diff --git a/packages/client/src/pages/theme-editor.vue b/packages/client/src/pages/theme-editor.vue
index c4917e2270..80b8c7806c 100644
--- a/packages/client/src/pages/theme-editor.vue
+++ b/packages/client/src/pages/theme-editor.vue
@@ -2,7 +2,7 @@
 <MkSpacer :content-max="800" :margin-min="16" :margin-max="32">
 	<div class="cwepdizn _formRoot">
 		<FormFolder :default-open="true" class="_formBlock">
-			<template #label>{{ $ts.backgroundColor }}</template>
+			<template #label>{{ i18n.locale.backgroundColor }}</template>
 			<div class="cwepdizn-colors">
 				<div class="row">
 					<button v-for="color in bgColors.filter(x => x.kind === 'light')" :key="color.color" class="color _button" :class="{ active: theme.props.bg === color.color }" @click="setBgColor(color)">
@@ -18,7 +18,7 @@
 		</FormFolder>
 
 		<FormFolder :default-open="true" class="_formBlock">
-			<template #label>{{ $ts.accentColor }}</template>
+			<template #label>{{ i18n.locale.accentColor }}</template>
 			<div class="cwepdizn-colors">
 				<div class="row">
 					<button v-for="color in accentColors" :key="color" class="color rounded _button" :class="{ active: theme.props.accent === color }" @click="setAccentColor(color)">
@@ -29,7 +29,7 @@
 		</FormFolder>
 
 		<FormFolder :default-open="true" class="_formBlock">
-			<template #label>{{ $ts.textColor }}</template>
+			<template #label>{{ i18n.locale.textColor }}</template>
 			<div class="cwepdizn-colors">
 				<div class="row">
 					<button v-for="color in fgColors" :key="color" class="color char _button" :class="{ active: (theme.props.fg === color.forLight) || (theme.props.fg === color.forDark) }" @click="setFgColor(color)">
@@ -41,22 +41,22 @@
 
 		<FormFolder :default-open="false" class="_formBlock">
 			<template #icon><i class="fas fa-code"></i></template>
-			<template #label>{{ $ts.editCode }}</template>
+			<template #label>{{ i18n.locale.editCode }}</template>
 
 			<div class="_formRoot">
 				<FormTextarea v-model="themeCode" tall class="_formBlock">
-					<template #label>{{ $ts._theme.code }}</template>
+					<template #label>{{ i18n.locale._theme.code }}</template>
 				</FormTextarea>
-				<FormButton primary class="_formBlock" @click="applyThemeCode">{{ $ts.apply }}</FormButton>
+				<FormButton primary class="_formBlock" @click="applyThemeCode">{{ i18n.locale.apply }}</FormButton>
 			</div>
 		</FormFolder>
 
 		<FormFolder :default-open="false" class="_formBlock">
-			<template #label>{{ $ts.addDescription }}</template>
+			<template #label>{{ i18n.locale.addDescription }}</template>
 
 			<div class="_formRoot">
 				<FormTextarea v-model="description">
-					<template #label>{{ $ts._theme.description }}</template>
+					<template #label>{{ i18n.locale._theme.description }}</template>
 				</FormTextarea>
 			</div>
 		</FormFolder>
@@ -64,8 +64,8 @@
 </MkSpacer>
 </template>
 
-<script lang="ts">
-import { defineComponent } from 'vue';
+<script lang="ts" setup>
+import { watch } from 'vue';
 import { toUnicode } from 'punycode/';
 import * as tinycolor from 'tinycolor2';
 import { v4 as uuid} from 'uuid';
@@ -78,181 +78,147 @@ import FormFolder from '@/components/form/folder.vue';
 import { Theme, applyTheme, darkTheme, lightTheme } from '@/scripts/theme';
 import { host } from '@/config';
 import * as os from '@/os';
-import { ColdDeviceStorage } from '@/store';
+import { ColdDeviceStorage, defaultStore } from '@/store';
 import { addTheme } from '@/theme-store';
 import * as symbols from '@/symbols';
+import { i18n } from '@/i18n';
+import { useLeaveGuard } from '@/scripts/use-leave-guard';
 
