = new DriveStreamManager(this, this.store.state.i);
+			this.streams.messagingIndexStream = new MessagingIndexStreamManager(this, this.store.state.i);
+			this.streams.othelloStream = new OthelloStreamManager(this, this.store.state.i);
 		});
 		//#endregion
 
@@ -300,51 +280,29 @@ export default class MiOS extends EventEmitter {
 		};
 
 		// フェッチが完了したとき
-		const fetched = me => {
-			this.i = me;
-
-			// ローカルストレージにキャッシュ
-			this.bakeMe();
-
+		const fetched = () => {
 			this.emit('signedin');
 
 			// Finish init
 			callback();
 
-			//#region Note
-
 			// Init service worker
 			if (this.shouldRegisterSw) this.registerSw();
-
-			//#endregion
 		};
 
-		// Get cached account data
-		const cachedMe = JSON.parse(localStorage.getItem('me'));
-
-		//#region キャッシュされた設定を復元
-		const cachedSettings = JSON.parse(localStorage.getItem('settings'));
-
-		if (cachedSettings) {
-			this.store.dispatch('settings/merge', cachedSettings);
-		}
-		//#endregion
-
 		// キャッシュがあったとき
-		if (cachedMe) {
-			if (cachedMe.token == null) {
+		if (this.store.state.i != null) {
+			if (this.store.state.i.token == null) {
 				this.signout();
 				return;
 			}
 
 			// とりあえずキャッシュされたデータでお茶を濁して(?)おいて、
-			fetched(cachedMe);
+			fetched();
 
 			// 後から新鮮なデータをフェッチ
-			fetchme(cachedMe.token, freshData => {
-				merge(cachedMe, freshData);
-
-				this.store.dispatch('settings/merge', freshData.clientSettings);
+			fetchme(this.store.state.i.token, freshData => {
+				this.store.dispatch('mergeMe', freshData);
 			});
 		} else {
 			// Get token from cookie
@@ -352,9 +310,8 @@ export default class MiOS extends EventEmitter {
 
 			fetchme(i, me => {
 				if (me) {
-					this.store.dispatch('settings/merge', me.clientSettings);
-
-					fetched(me);
+					this.store.dispatch('login', me);
+					fetched();
 				} else {
 					// Finish init
 					callback();
@@ -375,7 +332,7 @@ export default class MiOS extends EventEmitter {
 		if (!isSwSupported) return;
 
 		// Reject when not signed in to Misskey
-		if (!this.isSignedIn) return;
+		if (!this.store.getters.isSignedIn) return;
 
 		// When service worker activated
 		navigator.serviceWorker.ready.then(registration => {
@@ -484,7 +441,7 @@ export default class MiOS extends EventEmitter {
 				});
 			} else {
 				// Append a credential
-				if (this.isSignedIn) (data as any).i = this.i.token;
+				if (this.store.getters.isSignedIn) (data as any).i = this.store.state.i.token;
 
 				const req = {
 					id: uuid(),
diff --git a/src/client/app/mobile/views/components/note-detail.vue b/src/client/app/mobile/views/components/note-detail.vue
index 244dbb6c0..eb934431d 100644
--- a/src/client/app/mobile/views/components/note-detail.vue
+++ b/src/client/app/mobile/views/components/note-detail.vue
@@ -31,7 +31,7 @@
 		<div class="body">
 			<div class="text">
 				<span v-if="p.isHidden" style="opacity: 0.5">(この投稿は非公開です)</span>
-				<mk-note-html v-if="p.text" :text="p.text" :i="os.i"/>
+				<mk-note-html v-if="p.text" :text="p.text" :i="$store.state.i"/>
 			</div>
 			<div class="tags" v-if="p.tags && p.tags.length > 0">
 				<router-link v-for="tag in p.tags" :key="tag" :to="`/search?q=#${tag}`">{{ tag }}</router-link>
@@ -147,7 +147,7 @@ export default Vue.extend({
 
