Run Windows training agent without console

tools/install_windows_training_agent.ps1

@@ -40,6 +40,15 @@ function Resolve-Python {
     throw "Python was not found. Create .venv or install Python 3.12."
 }
 
+function Resolve-WindowlessPython {
+    $python = Resolve-Python
+    $pythonw = Join-Path (Split-Path -Parent $python) "pythonw.exe"
+    if (Test-Path $pythonw) {
+        return $pythonw
+    }
+    return $python
+}
+
 if ($ApiAuth) {
     [Environment]::SetEnvironmentVariable("TRADEBOT_API_AUTH", $ApiAuth, "User")
     $env:TRADEBOT_API_AUTH = $ApiAuth
@@ -59,7 +68,7 @@ if (-not $KeepLegacyRetrainer) {
     }
 }
 
-$python = Resolve-Python
+$python = Resolve-WindowlessPython
 $currentUser = [System.Security.Principal.WindowsIdentity]::GetCurrent().Name
 $arguments = @(
     "-u",