Claude Code 安装失败
Failed to fetch version from https://downloads.claude.ai/claude-code-releases/latest after 3 attempt(s): ECONNREFUSED
Windows用终端PowerShell安装，非cmd
（cmd也能装，不是这个命令）
开VPN
在浏览器用 https://claude.ai/ 测试一下，有页面证明网络没问题
PowerShell输入：
irm https://claude.ai/install.ps1 | iex输出
报错信息：Failed to fetch version from https://downloads.claude.ai/claude-code-releases/latest after 3 attempt(s): ECONNREFUSED
到VPN里面查端口号
PowerShell输入：
$env:HTTP_PROXY="http://127.0.0.1:7897";$env:HTTPS_PROXY="http://127.0.0.1:7897"我的端口号是7897，不是就改这个数字，别的不动
PowerShell输入：
irm https://claude.ai/install.ps1 | iex