chore: remove Qwen support from SDK and internal components

- Deleted `QwenAuthenticator`, internal `qwen_auth`, and `qwen_executor` implementations.
- Removed all Qwen-related OAuth flows, token handling, and execution logic.
- Cleaned up dependencies and references to Qwen across the codebase.

README.md

@@ -50,19 +50,17 @@ Get 10% OFF GLM CODING PLAN：https://z.ai/subscribe?ic=8JVLJQFSKB
 - OpenAI/Gemini/Claude compatible API endpoints for CLI models
 - OpenAI Codex support (GPT models) via OAuth login
 - Claude Code support via OAuth login
-- Qwen Code support via OAuth login
 - iFlow support via OAuth login
 - Amp CLI and IDE extensions support with provider routing
 - Streaming and non-streaming responses
 - Function calling/tools support
 - Multimodal input support (text and images)
-- Multiple accounts with round-robin load balancing (Gemini, OpenAI, Claude, Qwen and iFlow)
-- Simple CLI authentication flows (Gemini, OpenAI, Claude, Qwen and iFlow)
+- Multiple accounts with round-robin load balancing (Gemini, OpenAI, Claude and iFlow)
+- Simple CLI authentication flows (Gemini, OpenAI, Claude and iFlow)
 - Generative Language API Key support
 - AI Studio Build multi-account load balancing
 - Gemini CLI multi-account load balancing
 - Claude Code multi-account load balancing
-- Qwen Code multi-account load balancing
 - iFlow multi-account load balancing
 - OpenAI Codex multi-account load balancing
 - OpenAI-compatible upstream providers via config (e.g., OpenRouter)
@@ -132,11 +130,11 @@ CLI wrapper for instant switching between multiple Claude accounts and alternati
 
 ### [Quotio](https://github.com/nguyenphutrong/quotio)
 
-Native macOS menu bar app that unifies Claude, Gemini, OpenAI, Qwen, and Antigravity subscriptions with real-time quota tracking and smart auto-failover for AI coding tools like Claude Code, OpenCode, and Droid - no API keys needed.
+Native macOS menu bar app that unifies Claude, Gemini, OpenAI, and Antigravity subscriptions with real-time quota tracking and smart auto-failover for AI coding tools like Claude Code, OpenCode, and Droid - no API keys needed.
 
 ### [CodMate](https://github.com/loocor/CodMate)
 
-Native macOS SwiftUI app for managing CLI AI sessions (Codex, Claude Code, Gemini CLI) with unified provider management, Git review, project organization, global search, and terminal integration. Integrates CLIProxyAPI to provide OAuth authentication for Codex, Claude, Gemini, Antigravity, and Qwen Code, with built-in and third-party provider rerouting through a single proxy endpoint - no API keys needed for OAuth providers.
+Native macOS SwiftUI app for managing CLI AI sessions (Codex, Claude Code, Gemini CLI) with unified provider management, Git review, project organization, global search, and terminal integration. Integrates CLIProxyAPI to provide OAuth authentication for Codex, Claude, Gemini, and Antigravity, with built-in and third-party provider rerouting through a single proxy endpoint - no API keys needed for OAuth providers.
 
 ### [ProxyPilot](https://github.com/Finesssee/ProxyPilot)
 
@@ -160,7 +158,7 @@ A Windows tray application implemented using PowerShell scripts, without relying
 
 ### [霖君](https://github.com/wangdabaoqq/LinJun)
 
-霖君 is a cross-platform desktop application for managing AI programming assistants, supporting macOS, Windows, and Linux systems. Unified management of Claude Code, Gemini CLI, OpenAI Codex, Qwen Code, and other AI coding tools, with local proxy for multi-account quota tracking and one-click configuration.
+霖君 is a cross-platform desktop application for managing AI programming assistants, supporting macOS, Windows, and Linux systems. Unified management of Claude Code, Gemini CLI, OpenAI Codex, and other AI coding tools, with local proxy for multi-account quota tracking and one-click configuration.
 
 ### [CLIProxyAPI Dashboard](https://github.com/itsmylife44/cliproxyapi-dashboard)
 
@@ -179,7 +177,7 @@ helping users to immersively use AI assistants across applications on controlled
 
 ### [ProxyPal](https://github.com/buddingnewinsights/proxypal)
 
-Cross-platform desktop app (macOS, Windows, Linux) wrapping CLIProxyAPI with a native GUI. Connects Claude, ChatGPT, Gemini, GitHub Copilot, Qwen, iFlow, and custom OpenAI-compatible endpoints with usage analytics, request monitoring, and auto-configuration for popular coding tools - no API keys needed.
+Cross-platform desktop app (macOS, Windows, Linux) wrapping CLIProxyAPI with a native GUI. Connects Claude, ChatGPT, Gemini, GitHub Copilot, iFlow, and custom OpenAI-compatible endpoints with usage analytics, request monitoring, and auto-configuration for popular coding tools - no API keys needed.
 
 ### [CLIProxyAPI Quota Inspector](https://github.com/AllenReder/CLIProxyAPI-Quota-Inspector)