feat: Implement S2A OAuth authorization using chromedp and introduce new files for browser automation and team processing.

backend/internal/api/team_process.go

@@ -902,23 +902,53 @@ func processSingleTeam(idx int, req TeamProcessRequest) (result TeamProcessResul
 	return result
 }
 
-// registerWithTimeout 带超时的注册
+// registerWithTimeout 带超时的注册（遇到 403 会换指纹重试）
 func registerWithTimeout(email, password, name, birthdate, proxy string) (*register.ChatGPTReg, error) {
-	reg, err := register.New(proxy)
-	if err != nil {
-		return nil, err
+	const maxInitRetries = 3
+	var reg *register.ChatGPTReg
+	var initErr error
+
+	// 初始化阶段：遇到 403 换指纹重试
+	for attempt := 0; attempt < maxInitRetries; attempt++ {
+		var err error
+		reg, err = register.New(proxy)
+		if err != nil {
+			return nil, err
+		}
+
+		if err := reg.InitSession(); err != nil {
+			initErr = err
+			// 检查是否是 403 错误，换指纹重试
+			if strings.Contains(err.Error(), "403") {
+				continue
+			}
+			return nil, fmt.Errorf("初始化失败: %v", err)
+		}
+
+		if err := reg.GetAuthorizeURL(email); err != nil {
+			// 403 也可能在这里出现
+			if strings.Contains(err.Error(), "403") {
+				initErr = err
+				continue
+			}
+			return nil, fmt.Errorf("获取授权URL失败: %v", err)
+		}
+
+		if err := reg.StartAuthorize(); err != nil {
+			if strings.Contains(err.Error(), "403") {
+				initErr = err
+				continue
+			}
+			return nil, fmt.Errorf("启动授权失败: %v", err)
+		}
+
+		// 初始化成功，跳出重试循环
+		initErr = nil
+		break
 	}
 
-	if err := reg.InitSession(); err != nil {
-		return nil, fmt.Errorf("初始化失败: %v", err)
-	}
-
-	if err := reg.GetAuthorizeURL(email); err != nil {
-		return nil, fmt.Errorf("获取授权URL失败: %v", err)
-	}
-
-	if err := reg.StartAuthorize(); err != nil {
-		return nil, fmt.Errorf("启动授权失败: %v", err)
+	if initErr != nil {
+		return nil, fmt.Errorf("初始化失败(重试%d次): %v", maxInitRetries, initErr)
 	}
 
 	if err := reg.Register(email, password); err != nil {