FIX: windowed app (console=False) sys.stderr=None -> uvicorn logging crash isatty — thay bang devnull

desktop_engine.py

@@ -37,6 +37,16 @@ def _parent_alive(pid):
 
 def main():
     os.environ.setdefault("SF_DESKTOP", "1")
+
+    # Windowed app (engine.spec console=False): Windows khong tao console ->
+    # sys.stdout/sys.stderr = None -> uvicorn logging crash
+    # ('NoneType' object has no attribute 'isatty'). Thay bang file rong de
+    # uvicorn (StreamHandler/isatty) luon co stream hop le.
+    if sys.stdout is None:
+        sys.stdout = open(os.devnull, "w")
+    if sys.stderr is None:
+        sys.stderr = open(os.devnull, "w")
+
     port = _pick_port()
     os.environ["SF_PORT"] = str(port)