feat: add seat firmware workbench and OTA delivery

tools/build_seat_firmware.ps1

@@ -4,7 +4,14 @@ param(
     [string]$Profile = 'combined',
     [string]$Configuration = 'rev_d',
     [string]$RepositoryRoot = '',
-    [string]$IarBuild = ''
+    [string]$IarBuild = '',
+    [string]$OutputDirectory = '',
+    [ValidateSet(0, 1)]
+    [int]$PositionControl = 1,
+    [ValidateSet(0, 1)]
+    [int]$Ventilation = 1,
+    [ValidateSet(0, 1)]
+    [int]$Heating = 1
 )
 
 $ErrorActionPreference = 'Stop'
@@ -69,9 +76,46 @@ function Write-ImageSummary {
     if (-not (Test-Path -LiteralPath $ImagePath -PathType Leaf)) {
         throw "Build completed but HEX image was not found: $ImagePath"
     }
-    $hash = Get-FileHash -LiteralPath $ImagePath -Algorithm SHA256
+    # Use the .NET primitive directly. Some locked-down PowerShell hosts do not
+    # expose Get-FileHash even though the Utility module is otherwise present.
+    $stream = [System.IO.File]::OpenRead($ImagePath)
+    try {
+        $algorithm = [System.Security.Cryptography.SHA256]::Create()
+        try {
+            $hashBytes = $algorithm.ComputeHash($stream)
+        }
+        finally {
+            $algorithm.Dispose()
+        }
+    }
+    finally {
+        $stream.Dispose()
+    }
+    $hashValue = [System.BitConverter]::ToString($hashBytes).Replace('-', '').ToLowerInvariant()
     Write-Host "Seat_Controller_demo HEX: $ImagePath"
-    Write-Host "Seat_Controller_demo SHA256: $($hash.Hash.ToLowerInvariant())"
+    Write-Host "Seat_Controller_demo SHA256: $hashValue"
+}
+
+function Copy-BuildArtifact {
+    param(
+        [string]$Source,
+        [string]$Destination
+    )
+
+    $lastError = $null
+    for ($attempt = 1; $attempt -le 6; $attempt++) {
+        try {
+            Copy-Item -LiteralPath $Source -Destination $Destination -Force
+            return
+        }
+        catch [System.IO.IOException] {
+            $lastError = $_
+            if ($attempt -lt 6) {
+                Start-Sleep -Milliseconds (150 * $attempt)
+            }
+        }
+    }
+    throw $lastError
 }
 
 # Preserve the IAR project's original ../../common and ../../tviibh8m layout
@@ -97,23 +141,46 @@ try {
     New-Item -ItemType Junction -Path (Join-Path $stagingRootFull 'common') -Target $vendorCommon | Out-Null
     New-Item -ItemType Junction -Path (Join-Path $stagingRootFull 'tviibh8m') -Target $vendorDevice | Out-Null
 
+    $featureProfilePath = Join-Path $stagingProjectRoot 'Config\seat_feature_profile.h'
+    $featureProfile = @"
+#ifndef SEAT_FEATURE_PROFILE_H
+#define SEAT_FEATURE_PROFILE_H
+
+/* Generated by tools/build_seat_firmware.ps1 for this build only. */
+#define SEAT_FEATURE_POSITION_CONTROL ($PositionControl)
+#define SEAT_FEATURE_VENTILATION      ($Ventilation)
+#define SEAT_FEATURE_HEATING          ($Heating)
+
+#endif /* SEAT_FEATURE_PROFILE_H */
+"@
+    [System.IO.File]::WriteAllText(
+        $featureProfilePath,
+        $featureProfile,
+        [System.Text.UTF8Encoding]::new($false)
+    )
+    Write-Host "Feature profile: position=$PositionControl ventilation=$Ventilation heating=$Heating"
+
     $stagedProject = Join-Path $stagingProjectRoot 'IAR\Seat_Controller_demo.ewp'
     Invoke-IarBuild -ProjectPath $stagedProject
 
     $stagedExe = Join-Path $stagingProjectRoot "IAR\$Configuration\Exe"
-    $repositoryExe = Join-Path $repositoryFirmware "IAR\$Configuration\Exe"
-    New-Item -ItemType Directory -Path $repositoryExe -Force | Out-Null
+    $artifactOutput = if ($OutputDirectory) {
+        [System.IO.Path]::GetFullPath($OutputDirectory)
+    } else {
+        Join-Path $repositoryFirmware "IAR\$Configuration\Exe"
+    }
+    New-Item -ItemType Directory -Path $artifactOutput -Force | Out-Null
     foreach ($artifact in @('Seat_Controller_demo.hex', 'Seat_Controller_demo.out')) {
         $sourceArtifact = Join-Path $stagedExe $artifact
         if (-not (Test-Path -LiteralPath $sourceArtifact -PathType Leaf)) {
             throw "IAR build did not produce $sourceArtifact"
         }
-        Copy-Item -LiteralPath $sourceArtifact -Destination (
-            Join-Path $repositoryExe $artifact
-        ) -Force
+        Copy-BuildArtifact -Source $sourceArtifact -Destination (
+            Join-Path $artifactOutput $artifact
+        )
     }
     Write-ImageSummary -ImagePath (
-        Join-Path $repositoryExe 'Seat_Controller_demo.hex'
+        Join-Path $artifactOutput 'Seat_Controller_demo.hex'
     )
 }
 finally {