 		// Draw map
 		if (this.p.geo) {
-			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).clientSettings.showMaps : true;
+			const shouldShowMap = this.$store.getters.isSignedIn ? this.$store.state.settings.showMaps : true;
 			if (shouldShowMap) {
 				(this as any).os.getGoogleMaps().then(maps => {
 					const uluru = new maps.LatLng(this.p.geo.coordinates[1], this.p.geo.coordinates[0]);
diff --git a/src/client/app/mobile/views/components/note.vue b/src/client/app/mobile/views/components/note.vue
index 2004263d2..42d3ffe40 100644
--- a/src/client/app/mobile/views/components/note.vue
+++ b/src/client/app/mobile/views/components/note.vue
@@ -1,6 +1,6 @@
 <template>
 <div class="note" :class="{ renote: isRenote, smart: $store.state.device.postStyle == 'smart' }">
-	<div class="reply-to" v-if="p.reply && (!os.isSignedIn || clientSettings.showReplyTarget)">
+	<div class="reply-to" v-if="p.reply && (!$store.getters.isSignedIn || $store.state.settings.showReplyTarget)">
 		<x-sub :note="p.reply"/>
 	</div>
 	<div class="renote" v-if="isRenote">
@@ -43,7 +43,7 @@
 					<div class="text">
 						<span v-if="p.isHidden" style="opacity: 0.5">(この投稿は非公開です)</span>
 						<a class="reply" v-if="p.reply">%fa:reply%</a>
-						<mk-note-html v-if="p.text && !canHideText(p)" :text="p.text" :i="os.i" :class="$style.text"/>
+						<mk-note-html v-if="p.text && !canHideText(p)" :text="p.text" :i="$store.state.i" :class="$style.text"/>
 						<a class="rp" v-if="p.renote != null">RP:</a>
 					</div>
 					<div class="media" v-if="p.media.length > 0">
@@ -141,7 +141,7 @@ export default Vue.extend({
 	},
 
 	created() {
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection = (this as any).os.stream.getConnection();
 			this.connectionId = (this as any).os.stream.use();
 		}
@@ -150,13 +150,13 @@ export default Vue.extend({
 	mounted() {
 		this.capture(true);
 
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection.on('_connected_', this.onStreamConnected);
 		}
 
 		// Draw map
 		if (this.p.geo) {
-			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).clientSettings.showMaps : true;
+			const shouldShowMap = this.$store.getters.isSignedIn ? this.$store.state.settings.showMaps : true;
 			if (shouldShowMap) {
 				(this as any).os.getGoogleMaps().then(maps => {
 					const uluru = new maps.LatLng(this.p.geo.coordinates[1], this.p.geo.coordinates[0]);
@@ -176,7 +176,7 @@ export default Vue.extend({
 	beforeDestroy() {
 		this.decapture(true);
 
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection.off('_connected_', this.onStreamConnected);
 			(this as any).os.stream.dispose(this.connectionId);
 		}
@@ -186,7 +186,7 @@ export default Vue.extend({
 		canHideText,
 
 		capture(withHandler = false) {
-			if ((this as any).os.isSignedIn) {
+			if (this.$store.getters.isSignedIn) {
 				this.connection.send({
 					type: 'capture',
 					id: this.p.id
@@ -196,7 +196,7 @@ export default Vue.extend({
 		},
 
 		decapture(withHandler = false) {
-			if ((this as any).os.isSignedIn) {
+			if (this.$store.getters.isSignedIn) {
 				this.connection.send({
 					type: 'decapture',
 					id: this.p.id
diff --git a/src/client/app/mobile/views/components/notes.vue b/src/client/app/mobile/views/components/notes.vue
index e77698dea..fbba11166 100644
--- a/src/client/app/mobile/views/components/notes.vue
+++ b/src/client/app/mobile/views/components/notes.vue
@@ -121,24 +121,24 @@ export default Vue.extend({
 
 		prepend(note, silent = false) {
 			//#region 弾く
-			const isMyNote = note.userId == (this as any).os.i.id;
+			const isMyNote = note.userId == this.$store.state.i.id;
 			const isPureRenote = note.renoteId != null && note.text == null && note.mediaIds.length == 0 && note.poll == null;
 
-			if ((this as any).clientSettings.showMyRenotes === false) {
+			if (this.$store.state.settings.showMyRenotes === false) {
 				if (isMyNote && isPureRenote) {
 					return;
 				}
 			}
 
-			if ((this as any).clientSettings.showRenotedMyNotes === false) {
-				if (isPureRenote && (note.renote.userId == (this as any).os.i.id)) {
+			if (this.$store.state.settings.showRenotedMyNotes === false) {
+				if (isPureRenote && (note.renote.userId == this.$store.state.i.id)) {
 					return;
 				}
 			}
 			//#endregion
 
 			// 投稿が自分のものではないかつ、タブが非表示またはスクロール位置が最上部ではないならタイトルで通知
-			if ((document.hidden || !this.isScrollTop()) && note.userId !== (this as any).os.i.id) {
+			if ((document.hidden || !this.isScrollTop()) && note.userId !== this.$store.state.i.id) {
 				this.unreadCount++;
 				document.title = `(${this.unreadCount}) ${getNoteSummary(note)}`;
 			}
@@ -195,7 +195,7 @@ export default Vue.extend({
 				this.clearNotification();
 			}
 
