Are you familiar with SOLID principles, clean architecture, Feature-Sliced Design?

The SOLID principles are a set of five fundamental principles of object-oriented programming aimed at creating flexible, extendable, and maintainable systems:

• S (Single Responsibility Principle) — each class should have one responsibility.
• O (Open/Closed Principle) — software entities should be open for extension but closed for modification.
• L (Liskov Substitution Principle) — objects of subclasses should be interchangeable with objects of the base class.
• I (Interface Segregation Principle) — it's better to have several specialized interfaces than one universal interface.
• D (Dependency Inversion Principle) — upper modules should not depend on lower modules; both should depend on abstractions.

Clean architecture is an approach to software design where business logic is separated from implementation details (UI, databases, external services). The main idea is that dependencies point inward, from outer layers to inner layers, which facilitates testing and maintenance.

Feature-Sliced Design is a methodology for organizing frontend code based on dividing the application into functional slices (features). Each slice contains everything necessary for its functionality: UI, logic, state, etc. This helps scale the project and improves code readability.

Example structure based on Feature-Sliced Design:

src/
  app/
  entities/
  features/
  shared/
  widgets/

Where features are separate functional blocks, entities are business entities, widgets are UI components, and shared contains common utilities and styles.