ncm A2: 音频输出迁移 meow_audiod（SINK_AUDIOD 默认后端）— 修无声根因

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- audio_out.c: 新增 SINK_AUDIOD 默认（SDK meow_audio_* 连 audiod）；NCM_AUDIO_SINK=file/null/alsa
  与 MEOW_AUDIO_DIRECT=1 保留调试后端；ALSA 保底修两大坑（hw_params 全放行初始化 + mask 清零
  再单点）——旧 memset0 interval=「只能取0」→ HW_PARAMS 恒 EINVAL 即播放无声根因
- 新增 audio_out_pause：PAUSED 沿向 audiod 发 pause（停时钟不丢流）；resume 流死自动重开
- player_manager: 注册 meow_audio_on_preempt → g_play 命令通道暂停；播放事件全量 meow_log
  （open 参数/grant_*/write 错误节流/切歌/暂停/seek/done）
- appstate/app: /tmp/ncm_autoplay 真机联调 hook（仅播已缓存曲目，绝不发 song_url）
- bench/audiod_chain_sim.c: 真实 audiod_host 假 socket 全链离线回归 14 项全 PASS
- 验证: host 0 warning / WAV 回归 / qemu core PASS / mipsel 0 warning；真机 OPEN→grant 已通，
  持续写帧被 M2.90 设备 PCM 播放内核硬挂死阻断（REPORT §16.3，4/4 复现，留主会话）
- ncm md5 db5b78ad9e8f40e6306484efe2a08eb3（已热更设备）

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MeowOS committed 2026-09-01 01:17:21 +08:00

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commit e0136213fe

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+598 -41

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