feat: support Linux headless HWPOD node

tools/hwlab-node.py

@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 # SPEC: PJ2026-010104 AI网关; PJ2026-010405 云端控制台。
 # Implementation reference: draft-2026-07-13-p0-cloud-console.
-"""面向 Windows HWPOD 的单文件 HWLAB 图形节点。
+"""跨 Windows GUI 与 Linux headless 的单文件 HWLAB HWPOD 节点。
 
 用户入口不接受命令行参数，也不依赖 HWLAB_* 环境变量。
 持久配置统一存放在 ~/.hwlab/，并由设置界面或受控部署管理。
@@ -24,6 +24,7 @@ import queue
 import random
 import re
 import shutil
+import signal
 import socket
 import ssl
 import struct
@@ -54,15 +55,16 @@ except Exception:  # pragma: no cover - import failure is reported in main.
 
 
 APP_VERSION = "0.1.3"
-NODE_VERSION = f"{APP_VERSION}-python-gui"
+NODE_VERSION = f"{APP_VERSION}-python"
 CONTRACT_VERSION = "hwpod-node-ops-v1"
 APP_NAME = "HWLAB Node"
 CONFIG_DIR = Path.home() / ".hwlab"
 LOG_DIR = CONFIG_DIR / "logs"
+STATE_DIR = CONFIG_DIR / "state"
 UPDATE_DIR = CONFIG_DIR / "update"
 CONFIG_PATH = CONFIG_DIR / "config.json"
-STATE_PATH = CONFIG_DIR / "state.json"
-OPERATION_LEDGER_PATH = CONFIG_DIR / "hwpod-operations.json"
+STATE_PATH = STATE_DIR / "node.json"
+OPERATION_LEDGER_PATH = STATE_DIR / "hwpod-operations.json"
 LOG_PATH = LOG_DIR / "hwlab-node.log"
 
 DEFAULT_CONFIG = {
@@ -101,6 +103,7 @@ SECRET_PATTERNS = [
 def ensure_dirs() -> None:
     CONFIG_DIR.mkdir(parents=True, exist_ok=True)
     LOG_DIR.mkdir(parents=True, exist_ok=True)
+    STATE_DIR.mkdir(parents=True, exist_ok=True)
     UPDATE_DIR.mkdir(parents=True, exist_ok=True)
 
 
@@ -1003,9 +1006,9 @@ class WebSocketNodeClient:
             "capabilities": self.executor.capabilities(),
             "maxInFlight": 1,
             "runtime": {
-                "kind": "python-tkinter-gui",
+                "kind": "python-tkinter-gui" if sys.platform == "win32" else "python-headless",
                 "installed": True,
-                "desktopVisible": True,
+                "desktopVisible": sys.platform == "win32",
                 "currentVersion": APP_VERSION,
                 "updateChannel": str(self.config.get("update", {}).get("channel") or "stable"),
             },
@@ -1807,12 +1810,52 @@ class HwlabNodeApp:
         self.root.mainloop()
 
 
+class HeadlessHwlabNodeApp:
+    def __init__(self):
+        ensure_dirs()
+        self.store = ConfigStore()
+        self.config = self.store.config
+        self.logger = setup_logger()
+        self.bus = UiEventBus()
+        install_exception_hooks(self.logger, self.bus)
+        self.executor = NodeOpsExecutor(self.config, self.logger)
+        self.client = WebSocketNodeClient(self.config, self.executor, self.logger, self.bus)
+        self.stop_event = threading.Event()
+
+    def stop(self, *_args) -> None:
+        self.stop_event.set()
+        self.client.stop()
+
+    def run(self) -> None:
+        if self.config.get("autoConnect") is not True:
+            raise RuntimeError("Linux headless mode requires autoConnect=true")
+        for name in ("SIGINT", "SIGTERM"):
+            signum = getattr(signal, name, None)
+            if signum is not None:
+                signal.signal(signum, self.stop)
+        self.logger.info("headless node starting: nodeId=%s config=%s", self.executor.node_id, CONFIG_PATH)
+        self.client.start()
+        while not self.stop_event.wait(0.25):
+            while True:
+                try:
+                    kind, payload = self.bus.queue.get_nowait()
+                except queue.Empty:
+                    break
+                if kind == "log":
+                    self.logger.info("%s", redact(payload))
+                elif kind == "connection":
+                    self.logger.info("connection state: %s", redact(payload))
+        if self.client.thread and self.client.thread.is_alive():
+            self.client.thread.join(timeout=5)
+        atomic_write_json(STATE_PATH, {"lastExitAt": utc_now(), "connectionState": "stopped", "runtimeKind": "python-headless"})
+
+
 def main() -> int:
     ensure_dirs()
     logger = setup_logger()
     install_exception_hooks(logger)
     try:
-        app = HwlabNodeApp()
+        app = HwlabNodeApp() if sys.platform == "win32" else HeadlessHwlabNodeApp()
         app.run()
         return 0
     except Exception as exc: