Improve website settings and special-item pick UX.

Tighten sitemap/settings controls, debounce product search to 10 results, keep catalog-only specials visible after add, and use frosted glass on link/category modals.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/business/src/pages/StoreSpecialsPage.tsx

@@ -262,7 +262,7 @@ export function StoreSpecialsPage() {
     const existingIds = pickItemsTarget.items.map((item) =>
       fromProducts ? item.productId : item.id,
     )
-    const nextIds = [...existingIds, ...ids]
+    const nextIds = [...new Set([...existingIds, ...ids])]
 
     setIsSaving(true)
     setError('')
@@ -276,11 +276,10 @@ export function StoreSpecialsPage() {
       setPickItemsTarget(null)
       showToast(t('website.specialItems.toastAdded'), 'success')
     } catch (err) {
-      if (err instanceof ApiError) {
-        setError(err.message)
-      } else {
-        setError(t('website.specialItems.errorAdd'))
-      }
+      const message =
+        err instanceof ApiError ? err.message : t('website.specialItems.errorAdd')
+      setError(message)
+      throw err instanceof Error ? err : new Error(message)
     } finally {
       setIsSaving(false)
     }