i have a project to do this is document of project:

"

Take-Home Assignment: React-Based Checkout System
Project Title: Dynamic Checkout System
Objective: The goal of this assignment is to assess you ability to build a complex React application that manages dynamic pricing rules, applies discounts, and handles a wide range of edge cases. The focus will be on state management, performance optimization, and user experience.
Project Brief:
Create a React-based Checkout System that simulates a retail checkout process. The system should allow users to scan items, apply various pricing rules, and see the final total with any applicable discounts.
Requirements:
1.	Product Scanning:
o	Implement a feature where users can scan (or select) items by entering their SKU.
o	Display the scanned items in a list, showing the product name, quantity, individual price, and subtotal.
2.	Dynamic Pricing Rules:
o	Implement a system to manage and apply dynamic pricing rules. These rules should include:
	'Buy N for X': E.g., Buy 3 for $10.
	Volume Pricing: E.g., Buy 2 get 1 free.
	Percentage Discounts: E.g., 20% off if the total exceeds $50.
o	Ensure that the system can handle multiple pricing rules simultaneously and apply the most beneficial rule for the customer.
3.	Checkout Summary:
o	Display a summary of the items, including total price, discounts applied, and the final amount payable.
o	Allow users to modify quantities or remove items, updating the pricing and discounts in real-time.
4.	State Management:
o	Use Context API or Redux to manage the global state of the shopping cart, pricing rules, and discount logic.
o	Ensure that the state persists even if the page is refreshed or the user navigates away and returns.
5.	Responsive Design:
o	The application should be fully responsive and user-friendly on both desktop and mobile devices.
o	Provide a clean and intuitive UI/UX that makes the checkout process simple and clear.
6.	Testing:
o	Write unit and integration tests for key components using Jest and React Testing Library.
o	Include tests for pricing rules, state management, and rendering of the checkout summary.
7.	Performance Optimization:
o	Optimize the application for performance, ensuring quick re-renders and efficient state updates.
o	Implement memoization where appropriate to avoid unnecessary recalculations and re-renders.
8.	Error Handling:
o	Implement error handling for invalid SKUs, pricing rule conflicts, and other edge cases.
o	Provide clear and user-friendly error messages.
Bonus:
1.	Coupon Codes:
o	Implement a feature to apply promotional coupon codes that offer additional discounts.
2.	Localization:
o	Provide support for multiple currencies and languages, making the application adaptable to different regions.
3.	Real-time Data Updates:
o	Use WebSockets or another real-time communication method to update pricing rules or product information dynamically without refreshing the page.
Submission Guidelines:
•	Deadline: Provide a timeline of 5-7 days for completion.
•	Deliverables:
o	A GitHub repository with the source code.
o	A README.md file with instructions on how to run the project locally.
o	An explanation of design decisions, state management approach, and any trade-offs made during development.
o	Optionally, deploy the application to a service like Vercel, Netlify, or GitHub Pages, and provide the live demo URL.
Evaluation Criteria:
•	Code Quality: Clean, maintainable, and well-documented code.
•	Functionality: The application meets the requirements and handles complex pricing rules effectively.
•	UI/UX Design: The interface is intuitive, responsive, and user-friendly.
•	Performance: The application performs well under various scenarios, with quick updates and smooth interactions.
•	Problem-Solving: How well the candidate handles edge cases and integrates dynamic pricing logic.
•	Testing: Quality and coverage of tests.
•	Creativity: Any extra features or enhancements beyond the core requirements.
This take-home assignment will allow the you to showcase their ability to work on a real-world problem, focusing on complex logic implementation, state management, and user experience in a React application."

i decided to build this project using next js 14 app router, so now i have a question base on this documentation am i need to implement authentication to this project?