功能：内置公屏叫号音频并仅播号码

需求：屏行天下等设备缺少中文语音服务，speechSynthesis 无法播报；公屏不再播项目名。

实现：内置中文数字和提示语 WAV 素材，统一通过普通 audio 元素顺序组合播放，每次叫号重复三遍，并保留首次点击解锁。

验证：前端 65 项测试通过，生产构建通过，真实浏览器完成 WAV 解码播放且无媒体错误。

web/src/hooks/useAudioAnnouncements.test.ts

@@ -0,0 +1,37 @@
+import { describe, expect, it } from "vitest";
+import { announcementAudioQueue } from "./useAudioAnnouncements";
+
+describe("announcementAudioQueue", () => {
+  it("忽略项目名并把单号码播报素材重复三遍", () => {
+    const once = [
+      "/audio/queue-voice/please.wav",
+      "/audio/queue-voice/digit-0.wav",
+      "/audio/queue-voice/digit-0.wav",
+      "/audio/queue-voice/digit-0.wav",
+      "/audio/queue-voice/digit-1.wav",
+      "/audio/queue-voice/digit-6.wav",
+      "/audio/queue-voice/number.wav",
+      "/audio/queue-voice/entrance.wav",
+      "/audio/queue-voice/gap.wav",
+    ];
+
+    expect(announcementAudioQueue(["东门观光车，请零零零一六号，前往入口。"]))
+      .toEqual([...once, ...once, ...once]);
+  });
+
+  it("支持连续号码范围", () => {
+    const queue = announcementAudioQueue(["请一七号至一九号，前往入口。"]);
+
+    expect(queue.slice(0, 9)).toEqual([
+      "/audio/queue-voice/please.wav",
+      "/audio/queue-voice/digit-1.wav",
+      "/audio/queue-voice/digit-7.wav",
+      "/audio/queue-voice/number.wav",
+      "/audio/queue-voice/through.wav",
+      "/audio/queue-voice/digit-1.wav",
+      "/audio/queue-voice/digit-9.wav",
+      "/audio/queue-voice/number.wav",
+      "/audio/queue-voice/entrance.wav",
+    ]);
+  });
+});