-export default defineComponent({
-	components: {
-		FormButton,
-		FormTextarea,
-		FormFolder,
-	},
+const bgColors = [
+	{ color: '#f5f5f5', kind: 'light', forPreview: '#f5f5f5' },
+	{ color: '#f0eee9', kind: 'light', forPreview: '#f3e2b9' },
+	{ color: '#e9eff0', kind: 'light', forPreview: '#bfe3e8' },
+	{ color: '#f0e9ee', kind: 'light', forPreview: '#f1d1e8' },
+	{ color: '#dce2e0', kind: 'light', forPreview: '#a4dccc' },
+	{ color: '#e2e0dc', kind: 'light', forPreview: '#d8c7a5' },
+	{ color: '#d5dbe0', kind: 'light', forPreview: '#b0cae0' },
+	{ color: '#dad5d5', kind: 'light', forPreview: '#d6afaf' },
+	{ color: '#2b2b2b', kind: 'dark', forPreview: '#444444' },
+	{ color: '#362e29', kind: 'dark', forPreview: '#735c4d' },
+	{ color: '#303629', kind: 'dark', forPreview: '#506d2f' },
+	{ color: '#293436', kind: 'dark', forPreview: '#258192' },
+	{ color: '#2e2936', kind: 'dark', forPreview: '#504069' },
+	{ color: '#252722', kind: 'dark', forPreview: '#3c462f' },
+	{ color: '#212525', kind: 'dark', forPreview: '#303e3e' },
+	{ color: '#191919', kind: 'dark', forPreview: '#272727' },
+] as const;
+const accentColors = ['#e36749', '#f29924', '#98c934', '#34c9a9', '#34a1c9', '#606df7', '#8d34c9', '#e84d83'];
+const fgColors = [
+	{ color: 'none', forLight: '#5f5f5f', forDark: '#dadada', forPreview: null },
+	{ color: 'red', forLight: '#7f6666', forDark: '#e4d1d1', forPreview: '#ca4343' },
+	{ color: 'yellow', forLight: '#736955', forDark: '#e0d5c0', forPreview: '#d49923' },
+	{ color: 'green', forLight: '#586d5b', forDark: '#d1e4d4', forPreview: '#4cbd5c' },
+	{ color: 'cyan', forLight: '#5d7475', forDark: '#d1e3e4', forPreview: '#2abdc3' },
+	{ color: 'blue', forLight: '#676880', forDark: '#d1d2e4', forPreview: '#7275d8' },
+	{ color: 'pink', forLight: '#84667d', forDark: '#e4d1e0', forPreview: '#b12390' },
+];
 
-	async beforeRouteLeave(to, from) {
-		if (this.changed && !(await this.leaveConfirm())) {
-			return false;
-		}
-	},
+const theme = $ref<Partial<Theme>>({
+	base: 'light',
+	props: lightTheme.props,
+});
+let description = $ref<string | null>(null);
+let themeCode = $ref<string | null>(null);
+let changed = $ref(false);
 
