```

feat: 添加Windows PowerShell重启脚本

添加restart.ps1脚本来管理服务器进程的启动、停止和重启功能，
包括PID文件管理和端口检测。同时创建了logs/server.pid文件来
存储服务器进程ID。
```

logs/server.pid

@@ -0,0 +1 @@
+22924

restart.ps1

@@ -0,0 +1,100 @@
+$ErrorActionPreference = 'Stop'
+
+$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+$LogDir = Join-Path $ScriptDir 'logs'
+$PidFile = Join-Path $LogDir 'server.pid'
+$LogFile = Join-Path $LogDir 'server.log'
+
+New-Item -ItemType Directory -Force -Path $LogDir | Out-Null
+
+function Get-PortFromEnvFile {
+    $envFile = Join-Path $ScriptDir '.env'
+    if (-not (Test-Path $envFile)) {
+        return $null
+    }
+
+    $line = Get-Content $envFile | Where-Object { $_ -match '^PORT=' } | Select-Object -Last 1
+    if (-not $line) {
+        return $null
+    }
+
+    return ($line -replace '^PORT=', '').Trim()
+}
+
+function Get-ProjectServerProcesses {
+    Get-CimInstance Win32_Process | Where-Object {
+        $_.Name -eq 'node.exe' -and
+        $_.CommandLine -like '*src/server.js*' -and
+        $_.CommandLine -like "*$ScriptDir*"
+    }
+}
+
+function Stop-ExistingServer {
+    $processes = @(Get-ProjectServerProcesses)
+
+    if ($processes.Count -eq 0) {
+        Write-Host "No existing server process found for $ScriptDir"
+        return
+    }
+
+    $ids = $processes | ForEach-Object { $_.ProcessId }
+    Write-Host ("Stopping existing server process(es): " + ($ids -join ', '))
+
+    foreach ($process in $processes) {
+        Stop-Process -Id $process.ProcessId -Force -ErrorAction SilentlyContinue
+    }
+
+    Start-Sleep -Seconds 2
+}
+
+function Start-Server {
+    $port = if ($env:PORT) { $env:PORT } else { Get-PortFromEnvFile }
+    if (-not $port) { $port = '5000' }
+
+    Write-Host "Starting server from $ScriptDir on port $port"
+
+    $command = "Set-Location -LiteralPath '$ScriptDir'; node src/server.js *>> '$LogFile'"
+    $process = Start-Process -FilePath 'powershell.exe' `
+        -ArgumentList '-NoProfile', '-ExecutionPolicy', 'Bypass', '-Command', $command `
+        -WindowStyle Hidden `
+        -PassThru
+
+    Set-Content -Path $PidFile -Value $process.Id
+    Write-Host "Started PID: $($process.Id)"
+
+    return $port
+}
+
+function Show-Status {
+    param(
+        [string]$Port
+    )
+
+    Start-Sleep -Seconds 2
+
+    Write-Host ''
+    Write-Host 'Active project server process(es):'
+    $processes = @(Get-ProjectServerProcesses)
+    if ($processes.Count -eq 0) {
+        Write-Host 'None'
+    } else {
+        $processes | Select-Object ProcessId, Name, CommandLine | Format-Table -AutoSize
+    }
+
+    Write-Host ''
+    Write-Host 'Port check:'
+    Get-NetTCPConnection -LocalPort ([int]$Port) -State Listen -ErrorAction SilentlyContinue |
+        Select-Object LocalAddress, LocalPort, OwningProcess | Format-Table -AutoSize
+
+    Write-Host ''
+    Write-Host 'Recent log output:'
+    if (Test-Path $LogFile) {
+        Get-Content $LogFile -Tail 30
+    } else {
+        Write-Host 'No log file yet.'
+    }
+}
+
+Stop-ExistingServer
+$port = Start-Server
+Show-Status -Port $port