- Settings → 行为设置: two new toggles (保存/加载播放清单, 单曲直接播放不清空队列)
that round-trip savedQueuesEnabled / playKeepsQueue and keep the nav gate in sync.
- New "已存队列" page (/saved-queues): save the current queue (with a 共享 option),
load (replace) / append / delete saved queues; renders a "feature disabled"
state on 403 so it degrades gracefully when the flag is off.
- Nav entry gated on the savedQueuesEnabled store flag (hidden for guests).
- useSavedQueues API composable + a pure, unit-tested list/ownership helper.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
