[FEATURE]: Add "Continue Shopping" button on the Cart page

[Git-Shubham14]

🚀 Feature Description

The cart page has no "Continue Shopping" button. Users
who want to add more items must use the browser back button
or navigate manually — breaking the natural shopping flow.

Problem Statement

On every major e-commerce platform, the cart page has two
primary actions:

1. "Continue Shopping" → go back to browsing
2. "Proceed to Checkout" → complete purchase
   Currently only option 2 exists on this cart page.

Proposed Solution

• Add a "← Continue Shopping" button on the cart page
• Clicking it navigates to /shop.html
• Style it as a secondary/outline button so it doesn't
  compete visually with the primary "Checkout" button
• Position it below or beside the checkout button

Benefits

• Keeps users in the shopping flow
• Reduces cart abandonment
• Standard UX pattern on Amazon, Flipkart, Myntra

Suggested Implementation

In frontend/cart.html:
Add a button linking to shop.html styled as outline variant.
In frontend/styles/cart.css:
Add secondary button styles.

Type: Feature / UX

[Git-Shubham14]

Hii @BHUVANSH855 , could you please assign this issue to me under SSOC '2026?

[BhavnaShakya]

Hi @BHUVANSH855, I would like to work on this issue under SSoC'26. The feature is clear and I’d like to implement the Continue Shopping button with proper UI styling and navigation. Could you please assign this issue to me? Thank you!