feature/onboarding — First-Launch Onboarding

To show a Flutter onboarding flow on first launch, display a PageView with intro slides and persist a 'has seen' boolean flag in local Hive storage. A route guard then reads this flag to determine if the user should see the intro or proceed to main flows.

Cubit manages onboarding page navigation by tracking currentPage, totalPages, and isLastPage states. OnboardingCubit handles transitions between slides and triggers the CompleteOnboardingUseCase to write the seen flag to Hive upon finishing.

Yes, you can use Lottie animations in a Flutter PageView for onboarding slides. Each OnboardingSlideEntity in the PageView supports a Lottie animation alongside its title, description, and background color to create a guided visual introduction.

Yes, you need local Hive storage to persist the onboarding seen flag in Flutter. The CompleteOnboardingUseCase writes the boolean flag to Hive, allowing route guards to read it and prevent the onboarding from showing again on subsequent app launches.

The best way to handle skip and complete flows in Flutter onboarding is providing a visible Skip action on early pages and a Next or 'Bắt đầu' button on the final page. Completing either flow triggers the use case to write the seen flag to Hive.

You need a route guard for Flutter onboarding navigation when deciding whether first-time users should see the intro or go directly to login. The guard reads the persisted Hive flag to route users appropriately, avoiding repeated interruptions.