fix: harden service websocket reconnect flows

Stabilize the service console and callback-host websocket paths so idle disconnects and mid-task client drops no longer wedge task execution or spam repeated commands.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/service_ws_session_test.rs

@@ -213,6 +213,7 @@ fn start_callback_host_hotlist_browser_server(
             .to_string();
         let helper_client = Client::builder()
             .timeout(Duration::from_secs(2))
+            .pool_max_idle_per_host(0)
             .build()
             .unwrap();
         let helper_html = helper_client
@@ -264,14 +265,18 @@ fn start_callback_host_hotlist_browser_server(
         let mut saw_eval = false;
 
         while Instant::now() < deadline {
-            let envelope: Value = helper_client
+            let envelope: Value = match helper_client
                 .get(format!("{helper_origin}/sgclaw/callback/commands/next"))
                 .send()
-                .unwrap()
-                .error_for_status()
-                .unwrap()
-                .json()
-                .unwrap();
+                .and_then(|response| response.error_for_status())
+                .and_then(|response| response.json())
+            {
+                Ok(envelope) => envelope,
+                Err(_) => {
+                    thread::sleep(Duration::from_millis(20));
+                    continue;
+                }
+            };
             let Some(command) = envelope.get("command").and_then(Value::as_object) else {
                 thread::sleep(Duration::from_millis(20));
                 continue;
@@ -737,7 +742,7 @@ fn service_binary_survives_real_client_disconnect_after_task_complete() {
     .stderr(std::process::Stdio::piped())
     .spawn()
     .unwrap();
-    client.stdin.as_mut().unwrap().write_all("   \n".as_bytes()).unwrap();
+    client.stdin.as_mut().unwrap().write_all("你好\n".as_bytes()).unwrap();
     let client_output = client.wait_with_output().unwrap();
 
     assert!(
@@ -747,7 +752,7 @@ fn service_binary_survives_real_client_disconnect_after_task_complete() {
         String::from_utf8_lossy(&client_output.stderr)
     );
     assert!(
-        String::from_utf8_lossy(&client_output.stdout).contains("请输入任务内容。"),
+        String::from_utf8_lossy(&client_output.stdout).contains("任务执行失败:"),
         "client did not receive TaskComplete summary: stdout={} stderr={}",
         String::from_utf8_lossy(&client_output.stdout),
         String::from_utf8_lossy(&client_output.stderr)
@@ -1282,6 +1287,105 @@ fn service_binary_accepts_connect_request_without_starting_browser_task() {
     );
 }
 
+#[test]
+fn service_binary_survives_client_disconnect_during_task_completion_send() {
+    let service_listener = TcpListener::bind("127.0.0.1:0").unwrap();
+    let service_addr = service_listener.local_addr().unwrap();
+    drop(service_listener);
+
+    let root = std::env::temp_dir().join(format!("sgclaw-service-disconnect-{}", uuid::Uuid::new_v4()));
+    std::fs::create_dir_all(&root).unwrap();
+    let config_path = root.join("sgclaw_config.json");
+    std::fs::write(
+        &config_path,
+        format!(
+            r#"{{
+  "apiKey": "sk-runtime",
+  "baseUrl": "https://api.deepseek.com",
+  "model": "deepseek-chat",
+  "browserWsUrl": "ws://127.0.0.1:12345",
+  "serviceWsListenAddr": "{service_addr}"
+}}"#
+        ),
+    )
+    .unwrap();
+
+    let mut service = std::process::Command::new(
+        std::env::var("CARGO_BIN_EXE_sg_claw").expect("sg_claw test binary path"),
+    )
+    .env("SGCLAW_DISABLE_POST_EXPORT_OPEN", "1")
+    .arg("--config-path")
+    .arg(&config_path)
+    .stdout(std::process::Stdio::null())
+    .stderr(std::process::Stdio::piped())
+    .spawn()
+    .unwrap();
+
+    let ws_url = format!("ws://{service_addr}");
+    let connect_deadline = Instant::now() + Duration::from_secs(2);
+    let mut websocket = None;
+    while Instant::now() < connect_deadline {
+        match connect(ws_url.as_str()) {
+            Ok((socket, _)) => {
+                websocket = Some(socket);
+                break;
+            }
+            Err(_) => {
+                if service.try_wait().unwrap().is_some() {
+                    break;
+                }
+                thread::sleep(Duration::from_millis(50));
+            }
+        }
+    }
+
+    let mut websocket = websocket.expect("service ws listener never became available");
+    websocket
+        .send(Message::Text(
+            serde_json::to_string(&ClientMessage::SubmitTask {
+                instruction: "你好".to_string(),
+                conversation_id: String::new(),
+                messages: vec![],
+                page_url: String::new(),
+                page_title: String::new(),
+            })
+            .unwrap()
+            .into(),
+        ))
+        .unwrap();
+    drop(websocket);
+
+    let exit_deadline = Instant::now() + Duration::from_secs(1);
+    let mut service_status = None;
+    while Instant::now() < exit_deadline {
+        if let Some(status) = service.try_wait().unwrap() {
+            service_status = Some(status);
+            break;
+        }
+        thread::sleep(Duration::from_millis(20));
+    }
+    if service_status.is_none() {
+        service.kill().unwrap();
+        let _ = service.wait();
+    }
+
+    let stderr = service
+        .stderr
+        .take()
+        .map(|mut stream| {
+            let mut buf = Vec::new();
+            use std::io::Read;
+            let _ = stream.read_to_end(&mut buf);
+            String::from_utf8_lossy(&buf).into_owned()
+        })
+        .unwrap_or_default();
+
+    assert!(
+        service_status.is_none(),
+        "sg_claw exited after client disconnected mid-task; stderr={stderr}"
+    );
+}
+
 #[test]
 fn submit_task_client_message_converts_into_shared_runner_request() {
     let message = ClientMessage::SubmitTask {
@@ -1333,6 +1437,28 @@ fn lifecycle_client_messages_round_trip_with_stable_tags() {
     }
 }
 
+#[test]
+fn service_messages_round_trip_with_stable_tags() {
+    let cases = [
+        (
+            ServiceMessage::StatusChanged {
+                state: "started".to_string(),
+            },
+            r#"{"type":"status_changed","state":"started"}"#,
+        ),
+        (
+            ServiceMessage::Pong,
+            r#"{"type":"pong"}"#,
+        ),
+    ];
+
+    for (message, raw) in cases {
+        assert_eq!(serde_json::to_string(&message).unwrap(), raw);
+        let decoded: ServiceMessage = serde_json::from_str(raw).unwrap();
+        assert_eq!(decoded, message);
+    }
+}
+
 #[test]
 fn service_event_sink_maps_log_completion_and_status_messages() {
     let sink = ServiceEventSink::default();