-			if ((this as any).clientSettings.fetchOnScroll !== false) {
+			if (this.$store.state.settings.fetchOnScroll !== false) {
 				// 親要素が display none だったら弾く
 				// https://github.com/syuilo/misskey/issues/1569
 				// http://d.hatena.ne.jp/favril/20091105/1257403319
diff --git a/src/client/app/mobile/views/components/post-form.vue b/src/client/app/mobile/views/components/post-form.vue
index 264eb0844..f999988c6 100644
--- a/src/client/app/mobile/views/components/post-form.vue
+++ b/src/client/app/mobile/views/components/post-form.vue
@@ -86,7 +86,7 @@ export default Vue.extend({
 				const mention = x.host ? `@${x.username}@${x.host}` : `@${x.username}`;
 
 				// 自分は除外
-				if (this.os.i.username == x.username && x.host == null) return;
+				if (this.$store.state.i.username == x.username && x.host == null) return;
 
 				// 重複は除外
 				if (this.text.indexOf(`${mention} `) != -1) return;
@@ -194,7 +194,7 @@ export default Vue.extend({
 
 		post() {
 			this.posting = true;
-			const viaMobile = (this as any).clientSettings.disableViaMobile !== true;
+			const viaMobile = this.$store.state.settings.disableViaMobile !== true;
 			(this as any).api('notes/create', {
 				text: this.text == '' ? undefined : this.text,
 				mediaIds: this.files.length > 0 ? this.files.map(f => f.id) : undefined,
diff --git a/src/client/app/mobile/views/components/sub-note-content.vue b/src/client/app/mobile/views/components/sub-note-content.vue
index cc50977a5..bb96d6514 100644
--- a/src/client/app/mobile/views/components/sub-note-content.vue
+++ b/src/client/app/mobile/views/components/sub-note-content.vue
@@ -3,7 +3,7 @@
 	<div class="body">
 		<span v-if="note.isHidden" style="opacity: 0.5">(この投稿は非公開です)</span>
 		<a class="reply" v-if="note.replyId">%fa:reply%</a>
-		<mk-note-html v-if="note.text" :text="note.text" :i="os.i"/>
+		<mk-note-html v-if="note.text" :text="note.text" :i="$store.state.i"/>
 		<a class="rp" v-if="note.renoteId">RP: ...</a>
 	</div>
 	<details v-if="note.media.length > 0">
diff --git a/src/client/app/mobile/views/components/ui.header.vue b/src/client/app/mobile/views/components/ui.header.vue
index a49462b15..09aa18f76 100644
--- a/src/client/app/mobile/views/components/ui.header.vue
+++ b/src/client/app/mobile/views/components/ui.header.vue
@@ -3,7 +3,7 @@
 	<mk-special-message/>
 	<div class="main" ref="main">
 		<div class="backdrop"></div>
-		<p ref="welcomeback" v-if="os.isSignedIn">おかえりなさい、<b>{{ os.i | userName }}</b>さん</p>
+		<p ref="welcomeback" v-if="$store.getters.isSignedIn">おかえりなさい、<b>{{ $store.state.i | userName }}</b>さん</p>
 		<div class="content" ref="mainContainer">
 			<button class="nav" @click="$parent.isDrawerOpening = true">%fa:bars%</button>
 			<template v-if="hasUnreadNotifications || hasUnreadMessagingMessages || hasGameInvitations">%fa:circle%</template>
@@ -35,7 +35,7 @@ export default Vue.extend({
 	mounted() {
 		this.$store.commit('setUiHeaderHeight', 48);
 
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection = (this as any).os.stream.getConnection();
 			this.connectionId = (this as any).os.stream.use();
 
@@ -60,10 +60,10 @@ export default Vue.extend({
 				}
 			});
 
