- UI state properties follow the `SetProperty(ref _field, value)` pattern inherited from `BaseViewModel`, with filter setters additionally calling `ApplyFilter()` to re-query the database.
- Commands are exposed as lazy-initialized read-only properties using `??=` with `new RelayCommand(...)` / `new RelayCommandAsync(...)`, guarded by a can-execute lambda over `SelectedItem`.
- Background work uses `Task.Run` followed by `.ContinueWith` or `_dispatcher.Invoke`/`_dispatcher.InvokeAsync` to marshal results back onto the UI thread before touching `ObservableCollection`s.
- Long-running async operations wrap their body in try/catch/finally that sets `Loading = false` and surfaces errors through `MessageBox.Show` with localized `Strings.Error`.
- LiteDB entities are plain POCOs annotated with `[BsonId]` and stored in collections created via `database.GetCollection<T>("name")` with `EnsureIndex(x => x.Id)`.