fix: 修复远端公告不刷新与盔甲面板未翻译

Bug1 远端公告：公告只在启动时拉取一次，且点铃铛不触发刷新。
- openCenter 时补调 refresh()，点铃铛即拉最新
- watch skinSiteStatus，登录皮肤站后自动重试拉取

Bug2 盔甲翻译：补 7 个缺失的 app.skins.armor.* i18n 键
（title/save/close/description/unsaved/reset-to-saved/restore-defaults），
ui 包的 skin.preview.armor.* 46 个键已存在无需补。

apps/app-frontend/src/components/ui/RemoteAnnouncements.vue

@@ -100,6 +100,7 @@ function emitState() {
 }
 function openCenter(item?: RemoteAnnouncement) {
 	if (!props.ready || disposed) return
+	void refresh()
 	centerOpen.value = true
 	if (item) {
 		startupNotice.value = null
@@ -302,6 +303,10 @@ onMounted(() => {
 		setTimeout(start, 500)
 	}
 })
+watch(skinSiteStatus, (status) => {
+	if (disposed || props.previewOnly) return
+	if (status === 'signed-in') void refresh()
+})
 watch([() => props.ready, hasModal], () => {
 	if (advanceTimer) clearTimeout(advanceTimer)
 	advanceTimer = setTimeout(advance, 350)