chore: import upstream snapshot with attribution

scripts/build.ps1

@@ -0,0 +1,180 @@
+#!/usr/bin/env pwsh
+<#
+.SYNOPSIS
+    Builds UniGetUI, produces the published output, and packages artifacts.
+
+.PARAMETER Configuration
+    Build configuration (Debug or Release). Default: Release.
+
+.PARAMETER Platform
+    Target platform. Default: x64.
+
+.PARAMETER OutputPath
+    Directory for final packaged artifacts (zip, installer). Default: ./output
+
+.PARAMETER SkipTests
+    Skip running dotnet test before build.
+
+.PARAMETER SkipInstaller
+    Skip building the Inno Setup installer.
+
+.PARAMETER Version
+    Version string to stamp into the build (e.g. "3.3.7"). If not provided,
+    the current version from SharedAssemblyInfo.cs is used.
+
+.PARAMETER MaxInstallerCompression
+    Use the strongest Inno Setup compression settings for the installer.
+#>
+[CmdletBinding()]
+param(
+    [string] $Configuration = "Release",
+    [string] $Platform = "x64",
+    [string] $OutputPath = (Join-Path $PSScriptRoot ".." "output"),
+    [switch] $SkipTests,
+    [switch] $SkipInstaller,
+    [switch] $MaxInstallerCompression,
+    [string] $Version
+)
+
+$ErrorActionPreference = 'Stop'
+
+$RepoRoot = Resolve-Path (Join-Path $PSScriptRoot "..")
+$SrcDir = Join-Path $RepoRoot "src"
+$WindowsSolution = Join-Path $SrcDir "UniGetUI.Windows.slnx"
+$PublishProject = Join-Path $SrcDir "UniGetUI.Avalonia" "UniGetUI.Avalonia.csproj"
+$BinDir = Join-Path $RepoRoot "unigetui_bin"
+$BuildPropsPath = Join-Path $SrcDir "Directory.Build.props"
+[xml] $BuildProps = Get-Content $BuildPropsPath
+$PortableTargetFramework = @($BuildProps.Project.PropertyGroup | Where-Object { $_.PortableTargetFramework } | Select-Object -First 1).PortableTargetFramework
+$WindowsTargetPlatformVersion = @($BuildProps.Project.PropertyGroup | Where-Object { $_.WindowsTargetPlatformVersion } | Select-Object -First 1).WindowsTargetPlatformVersion
+
+if ([string]::IsNullOrWhiteSpace($PortableTargetFramework) -or [string]::IsNullOrWhiteSpace($WindowsTargetPlatformVersion)) {
+    throw "Could not resolve the target framework from $BuildPropsPath"
+}
+
+$TargetFramework = "$PortableTargetFramework-windows$WindowsTargetPlatformVersion"
+$PublishDir = Join-Path $SrcDir "UniGetUI.Avalonia" "bin" $Platform $Configuration $TargetFramework "win-$Platform" "publish"
+
+# --- Version stamping ---
+if ($Version) {
+    Write-Host "Stamping version: $Version"
+    & (Join-Path $PSScriptRoot "set-version.ps1") -Version $Version
+}
+
+# --- Read version from SharedAssemblyInfo.cs ---
+$AssemblyInfoPath = Join-Path $SrcDir "SharedAssemblyInfo.cs"
+$VersionMatch = Select-String -Path $AssemblyInfoPath -Pattern 'AssemblyInformationalVersion\("([^"]+)"\)'
+$PackageVersion = if ($VersionMatch) { $VersionMatch.Matches[0].Groups[1].Value } else { "0.0.0" }
+Write-Host "Building UniGetUI version: $PackageVersion"
+
+# --- Test ---
+if (-not $SkipTests) {
+    Write-Host "`n=== Running tests ===" -ForegroundColor Cyan
+    dotnet test $WindowsSolution --verbosity q --nologo --ignore-failed-sources /p:Platform=$Platform
+    if ($LASTEXITCODE -ne 0) {
+        throw "Tests failed with exit code $LASTEXITCODE"
+    }
+}
+
+# --- Build / Publish ---
+Write-Host "`n=== Publishing $Configuration|$Platform ===" -ForegroundColor Cyan
+dotnet clean $WindowsSolution -v m --nologo /p:Platform=$Platform
+
+dotnet publish $PublishProject /noLogo /p:Configuration=$Configuration /p:Platform=$Platform -p:RuntimeIdentifier=win-$Platform --ignore-failed-sources -v m
+if ($LASTEXITCODE -ne 0) {
+    throw "dotnet publish Avalonia failed with exit code $LASTEXITCODE"
+}
+
+# --- Stage binaries ---
+if (Test-Path $BinDir) { Remove-Item $BinDir -Recurse -Force }
+New-Item $BinDir -ItemType Directory | Out-Null
+# Move published output into unigetui_bin
+Get-ChildItem $PublishDir | Move-Item -Destination $BinDir -Force
+
+$WindowsAppHostPath = Join-Path $BinDir "UniGetUI.exe"
+if (-not (Test-Path $WindowsAppHostPath)) {
+    throw "Windows app host was not produced at $WindowsAppHostPath"
+}
+
+# Keep smaller symbols for useful local crash source information, and prune oversized ones.
