```PowerShell
#----------------------------------------------------------------------
# 控制台输出编码设置为 UTF-8
#----------------------------------------------------------------------
[Console]::InputEncoding = [System.Text.Encoding]::UTF8
[Console]::OutputEncoding = [System.Text.Encoding]::UTF8

#----------------------------------------------------------------------
# PSReadLine 配置
#----------------------------------------------------------------------
if ($Host.Name -eq 'ConsoleHost' -and $Host.UI.SupportsVirtualTerminal) {
    try {
        # --- 预测与补全 ---
        Set-PSReadLineOption -PredictionSource HistoryAndPlugin
        Set-PSReadLineOption -PredictionViewStyle ListView
        Set-PSReadLineKeyHandler -Key Tab -Function MenuComplete
        # --- 历史记录优化 ---
        Set-PSReadLineOption -HistoryNoDuplicates
        Set-PSReadLineOption -MaximumHistoryCount 10000
    }
    catch {
        Write-Verbose "PSReadLine 配置未生效: $($_.Exception.Message)"
    }
}

#----------------------------------------------------------------------
# 自定义快捷命令
#----------------------------------------------------------------------
function ep { code $PROFILE }
function vim { nvim $args }

#----------------------------------------------------------------------
# 查找并可选择性删除当前目录及子目录下的所有空文件夹。
# - 会自动忽略 .git 目录。
# - 解决了嵌套空目录的删除顺序问题。
# - 支持 -WhatIf 和 -Confirm 安全参数。
# - 遵循 PowerShell 最佳实践。
#----------------------------------------------------------------------
function Get-EmptyDirectory {
    [CmdletBinding(SupportsShouldProcess = $true)]
    param (
        [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)]
        [string]$Path = ".",
        [Switch]
        [Alias('d')]
        $Delete
    )

    # 要忽略的目录名称列表
    $ignoreDirs = @(".git", ".idea", ".vscode", "node_modules", "dist")

    # 1. 获取所有目录，递归排除 ignoreDirs
    $emptyDirs = Get-ChildItem -Path $Path -Recurse -Directory -ErrorAction SilentlyContinue |
    Where-Object {
        # 当前目录是否属于忽略名单
        $name = $_.Name.ToLower()
        if ($ignoreDirs -contains $name) { return $false }

        $lowerPath = $_.FullName.ToLower()
        if ($lowerPath -match 'node_modules|dist') { return $false }

        # 是否为空目录
        -not $_.GetFileSystemInfos()
    }

    # 2. 按路径长度降序排列，保证先删除子目录
    $sortedEmptyDirs = $emptyDirs | Sort-Object { $_.FullName.Length } -Descending

    foreach ($dir in $sortedEmptyDirs) {
        # 输出管道对象
        Write-Output $dir

        if ($Delete) {
            if ($PSCmdlet.ShouldProcess($dir.FullName, "Delete Empty Directory")) {
                Remove-Item -LiteralPath $dir.FullName -Force
                Write-Host "Deleted empty directory: $($dir.FullName)" -ForegroundColor Green
            }
        }
    }
}

Set-Alias -Name fempty -Value Get-EmptyDirectory

#----------------------------------------------------------------------
#  函数: Get-GitCodeLines
#----------------------------------------------------------------------
#
#  用法 1（默认统计当前 Git 仓库，当前用户，最近 30 天）:
#    Get-GitCodeLines
#
#  用法 2（指定具体日期范围）:
#    Get-GitCodeLines -Author "zhangsan" -Since "2025-01-01" -Until "2025-06-30"
#
function Get-GitCodeLines {
    param (
        [string]$Author = "$(git config user.name)",
        [string]$Since,     # yyyy-MM-dd
        [string]$Until      # yyyy-MM-dd
    )

    # 检查是否在 Git 仓库中
    if (-not (Test-Path ".git")) {
        Write-Host "❌ 当前目录不是 Git 仓库。" -ForegroundColor Red
        return
    }

    # 若未提供日期，则使用最近 30 天
    if (-not $Since) {
        $Since = (Get-Date).AddDays(-30).ToString("yyyy-MM-dd")
    }
    if (-not $Until) {
        $Until = (Get-Date).ToString("yyyy-MM-dd")
    }

    Write-Host "📊 正在统计 $Author 从 $Since 到 $Until 的代码变动..." -ForegroundColor Cyan

    $log = git log `
        --since=$Since `
        --until=$Until `
        --author=$Author `
        --pretty=tformat: `
        --numstat

    if ($LASTEXITCODE -ne 0) {
        Write-Host "❌ git log 执行失败，请检查参数。" -ForegroundColor Red
        return
    }

    if (-not $log) {
        Write-Host "⚠️ 该时间段内无提交记录。" -ForegroundColor Yellow
        return
    }

    $added = 0
    $deleted = 0

    foreach ($line in $log) {
        if ($line -match "^\d+\s+\d+") {
            $cols = $line -split "\s+", 3
            $added += [int]$cols[0]
            $deleted += [int]$cols[1]
        }
    }

    $net = $added - $deleted
    $total = $added + $deleted

    Write-Host "✅ 作者: $Author" -ForegroundColor Green
    Write-Host "📆 时间范围: $Since ~ $Until"
    Write-Host "🟢 增加: $added 行"
    Write-Host "🔴 删除: $deleted 行"
    Write-Host "🔵 净增: $net 行" -ForegroundColor $(if ($net -gt 0) { "Green" } elseif ($net -lt 0) { "Red" } else { "Gray" })
    Write-Host "📈 总变动: $total 行"
}

Set-Alias singbox "D:\MyCode\netbox\sing-box\singbox.ps1"

```