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/pages/catalog/offers/[productId]/[hubId].vue

@@ -74,7 +74,7 @@
             :start-name="item.name"
             :end-name="hub?.name"
             :kyc-profile-uuid="getOfferData(item.uuid)?.kycProfileUuid"
-            @select="navigateTo(localePath(`/catalog/offers/${item.uuid}`))"
+            @select="navigateTo(localePath(`/catalog/offers/detail/${item.uuid}`))"
           />
         </template>