A1: meow_audiod 独占音频服务（agent-244 骨架 + agent-246 真机收尾）

- meow_audiod：启动门控(/tmp/meow_boot_mode 非 meow exit 0)、IO/播放/路由三线程、
  ring ~200ms、ALSA UAPI 独占直开、切率 mute-重配-恢复、抢占(后开赢+PREEMPTED)、
  socket EOF 回收、xrun PREPARE 恢复；meow_route 轮询逻辑并入路由线程
- meow_audio CLI：status/tone/route/vol；services.d/audiod.conf(trigger=manual,on-fail)
- SDK meow_ui_audio.c 编进 meow_ui.a：懒连接/读线程分发 PREEMPTED 回调/EPIPE 标死/
  无 audiod 返回 MEOW_ERR_NOENT 不隐式直开(MEOW_AUDIO_DIRECT=1 仅调试)
- launcher：确认 MeowOS 模式后 meow_svcd start audiod(double-fork best-effort 不阻塞)
- meow_route 退役：S89 预置换 audiod.conf + 清理旧 meow_route.conf(防拉起已删二进制
  重启循环)；fw_content.conf 删 meow_route、加 meow_audiod+meow_audio(md5 打包时填)
- 真机定位并修复 ALSA UAPI 两大坑(即 ncm 播放无声根因)：
  ① hw_params 须全放行初始化(mask 全 1/interval [0,UINT_MAX])，memset 0 interval
     等价只能取 0 → refine 必空 → HW_PARAMS 恒 EINVAL
  ② access/format mask 先清零再单点(pmask 只 OR)，全 1 被 choose 成 MMAP_INTERLEAVED
     → write() 恒 EINVAL
- 附带修复：dev_write fd<0 防日志风暴丢 PCM 限频日志；SDK state 解析 app_id 截空白；
  meow_ui.h 文档负错误码表述修正
- 验证：宿主 FILE sink 全 IPC 链+抢占+tone WAV 20/20，SDK 客户端 13/13；
  qemu-mipsel 同过；真机 tone 44.1k/96k 切率 written=played、underrun=0、日志完整
- meow_ui.a 53a3edd2 → ncm 重链 d2031829(已热更到卡)；launcher a2f932a1

patch_v2/sdk/build_sdk.sh

@@ -10,7 +10,7 @@ AR="${AR:-/usr/bin/ar}"   # 系统 GNU ar 即可归档 mipsel ELF 对象（架
 rm -f meow_ui.a *.o
 
 # -I../meow_launcherd：meow_notify_ipc.c 复用共享协议头 meow_ipc.h（同一份、杜绝两端漂移）
-OBJS="meow_ui_gfx meow_ui_log meow_ui_notify meow_notify_ipc meow_ui_img meow_ui_widget meow_ui_input meow_ui_theme meow_ui_ime meow_pinyin meow_ui_sys meow_ui_vol meow_ui_activity meow_ui_global meow_ui_dialog meow_ui_config meow_ui_draw meow_ui_view meow_ui_nav meow_ui_media stb_image"
+OBJS="meow_ui_gfx meow_ui_log meow_ui_notify meow_notify_ipc meow_ui_img meow_ui_widget meow_ui_input meow_ui_theme meow_ui_ime meow_pinyin meow_ui_sys meow_ui_vol meow_ui_activity meow_ui_global meow_ui_dialog meow_ui_config meow_ui_draw meow_ui_view meow_ui_nav meow_ui_media meow_ui_audio stb_image"
 CFLAGS="-Os -static -I$ROOT/patch_v2/meow_launcherd"
 for f in $OBJS; do
   echo "== cc $f =="