Cleanup Terminal Flags

synodic_client/application/screen/tool_update_controller.py

@@ -389,5 +389,3 @@ def _on_package_remove_finished(
             tools_view.set_package_removing(plugin_name, package_name, False)
             tools_view._updates_checked = False
             tools_view.refresh()
-
-        self._window.show()

tool/pyinstaller/rthook_no_console.py

@@ -3,8 +3,14 @@
 When the application is built as a windowed executable (``console=False``),
 every ``subprocess.Popen`` call that launches a console program (pip, pipx,
 uv, winget, etc.) would briefly flash a visible console window.  This hook
-merges ``CREATE_NO_WINDOW`` into *creationflags* for every call, suppressing
-those flashes while preserving any flags the caller already set.
+patches every ``subprocess.Popen`` call with two complementary mitigations:
+
+* ``CREATE_NO_WINDOW`` in *creationflags* — prevents Windows from allocating
+  a new console for the child process.
+* ``STARTUPINFO`` with ``STARTF_USESHOWWINDOW`` and ``wShowWindow=SW_HIDE``
+  — tells Windows to pass ``SW_HIDE`` as the initial ``nCmdShow`` to the
+  child, suppressing the brief window flash that some GUI-subsystem tools
+  (e.g. ``winget.exe``) produce even without a console.
 
 Placed as a runtime hook so the patch is active before any application or
 library code spawns subprocesses.
@@ -15,10 +21,22 @@
 from typing import Any
 
 if sys.platform == 'win32':
+    import subprocess as _sp
+
+    _SW_HIDE = 0
+    _STARTF_USESHOWWINDOW = _sp.STARTF_USESHOWWINDOW
+    _CREATE_NO_WINDOW = _sp.CREATE_NO_WINDOW
+
     _original_init = subprocess.Popen.__init__
 
     def _patched_init(self: subprocess.Popen, *args: Any, **kwargs: Any) -> None:
-        kwargs['creationflags'] = kwargs.get('creationflags', 0) | subprocess.CREATE_NO_WINDOW
+        kwargs['creationflags'] = kwargs.get('creationflags', 0) | _CREATE_NO_WINDOW
+
+        startupinfo = kwargs.get('startupinfo') or _sp.STARTUPINFO()
+        startupinfo.dwFlags |= _STARTF_USESHOWWINDOW
+        startupinfo.wShowWindow = _SW_HIDE
+        kwargs['startupinfo'] = startupinfo
+
         _original_init(self, *args, **kwargs)
 
     subprocess.Popen.__init__ = _patched_init