fix: nullable server id in activity log and fix preset logging

local/controller/config_preset.go

@@ -117,7 +117,13 @@ func (c *ConfigPresetController) CreatePreset(ctx *fiber.Ctx) error {
 		return c.errorHandler.HandleParsingError(ctx, err)
 	}
 
-	preset, err := c.service.CreatePreset(ctx.UserContext(), &req)
+	actorID, _ := ctx.Locals("userID").(string)
+	actorUsername, _ := ctx.Locals("actorUsername").(string)
+	if actorUsername == "" {
+		actorUsername = "system"
+	}
+
+	preset, err := c.service.CreatePreset(ctx.UserContext(), &req, actorID, actorUsername)
 	if err != nil {
 		return c.errorHandler.HandleServiceError(ctx, err)
 	}

local/model/activity_log.go

@@ -21,7 +21,7 @@ const (
 
 type ActivityLog struct {
 	ID        uuid.UUID  `json:"id"        gorm:"type:uuid;primary_key;"`
-	ServerID  uuid.UUID  `json:"serverId"  gorm:"not null;type:uuid;index"`
+	ServerID  *uuid.UUID `json:"serverId"  gorm:"type:uuid;index"`
 	Server    *Server    `json:"server,omitempty" gorm:"foreignKey:ServerID"`
 	UserID    string     `json:"userId"    gorm:"not null"`
 	Username  string     `json:"username"  gorm:"not null"`

local/service/config.go

@@ -160,7 +160,7 @@ func (as *ConfigService) UpdateAllConfigs(ctx *fiber.Ctx, req *model.Configurati
 			if details := BuildConfigDetails(entry.fileName, oldDataUTF8, newData); details != "" {
 				go func(details string) {
 					_ = as.activityLog.Log(context.Background(), &model.ActivityLog{
-						ServerID: serverUUID,
+						ServerID: &serverUUID,
 						UserID:   actorID,
 						Username: actorUsername,
 						Action:   model.ActionConfigUpdate,
@@ -285,7 +285,7 @@ func (as *ConfigService) updateConfigInternal(ctx context.Context, serverID stri
 		if details := BuildConfigDetails(configFile, oldDataUTF8, newData); details != "" {
 			go func() {
 				_ = as.activityLog.Log(context.Background(), &model.ActivityLog{
-					ServerID: serverUUID,
+					ServerID: &serverUUID,
 					UserID:   actorID,
 					Username: actorUsername,
 					Action:   model.ActionConfigUpdate,

local/service/config_preset.go

@@ -12,9 +12,9 @@ import (
 )
 
 const (
-	presetMaxNameLen        = 100
+	presetMaxNameLen      = 100
-	presetMaxDescLen        = 500
+	presetMaxDescLen      = 500
-	presetMaxSectionBytes   = 64 * 1024 // 64 KB per config section
+	presetMaxSectionBytes = 64 * 1024 // 64 KB per config section
 )
 
 type ConfigPresetService struct {
@@ -46,7 +46,7 @@ func (s *ConfigPresetService) GetPreset(ctx context.Context, id uuid.UUID) (*mod
 	return preset, nil
 }
 
-func (s *ConfigPresetService) CreatePreset(ctx context.Context, req *model.ConfigPresetCreateRequest) (*model.ConfigPreset, error) {
+func (s *ConfigPresetService) CreatePreset(ctx context.Context, req *model.ConfigPresetCreateRequest, actorID, actorUsername string) (*model.ConfigPreset, error) {
 	if req.Name == "" {
 		return nil, fmt.Errorf("preset name is required")
 	}
@@ -70,7 +70,18 @@ func (s *ConfigPresetService) CreatePreset(ctx context.Context, req *model.Confi
 		return nil, err
 	}
 
-	logging.Info("Preset created: id=%s name=%q", preset.ID, preset.Name)
+	details := fmt.Sprintf(`{"preset_id":%q,"preset_name":%q}`, preset.ID, preset.Name)
+	go func() {
+		if logErr := s.activityLog.Log(context.Background(), &model.ActivityLog{
+			UserID:   actorID,
+			Username: actorUsername,
+			Action:   model.ActionPresetCreate,
+			Details:  details,
+		}); logErr != nil {
+			logging.Error("Failed to log preset create: %v", logErr)
+		}
+	}()
+
 	return preset, nil
 }
 
@@ -154,7 +165,7 @@ func (s *ConfigPresetService) ApplyPreset(ctx context.Context, serverID string,
 	details := fmt.Sprintf(`{"preset_id":%q,"preset_name":%q,"sections_applied":%d}`, presetID, preset.Name, len(results))
 	go func() {
 		if logErr := s.activityLog.Log(context.Background(), &model.ActivityLog{
-			ServerID: serverUUID,
+			ServerID: &serverUUID,
 			UserID:   actorID,
 			Username: actorUsername,
 			Action:   model.ActionPresetApply,

local/service/leaderboard.go

@@ -45,7 +45,7 @@ func (s *LeaderboardService) Update(ctx context.Context, serverID uuid.UUID, lb
 	details := fmt.Sprintf(`{"driver_count":%d,"race_count":%d}`, driverCount, raceCount)
 	go func() {
 		if logErr := s.activityLog.Log(context.Background(), &model.ActivityLog{
-			ServerID: serverID,
+			ServerID: &serverID,
 			UserID:   actorID,
 			Username: actorUsername,
 			Action:   model.ActionLeaderboardUpdate,

local/service/service_control.go

@@ -110,7 +110,7 @@ func (as *ServiceControlService) ServiceControlStartServer(ctx *fiber.Ctx) (stri
 		actorID, actorUsername := extractActor(ctx)
 		go func() {
 			_ = as.activityLog.Log(context.Background(), &model.ActivityLog{
-				ServerID: server.ID,
+				ServerID: &server.ID,
 				UserID:   actorID,
 				Username: actorUsername,
 				Action:   model.ActionServerStart,
@@ -147,7 +147,7 @@ func (as *ServiceControlService) ServiceControlStopServer(ctx *fiber.Ctx) (strin
 		actorID, actorUsername := extractActor(ctx)
 		go func() {
 			_ = as.activityLog.Log(context.Background(), &model.ActivityLog{
-				ServerID: server.ID,
+				ServerID: &server.ID,
 				UserID:   actorID,
 				Username: actorUsername,
 				Action:   model.ActionServerStop,
@@ -184,7 +184,7 @@ func (as *ServiceControlService) ServiceControlRestartServer(ctx *fiber.Ctx) (st
 		actorID, actorUsername := extractActor(ctx)
 		go func() {
 			_ = as.activityLog.Log(context.Background(), &model.ActivityLog{
-				ServerID: server.ID,
+				ServerID: &server.ID,
 				UserID:   actorID,
 				Username: actorUsername,
 				Action:   model.ActionServerRestart,