Add hidden startup launchers for backend and overlay

pc/install_startup_shortcut.ps1

@@ -0,0 +1,47 @@
+[CmdletBinding(SupportsShouldProcess = $true)]
+param(
+    [switch]$Remove,
+    [switch]$AllUsers
+)
+
+$ErrorActionPreference = "Stop"
+
+$scriptDir = Split-Path -Parent $PSCommandPath
+$vbsLauncher = Join-Path $scriptDir "start_streamdeck_hidden.vbs"
+$shortcutName = "Custom Streamdeck Launcher.lnk"
+
+if (-not (Test-Path $vbsLauncher)) {
+    throw "Launcher file not found: $vbsLauncher"
+}
+
+$startupFolder = if ($AllUsers) {
+    [Environment]::GetFolderPath("CommonStartup")
+} else {
+    [Environment]::GetFolderPath("Startup")
+}
+
+$shortcutPath = Join-Path $startupFolder $shortcutName
+
+if ($Remove) {
+    if (Test-Path $shortcutPath) {
+        if ($PSCmdlet.ShouldProcess($shortcutPath, "Remove startup shortcut")) {
+            Remove-Item -LiteralPath $shortcutPath -Force
+            Write-Host "Removed startup shortcut: $shortcutPath"
+        }
+    } else {
+        Write-Host "No startup shortcut found at: $shortcutPath"
+    }
+    return
+}
+
+if ($PSCmdlet.ShouldProcess($shortcutPath, "Create startup shortcut")) {
+    $shell = New-Object -ComObject WScript.Shell
+    $shortcut = $shell.CreateShortcut($shortcutPath)
+    $shortcut.TargetPath = "$env:SystemRoot\System32\wscript.exe"
+    $shortcut.Arguments = '"' + $vbsLauncher + '"'
+    $shortcut.WorkingDirectory = $scriptDir
+    $shortcut.Description = "Launch Custom Streamdeck backend and overlay hidden at sign-in."
+    $shortcut.Save()
+
+    Write-Host "Created startup shortcut: $shortcutPath"
+}

pc/start_streamdeck.ps1

@@ -0,0 +1,128 @@
+param(
+    [switch]$DryRun
+)
+
+$ErrorActionPreference = "Stop"
+
+$repoRoot = Split-Path -Parent $PSScriptRoot
+$overlayDir = Join-Path $repoRoot "overlay"
+$dataDir = Join-Path $repoRoot "data"
+$launcherLog = Join-Path $dataDir "startup-launcher.log"
+
+if (-not (Test-Path $dataDir)) {
+    New-Item -ItemType Directory -Path $dataDir | Out-Null
+}
+
+function Write-LauncherLog {
+    param([string]$Message)
+    $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
+    Add-Content -Path $launcherLog -Value "[$timestamp] $Message"
+}
+
+function Resolve-PythonPath {
+    $venvPython = Join-Path $repoRoot ".venv\Scripts\python.exe"
+    if (Test-Path $venvPython) {
+        return $venvPython
+    }
+
+    $pythonCmd = Get-Command python -ErrorAction SilentlyContinue
+    if ($null -ne $pythonCmd) {
+        return $pythonCmd.Source
+    }
+
+    throw "Could not find Python. Install Python or create .venv first."
+}
+
+function Resolve-NpmPath {
+    $npmCmd = Get-Command npm.cmd -ErrorAction SilentlyContinue
+    if ($null -ne $npmCmd) {
+        return $npmCmd.Source
+    }
+
+    throw "Could not find npm.cmd. Install Node.js/npm first."
+}
+
+function Start-HiddenProcess {
+    param(
+        [string]$Name,
+        [string]$FilePath,
+        [string[]]$Arguments,
+        [string]$WorkingDirectory,
+        [string]$StdOutPath,
+        [string]$StdErrPath
+    )
+
+    if ($DryRun) {
+        Write-LauncherLog "DRY RUN -> $Name | $FilePath $($Arguments -join ' ')"
+        return
+    }
+
+    Start-Process `
+        -FilePath $FilePath `
+        -ArgumentList $Arguments `
+        -WorkingDirectory $WorkingDirectory `
+        -WindowStyle Hidden `
+        -RedirectStandardOutput $StdOutPath `
+        -RedirectStandardError $StdErrPath | Out-Null
+
+    Write-LauncherLog "Started $Name."
+}
+
+function Is-BackendRunning {
+    $matches = Get-CimInstance Win32_Process -ErrorAction SilentlyContinue |
+        Where-Object {
+            $_.Name -like "python*" -and
+            $_.CommandLine -and
+            $_.CommandLine -like "*backend.main:app*"
+        }
+    return ($matches | Measure-Object).Count -gt 0
+}
+
+function Is-OverlayRunning {
+    $matches = Get-CimInstance Win32_Process -ErrorAction SilentlyContinue |
+        Where-Object {
+            $_.CommandLine -and
+            $_.CommandLine -like "*custom-streamdeck*overlay*"
+        }
+    return ($matches | Measure-Object).Count -gt 0
+}
+
+try {
+    $pythonPath = Resolve-PythonPath
+    $npmPath = Resolve-NpmPath
+
+    if (-not (Test-Path (Join-Path $repoRoot "frontend\dist\index.html"))) {
+        Write-LauncherLog "Warning: frontend/dist is missing. Build frontend for production view."
+    }
+
+    if (Is-BackendRunning) {
+        Write-LauncherLog "Backend already running. Skipping backend launch."
+    } else {
+        $backendOut = Join-Path $dataDir "backend.stdout.log"
+        $backendErr = Join-Path $dataDir "backend.stderr.log"
+        Start-HiddenProcess `
+            -Name "backend" `
+            -FilePath $pythonPath `
+            -Arguments @("-m", "uvicorn", "backend.main:app", "--host", "127.0.0.1", "--port", "8000") `
+            -WorkingDirectory $repoRoot `
+            -StdOutPath $backendOut `
+            -StdErrPath $backendErr
+    }
+
+    if (Is-OverlayRunning) {
+        Write-LauncherLog "Overlay already running. Skipping overlay launch."
+    } else {
+        $overlayOut = Join-Path $dataDir "overlay.stdout.log"
+        $overlayErr = Join-Path $dataDir "overlay.stderr.log"
+        Start-HiddenProcess `
+            -Name "overlay" `
+            -FilePath $npmPath `
+            -Arguments @("run", "start") `
+            -WorkingDirectory $overlayDir `
+            -StdOutPath $overlayOut `
+            -StdErrPath $overlayErr
+    }
+} catch {
+    Write-LauncherLog "Launcher failed: $($_.Exception.Message)"
+    throw
+}

pc/start_streamdeck_hidden.vbs

@@ -0,0 +1,11 @@
+Option Explicit
+
+Dim shell, fso, scriptDir, psScript, command
+Set shell = CreateObject("WScript.Shell")
+Set fso = CreateObject("Scripting.FileSystemObject")
+
+scriptDir = fso.GetParentFolderName(WScript.ScriptFullName)
+psScript = """" & fso.BuildPath(scriptDir, "start_streamdeck.ps1") & """"
+
+command = "powershell.exe -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -File " & psScript
+shell.Run command, 0, False