ci: build Windows release package

scripts/package-windows-release.ps1

@@ -0,0 +1,59 @@
+param(
+    [ValidateSet("msvc")]
+    [string]$Toolchain = "msvc",
+    [string]$BuildDir = "$PSScriptRoot\..\build-windows",
+    [string]$DistDir = "$PSScriptRoot\..\dist-windows"
+)
+
+$ErrorActionPreference = "Stop"
+
+$ProjectRoot = Resolve-Path "$PSScriptRoot\.."
+$BuildDir = [System.IO.Path]::GetFullPath($BuildDir)
+$DistDir = [System.IO.Path]::GetFullPath($DistDir)
+$PackageName = "chengnan-windows-x86_64"
+$PackageDir = Join-Path $DistDir $PackageName
+$ZipPath = Join-Path $DistDir "$PackageName.zip"
+$HashPath = "$ZipPath.sha256"
+
+Write-Host "[package] ProjectRoot: $ProjectRoot"
+Write-Host "[package] BuildDir:    $BuildDir"
+Write-Host "[package] DistDir:     $DistDir"
+
+& "$ProjectRoot\docs\windows\build-windows.ps1" -Toolchain $Toolchain -BuildDir $BuildDir -Deploy
+
+$DeployDir = Join-Path $BuildDir "deploy"
+$Exe = Join-Path $DeployDir "chengnan.exe"
+if (!(Test-Path $Exe)) {
+    throw "未找到部署后的 Windows 可执行文件：$Exe"
+}
+
+if (Test-Path $PackageDir) { Remove-Item -Recurse -Force $PackageDir }
+if (Test-Path $ZipPath) { Remove-Item -Force $ZipPath }
+if (Test-Path $HashPath) { Remove-Item -Force $HashPath }
+New-Item -ItemType Directory -Force -Path $DistDir | Out-Null
+Copy-Item -Recurse -Force $DeployDir $PackageDir
+
+$ReadmePath = Join-Path $PackageDir "README.txt"
+@"
+chengnan Windows x86_64 发布包
+
+运行方式：
+1. 解压整个目录。
+2. 双击 chengnan.exe 运行。
+
+说明：
+- 本目录已包含 Qt 运行时和 OpenCV DLL。
+- 请不要只复制 chengnan.exe，需保留同目录 DLL 和 Qt plugins 子目录。
+"@ | Set-Content -Encoding UTF8 $ReadmePath
+
+Compress-Archive -Path (Join-Path $PackageDir "*") -DestinationPath $ZipPath -Force
+
+$Hash = Get-FileHash -Algorithm SHA256 $ZipPath
+"$($Hash.Hash.ToLower())  $(Split-Path -Leaf $ZipPath)" | Set-Content -Encoding ASCII $HashPath
+
+if (!(Test-Path $ZipPath) -or ((Get-Item $ZipPath).Length -le 0)) {
+    throw "发布包生成失败：$ZipPath"
+}
+
+Write-Host "[package] 发布包：$ZipPath"
+Write-Host "[package] 校验文件：$HashPath"