Add token refresh handling for 401 responses across clients

- Implemented `RefreshTokens` method in client interfaces and Gemini clients.
- Updated handlers to call `RefreshTokens` on 401 responses and retry requests if token refresh succeeds.
- Enhanced error handling and retry logic to accommodate token refresh flow.

Update README to include Qwen login instructions

- Added Qwen OAuth login command instructions in both English and Chinese README files.
- Made minor updates to existing command examples for consistency.

README.md

@@ -431,10 +431,16 @@ Run the following command to login (OpenAI OAuth on port 1455):
 docker run --rm -p 1455:1455 -v /path/to/your/config.yaml:/CLIProxyAPI/config.yaml -v /path/to/your/auth-dir:/root/.cli-proxy-api eceasy/cli-proxy-api:latest /CLIProxyAPI/CLIProxyAPI --codex-login
 ```
 
-Run the following command to login (Claude OAuth on port 54545):
+Run the following command to logi (Claude OAuth on port 54545):
 
 ```bash
-docker run --rm -p 54545:54545 -v /path/to/your/config.yaml:/CLIProxyAPI/config.yaml -v /path/to/your/auth-dir:/root/.cli-proxy-api eceasy/cli-proxy-api:latest /CLIProxyAPI/CLIProxyAPI --claude-login
+docker run -rm -p 54545:54545 -v /path/to/your/config.yaml:/CLIProxyAPI/config.yaml -v /path/to/your/auth-dir:/root/.cli-proxy-api eceasy/cli-proxy-api:latest /CLIProxyAPI/CLIProxyAPI --claude-login
+```
+
+Run the following command to login (Qwen OAuth):
+
+```bash
+docker run -it -rm -v /path/to/your/config.yaml:/CLIProxyAPI/config.yaml -v /path/to/your/auth-dir:/root/.cli-proxy-api eceasy/cli-proxy-api:latest /CLIProxyAPI/CLIProxyAPI --qwen-login
 ```
 
 Run the following command to start the server:

README_CN.md

@@ -433,6 +433,13 @@ docker run --rm -p 1455:1455 -v /path/to/your/config.yaml:/CLIProxyAPI/config.ya
 docker run --rm -p 54545:54545 -v /path/to/your/config.yaml:/CLIProxyAPI/config.yaml -v /path/to/your/auth-dir:/root/.cli-proxy-api eceasy/cli-proxy-api:latest /CLIProxyAPI/CLIProxyAPI --claude-login
 ```
 
+运行以下命令进行登录（Qwen OAuth）：
+
+```bash
+docker run -it -rm -v /path/to/your/config.yaml:/CLIProxyAPI/config.yaml -v /path/to/your/auth-dir:/root/.cli-proxy-api eceasy/cli-proxy-api:latest /CLIProxyAPI/CLIProxyAPI --qwen-login
+```
+
+
 运行以下命令启动服务器：
 
 ```bash

internal/cmd/run.go

@@ -263,6 +263,7 @@ func StartService(cfg *config.Config, configPath string) {
 		for {
 			select {
 			case <-ctxRefresh.Done():
+				log.Debugf("refreshing tokens stopped...")
 				return
 			case <-ticker.C:
 				checkAndRefresh()