-			const ago = (new Date().getTime() - new Date((this as any).os.i.lastUsedAt).getTime()) / 1000;
+			const ago = (new Date().getTime() - new Date(this.$store.state.i.lastUsedAt).getTime()) / 1000;
 			const isHisasiburi = ago >= 3600;
-			(this as any).os.i.lastUsedAt = new Date();
-			(this as any).os.bakeMe();
+			this.$store.state.i.lastUsedAt = new Date();
+
 			if (isHisasiburi) {
 				(this.$refs.welcomeback as any).style.display = 'block';
 				(this.$refs.main as any).style.overflow = 'hidden';
@@ -109,7 +109,7 @@ export default Vue.extend({
 		}
 	},
 	beforeDestroy() {
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection.off('read_all_notifications', this.onReadAllNotifications);
 			this.connection.off('unread_notification', this.onUnreadNotification);
 			this.connection.off('read_all_messaging_messages', this.onReadAllMessagingMessages);
diff --git a/src/client/app/mobile/views/components/ui.nav.vue b/src/client/app/mobile/views/components/ui.nav.vue
index aa469bd1c..5f0cc831c 100644
--- a/src/client/app/mobile/views/components/ui.nav.vue
+++ b/src/client/app/mobile/views/components/ui.nav.vue
@@ -9,9 +9,9 @@
 	</transition>
 	<transition name="nav">
 		<div class="body" v-if="isOpen">
-			<router-link class="me" v-if="os.isSignedIn" :to="`/@${os.i.username}`">
-				<img class="avatar" :src="`${os.i.avatarUrl}?thumbnail&size=128`" alt="avatar"/>
-				<p class="name">{{ os.i | userName }}</p>
+			<router-link class="me" v-if="$store.getters.isSignedIn" :to="`/@${$store.state.i.username}`">
+				<img class="avatar" :src="`${$store.state.i.avatarUrl}?thumbnail&size=128`" alt="avatar"/>
+				<p class="name">{{ $store.state.i | userName }}</p>
 			</router-link>
 			<div class="links">
 				<ul>
@@ -55,7 +55,7 @@ export default Vue.extend({
 		};
 	},
 	mounted() {
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection = (this as any).os.stream.getConnection();
 			this.connectionId = (this as any).os.stream.use();
 
@@ -82,7 +82,7 @@ export default Vue.extend({
 		}
 	},
 	beforeDestroy() {
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection.off('read_all_notifications', this.onReadAllNotifications);
 			this.connection.off('unread_notification', this.onUnreadNotification);
 			this.connection.off('read_all_messaging_messages', this.onReadAllMessagingMessages);
diff --git a/src/client/app/mobile/views/components/ui.vue b/src/client/app/mobile/views/components/ui.vue
index 325ce9d40..7e2d39f25 100644
--- a/src/client/app/mobile/views/components/ui.vue
+++ b/src/client/app/mobile/views/components/ui.vue
@@ -8,7 +8,7 @@
 	<div class="content">
 		<slot></slot>
 	</div>
-	<mk-stream-indicator v-if="os.isSignedIn"/>
+	<mk-stream-indicator v-if="$store.getters.isSignedIn"/>
 </div>
 </template>
 
@@ -32,7 +32,7 @@ export default Vue.extend({
 		};
 	},
 	mounted() {
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection = (this as any).os.stream.getConnection();
 			this.connectionId = (this as any).os.stream.use();
 
@@ -40,7 +40,7 @@ export default Vue.extend({
 		}
 	},
 	beforeDestroy() {
-		if ((this as any).os.isSignedIn) {
+		if (this.$store.getters.isSignedIn) {
 			this.connection.off('notification', this.onNotification);
 			(this as any).os.stream.dispose(this.connectionId);
 		}
diff --git a/src/client/app/mobile/views/components/user-list-timeline.vue b/src/client/app/mobile/views/components/user-list-timeline.vue
index 629151302..2c1564b7e 100644
--- a/src/client/app/mobile/views/components/user-list-timeline.vue
+++ b/src/client/app/mobile/views/components/user-list-timeline.vue
@@ -43,7 +43,7 @@ export default Vue.extend({
 	methods: {
 		init() {
 			if (this.connection) this.connection.close();
-			this.connection = new UserListStream((this as any).os, (this as any).os.i, this.list.id);
+			this.connection = new UserListStream((this as any).os, this.$store.state.i, this.list.id);
 			this.connection.on('note', this.onNote);
 			this.connection.on('userAdded', this.onUserAdded);
 			this.connection.on('userRemoved', this.onUserRemoved);
@@ -58,8 +58,8 @@ export default Vue.extend({
 				(this as any).api('notes/user-list-timeline', {
 					listId: this.list.id,
 					limit: fetchLimit + 1,
-					includeMyRenotes: (this as any).clientSettings.showMyRenotes,
-					includeRenotedMyNotes: (this as any).clientSettings.showRenotedMyNotes
+					includeMyRenotes: this.$store.state.settings.showMyRenotes,
+					includeRenotedMyNotes: this.$store.state.settings.showRenotedMyNotes
 				}).then(notes => {
 					if (notes.length == fetchLimit + 1) {
 						notes.pop();
@@ -81,8 +81,8 @@ export default Vue.extend({
 				listId: this.list.id,
 				limit: fetchLimit + 1,
 				untilId: (this.$refs.timeline as any).tail().id,
-				includeMyRenotes: (this as any).clientSettings.showMyRenotes,
-				includeRenotedMyNotes: (this as any).clientSettings.showRenotedMyNotes
+				includeMyRenotes: this.$store.state.settings.showMyRenotes,
+				includeRenotedMyNotes: this.$store.state.settings.showRenotedMyNotes
 			});
 
