修复打包脚本

tools/build-release.ps1

@@ -1,4 +1,4 @@
-param(
+param(
     # 不传时自动从 XplorePlane.csproj 的 <Version> 读取，传入则覆盖工程配置（用于临时测试版本号）
     [string]$Version,
 
@@ -61,8 +61,16 @@ Write-Host "========================================================" -Foregroun
 Write-Host ""
 
 # Step 1: Clean
-Write-Host "[1/5] Cleaning publish directory..." -ForegroundColor Yellow
-if (Test-Path $PublishDir) { Remove-Item $PublishDir -Recurse -Force }
+# 仅在即将重新构建时清理 publish 目录：-SkipBuild 场景下需要复用已有的发布产物
+# （例如仅因 vpk 打包阶段文件占用失败而重试），此前无条件清理会导致 -SkipBuild
+# 传入后必然因目录被清空而报错，参数形同虚设。
+if (-not $SkipBuild) {
+
+    Write-Host "[1/5] Cleaning publish directory..." -ForegroundColor Yellow
+    if (Test-Path $PublishDir) { Remove-Item $PublishDir -Recurse -Force }
+} else {
+    Write-Host "[1/5] Skipped clean (-SkipBuild, reusing existing publish directory)" -ForegroundColor DarkGray
+}
 
 # Step 2: Build and Publish
 if (-not $SkipBuild) {
@@ -152,6 +160,14 @@ if (-not $vpkCmd) {
         Write-Host "FAILED: vpk install failed" -ForegroundColor Red
         exit 1
     }
+    # 当前 PowerShell 进程的 PATH 可能尚未包含全局工具目录，安装后重新解析一次。
+    $vpkCmd = Get-Command vpk -ErrorAction SilentlyContinue
+}
+
+$vpkPath = if ($vpkCmd) { $vpkCmd.Source } else { Join-Path $HOME ".dotnet\tools\vpk.exe" }
+if (-not (Test-Path -LiteralPath $vpkPath)) {
+    Write-Host "FAILED: vpk executable not found: $vpkPath" -ForegroundColor Red
+    exit 1
 }
 
 if (-not $NoMsi) {
@@ -165,7 +181,8 @@ $vpkArgs = @(
     "--packAuthors", $PackAuthors,
     "--packVersion", $Version,
     "--packDir", $PublishDir,
-    "--mainExe", $MainExe
+    "--mainExe", $MainExe,
+    "--outputDir", $ReleasesDir
 )
 
 if (-not $NoMsi) {
@@ -176,7 +193,7 @@ if (-not $NoMsi) {
     $vpkArgs += $InstallLocation
 }
 
-& vpk @vpkArgs
+& $vpkPath @vpkArgs
 if ($LASTEXITCODE -ne 0) {
     Write-Host "FAILED: vpk pack failed!" -ForegroundColor Red
     exit 1