-	data() {
-		return {
-			[symbols.PAGE_INFO]: {
-				title: this.$ts.themeEditor,
-				icon: 'fas fa-palette',
-				bg: 'var(--bg)',
-				actions: [{
-					asFullButton: true,
-					icon: 'fas fa-eye',
-					text: this.$ts.preview,
-					handler: this.showPreview,
-				}, {
-					asFullButton: true,
-					icon: 'fas fa-check',
-					text: this.$ts.saveAs,
-					handler: this.saveAs,
-				}],
-			},
-			theme: {
-				base: 'light',
-				props: lightTheme.props
-			} as Theme,
-			description: null,
-			themeCode: null,
-			bgColors: [
-				{ color: '#f5f5f5', kind: 'light', forPreview: '#f5f5f5' },
-				{ color: '#f0eee9', kind: 'light', forPreview: '#f3e2b9' },
-				{ color: '#e9eff0', kind: 'light', forPreview: '#bfe3e8' },
-				{ color: '#f0e9ee', kind: 'light', forPreview: '#f1d1e8' },
-				{ color: '#dce2e0', kind: 'light', forPreview: '#a4dccc' },
-				{ color: '#e2e0dc', kind: 'light', forPreview: '#d8c7a5' },
-				{ color: '#d5dbe0', kind: 'light', forPreview: '#b0cae0' },
-				{ color: '#dad5d5', kind: 'light', forPreview: '#d6afaf' },
-				{ color: '#2b2b2b', kind: 'dark', forPreview: '#444444' },
-				{ color: '#362e29', kind: 'dark', forPreview: '#735c4d' },
-				{ color: '#303629', kind: 'dark', forPreview: '#506d2f' },
-				{ color: '#293436', kind: 'dark', forPreview: '#258192' },
-				{ color: '#2e2936', kind: 'dark', forPreview: '#504069' },
-				{ color: '#252722', kind: 'dark', forPreview: '#3c462f' },
-				{ color: '#212525', kind: 'dark', forPreview: '#303e3e' },
-				{ color: '#191919', kind: 'dark', forPreview: '#272727' },
-			],
-			accentColors: ['#e36749', '#f29924', '#98c934', '#34c9a9', '#34a1c9', '#606df7', '#8d34c9', '#e84d83'],
-			fgColors: [
-				{ color: 'none', forLight: '#5f5f5f', forDark: '#dadada', forPreview: null },
-				{ color: 'red', forLight: '#7f6666', forDark: '#e4d1d1', forPreview: '#ca4343' },
-				{ color: 'yellow', forLight: '#736955', forDark: '#e0d5c0', forPreview: '#d49923' },
-				{ color: 'green', forLight: '#586d5b', forDark: '#d1e4d4', forPreview: '#4cbd5c' },
-				{ color: 'cyan', forLight: '#5d7475', forDark: '#d1e3e4', forPreview: '#2abdc3' },
-				{ color: 'blue', forLight: '#676880', forDark: '#d1d2e4', forPreview: '#7275d8' },
-				{ color: 'pink', forLight: '#84667d', forDark: '#e4d1e0', forPreview: '#b12390' },
-			],
-			changed: false,
-		}
-	},
+useLeaveGuard($$(changed));
 
-	created() {
-		this.$watch('theme', this.apply, { deep: true });
-		window.addEventListener('beforeunload', this.beforeunload);
-	},
+function showPreview() {
+	os.pageWindow('preview');
+}
 
