diff --git a/packages/client/src/pages/auth.vue b/packages/client/src/pages/auth.vue
index 9457cd6b2..a3e363661 100644
--- a/packages/client/src/pages/auth.vue
+++ b/packages/client/src/pages/auth.vue
@@ -1,26 +1,24 @@
 <template>
-<div v-if="$i && fetching" class="">
-	<MkLoading/>
-</div>
-<div v-else-if="$i">
+<div v-if="$i">
+	<MkLoading v-if="state == 'fetching'"/>
 	<XForm
-		v-if="state == 'waiting'"
+		v-else-if="state == 'waiting'"
 		ref="form"
 		class="form"
 		:session="session"
 		@denied="state = 'denied'"
 		@accepted="accepted"
 	/>
-	<div v-if="state == 'denied'" class="denied">
-		<h1>{{ $ts._auth.denied }}</h1>
+	<div v-else-if="state == 'denied'" class="denied">
+		<h1>{{ i18n.ts._auth.denied }}</h1>
 	</div>
-	<div v-if="state == 'accepted'" class="accepted">
-		<h1>{{ session.app.isAuthorized ? $t('already-authorized') : $ts.allowed }}</h1>
-		<p v-if="session.app.callbackUrl">{{ $ts._auth.callback }}<MkEllipsis/></p>
-		<p v-if="!session.app.callbackUrl">{{ $ts._auth.pleaseGoBack }}</p>
+	<div v-else-if="state == 'accepted'" class="accepted">
+		<h1>{{ session.app.isAuthorized ? i18n.t('already-authorized') : i18n.ts.allowed }}</h1>
+		<p v-if="session.app.callbackUrl">{{ i18n.ts._auth.callback }}<MkEllipsis/></p>
+		<p v-if="!session.app.callbackUrl">{{ i18n.ts._auth.pleaseGoBack }}</p>
 	</div>
-	<div v-if="state == 'fetch-session-error'" class="error">
-		<p>{{ $ts.somethingHappened }}</p>
+	<div v-else-if="state == 'fetch-session-error'" class="error">
+		<p>{{ i18n.ts.somethingHappened }}</p>
 	</div>
 </div>
 <div v-else class="signin">
@@ -28,64 +26,55 @@
 </div>
 </template>
 
-<script lang="ts">
-import { defineComponent } from 'vue';
+<script lang="ts" setup>
+import { onMounted } from 'vue';
 import XForm from './auth.form.vue';
 import MkSignin from '@/components/signin.vue';
 import * as os from '@/os';
 import { login } from '@/account';
+import { i18n } from '@/i18n';
+import { $i } from '@/account';
+import { query, appendQuery } from '@/scripts/url';
 
-export default defineComponent({
-	components: {
-		XForm,
-		MkSignin,
-	},
-	props: ['token'],
-	data() {
-		return {
-			state: null,
-			session: null,
-			fetching: true,
-		};
-	},
-	mounted() {
-		if (!this.$i) return;
+const props = defineProps<{
+	token: string;
+}>();
 
-		// Fetch session
-		os.api('auth/session/show', {
-			token: this.token,
-		}).then(session => {
-			this.session = session;
-			this.fetching = false;
+let state: 'fetching' | 'waiting' | 'denied' | 'accepted' | 'fetch-session-error' = $ref('fetching');
+let session = $ref(null);
 
-			// 既に連携していた場合
-			if (this.session.app.isAuthorized) {
-				os.api('auth/accept', {
-					token: this.session.token,
-				}).then(() => {
-					this.accepted();
-				});
-			} else {
-				this.state = 'waiting';
-			}
-		}).catch(error => {
-			this.state = 'fetch-session-error';
-			this.fetching = false;
-		});
-	},
-	methods: {
-		accepted() {
-			this.state = 'accepted';
-			if (this.session.app.callbackUrl) {
-				location.href = `${this.session.app.callbackUrl}?token=${this.session.token}`;
-			}
-		}, onLogin(res) {
-			login(res.i);
-		},
-	},
+onMounted(() => {
+	if (!$i) return;
+
+	// Fetch session
+	os.api('auth/session/show', {
+		token: props.token,
+	}).then(fetchedSession => {
+		session = fetchedSession;
+
+		// 既に連携していた場合
+		if (session.app.isAuthorized) {
+			os.api('auth/accept', {
+				token: session.token,
+			}).then(() => {
+				this.accepted();
+			});
+		} else {
+			state = 'waiting';
+		}
+	}).catch(error => {
+		state = 'fetch-session-error';
+	});
 });
+
+function accepted() {
+	state = 'accepted';
+	if (session.app.callbackUrl) {
+		location.href = appendQuery(session.app.callbackUrl, query({ token: session.token }));
+	}
+}
+
+function onLogin(res) {
+	login(res.i);
+}
 </script>
-
-<style lang="scss" scoped>
-
-</style>