feat(admin-web): surface queued publish hint in media view

Restores publish hints for queued and immediate states so operators
know when a task will wait for the desktop client to come back online.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/admin-web/src/views/MediaView.vue

@@ -159,6 +159,12 @@ function resolvePublishState(account: DesktopAccountInfo): PublishState {
 }
 
 function resolvePublishHint(account: DesktopAccountInfo, publishState: PublishState): string {
+  if (publishState === "immediate") {
+    return "";
+  }
+  if (publishState === "queued") {
+    return "客户端当前离线，任务会先进入发布队列，等桌面端上线后自动继续。";
+  }
   if (account.health !== "live") {
     return "授权状态异常，先在桌面端重新校验后再发布。";
   }