-	beforeUnmount() {
-		window.removeEventListener('beforeunload', this.beforeunload);
-	},
-
-	methods: {
-		beforeunload(e: BeforeUnloadEvent) {
-			if (this.changed) {
-				e.preventDefault();
-				e.returnValue = '';
-			}
-		},
-
-		async leaveConfirm(): Promise<boolean> {
-			const { canceled } = await os.confirm({
-				type: 'warning',
-				text: this.$ts.leaveConfirm,
-			});
-			return !canceled;
-		},
-
-		showPreview() {
-			os.pageWindow('preview');
-		},
-
-		setBgColor(color) {
-			if (this.theme.base != color.kind) {
-				const base = color.kind === 'dark' ? darkTheme : lightTheme;
-				for (const prop of Object.keys(base.props)) {
-					if (prop === 'accent') continue;
-					if (prop === 'fg') continue;
-					this.theme.props[prop] = base.props[prop];
-				}
-			}
-			this.theme.base = color.kind;
-			this.theme.props.bg = color.color;
-
-			if (this.theme.props.fg) {
-				const matchedFgColor = this.fgColors.find(x => [tinycolor(x.forLight).toRgbString(), tinycolor(x.forDark).toRgbString()].includes(tinycolor(this.theme.props.fg).toRgbString()));
-				if (matchedFgColor) this.setFgColor(matchedFgColor);
-			}
-		},
-
-		setAccentColor(color) {
-			this.theme.props.accent = color;
-		},
-
-		setFgColor(color) {
-			this.theme.props.fg = this.theme.base === 'light' ? color.forLight : color.forDark;
-		},
-
-		apply() {
-			this.themeCode = JSON5.stringify(this.theme, null, '\t');
-			applyTheme(this.theme, false);
-			this.changed = true;
-		},
-
-		applyThemeCode() {
-			let parsed;
-
-			try {
-				parsed = JSON5.parse(this.themeCode);
-			} catch (e) {
-				os.alert({
-					type: 'error',
-					text: this.$ts._theme.invalid
-				});
-				return;
-			}
-
-			this.theme = parsed;
-		},
-
-		async saveAs() {
-			const { canceled, result: name } = await os.inputText({
-				title: this.$ts.name,
-				allowEmpty: false
-			});
-			if (canceled) return;
-
-			this.theme.id = uuid();
-			this.theme.name = name;
-			this.theme.author = `@${this.$i.username}@${toUnicode(host)}`;
-			if (this.description) this.theme.desc = this.description;
-			addTheme(this.theme);
-			applyTheme(this.theme);
-			if (this.$store.state.darkMode) {
-				ColdDeviceStorage.set('darkTheme', this.theme);
-			} else {
-				ColdDeviceStorage.set('lightTheme', this.theme);
-			}
-			this.changed = false;
-			os.alert({
-				type: 'success',
-				text: this.$t('_theme.installed', { name: this.theme.name })
-			});
+function setBgColor(color: typeof bgColors[number]) {
+	if (theme.base != color.kind) {
+		const base = color.kind === 'dark' ? darkTheme : lightTheme;
+		for (const prop of Object.keys(base.props)) {
+			if (prop === 'accent') continue;
+			if (prop === 'fg') continue;
+			theme.props[prop] = base.props[prop];
 		}
 	}
+	theme.base = color.kind;
+	theme.props.bg = color.color;
+
+	if (theme.props.fg) {
+		const matchedFgColor = fgColors.find(x => [tinycolor(x.forLight).toRgbString(), tinycolor(x.forDark).toRgbString()].includes(tinycolor(theme.props.fg).toRgbString()));
+		if (matchedFgColor) setFgColor(matchedFgColor);
+	}
+}
+
+function setAccentColor(color) {
+	theme.props.accent = color;
+}
+
+function setFgColor(color) {
+	theme.props.fg = theme.base === 'light' ? color.forLight : color.forDark;
+}
+
+function apply() {
+	themeCode = JSON5.stringify(theme, null, '\t');
+	applyTheme(theme, false);
+	changed = true;
+}
+
+function applyThemeCode() {
+	let parsed;
+
+	try {
+		parsed = JSON5.parse(themeCode);
+	} catch (err) {
+		os.alert({
+			type: 'error',
+			text: i18n.locale._theme.invalid,
+		});
+		return;
+	}
+
+	theme = parsed;
+}
+
+async function saveAs() {
+	const { canceled, result: name } = await os.inputText({
+		title: i18n.locale.name,
+		allowEmpty: false,
+	});
+	if (canceled) return;
+
+	theme.id = uuid();
+	theme.name = name;
+	theme.author = `@${$i.username}@${toUnicode(host)}`;
+	if (description) theme.desc = description;
+	addTheme(theme);
+	applyTheme(theme);
+	if (defaultStore.state.darkMode) {
+		ColdDeviceStorage.set('darkTheme', theme);
+	} else {
+		ColdDeviceStorage.set('lightTheme', theme);
+	}
+	changed = false;
+	os.alert({
+		type: 'success',
+		text: i18n.t('_theme.installed', { name: theme.name }),
+	});
+}
+
+watch($$(theme), apply, { deep: true });
+
+defineExpose({
+	[symbols.PAGE_INFO]: {
+		title: i18n.locale.themeEditor,
+		icon: 'fas fa-palette',
+		bg: 'var(--bg)',
+		actions: [{
+			asFullButton: true,
+			icon: 'fas fa-eye',
+			text: i18n.locale.preview,
+			handler: showPreview,
+		}, {
+			asFullButton: true,
+			icon: 'fas fa-check',
+			text: i18n.locale.saveAs,
+			handler: saveAs,
+		}],
+	},
 });
 </script>
 
