Missing page: Shopping Cart (/cart)

[snishant0]

Problem

The /cart route is not implemented in the application. When users try to navigate to /cart, they see an empty page with a console warning: "No routes matched location '/cart'"

Expected Behavior

• Users should be able to view items they've added to their shopping cart
• The cart page should display product details (name, image, price, quantity)
• Users should be able to update quantities or remove items
• Show total price calculation
• Provide a button to proceed to checkout

Current Behavior

• Navigation to /cart shows an empty page
• Console warning: "No routes matched location '/cart'"
• Footer links to "My Cart" use placeholder "#" href

Acceptance Criteria

• Create /cart route in React Router
• Implement Cart component with product list
• Show cart item count badge in navigation
• Allow quantity updates and item removal
• Display subtotal and total
• Add "Continue Shopping" and "Proceed to Checkout" buttons
• Handle empty cart state with friendly message
• Update navigation/footer links to point to /cart

Priority

High - This is a core e-commerce feature