feat(plugin): support authenticated proxy

[qiye45]

Added a new plugin to support authenticated proxy.

The auth-proxy-adapter plugin will start a local unauthenticated proxy server (default socks5://127.0.0.1:4545) that forwards requests to an authenticated proxy server configured in the application settings, supporting proxy in the format socks5://username:password@your_server_ip:port.

When enabled, the plugin intercepts app.commandLine.appendSwitch('proxy-server', proxyToUse) and changes the application's proxy to use the local proxy server.

Fixes #743

[qiye45]

Images and logs:

[YTMusic] Plugin "auth-proxy-adapter::menu" loaded
[YTMusic] ===========================================
[YTMusic] [Auth-Proxy-Adapter] SOCKS proxy enabled at 127.0.0.1:4545
[YTMusic] [Auth-Proxy-Adapter] Using upstream proxy: socks5://test:test@172.16.229.142:7891
[YTMusic] ===========================================
[YTMusic] [SOCKS5] Request to connect to music.youtube.com:443
[YTMusic] [SOCKS5] Request to connect to googleads.g.doubleclick.net:443
[YTMusic] [SOCKS5] Request to connect to www.google.com:443
[YTMusic] [SOCKS5] Request to connect to static.doubleclick.net:443

[Copilot]

Pull Request Overview

This PR introduces the auth-proxy-adapter plugin to support authenticated proxies by starting a local unauthenticated proxy server that forwards requests to a configured authenticated proxy.

• New menu items allow configuration of hostname and port for the proxy adapter.
• The backend is extended to intercept and forward SOCKS proxy connections via an upstream proxy.
• The application startup is updated to conditionally use the auth-proxy-adapter proxy settings.

Reviewed Changes

Copilot reviewed 7 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/plugins/auth-proxy-adapter/menu.ts	Adds menu items for configuring hostname and port with a minor validation discrepancy.
src/plugins/auth-proxy-adapter/index.ts	Initializes the plugin with its configuration and backend integration.
src/plugins/auth-proxy-adapter/config.ts	Defines the interface and default configuration for the auth-proxy-adapter plugin.
src/plugins/auth-proxy-adapter/backend/types.ts	Provides type definitions for backend handling related to SOCKS connections.
src/plugins/auth-proxy-adapter/backend/main.ts	Implements the core backend logic for handling SOCKS4/5 requests through the upstream proxy.
src/plugins/auth-proxy-adapter/backend/index.ts	Re-exports backend definitions.
src/index.ts	Updates application startup logic to use the local proxy if the auth-proxy-adapter is enabled.

Files not reviewed (2)

• src/i18n/resources/en.json: Language not supported
• src/i18n/resources/zh-CN.json: Language not supported

[qiye45]

Maybe handleSocks4 can be removed because the SOCKS4 protocol does not have proxy authentication.

[qiye45]

Maybe handleSocks4 can be removed because the SOCKS4 protocol does not have proxy authentication.

I removed handleSocks4 and the application imported the ‘socks’ package because it needed to turn on the socket local server to forward requests