diff --git a/packages/client/src/pages/timeline.vue b/packages/client/src/pages/timeline.vue
index 216b3c34ea..ecd1ae6257 100644
--- a/packages/client/src/pages/timeline.vue
+++ b/packages/client/src/pages/timeline.vue
@@ -1,6 +1,6 @@
 <template>
 <MkSpacer :content-max="800">
-	<div v-hotkey.global="keymap" class="cmuxhskf">
+	<div ref="rootEl" v-hotkey.global="keymap" class="cmuxhskf">
 		<XTutorial v-if="$store.reactiveState.tutorial.value != -1" class="tutorial _block"/>
 		<XPostForm v-if="$store.reactiveState.showFixedPostForm.value" class="post-form _block" fixed/>
 
@@ -17,163 +17,139 @@
 </MkSpacer>
 </template>
 
-<script lang="ts">
-import { defineComponent, defineAsyncComponent, computed } from 'vue';
+<script lang="ts" setup>
+import { defineAsyncComponent, computed, watch } from 'vue';
 import XTimeline from '@/components/timeline.vue';
 import XPostForm from '@/components/post-form.vue';
 import { scroll } from '@/scripts/scroll';
 import * as os from '@/os';
 import * as symbols from '@/symbols';
+import { defaultStore } from '@/store';
+import { i18n } from '@/i18n';
+import { instance } from '@/instance';
+import { $i } from '@/account';
 
-export default defineComponent({
-	name: 'timeline',
+const XTutorial = defineAsyncComponent(() => import('./timeline.tutorial.vue'));
 
-	components: {
-		XTimeline,
-		XTutorial: defineAsyncComponent(() => import('./timeline.tutorial.vue')),
-		XPostForm,
-	},
+const isLocalTimelineAvailable = !instance.disableLocalTimeline || ($i != null && ($i.isModerator || $i.isAdmin));
+const isGlobalTimelineAvailable = !instance.disableGlobalTimeline || ($i != null && ($i.isModerator || $i.isAdmin));
+const keymap = {
+	't': focus,
+};
 
-	data() {
-		return {
-			src: 'home',
-			queue: 0,
-			[symbols.PAGE_INFO]: computed(() => ({
-				title: this.$ts.timeline,
-				icon: this.src === 'local' ? 'fas fa-comments' : this.src === 'social' ? 'fas fa-share-alt' : this.src === 'global' ? 'fas fa-globe' : 'fas fa-home',
-				bg: 'var(--bg)',
-				actions: [{
-					icon: 'fas fa-list-ul',
-					text: this.$ts.lists,
-					handler: this.chooseList
-				}, {
-					icon: 'fas fa-satellite',
-					text: this.$ts.antennas,
-					handler: this.chooseAntenna
-				}, {
-					icon: 'fas fa-satellite-dish',
-					text: this.$ts.channel,
-					handler: this.chooseChannel
-				}, {
-					icon: 'fas fa-calendar-alt',
-					text: this.$ts.jumpToSpecifiedDate,
-					handler: this.timetravel
-				}],
-				tabs: [{
-					active: this.src === 'home',
-					title: this.$ts._timelines.home,
-					icon: 'fas fa-home',
-					iconOnly: true,
-					onClick: () => { this.src = 'home'; this.saveSrc(); },
-				}, ...(this.isLocalTimelineAvailable ? [{
-					active: this.src === 'local',
-					title: this.$ts._timelines.local,
-					icon: 'fas fa-comments',
-					iconOnly: true,
-					onClick: () => { this.src = 'local'; this.saveSrc(); },
-				}, {
-					active: this.src === 'social',
-					title: this.$ts._timelines.social,
-					icon: 'fas fa-share-alt',
-					iconOnly: true,
-					onClick: () => { this.src = 'social'; this.saveSrc(); },
-				}] : []), ...(this.isGlobalTimelineAvailable ? [{
-					active: this.src === 'global',
-					title: this.$ts._timelines.global,
-					icon: 'fas fa-globe',
-					iconOnly: true,
-					onClick: () => { this.src = 'global'; this.saveSrc(); },
-				}] : [])],
-			})),
-		};
-	},
+const tlComponent = $ref<InstanceType<typeof XTimeline>>();
+const rootEl = $ref<HTMLElement>();
 
