test(audio): [PKG-AUDIO-02] cover released behavior and real media

refactor/risks.json

@@ -2647,7 +2647,7 @@
     {
       "id": "AUDIO-LIFE-01",
       "title": "Audio Track 销毁后 update 与媒体/订阅缺少终止守卫",
-      "confirmation": "source-observed",
+      "confirmation": "reproduced",
       "status": "open",
       "owners": [
         "PKG-AUDIO-02",
@@ -2656,15 +2656,18 @@
       ],
       "evidence": [
         "refactor/baselines/audio-track-contract.md",
-        "refactor/baselines/audio-track-release.json"
+        "refactor/baselines/audio-track-release.json",
+        "test/audio-track.test.js",
+        "test/browser/audio-track.spec.js",
+        "refactor/baselines/audio-validation.json"
       ],
       "compatibleResolution": "保留公开 audio 和同步 update，封闭销毁后的资源写入并管理插件订阅，验证待决播放拒绝。",
       "closureCriteria": "受控复现和新旧核心真实媒体切源/销毁验证通过，不以源码观察代替泄漏证据。"
     },
     {
       "id": "AUDIO-SYNC-01",
-      "title": "Audio Track 偏移边界和切源/缓冲恢复尚缺真实时序证据",
-      "confirmation": "unverified",
+      "title": "Audio Track 未同步原生暂停/结束，偏移边界与切源/缓冲仍待完整验证",
+      "confirmation": "reproduced",
       "status": "open",
       "owners": [
         "PKG-AUDIO-02",
@@ -2673,7 +2676,10 @@
       ],
       "evidence": [
         "refactor/baselines/audio-track-contract.md",
-        "refactor/baselines/audio-track-release.json"
+        "refactor/baselines/audio-track-release.json",
+        "test/audio-track.test.js",
+        "test/browser/audio-track.spec.js",
+        "refactor/baselines/audio-validation.json"
       ],
       "compatibleResolution": "固定严格阈值、偏移正负、倍率和音量语义；实测负目标/超时长及连续切源，按证据修复。",
       "closureCriteria": "正常/边界/失败/缓冲恢复有媒体与受控断言，实际支持环境缺口明确处理。"