Enhance Header interactivity and clean up HoverCard structure:

- **Mobile menu improvements**: Added functionality to close the menu when navigation links are clicked.
- **HoverCard cleanup**: Removed unused title and date markup for a leaner structure.

src/components/HoverCard.astro

@@ -5,8 +5,6 @@ const {title, description, image = "", date} = Astro.props;
 ---
 
 <article class="hover-card">
-	{title && <h3 class="card-title">{title}</h3>}
-	{date && <p class="card_date">{date}</p>}
 	<div class="image-container">
 		<img class="card-image" src={image} alt={title} />
 	</div>