public async Task AddCollection(string name, bool locked = false)
{
var count = await Collections.CountAsync();
var maxIndex = count > 0 ? await Collections.MaxAsync(k => k.Index) : -1;
var collection = new Collection
{
Id = Guid.NewGuid(),
Name = name,
IsDefault = locked,
Index = maxIndex + 1
};
Collections.Add(collection);
await SaveChangesAsync();
}
