fix: notifications hanging

guest_server/install.bat

@@ -2,6 +2,7 @@
 set INSTALL_DIR=C:\Program Files\WinBoat
 set EXE_PATH=%INSTALL_DIR%\winboat_guest_server.exe
 set TIME_SYNC_SCRIPT_PATH=%INSTALL_DIR%\scripts\time-sync.bat
+set NOTIFICATIONS_SCRIPT_PATH=%INSTALL_DIR%\scripts\notifications_cleanup.ps1
 set NSSM_PATH=%INSTALL_DIR%\nssm.exe
 set OEM_DIR=C:\OEM
 
@@ -28,4 +29,5 @@ netsh advfirewall firewall add rule name="Allow WinBoat API 7148" dir=in action=
 "%NSSM_PATH%" start WinBoatGuestServer
 
 :: Startup Tasks
-schtasks /create /tn "TimeSyncTask" /sc ONSTART /RL HIGHEST /tr "\"%TIME_SYNC_SCRIPT_PATH%\"" /RU SYSTEM
+schtasks /create /tn "TimeSyncTask" /sc ONSTART /RL HIGHEST /tr "\"%TIME_SYNC_SCRIPT_PATH%\"" /RU SYSTEM
+reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "NotificationCleanup" /t REG_SZ /d "conhost --headless powershell.exe -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -File \"%NOTIFICATIONS_SCRIPT_PATH%\"" /f

guest_server/scripts/notifications_cleanup.ps1

@@ -0,0 +1,64 @@
+if (-not (Get-WmiObject Win32_OperatingSystem).Caption -Match "Windows 11") {
+    exit
+}
+
+Add-Type @"
+using System;
+using System.Runtime.InteropServices;
+
+public class Win32 {
+    [StructLayout(LayoutKind.Sequential)]
+    public struct RECT {
+        public int Left;
+        public int Top;
+        public int Right;
+        public int Bottom;
+    }
+
+    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
+    public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
+
+    [DllImport("user32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    public static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);
+
+    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
+    public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
+}
+"@
+
+$hwnd_progman = [Win32]::FindWindow("Progman", "Program Manager")
+$hwnd_shell = [Win32]::FindWindowEx($hwnd_progman, [IntPtr]::Zero, "SHELLDLL_DefView", $null)
+
+if ($hwnd_shell -ne [IntPtr]::Zero) {
+    exit
+}
+
+$className = "Windows.UI.Core.CoreWindow"
+$caption = "New notification"
+
+$prev = 0;
+
+while ($true) {
+    $hwnd = [Win32]::FindWindow($className, $caption)
+
+    if ($hwnd -eq [IntPtr]::Zero) {
+        Start-Sleep -Milliseconds 100
+        continue
+    }
+
+    $rect = New-Object Win32+RECT
+
+    if ([Win32]::GetWindowRect($hwnd, [ref]$rect)) {
+        $width = $rect.Right - $rect.Left
+        $height = $rect.Bottom - $rect.Top
+
+        if ($height -eq 0 -and $prev -ne 0) {
+            Stop-Process -Name "ShellExperienceHost" -Force
+        }
+
+        $prev = $height;
+    }
+
+    Start-Sleep -Milliseconds 100
+}