Remove dxwrapper; test scripts focus the game window

The default render size (1835x768) is below Direct3D 7's 2048 limit, so the
D3D7 -> D3D9 wrapper and its device-info workaround are no longer needed.
The game pauses start-up until its window is active; game-input.ps1 now
activates it reliably (Alt + SetForegroundWindow, polled), which dxwrapper
had masked. borderless logs the first failed presents.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

tools/game-input.ps1

@@ -19,13 +19,27 @@ Add-Type -Namespace SacredRe -Name Input -MemberDefinition @'
 
 $script:Root = Split-Path $PSScriptRoot
 
+# The game pauses its start-up until its window is active, and Windows does
+# not hand the foreground to a window started from a background process; a
+# synthetic Alt press lifts that restriction for SetForegroundWindow.
+function Focus-Sacred($Game) {
+    $Game.Refresh()
+    if ($Game.MainWindowHandle -eq [IntPtr]::Zero) { return $false }
+    [SacredRe.Input]::keybd_event(0x12, 0, 0, [UIntPtr]::Zero)
+    [SacredRe.Input]::keybd_event(0x12, 0, 2, [UIntPtr]::Zero)
+    [SacredRe.Input]::SetForegroundWindow($Game.MainWindowHandle)
+}
+
 function Start-Sacred([string]$Arguments = "log", [int]$WaitSeconds = 18) {
     if (Get-Process sacred -ErrorAction SilentlyContinue) { throw "sacred.exe is already running" }
     $null = Start-Process (Join-Path $script:Root "build\x86-debug\sacred_re.exe") -ArgumentList $Arguments
-    Start-Sleep $WaitSeconds
-    $game = Get-Process sacred -ErrorAction SilentlyContinue | Select-Object -First 1
-    if (-not $game) { throw "sacred.exe did not start (or crashed)" }
-    [SacredRe.Input]::SetForegroundWindow($game.MainWindowHandle) | Out-Null
+    $game = $null
+    for ($i = 0; $i -lt $WaitSeconds * 4; $i++) {
+        Start-Sleep -Milliseconds 250
+        if (-not $game) { $game = Get-Process sacred -ErrorAction SilentlyContinue | Select-Object -First 1 }
+        if ($game) { Focus-Sacred $game | Out-Null }
+    }
+    if (-not $game -or $game.HasExited) { throw "sacred.exe did not start (or crashed)" }
     $game
 }