Add suggested products to product detail page

[tal-mb]

Summary

• Adds a "You might also like" section beneath the product details on the product detail page
• Displays a horizontally scrollable row of product cards (image, name, price) excluding the current product
• Clicking a suggested product navigates to its detail page
• Styled consistently with the existing MetalMart design system (purple accents, hover effects, card animations)

Test plan

• Open any product detail page and verify the "You might also like" section appears below the product info
• Confirm the current product is excluded from the suggestions
• Click a suggested product card and verify it navigates to that product's detail page
• Test horizontal scrolling when there are more products than fit on screen
• Verify responsive behavior on mobile and desktop viewports

https://claude.ai/code/session_01WVN6H4UJhyiRkpJbH2tajc

[github-actions]

mirrord Preview Environment - Metal Mart

Preview environments are running for this PR.

Service	Target
metal-mart-frontend	deployment/metal-mart-frontend

Preview URL	https://playground.metalbear.dev/shop
Header	baggage: mirrord=suggested-products

To send traffic to this preview:

• Use the mirrord Browser Extension and set the header for this URL, or
• curl -H "baggage: mirrord=suggested-products" https://playground.metalbear.dev/shop

Preview is stopped when the PR is merged or closed.