ci(workflow): 移除 Windows 构建中的 Node.js 安装步骤并添加 runner 条件

.github/workflows/build-windows.yml

@@ -74,35 +74,11 @@ jobs:
   build:
     runs-on: windows-latest
     needs: build-libcore
-    # 新增：设置 job 级 PATH，让所有 steps 都能访问 Node.js
-    env:
-      PATH: ${{ github.workspace }}\node;${{ env.PATH }}
+    if: ${{ runner.os == 'Windows' }}
+    # 仅在真实 Windows runner 上执行此构建
 
     steps:
     # 新增：引导步骤，下载并设置 Node.js（便携版，无需全局安装）
-    - name: 🔧 Setup Node.js
-      shell: pwsh
-      run: |
-        $nodeVersion = "22.9.0"  # 可调整为其他 LTS 版本，如 "20.17.0"
-        $zipUrl = "https://nodejs.org/dist/v${nodeVersion}/node-v${nodeVersion}-win-x64.zip"
-        $zipPath = Join-Path $env:GITHUB_WORKSPACE "node.zip"
-        $nodeDir = Join-Path $env:GITHUB_WORKSPACE "node"
-        
-        # 创建目录
-        New-Item -ItemType Directory -Force -Path $nodeDir | Out-Null
-        
-        # 下载 ZIP
-        Write-Host "Downloading Node.js from $zipUrl"
-        Invoke-WebRequest -Uri $zipUrl -OutFile $zipPath
-        
-        # 解压
-        Expand-Archive -Path $zipPath -DestinationPath $nodeDir -Force
-        Remove-Item $zipPath
-        
-        # 验证（此时 PATH 已包含 $nodeDir，所以能直接调用）
-        Write-Host "Node.js version: $(& "$nodeDir\node.exe" --version)"
-        Write-Host "npm version: $(& "$nodeDir\npm.cmd" --version)"
-        Write-Host "Node.js installed to: $nodeDir"
 
     - name: 📥 Checkout 代码
       uses: actions/checkout@v4