windows: write steam_appid.txt before starting (the cause of the Steam error box); start the server window minimized

Co-Authored-By: Claude Opus 5.5 <[email protected]>

windows/setup.ps1

@@ -199,7 +199,7 @@ Write-Host "      connect 127.0.0.1:$port      (on this PC)" -ForegroundColor Gr
 foreach ($ip in Get-LanIPv4) { Write-Host "      connect ${ip}:$port      (same house)" -ForegroundColor Green }
 if ($s.CS_PUBLIC_ADDR) { Write-Host "      connect $($s.CS_PUBLIC_ADDR)      (friends over the internet)" -ForegroundColor Green }
 Write-Host ''
-Write-Host "  The server runs in its own window. Close that window to stop it."
+Write-Host "  The server runs in its own window (minimized in the taskbar). Close that window to stop it."
 Write-Host "  Menu (start, stop, map, mode, bots, kill counter, ...): double-click cs.cmd in"
 Write-Host "    $Root"
 if ($repo -ine $Root -and -not $Yes) { Start-Process explorer.exe -ArgumentList "`"$Root`"" }