feat: add HTTP/HTTPS/SOCKS5 proxy supportFeat/proxy support 添加HTTP/HTTPS/SOCKS5代理支持

[kiangz]

Summary

Add comprehensive proxy support for all network requests (OpenAI API, telemetry, web search).

Changes

• New src/common/proxy.ts: Proxy resolution module with support for:

  • HTTPS_PROXY, HTTP_PROXY, SOCKS_PROXY, SOCKS5_PROXY environment variables
  • NO_PROXY bypass with wildcard (*), exact match, and subdomain wildcard (.example.com)
  • DEEPCODE_ prefixed environment variables
  • Configuration via ~/.deepcode/settings.json env field
  • Priority: user settings < project settings < system env vars
  • Dispatcher caching to avoid re-creating ProxyAgent on every request

• src/common/openai-client.ts: Integrate ProxyAgent into OpenAI client

• src/common/telemetry.ts: Route telemetry through proxyFetch

• src/tools/web-search-handler.ts: Route web search through proxyFetch

• docs/configuration.md / docs/configuration_en.md: Add proxy configuration docs (zh + en)

• src/tests/proxy.test.ts: 28 unit tests covering all proxy scenarios

Compatibility

• PowerShell: $env:HTTPS_PROXY = "http://..."
• Bash: export HTTPS_PROXY=http://...
• Settings: {"env": {"HTTPS_PROXY": "http://..."}}

摘要

为所有网络请求添加全面的代理支持（OpenAI API、遥测、网络搜索）。

更改

• 新增src/common/proxy.ts：代理解析模块，支持：
  • HTTPS_PROXY 、HTTP_PROXY 、SOCKS_PROXY和SOCKS5_PROXY环境变量
  • “NO_PROXY”绕过通配符（“*”）、精确匹配和子域通配符（“.example.com”）
  • “DEEPCODE_”前缀环境变量
  • 通过“~/.depcode/settings.json” “env”字段进行配置
  • 优先级：用户设置<项目设置<系统环境变量
  • 调度程序缓存，以避免在每次请求时重新创建“ProxyAgent”
• src/common/openai-client.ts：将ProxyAgent 集成到openai客户端中
• src/common/ttelemetry.ts：通过proxyFetch路由遥测
• src/tools/web-search-handler.ts：通过proxyFetch路由web搜索
• docs/configuration.md/docs/configuration _en.md：添加代理配置文档（中文+英文）
• src/tests/proxy.test.ts:28个单元测试，涵盖所有代理场景

兼容性

• PowerShell: $env:HTTPS_PROXY = "http://..."
• Bash: export HTTPS_PROXY=http://...
• Settings: {"env": {"HTTPS_PROXY": "http://..."}}