feat: build and wire the Quick View modal

The Quick View button (search results page only) emitted
quickViewPlaceholder with zero listeners anywhere up the chain - the
button did nothing. Built a minimal QuickViewDialogComponent (image,
name, price incl. discount, short description, Add to Cart, link to
full product page) and wired the event through product-grid ->
search-results -> catalog-container, which fetches the product via
ProductFacade and opens the dialog.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/i18n/en.ts

@@ -273,6 +273,7 @@ export const en: Translations = {
     compare: 'Compare',
     share: 'Share',
     quickView: 'Quick view',
+    quickViewDetails: 'View full details',
     stockHigh: 'In stock',
     stockMedium: 'Limited stock',
     stockLow: 'Almost gone',