## ADDED Requirements

### Requirement: Shadcn/ui Integration
The system SHALL be integrated with the `shadcn/ui` component library.

#### Scenario: Component Replacement
- **WHEN** the application is rendered
- **THEN** the `Dropdown` and `FilterBox` components SHALL be replaced with their `shadcn/ui` equivalents.
- **THEN** the visual appearance of the components SHALL be consistent with the `shadcn/ui` design system.

### Requirement: Consistent UI
All new frontend components SHALL be built using `shadcn/ui`.

#### Scenario: New Component Development
- **WHEN** a new component is developed
- **THEN** it SHALL be built using components from the `shadcn/ui` library.