Merge branch 'Wei-Shaw:main' into main

backend/internal/service/openai_gateway_service.go

@@ -240,7 +240,7 @@ func (s *OpenAIGatewayService) GetAccessToken(ctx context.Context, account *Acco
 
 func (s *OpenAIGatewayService) shouldFailoverUpstreamError(statusCode int) bool {
 	switch statusCode {
-	case 401, 403, 429, 529:
+	case 401, 402, 403, 429, 529:
 		return true
 	default:
 		return statusCode >= 500
@@ -454,6 +454,10 @@ func (s *OpenAIGatewayService) handleErrorResponse(ctx context.Context, resp *ht
 		statusCode = http.StatusBadGateway
 		errType = "upstream_error"
 		errMsg = "Upstream authentication failed, please contact administrator"
+	case 402:
+		statusCode = http.StatusBadGateway
+		errType = "upstream_error"
+		errMsg = "Upstream payment required: insufficient balance or billing issue"
 	case 403:
 		statusCode = http.StatusBadGateway
 		errType = "upstream_error"

backend/internal/service/ratelimit_service.go

@@ -39,6 +39,10 @@ func (s *RateLimitService) HandleUpstreamError(ctx context.Context, account *Acc
 		// 认证失败：停止调度，记录错误
 		s.handleAuthError(ctx, account, "Authentication failed (401): invalid or expired credentials")
 		return true
+	case 402:
+		// 支付要求：余额不足或计费问题，停止调度
+		s.handleAuthError(ctx, account, "Payment required (402): insufficient balance or billing issue")
+		return true
 	case 403:
 		// 禁止访问：停止调度，记录错误
 		s.handleAuthError(ctx, account, "Access forbidden (403): account may be suspended or lack permissions")