 			promise.then(notes => {
diff --git a/src/client/app/mobile/views/components/users-list.vue b/src/client/app/mobile/views/components/users-list.vue
index 617506745..a57b82129 100644
--- a/src/client/app/mobile/views/components/users-list.vue
+++ b/src/client/app/mobile/views/components/users-list.vue
@@ -2,7 +2,7 @@
 <div class="mk-users-list">
 	<nav>
 		<span :data-active="mode == 'all'" @click="mode = 'all'">%i18n:@all%<span>{{ count }}</span></span>
-		<span v-if="os.isSignedIn && youKnowCount" :data-active="mode == 'iknow'" @click="mode = 'iknow'">%i18n:@known%<span>{{ youKnowCount }}</span></span>
+		<span v-if="$store.getters.isSignedIn && youKnowCount" :data-active="mode == 'iknow'" @click="mode = 'iknow'">%i18n:@known%<span>{{ youKnowCount }}</span></span>
 	</nav>
 	<div class="users" v-if="!fetching && users.length != 0">
 		<mk-user-preview v-for="u in users" :user="u" :key="u.id"/>
diff --git a/src/client/app/mobile/views/pages/home.timeline.vue b/src/client/app/mobile/views/pages/home.timeline.vue
index 9ebce53de..364367b94 100644
--- a/src/client/app/mobile/views/pages/home.timeline.vue
+++ b/src/client/app/mobile/views/pages/home.timeline.vue
@@ -38,7 +38,7 @@ export default Vue.extend({
 
 	computed: {
 		alone(): boolean {
-			return (this as any).os.i.followingCount == 0;
+			return this.$store.state.i.followingCount == 0;
 		},
 
 		stream(): any {
@@ -92,8 +92,8 @@ export default Vue.extend({
 				(this as any).api(this.endpoint, {
 					limit: fetchLimit + 1,
 					untilDate: this.date ? this.date.getTime() : undefined,
-					includeMyRenotes: (this as any).clientSettings.showMyRenotes,
-					includeRenotedMyNotes: (this as any).clientSettings.showRenotedMyNotes
+					includeMyRenotes: this.$store.state.settings.showMyRenotes,
+					includeRenotedMyNotes: this.$store.state.settings.showRenotedMyNotes
 				}).then(notes => {
 					if (notes.length == fetchLimit + 1) {
 						notes.pop();
@@ -114,8 +114,8 @@ export default Vue.extend({
 			const promise = (this as any).api(this.endpoint, {
 				limit: fetchLimit + 1,
 				untilId: (this.$refs.timeline as any).tail().id,
-				includeMyRenotes: (this as any).clientSettings.showMyRenotes,
-				includeRenotedMyNotes: (this as any).clientSettings.showRenotedMyNotes
+				includeMyRenotes: this.$store.state.settings.showMyRenotes,
+				includeRenotedMyNotes: this.$store.state.settings.showRenotedMyNotes
 			});
 
 			promise.then(notes => {
diff --git a/src/client/app/mobile/views/pages/home.vue b/src/client/app/mobile/views/pages/home.vue
index 33579185e..c0c2ee8ab 100644
--- a/src/client/app/mobile/views/pages/home.vue
+++ b/src/client/app/mobile/views/pages/home.vue
@@ -87,7 +87,7 @@ export default Vue.extend({
 			if (this.src == 'list') {
 				this.list = this.$store.state.device.tl.arg;
 			}
-		} else if ((this as any).os.i.followingCount == 0) {
+		} else if (this.$store.state.i.followingCount == 0) {
 			this.src = 'local';
 		}
 	},
diff --git a/src/client/app/mobile/views/pages/index.vue b/src/client/app/mobile/views/pages/index.vue
index 0ea47d913..5d11fc542 100644
--- a/src/client/app/mobile/views/pages/index.vue
+++ b/src/client/app/mobile/views/pages/index.vue
@@ -1,5 +1,5 @@
 <template>
-<component :is="os.isSignedIn ? 'home' : 'welcome'"></component>
+<component :is="$store.getters.isSignedIn ? 'home' : 'welcome'"></component>
 </template>
 
