fix: address deploy review comments

.github/scripts/remote_windows_deploy.ps1

@@ -46,7 +46,7 @@ $BinDir = Join-Path $DeployRoot 'bin'
 $StartupScript = Join-Path $BinDir 'startup.bat'
 $ReleaseDir = Join-Path $DeployRoot 'releases'
 $DeployTmp = Join-Path $DeployRoot 'deploy-tmp'
-$BuildOutputDir = Join-Path $SourceRoot 'server\target'
+$BuildOutputDir = Join-Path (Join-Path $SourceRoot 'server') 'target'
 
 if (-not (Test-Path $DeployRoot)) {
     throw "Deploy root not found: $DeployRoot"
@@ -123,6 +123,28 @@ function Invoke-External {
     }
 }
 
+function Assert-SafeSourceRoot {
+    param([string]$PathToCheck)
+
+    $FullPath = [System.IO.Path]::GetFullPath($PathToCheck)
+    $RootPath = [System.IO.Path]::GetPathRoot($FullPath)
+    if ($FullPath.TrimEnd('\') -eq $RootPath.TrimEnd('\')) {
+        throw "Refusing to use drive root as source root: $FullPath"
+    }
+
+    $DangerousLeafNames = @(
+        'Windows',
+        'Users',
+        'Program Files',
+        'Program Files (x86)',
+        'ProgramData'
+    )
+    $LeafName = Split-Path -Leaf $FullPath.TrimEnd('\')
+    if ($DangerousLeafNames -contains $LeafName) {
+        throw "Refusing to use a high-risk source root path: $FullPath"
+    }
+}
+
 $env:JAVA_HOME = $JavaHome
 $env:Path = (Join-Path $JavaHome 'bin') + ';' + (Split-Path -Parent $GitExe) + ';' + (Split-Path -Parent $MvnCmd) + ';' + $env:Path
 
@@ -145,6 +167,8 @@ New-Item -ItemType Directory -Force -Path $ReleaseDir | Out-Null
 New-Item -ItemType Directory -Force -Path $DeployTmp | Out-Null
 
 function Sync-Repository {
+    Assert-SafeSourceRoot -PathToCheck $SourceRoot
+
     if (-not (Test-Path (Join-Path $SourceRoot '.git'))) {
         if (Test-Path $SourceRoot) {
             Remove-Item $SourceRoot -Recurse -Force
@@ -161,6 +185,7 @@ function Sync-Repository {
     }
 
     Write-Step "Fetching latest branch state from origin/$Branch"
+    Invoke-External -FilePath $GitExe -Arguments @('remote', 'set-url', 'origin', $RepoUrl) -WorkingDirectory $SourceRoot
     Invoke-External -FilePath $GitExe -Arguments @('fetch', '--prune', '--depth', '1', 'origin', $Branch) -WorkingDirectory $SourceRoot
     Invoke-External -FilePath $GitExe -Arguments @('checkout', '-B', $Branch, "origin/$Branch") -WorkingDirectory $SourceRoot
     Invoke-External -FilePath $GitExe -Arguments @('reset', '--hard', "origin/$Branch") -WorkingDirectory $SourceRoot

doc/ci-auto-deploy.md

@@ -11,7 +11,7 @@
 当前自动部署链路采用服务器拉最新源码并本机编译的方式：
 
 1. 通过 WinRM 连接 Windows 服务器
-2. 在服务器上的源码目录执行 `git fetch/reset/clean`，同步到 `origin/master`
+2. 在服务器上的源码目录执行 `git fetch/reset/clean`，同步到 `origin/$KK_DEPLOY_BRANCH`（默认 `master`）
 3. 使用服务器上的 JDK 21 和 Maven 执行 `mvn clean package -Dmaven.test.skip=true`
 4. 备份线上 jar，替换为新构建产物
 5. 使用现有 `startup.bat` 重启，并做健康检查
@@ -23,11 +23,13 @@
 - `KK_DEPLOY_USERNAME`
 - `KK_DEPLOY_PASSWORD`
 
-下面这些可以通过 workflow env 或 GitHub Variables 覆盖；未配置时会使用默认值：
+以下部署参数当前由 workflow 从 GitHub Secrets 读取；如果未单独配置，则使用脚本默认值：
 
 - `KK_DEPLOY_PORT=5985`
 - `KK_DEPLOY_ROOT=C:\kkFileView-5.0`
 - `KK_DEPLOY_HEALTH_URL=http://127.0.0.1:8012/`
+
+下面这些非敏感参数可以通过 workflow env 或 GitHub Variables 覆盖；未配置时会使用默认值：
 - `KK_DEPLOY_REPO_URL=https://github.com/kekingcn/kkFileView.git`
 - `KK_DEPLOY_BRANCH=master`
 - `KK_DEPLOY_SOURCE_ROOT=C:\kkFileView-source`