Summary: Zwijsen adds shopping cart price display

Why It Matters: The website now shows the total price in the cart header. This makes it easier for users to see how much they are spending while they browse.

What Changed:

• Added a price indicator (€0,00) next to the shopping cart icon.
• Added a "Continue shopping" (Verder winkelen) link to the cart area.
• Added a "Notifications" (Meldingen) section to the interface.