 <script lang="ts">
diff --git a/src/client/app/mobile/views/pages/settings.vue b/src/client/app/mobile/views/pages/settings.vue
index 3bb25f88f..8da7a7663 100644
--- a/src/client/app/mobile/views/pages/settings.vue
+++ b/src/client/app/mobile/views/pages/settings.vue
@@ -17,22 +17,22 @@
 					</div>
 
 					<div>
-						<md-switch v-model="clientSettings.circleIcons" @change="onChangeCircleIcons">%i18n:@circle-icons%</md-switch>
+						<md-switch v-model="$store.state.settings.circleIcons" @change="onChangeCircleIcons">%i18n:@circle-icons%</md-switch>
 					</div>
 
 					<div>
 						<div class="md-body-2">%i18n:@timeline%</div>
 
 						<div>
-							<md-switch v-model="clientSettings.showReplyTarget" @change="onChangeShowReplyTarget">%i18n:@show-reply-target%</md-switch>
+							<md-switch v-model="$store.state.settings.showReplyTarget" @change="onChangeShowReplyTarget">%i18n:@show-reply-target%</md-switch>
 						</div>
 
 						<div>
-							<md-switch v-model="clientSettings.showMyRenotes" @change="onChangeShowMyRenotes">%i18n:@show-my-renotes%</md-switch>
+							<md-switch v-model="$store.state.settings.showMyRenotes" @change="onChangeShowMyRenotes">%i18n:@show-my-renotes%</md-switch>
 						</div>
 
 						<div>
-							<md-switch v-model="clientSettings.showRenotedMyNotes" @change="onChangeShowRenotedMyNotes">%i18n:@show-renoted-my-notes%</md-switch>
+							<md-switch v-model="$store.state.settings.showRenotedMyNotes" @change="onChangeShowRenotedMyNotes">%i18n:@show-renoted-my-notes%</md-switch>
 						</div>
 					</div>
 
@@ -52,11 +52,11 @@
 
 				<md-card-content>
 					<div>
-						<md-switch v-model="clientSettings.fetchOnScroll" @change="onChangeFetchOnScroll">%i18n:@fetch-on-scroll%</md-switch>
+						<md-switch v-model="$store.state.settings.fetchOnScroll" @change="onChangeFetchOnScroll">%i18n:@fetch-on-scroll%</md-switch>
 					</div>
 
 					<div>
-						<md-switch v-model="clientSettings.disableViaMobile" @change="onChangeDisableViaMobile">%i18n:@disable-via-mobile%</md-switch>
+						<md-switch v-model="$store.state.settings.disableViaMobile" @change="onChangeDisableViaMobile">%i18n:@disable-via-mobile%</md-switch>
 					</div>
 
 					<div>
@@ -64,7 +64,7 @@
 					</div>
 
 					<div>
-						<md-switch v-model="clientSettings.loadRemoteMedia" @change="onChangeLoadRemoteMedia">%i18n:@load-remote-media%</md-switch>
+						<md-switch v-model="$store.state.settings.loadRemoteMedia" @change="onChangeLoadRemoteMedia">%i18n:@load-remote-media%</md-switch>
 					</div>
 
 					<div>
@@ -100,11 +100,11 @@
 				</md-card-header>
 
 				<md-card-content>
-					<p class="account" v-if="os.i.twitter"><a :href="`https://twitter.com/${os.i.twitter.screenName}`" target="_blank">@{{ os.i.twitter.screenName }}</a></p>
+					<p class="account" v-if="$store.state.i.twitter"><a :href="`https://twitter.com/${$store.state.i.twitter.screenName}`" target="_blank">@{{ $store.state.i.twitter.screenName }}</a></p>
 					<p>
-						<a :href="`${apiUrl}/connect/twitter`" target="_blank">{{ os.i.twitter ? '%i18n:@twitter-reconnect%' : '%i18n:@twitter-connect%' }}</a>
-						<span v-if="os.i.twitter"> or </span>
-						<a :href="`${apiUrl}/disconnect/twitter`" target="_blank" v-if="os.i.twitter">%i18n:@twitter-disconnect%</a>
+						<a :href="`${apiUrl}/connect/twitter`" target="_blank">{{ $store.state.i.twitter ? '%i18n:@twitter-reconnect%' : '%i18n:@twitter-connect%' }}</a>
+						<span v-if="$store.state.i.twitter"> or </span>
+						<a :href="`${apiUrl}/disconnect/twitter`" target="_blank" v-if="$store.state.i.twitter">%i18n:@twitter-disconnect%</a>
 					</p>
 				</md-card-content>
 			</md-card>
@@ -156,7 +156,7 @@ export default Vue.extend({
 
