Current topic: "Adding Test Factory"
Topic summary: I am introducing a `testInstance` companion object method to `ViewModelDependencies`. This factory method provides a convenient way to create a mocked `ViewModelDependencies` instance with sensible defaults, significantly reducing the boilerplate required in UI and ViewModel tests. By centralizing the creation of test dependencies, I'm making our tests cleaner, more maintainable, and less prone to breaking when new dependencies are added to the main class.

Strategic Intent: Adding a `testInstance` factory to `ViewModelDependencies` for easier testing.