-	computed: {
-		keymap(): any {
-			return {
-				't': this.focus
-			};
-		},
+let src = $ref<'home' | 'local' | 'social' | 'global'>(defaultStore.state.tl.src);
+let queue = $ref(0);
 
-		isLocalTimelineAvailable(): boolean {
-			return !this.$instance.disableLocalTimeline || this.$i.isModerator || this.$i.isAdmin;
-		},
+function queueUpdated(q: number): void {
+	queue = q;
+}
 
-		isGlobalTimelineAvailable(): boolean {
-			return !this.$instance.disableGlobalTimeline || this.$i.isModerator || this.$i.isAdmin;
-		},
-	},
+function top(): void {
+	scroll(rootEl, { top: 0 });
+}
 
-	watch: {
-		src() {
-			this.showNav = false;
-		},
-	},
+async function chooseList(ev: MouseEvent): Promise<void> {
+	const lists = await os.api('users/lists/list');
+	const items = lists.map(list => ({
+		type: 'link',
+		text: list.name,
+		to: `/timeline/list/${list.id}`,
+	}));
+	os.popupMenu(items, ev.currentTarget || ev.target);
+}
 
-	created() {
-		this.src = this.$store.state.tl.src;
-	},
+async function chooseAntenna(ev: MouseEvent): Promise<void> {
+	const antennas = await os.api('antennas/list');
+	const items = antennas.map(antenna => ({
+		type: 'link',
+		text: antenna.name,
+		indicate: antenna.hasUnreadNote,
+		to: `/timeline/antenna/${antenna.id}`,
+	}));
+	os.popupMenu(items, ev.currentTarget || ev.target);
+}
 
-	methods: {
-		queueUpdated(q) {
-			this.queue = q;
-		},
+async function chooseChannel(ev: MouseEvent): Promise<void> {
+	const channels = await os.api('channels/followed');
+	const items = channels.map(channel => ({
+		type: 'link',
+		text: channel.name,
+		indicate: channel.hasUnreadNote,
+		to: `/channels/${channel.id}`,
+	}));
+	os.popupMenu(items, ev.currentTarget || ev.target);
+}
 
-		top() {
-			scroll(this.$el, { top: 0 });
-		},
+function saveSrc(): void {
+	defaultStore.set('tl', {
+		src: src,
+	});
+}
 
-		async chooseList(ev) {
-			const lists = await os.api('users/lists/list');
-			const items = lists.map(list => ({
-				type: 'link',
-				text: list.name,
-				to: `/timeline/list/${list.id}`
-			}));
-			os.popupMenu(items, ev.currentTarget || ev.target);
-		},
+async function timetravel(): Promise<void> {
+	const { canceled, result: date } = await os.inputDate({
+		title: i18n.locale.date,
+	});
+	if (canceled) return;
 
-		async chooseAntenna(ev) {
-			const antennas = await os.api('antennas/list');
-			const items = antennas.map(antenna => ({
-				type: 'link',
-				text: antenna.name,
-				indicate: antenna.hasUnreadNote,
-				to: `/timeline/antenna/${antenna.id}`
-			}));
-			os.popupMenu(items, ev.currentTarget || ev.target);
-		},
+	tlComponent.timetravel(date);
+}
 
-		async chooseChannel(ev) {
-			const channels = await os.api('channels/followed');
-			const items = channels.map(channel => ({
-				type: 'link',
-				text: channel.name,
-				indicate: channel.hasUnreadNote,
-				to: `/channels/${channel.id}`
-			}));
-			os.popupMenu(items, ev.currentTarget || ev.target);
-		},
+function focus(): void {
+	tlComponent.focus();
+}
 