 	computed: {
 		name(): string {
-			return Vue.filter('userName')((this as any).os.i);
+			return Vue.filter('userName')(this.$store.state.i);
 		},
 
 		darkmode: {
diff --git a/src/client/app/mobile/views/pages/settings/settings.profile.vue b/src/client/app/mobile/views/pages/settings/settings.profile.vue
index c16c44e13..f3444eb1f 100644
--- a/src/client/app/mobile/views/pages/settings/settings.profile.vue
+++ b/src/client/app/mobile/views/pages/settings/settings.profile.vue
@@ -82,15 +82,15 @@ export default Vue.extend({
 	},
 
 	created() {
-		this.name = (this as any).os.i.name || '';
-		this.username = (this as any).os.i.username;
-		this.location = (this as any).os.i.profile.location;
-		this.description = (this as any).os.i.description;
-		this.birthday = (this as any).os.i.profile.birthday;
-		this.avatarId = (this as any).os.i.avatarId;
-		this.bannerId = (this as any).os.i.bannerId;
-		this.isBot = (this as any).os.i.isBot;
-		this.isCat = (this as any).os.i.isCat;
+		this.name = this.$store.state.i.name || '';
+		this.username = this.$store.state.i.username;
+		this.location = this.$store.state.i.profile.location;
+		this.description = this.$store.state.i.description;
+		this.birthday = this.$store.state.i.profile.birthday;
+		this.avatarId = this.$store.state.i.avatarId;
+		this.bannerId = this.$store.state.i.bannerId;
+		this.isBot = this.$store.state.i.isBot;
+		this.isCat = this.$store.state.i.isCat;
 	},
 
 	methods: {
@@ -99,7 +99,7 @@ export default Vue.extend({
 
 			const data = new FormData();
 			data.append('file', file);
-			data.append('i', (this as any).os.i.token);
+			data.append('i', this.$store.state.i.token);
 
 			fetch(apiUrl + '/drive/files/create', {
 				method: 'POST',
@@ -121,7 +121,7 @@ export default Vue.extend({
 
 			const data = new FormData();
 			data.append('file', file);
-			data.append('i', (this as any).os.i.token);
+			data.append('i', this.$store.state.i.token);
 
 			fetch(apiUrl + '/drive/files/create', {
 				method: 'POST',
@@ -152,10 +152,10 @@ export default Vue.extend({
 				isCat: this.isCat
 			}).then(i => {
 				this.saving = false;
-				(this as any).os.i.avatarId = i.avatarId;
-				(this as any).os.i.avatarUrl = i.avatarUrl;
-				(this as any).os.i.bannerId = i.bannerId;
-				(this as any).os.i.bannerUrl = i.bannerUrl;
+				this.$store.state.i.avatarId = i.avatarId;
+				this.$store.state.i.avatarUrl = i.avatarUrl;
+				this.$store.state.i.bannerId = i.bannerId;
+				this.$store.state.i.bannerUrl = i.bannerUrl;
 
