fix: 异步播放提示音，防止阻塞

examples/stereo/src/app/slave.rs

@@ -9,7 +9,6 @@ use crate::net::protocol::{AudioPacket, ChannelRole, ControlPacket};
 use crate::utils::jitter_buffer::JitterBuffer;
 use crate::utils::sync::{ClockSync, now_us};
 use anyhow::{Result, anyhow};
-use std::process::Command;
 use std::sync::Arc;
 use std::time::Duration;
 use tokio::io::{AsyncReadExt, AsyncWriteExt};
@@ -133,13 +132,17 @@ async fn handle_connection(role: ChannelRole) -> Result<()> {
 
     // 8. 播放主循环
     println!("✅ 主节点已连接，音频串流中...");
-    let _ = Command::new("sh")
-        .arg("-c")
-        .arg(format!(
-            "/usr/sbin/tts_play.sh \"主节点已连接，{}\" >/dev/null 2>&1",
-            role.to_string()
-        ))
-        .status();
+    let role_str = role.to_string();
+    tokio::spawn(async move {
+        let _ = tokio::process::Command::new("sh")
+            .arg("-c")
+            .arg(format!(
+                "/usr/sbin/tts_play.sh \"主节点已连接，{}\" >/dev/null 2>&1",
+                role_str
+            ))
+            .status()
+            .await;
+    });
 
     let mut pcm_buf = vec![0i16; config.frame_size];
     let mut last_seq: Option<u32> = None;