+$MaxShippedPdbSizeBytes = 1MB
+
+$PdbsToRemove = Get-ChildItem $BinDir -Filter "*.pdb" -File | Where-Object {
+    $_.Length -gt $MaxShippedPdbSizeBytes
+}
+
+if ($PdbsToRemove.Count -gt 0) {
+    $RemovedPdbBytes = ($PdbsToRemove | Measure-Object -Property Length -Sum).Sum
+    $PdbsToRemove | Remove-Item -Force
+    Write-Host ("Removed {0} oversized PDBs above {1:N2} MiB ({2:N2} MiB total)." -f $PdbsToRemove.Count, ($MaxShippedPdbSizeBytes / 1MB), ($RemovedPdbBytes / 1MB))
+}
+
+# --- Package output ---
+if (Test-Path $OutputPath) { Remove-Item $OutputPath -Recurse -Force }
+New-Item $OutputPath -ItemType Directory | Out-Null
+
+$ZipPath = Join-Path $OutputPath "UniGetUI.$Platform.zip"
+Write-Host "`n=== Refreshing integrity tree before zip packaging ===" -ForegroundColor Cyan
+& (Join-Path $PSScriptRoot "refresh-integrity-tree.ps1") -Path $BinDir -FailOnUnexpectedFiles
+
+Write-Host "`n=== Creating zip: $ZipPath ===" -ForegroundColor Cyan
+Compress-Archive -Path (Join-Path $BinDir "*") -DestinationPath $ZipPath -CompressionLevel Optimal
+
+# --- Installer (Inno Setup) ---
+if (-not $SkipInstaller) {
+    $IsccPath = $null
+    # Search common install locations
+    foreach ($candidate in @(
+        "${env:ProgramFiles(x86)}\Inno Setup 6\ISCC.exe",
+        "$env:ProgramFiles\Inno Setup 6\ISCC.exe",
+        "$env:LOCALAPPDATA\Programs\Inno Setup 6\ISCC.exe"
+    )) {
+        if (Test-Path $candidate) { $IsccPath = $candidate; break }
+    }
+
+    if ($IsccPath) {
+        Write-Host "`n=== Building installer ===" -ForegroundColor Cyan
+        $InstallerBaseName = "UniGetUI.Installer.$Platform"
+        $IssPath = Join-Path $RepoRoot "UniGetUI.iss"
+        $IssContent = Get-Content $IssPath -Raw
+
+        Write-Host "`n=== Refreshing integrity tree before installer packaging ===" -ForegroundColor Cyan
+        & (Join-Path $PSScriptRoot "refresh-integrity-tree.ps1") -Path $BinDir -FailOnUnexpectedFiles
+
+        try {
+            $IssContentNoSign = $IssContent -Replace '(?m)^SignTool=.*$', '; SignTool=azsign (disabled for local build)'
+            $IssContentNoSign = $IssContentNoSign -Replace '(?m)^SignedUninstaller=yes', 'SignedUninstaller=no'
+            Set-Content $IssPath $IssContentNoSign -NoNewline
+
+            $IsccArgs = @($IssPath, "/F$InstallerBaseName", "/O$OutputPath")
+            if ($MaxInstallerCompression) {
+                Write-Host "Using lzma/ultra64 installer compression."
+                $IsccArgs = @('/DInstallerCompression=lzma/ultra64') + $IsccArgs
+            }
+
+            & $IsccPath @IsccArgs
+            if ($LASTEXITCODE -ne 0) {
+                throw "Inno Setup failed with exit code $LASTEXITCODE"
+            }
+        }
+        finally {
+            Set-Content $IssPath $IssContent -NoNewline
+        }
+    } else {
+        Write-Warning "Inno Setup 6 (ISCC.exe) not found — skipping installer build."
+    }
+}
+
+# --- Checksums ---
+Write-Host "`n=== Checksums ===" -ForegroundColor Cyan
+$ChecksumFile = Join-Path $OutputPath "checksums.$Platform.txt"
+Get-ChildItem $OutputPath -File | Where-Object { $_.Name -notlike "checksums.*.txt" } | ForEach-Object {
+    $hash = (Get-FileHash $_.FullName -Algorithm SHA256).Hash
+    "$hash  $($_.Name)" | Tee-Object -FilePath $ChecksumFile -Append
+}
+
+# --- Cleanup ---
+if (Test-Path $BinDir) { Remove-Item $BinDir -Recurse -Force }
+
+Write-Host "`n=== Build complete ===" -ForegroundColor Green
+Write-Host "Artifacts in: $OutputPath"