对接阿里云短信OK

backend/internal/modules/auth/handler.go

@@ -84,6 +84,8 @@ func writeAuthError(c *gin.Context, err error) {
 		response.BadRequest(c, "手机号格式不正确")
 	case errors.Is(err, ErrCodeRateLimited):
 		response.Error(c, http.StatusTooManyRequests, "rate_limited", "验证码发送过于频繁")
+	case errors.Is(err, ErrSMSSendFailed):
+		response.Error(c, http.StatusBadGateway, "sms_send_failed", "验证码发送失败，请稍后重试")
 	case errors.Is(err, ErrCodeInvalid):
 		response.BadRequest(c, "验证码错误或已过期")
 	case errors.Is(err, ErrUserDisabled):