fix: complete upstream request id handling

backend/internal/service/admin_account.go

@@ -474,6 +474,9 @@ func (s *adminServiceImpl) CreateAccount(ctx context.Context, input *CreateAccou
 	if err != nil {
 		return nil, err
 	}
+	if err := ValidateUpstreamRequestIDHeaderExtra(accountExtra); err != nil {
+		return nil, err
+	}
 
 	// 绑定分组
 	groupIDs := input.GroupIDs
@@ -571,6 +574,9 @@ func (s *adminServiceImpl) UpdateAccount(ctx context.Context, id int64, input *U
 		if err != nil {
 			return nil, err
 		}
+		if err := ValidateUpstreamRequestIDHeaderExtra(normalizedExtra); err != nil {
+			return nil, err
+		}
 	}
 	previousProbeIdentity := upstreamBillingProbeIdentity(account)
 	previousOllamaUsageIdentity := ollamaCloudUsageIdentity(account)

backend/internal/service/antigravity_gateway_upstream.go

@@ -150,6 +150,7 @@ func (s *AntigravityGatewayService) ForwardUpstream(ctx context.Context, c *gin.
 		Duration:                      duration,
 		FirstTokenMs:                  firstTokenMs,
 		ClientDisconnect:              clientDisconnect,
+		UpstreamHeaders:               resp.Header,
 		Usage: ClaudeUsage{
 			InputTokens:              usage.InputTokens,
 			OutputTokens:             usage.OutputTokens,

backend/internal/service/upstream_request_id.go

@@ -3,6 +3,7 @@ package service
 import (
 	"net/http"
 	"strings"
+	"unicode/utf8"
 
 	infraerrors "github.com/Wei-Shaw/sub2api/internal/pkg/errors"
 	"golang.org/x/net/http/httpguts"
@@ -51,6 +52,12 @@ func usageUpstreamRequestIDPtr(account *Account, h http.Header, wsMode bool) *st
 	}
 	if len(id) > maxUsageUpstreamRequestIDLen {
 		id = id[:maxUsageUpstreamRequestIDLen]
+		for len(id) > 0 && !utf8.ValidString(id) {
+			id = id[:len(id)-1]
+		}
+	}
+	if id == "" {
+		return nil
 	}
 	return &id
 }

frontend/src/components/account/CreateAccountModal.vue

@@ -5120,6 +5120,7 @@ const resetForm = () => {
   adaptiveBaseUrls.value = { chat_completions: '', anthropic: '', responses: '' }
   apiKeyBaseUrl.value = 'https://api.anthropic.com'
   apiKeyValue.value = ''
+  upstreamRequestIdHeader.value = ''
   upstreamBillingAutoProbeEnabled.value = true
   editQuotaLimit.value = null
   editQuotaDailyLimit.value = null