fix(client): チャットが見れない

Fix #8203

packages/client/src/pages/messaging/messaging-room.vue

@@ -11,7 +11,7 @@
 			<button v-show="existMoreMessages" ref="loadMore" class="more _button" :class="{ fetching: fetchingMoreMessages }" :disabled="fetchingMoreMessages" @click="fetchMoreMessages">
 				<template v-if="fetchingMoreMessages"><i class="fas fa-spinner fa-pulse fa-fw"></i></template>{{ fetchingMoreMessages ? $ts.loading : $ts.loadMore }}
 			</button>
-			<XList v-slot="{ item: message }" class="messages" :items="messages" direction="up" reversed>
+			<XList v-if="messages.length > 0" v-slot="{ item: message }" class="messages" :items="messages" direction="up" reversed>
 				<XMessage :key="message.id" :message="message" :is-group="group != null"/>
 			</XList>
 		</div>