-		saveSrc() {
-			this.$store.set('tl', {
-				src: this.src,
-			});
-		},
-
-		async timetravel() {
-			const { canceled, result: date } = await os.inputDate({
-				title: this.$ts.date,
-			});
-			if (canceled) return;
-
-			this.$refs.tl.timetravel(date);
-		},
-
-		focus() {
-			(this.$refs.tl as any).focus();
-		}
-	}
+defineExpose({
+	[symbols.PAGE_INFO]: computed(() => ({
+		title: i18n.locale.timeline,
+		icon: src === 'local' ? 'fas fa-comments' : src === 'social' ? 'fas fa-share-alt' : src === 'global' ? 'fas fa-globe' : 'fas fa-home',
+		bg: 'var(--bg)',
+		actions: [{
+			icon: 'fas fa-list-ul',
+			text: i18n.locale.lists,
+			handler: chooseList,
+		}, {
+			icon: 'fas fa-satellite',
+			text: i18n.locale.antennas,
+			handler: chooseAntenna,
+		}, {
+			icon: 'fas fa-satellite-dish',
+			text: i18n.locale.channel,
+			handler: chooseChannel,
+		}, {
+			icon: 'fas fa-calendar-alt',
+			text: i18n.locale.jumpToSpecifiedDate,
+			handler: timetravel,
+		}],
+		tabs: [{
+			active: src === 'home',
+			title: i18n.locale._timelines.home,
+			icon: 'fas fa-home',
+			iconOnly: true,
+			onClick: () => { src = 'home'; saveSrc(); },
+		}, ...(isLocalTimelineAvailable ? [{
+			active: src === 'local',
+			title: i18n.locale._timelines.local,
+			icon: 'fas fa-comments',
+			iconOnly: true,
+			onClick: () => { src = 'local'; saveSrc(); },
+		}, {
+			active: src === 'social',
+			title: i18n.locale._timelines.social,
+			icon: 'fas fa-share-alt',
+			iconOnly: true,
+			onClick: () => { src = 'social'; saveSrc(); },
+		}] : []), ...(isGlobalTimelineAvailable ? [{
+			active: src === 'global',
+			title: i18n.locale._timelines.global,
+			icon: 'fas fa-globe',
+			iconOnly: true,
+			onClick: () => { src = 'global'; saveSrc(); },
+		}] : [])],
+	})),
 });
 </script>
 
diff --git a/packages/client/src/scripts/use-leave-guard.ts b/packages/client/src/scripts/use-leave-guard.ts
new file mode 100644
index 0000000000..21899af59a
--- /dev/null
+++ b/packages/client/src/scripts/use-leave-guard.ts
@@ -0,0 +1,34 @@
+import { inject, onUnmounted, Ref } from 'vue';
+import { i18n } from '@/i18n';
+import * as os from '@/os';
+
+export function useLeaveGuard(enabled: Ref<boolean>) {
+	const setLeaveGuard = inject('setLeaveGuard');
+
+	if (setLeaveGuard) {
+		setLeaveGuard(async () => {
+			if (!enabled.value) return false;
+
+			const { canceled } = await os.confirm({
+				type: 'warning',
+				text: i18n.locale.leaveConfirm,
+			});
+
+			return canceled;
+		});
+	}
+
+	/*
+	function onBeforeLeave(ev: BeforeUnloadEvent) {
+		if (enabled.value) {
+			ev.preventDefault();
+			ev.returnValue = '';
+		}
+	}
+
+	window.addEventListener('beforeunload', onBeforeLeave);
+	onUnmounted(() => {
+		window.removeEventListener('beforeunload', onBeforeLeave);
+	});
+	*/
+}
diff --git a/packages/client/src/store.ts b/packages/client/src/store.ts
index a57e8ec62b..cd358d29d0 100644
--- a/packages/client/src/store.ts
+++ b/packages/client/src/store.ts
@@ -97,7 +97,7 @@ export const defaultStore = markRaw(new Storage('base', {
 	tl: {
 		where: 'deviceAccount',
 		default: {
-			src: 'home',
+			src: 'home' as 'home' | 'local' | 'social' | 'global',
 			arg: null
 		}
 	},