feat: Introduce advanced TLS client with browser fingerprinting and new backend modules for API processing, authentication, mail, and ChatGPT registration.

backend/internal/auth/codex_api.go

@@ -296,8 +296,27 @@ func (c *CodexAPIAuth) GetSessionID() string {
 	return c.sessionID
 }
 
-// ObtainAuthorizationCode 获取授权码
+// ObtainAuthorizationCode 获取授权码（全局 3 分钟超时）
 func (c *CodexAPIAuth) ObtainAuthorizationCode() (string, error) {
+	type authResult struct {
+		code string
+		err  error
+	}
+	resultCh := make(chan authResult, 1)
+	go func() {
+		code, err := c.obtainAuthorizationCodeInternal()
+		resultCh <- authResult{code, err}
+	}()
+	select {
+	case r := <-resultCh:
+		return r.code, r.err
+	case <-time.After(3 * time.Minute):
+		return "", fmt.Errorf("授权超时 (3分钟)")
+	}
+}
+
+// obtainAuthorizationCodeInternal ObtainAuthorizationCode 的内部实现
+func (c *CodexAPIAuth) obtainAuthorizationCodeInternal() (string, error) {
 	c.logStep(StepNavigate, "开始 Codex API 授权流程...")
 
 	// 选择使用固定 URL 还是 S2A 生成的 URL