なんかもうめっちゃやった

src/client/app/desktop/views/pages/admin/admin.announcements.vue

@@ -0,0 +1,41 @@
+<template>
+<div class="qldxjjsrseehkusjuoooapmsprvfrxyl mk-admin-card">
+	<header>%i18n:@announcements%</header>
+	<textarea v-model="broadcasts"></textarea>
+	<button class="ui" @click="save">%i18n:@save%</button>
+</div>
+</template>
+
+<script lang="ts">
+import Vue from "vue";
+
+export default Vue.extend({
+	data() {
+		return {
+			broadcasts: '',
+		};
+	},
+	created() {
+		(this as any).os.getMeta().then(meta => {
+			this.broadcasts = JSON.stringify(meta.broadcasts, null, '  ');
+		});
+	},
+	methods: {
+		save() {
+			(this as any).api('admin/update-meta', {
+				broadcasts: JSON.parse(this.broadcasts)
+			});
+		}
+	}
+});
+</script>
+
+<style lang="stylus" scoped>
+@import '~const.styl'
+
+.qldxjjsrseehkusjuoooapmsprvfrxyl
+	textarea
+		width 100%
+		min-height 300px
+
+</style>