fix: Create a new XP entry for new users

db/level.go

@@ -27,10 +27,17 @@ func GetXP(userID string) int64 {
 }
 
 func IncrementXP(userID string, value int64, newTime time.Time) {
-	db.Model(&PlayerLevel{}).
+	result := db.Model(&PlayerLevel{}).
 		Where(&PlayerLevel{UserID: userID}).
 		UpdateColumn("xp", gorm.Expr("xp + ?", value)).
 		UpdateColumn("last_active", newTime)
+	if result.RowsAffected == 0 {
+		db.Create(&PlayerLevel{
+			UserID:     userID,
+			XP:         value,
+			LastActive: newTime,
+		})
+	}
 }
 
 func GetLastActive(userID string) time.Time {