[PROJECT_REQUIREMENTS]: Build a data management application for a small retail store to manage inventory and stock levels. The system will be used by the store owner and two employees to manage products, monitor stock, and record stock movements. [DATA_AND_FIELDS]: Products: - product_id - product_name - SKU - category - supplier - purchase_price - selling_price - current_stock - minimum_stock Stock Movements: - movement_id - product_id - movement_type - quantity - movement_date - notes Each product must have a unique SKU. Stock quantity must not be negative. [WORKFLOW_AND_USER_ACTIONS]: Users can add new products, edit product information, record incoming stock, record outgoing stock, search products, filter products by category, and view products that have reached their minimum stock level. When incoming stock is recorded, the system should increase the product's current stock. When outgoing stock is recorded, the system should decrease the product's current stock. Users should be able to view the history of stock movements for each product. [TECHNICAL_REQUIREMENTS]: Create a responsive web application using React for the frontend, Node.js with Express for the backend, and MySQL for the database. Use REST APIs for communication between the frontend and backend. Include basic username and password authentication. The application should be suitable for a small business and should avoid unnecessary technical complexity. [REPORTS_AND_OUTPUTS]: Create an inventory dashboard showing: - Total number of products - Total stock units - Products with low stock - Recent stock movements Include reports for inventory levels and stock movement history. Users should be able to search products, filter products by category, filter low-stock products, and export inventory data to CSV.