Add Windows service host and system tray controller

uninstall_backend_service.ps1

@@ -0,0 +1,36 @@
+[CmdletBinding(SupportsShouldProcess = $true)]
+param(
+    [string]$ServiceName = "ScreenJobBackend"
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = "Stop"
+
+function Test-IsAdministrator {
+    $identity = [Security.Principal.WindowsIdentity]::GetCurrent()
+    $principal = New-Object Security.Principal.WindowsPrincipal($identity)
+    return $principal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
+}
+
+if (-not (Test-IsAdministrator)) {
+    throw "Run this script from an elevated PowerShell session (Run as Administrator)."
+}
+
+$service = Get-Service -Name $ServiceName -ErrorAction SilentlyContinue
+if ($null -eq $service) {
+    Write-Host "Service '$ServiceName' is not installed."
+    exit 0
+}
+
+if ($PSCmdlet.ShouldProcess($ServiceName, "Uninstall service")) {
+    if ($service.Status -ne "Stopped") {
+        Stop-Service -Name $ServiceName -Force -ErrorAction Stop
+    }
+
+    & sc.exe delete $ServiceName | Out-Null
+    if ($LASTEXITCODE -ne 0) {
+        throw "Failed to delete service '$ServiceName' (sc.exe exit code $LASTEXITCODE)."
+    }
+}
+
+Write-Host "Service '$ServiceName' uninstalled successfully." -ForegroundColor Green