fix(traffic): commit a traffic tick even when a best-effort maintenance helper fails

addTrafficLocked stages the inbound and client deltas, then runs three helpers
(auto-renew, disable depleted clients, disable depleted inbounds) that are meant
to log and continue. All three reused the function-scope err that the deferred
commit/rollback inspects, so the last helper's error decided the whole tick: a
failure in disableInvalidInbounds rolled back the already-staged traffic while
AddTraffic reported success, and because xray had already advanced its counter
baseline that traffic was lost for good. Give each best-effort helper its own
error variable so only a genuine staging failure rolls the tick back.

internal/web/service/inbound_traffic.go

@@ -51,25 +51,25 @@ func (s *InboundService) addTrafficLocked(inboundTraffics []*xray.Traffic, clien
 		return false, false, err
 	}
 
-	needRestart0, count, err := s.autoRenewClients(tx)
-	if err != nil {
-		logger.Warning("Error in renew clients:", err)
+	needRestart0, count, renewErr := s.autoRenewClients(tx)
+	if renewErr != nil {
+		logger.Warning("Error in renew clients:", renewErr)
 	} else if count > 0 {
 		logger.Debugf("%v clients renewed", count)
 	}
 
 	disabledClientsCount := int64(0)
-	needRestart1, count, err := s.disableInvalidClients(tx)
-	if err != nil {
-		logger.Warning("Error in disabling invalid clients:", err)
+	needRestart1, count, disableClientsErr := s.disableInvalidClients(tx)
+	if disableClientsErr != nil {
+		logger.Warning("Error in disabling invalid clients:", disableClientsErr)
 	} else if count > 0 {
 		logger.Debugf("%v clients disabled", count)
 		disabledClientsCount = count
 	}
 
-	needRestart2, count, err := s.disableInvalidInbounds(tx)
-	if err != nil {
-		logger.Warning("Error in disabling invalid inbounds:", err)
+	needRestart2, count, disableInboundsErr := s.disableInvalidInbounds(tx)
+	if disableInboundsErr != nil {
+		logger.Warning("Error in disabling invalid inbounds:", disableInboundsErr)
 	} else if count > 0 {
 		logger.Debugf("%v inbounds disabled", count)
 	}

internal/web/service/traffic_commit_test.go

@@ -0,0 +1,54 @@
+package service
+
+import (
+	"errors"
+	"strings"
+	"testing"
+
+	"gorm.io/gorm"
+
+	"github.com/mhsanaei/3x-ui/v3/internal/database/model"
+	"github.com/mhsanaei/3x-ui/v3/internal/xray"
+)
+
+// The traffic tick stages inbound and client deltas, then runs three best-effort
+// maintenance helpers (renew, disable-depleted-clients, disable-depleted-inbounds)
+// that are meant to log and continue. A failure in one of them must not roll back
+// the already-staged traffic — xray has already advanced its baseline, so a
+// rolled-back tick loses that traffic permanently.
+func TestAddTrafficCommitsDespiteDisableHelperError(t *testing.T) {
+	db := initTrafficTestDB(t)
+	svc := &InboundService{}
+
+	normal := &model.Inbound{UserId: 1, Tag: "in-normal", Enable: true, Port: 43001, Protocol: model.VLESS, Settings: `{"clients":[]}`}
+	if err := db.Create(normal).Error; err != nil {
+		t.Fatalf("seed normal inbound: %v", err)
+	}
+	expired := &model.Inbound{UserId: 1, Tag: "in-expired", Enable: true, Port: 43002, Protocol: model.VLESS, ExpiryTime: 1, Settings: `{"clients":[]}`}
+	if err := db.Create(expired).Error; err != nil {
+		t.Fatalf("seed expired inbound: %v", err)
+	}
+
+	const cbName = "b2-03:fail-disable"
+	if err := db.Callback().Update().After("gorm:update").Register(cbName, func(tx *gorm.DB) {
+		if tx.Statement != nil && tx.Statement.Table == "inbounds" &&
+			strings.Contains(tx.Statement.SQL.String(), "expiry_time") {
+			tx.AddError(errors.New("injected disableInvalidInbounds failure"))
+		}
+	}); err != nil {
+		t.Fatalf("register callback: %v", err)
+	}
+	t.Cleanup(func() { _ = db.Callback().Update().Remove(cbName) })
+
+	if _, _, err := svc.AddTraffic([]*xray.Traffic{{IsInbound: true, Tag: "in-normal", Up: 500, Down: 700}}, nil); err != nil {
+		t.Fatalf("AddTraffic: %v", err)
+	}
+
+	var reloaded model.Inbound
+	if err := db.Where("tag = ?", "in-normal").First(&reloaded).Error; err != nil {
+		t.Fatalf("reload normal inbound: %v", err)
+	}
+	if reloaded.Up != 500 || reloaded.Down != 700 {
+		t.Fatalf("traffic tick was rolled back by a best-effort disable-helper error: up=%d down=%d, want 500/700", reloaded.Up, reloaded.Down)
+	}
+}