 				alert('%i18n:@saved%');
 			});
diff --git a/src/client/app/mobile/views/pages/user.vue b/src/client/app/mobile/views/pages/user.vue
index 84fd7eda0..b3b820650 100644
--- a/src/client/app/mobile/views/pages/user.vue
+++ b/src/client/app/mobile/views/pages/user.vue
@@ -11,7 +11,7 @@
 					<a class="avatar">
 						<img :src="user.avatarUrl" alt="avatar"/>
 					</a>
-					<mk-follow-button v-if="os.isSignedIn && os.i.id != user.id" :user="user"/>
+					<mk-follow-button v-if="$store.getters.isSignedIn && $store.state.i.id != user.id" :user="user"/>
 				</div>
 				<div class="title">
 					<h1>{{ user | userName }}</h1>
diff --git a/src/client/app/mobile/views/pages/user/home.vue b/src/client/app/mobile/views/pages/user/home.vue
index d02daf502..8b57276b1 100644
--- a/src/client/app/mobile/views/pages/user/home.vue
+++ b/src/client/app/mobile/views/pages/user/home.vue
@@ -25,7 +25,7 @@
 			<x-friends :user="user"/>
 		</div>
 	</section>
-	<section class="followers-you-know" v-if="os.isSignedIn && os.i.id !== user.id">
+	<section class="followers-you-know" v-if="$store.getters.isSignedIn && $store.state.i.id !== user.id">
 		<h2>%fa:users%%i18n:@followers-you-know%</h2>
 		<div>
 			<x-followers-you-know :user="user"/>
diff --git a/src/client/app/mobile/views/widgets/activity.vue b/src/client/app/mobile/views/widgets/activity.vue
index 7763be41f..85f925ced 100644
--- a/src/client/app/mobile/views/widgets/activity.vue
+++ b/src/client/app/mobile/views/widgets/activity.vue
@@ -3,7 +3,7 @@
 	<mk-widget-container :show-header="!props.compact">
 		<template slot="header">%fa:chart-bar%アクティビティ</template>
 		<div :class="$style.body">
-			<mk-activity :user="os.i"/>
+			<mk-activity :user="$store.state.i"/>
 		</div>
 	</mk-widget-container>
 </div>
diff --git a/src/client/app/mobile/views/widgets/profile.vue b/src/client/app/mobile/views/widgets/profile.vue
index 59c1ec7c0..a94f7e94b 100644
--- a/src/client/app/mobile/views/widgets/profile.vue
+++ b/src/client/app/mobile/views/widgets/profile.vue
@@ -2,13 +2,13 @@
 <div class="mkw-profile">
 	<mk-widget-container>
 		<div :class="$style.banner"
-			:style="os.i.bannerUrl ? `background-image: url(${os.i.bannerUrl}?thumbnail&size=256)` : ''"
+			:style="$store.state.i.bannerUrl ? `background-image: url(${$store.state.i.bannerUrl}?thumbnail&size=256)` : ''"
 		></div>
 		<img :class="$style.avatar"
-			:src="`${os.i.avatarUrl}?thumbnail&size=96`"
+			:src="`${$store.state.i.avatarUrl}?thumbnail&size=96`"
 			alt="avatar"
 		/>
-		<router-link :class="$style.name" :to="os.i | userPage">{{ os.i | userName }}</router-link>
+		<router-link :class="$style.name" :to="$store.state.i | userPage">{{ $store.state.i | userName }}</router-link>
 	</mk-widget-container>
 </div>
 </template>
diff --git a/src/client/app/store.ts b/src/client/app/store.ts
index e787b4146..c27ff0dfc 100644
--- a/src/client/app/store.ts
+++ b/src/client/app/store.ts
@@ -2,6 +2,7 @@ import Vuex from 'vuex';
 import createPersistedState from 'vuex-persistedstate';
 
 import MiOS from './mios';
+import { hostname } from './config';
 
 const defaultSettings = {
 	home: [],
@@ -33,23 +34,29 @@ const defaultDeviceSettings = {
 };
 
 export default (os: MiOS) => new Vuex.Store({
-	plugins: [store => {
-		store.subscribe((mutation, state) => {
-			if (mutation.type.startsWith('settings/')) {
-				localStorage.setItem('settings', JSON.stringify(state.settings));
-			}
-		});
-	}, createPersistedState({
-		paths: ['device'],
-		filter: mut => mut.type.startsWith('device/')
+	plugins: [createPersistedState({
+		paths: ['i', 'device', 'settings']
 	})],
 
 	state: {
+		i: null,
 		indicate: false,
 		uiHeaderHeight: 0
 	},
 
+	getters: {
+		isSignedIn: state => state.i != null
+	},
+
 	mutations: {
+		updateI(state, x) {
+			state.i = x;
+		},
+
+		updateIKeyValue(state, x) {
+			state.i[x.key] = x.value;
+		},
+
 		indicate(state, x) {
 			state.indicate = x;
 		},
@@ -59,6 +66,28 @@ export default (os: MiOS) => new Vuex.Store({
 		}
 	},
 
+	actions: {
+		login(ctx, i) {
+			ctx.commit('updateI', i);
+			ctx.dispatch('settings/merge', i.clientSettings);
+		},
+
+		logout(ctx) {
+			ctx.commit('updateI', null);
+			document.cookie = `i=; domain=${hostname}; expires=Thu, 01 Jan 1970 00:00:01 GMT;`;
+		},
+
+		mergeMe(ctx, me) {
+			Object.entries(me).forEach(([key, value]) => {
+				ctx.commit('updateIKeyValue', { key, value });
+			});
+
+			if (me.clientSettings) {
+				ctx.dispatch('settings/merge', me.clientSettings);
+			}
+		},
+	},
+
 	modules: {
 		device: {
 			namespaced: true,
@@ -134,7 +163,7 @@ export default (os: MiOS) => new Vuex.Store({
 				set(ctx, x) {
 					ctx.commit('set', x);
 
-					if (os.isSignedIn) {
+					if (ctx.rootGetters.isSignedIn) {
 						os.api('i/update_client_setting', {
 							name: x.key,
 							value: x.value