fix(debug-ipc): 修复连接生命周期和完整帧写入

区分 IPC server 所有者与普通克隆，避免临时 clone 析构时提前停止共享服务。

改用带超时的阻塞 write_all 发送完整数据帧，防止非阻塞短写破坏热重载协议。

src/debug/ipc.rs

@@ -11,9 +11,18 @@ use std::{
 
 use crate::error::{CliError, Result};
 
-#[derive(Clone)]
 pub struct DebugIpcServer {
     inner: Arc<Inner>,
+    owns_lifecycle: bool,
+}
+
+impl Clone for DebugIpcServer {
+    fn clone(&self) -> Self {
+        Self {
+            inner: Arc::clone(&self.inner),
+            owns_lifecycle: false,
+        }
+    }
 }
 
 struct Inner {
@@ -39,7 +48,10 @@ impl DebugIpcServer {
         let handle = thread::spawn(move || accept_loop(listener, thread_inner));
         *inner.thread.lock().unwrap() = Some(handle);
 
-        Ok(Self { inner })
+        Ok(Self {
+            inner,
+            owns_lifecycle: true,
+        })
     }
 
     pub fn port(&self) -> u16 {
@@ -50,12 +62,11 @@ impl DebugIpcServer {
         let frame = encode_frame(message_type, payload)?;
         let mut clients = self.inner.clients.lock().unwrap();
         let mut any = false;
-        clients.retain_mut(|stream| match stream.write(&frame) {
-            Ok(_) => {
+        clients.retain_mut(|stream| match stream.write_all(&frame) {
+            Ok(()) => {
                 any = true;
                 true
             }
-            Err(err) if err.kind() == io::ErrorKind::WouldBlock => true,
             Err(_) => false,
         });
         Ok(any)
@@ -81,7 +92,9 @@ impl DebugIpcServer {
 
 impl Drop for DebugIpcServer {
     fn drop(&mut self) {
-        self.stop();
+        if self.owns_lifecycle {
+            self.stop();
+        }
     }
 }
 
@@ -99,8 +112,12 @@ fn accept_loop(listener: TcpListener, inner: Arc<Inner>) {
     while !inner.stop.load(Ordering::Relaxed) {
         match listener.accept() {
             Ok((stream, _)) => {
-                let _ = stream.set_nonblocking(true);
-                inner.clients.lock().unwrap().push(stream);
+                if stream
+                    .set_write_timeout(Some(Duration::from_secs(1)))
+                    .is_ok()
+                {
+                    inner.clients.lock().unwrap().push(stream);
+                }
             }
             Err(err) if err.kind() == io::ErrorKind::WouldBlock => {
                 thread::sleep(Duration::from_millis(50));
@@ -112,7 +129,7 @@ fn accept_loop(listener: TcpListener, inner: Arc<Inner>) {
 
 #[cfg(test)]
 mod tests {
-    use super::encode_frame;
+    use super::{DebugIpcServer, encode_frame};
 
     #[test]
     fn encodes_big_endian_ipc_frame() {
@@ -120,4 +137,15 @@ mod tests {
         assert_eq!(&frame[..6], &[0, 2, 0, 0, 0, 7]);
         assert_eq!(&frame[6..], b"[\"a.b\"]");
     }
+
+    #[test]
+    fn dropping_clone_keeps_server_running() {
+        let server = DebugIpcServer::start().unwrap();
+        let port = server.port();
+
+        drop(server.clone());
+
+        assert_eq!(server.port(), port);
+        server.safe_exit();
+    }
 }