I'll create a practical Gantt chart creator with a black and white minimalist design that can export the chart in .jpg, .png, and .svg formats. This will be a simple React application using the shadcn/ui components and a chart library for the Gantt chart visualization.

Let's start by creating the main components and the necessary utility functions:

This implementation creates a practical Gantt chart creator with a black and white minimalist design. Users can add tasks through the form, view the Gantt chart, and export it in .jpg, .png, and .svg formats.

Key features of this implementation:

1. Minimalist Design: The chart uses a black and white color scheme with simple shapes for a clean, minimalist look.
2. Task Management: Users can add tasks with names, start dates, end dates, and progress percentages.
3. Gantt Chart Visualization: The chart displays tasks in a timeline format, showing their durations and progress.
4. Export Functionality: Users can export the chart in .jpg, .png, and .svg formats using the export buttons.

To use this Gantt chart creator:

1. Add tasks using the form at the top of the page.
2. The Gantt chart will update automatically as you add tasks.
3. Use the export buttons to download the chart in your preferred format.

Note that you may need to install the following dependencies:

This implementation provides a simple and practical Gantt chart creator that meets your requirements for a minimalist design and export capabilities.

It seems the react-gantt-chart library doesn't have a Chart component as expected. Let's revise the code to use a different library that's more suitable for our Gantt chart needs. We'll use @devexpress/dx-react-scheduler which provides a Gantt chart component.

Let's update our project to use the DevExpress Scheduler component for our Gantt chart:

These changes address the error by replacing the non-existent react-gantt-chart library with @devexpress/dx-react-scheduler. This library provides a more robust and feature-rich Gantt chart component.

To use this updated version, you'll need to install the following dependencies:

This implementation still provides a practical Gantt chart creator with a minimalist design. Users can add tasks, view them in a timeline format, and export the chart. The main differences are:

1. The chart now uses a week view by default, which can be adjusted as needed.
2. Tasks can be dragged and dropped to adjust their timing.
3. The form now uses datetime-local inputs for more precise scheduling.

The export functionality remains the same, allowing users to download the chart in .jpg, .png, and .svg formats.