Fix route conflict: move offer detail page to /offers/detail/[offerId]

- Change theme from cmyk to cupcake
- Move [offerId].vue to detail/[offerId].vue to avoid conflict with [productId]/index.vue
- Update all navigation references to use new /catalog/offers/detail/ path

app/components/CalcResultContent.vue

@@ -180,7 +180,7 @@ const getKycProfileUuid = (offerUuid?: string | null) => {
 // Navigate to offer detail page
 const navigateToOffer = (offerUuid?: string | null) => {
   if (!offerUuid) return
-  navigateTo(localePath(`/catalog/offers/${offerUuid}`))
+  navigateTo(localePath(`/catalog/offers/detail/${offerUuid}`))
 }
 
 // Load offer details for prices