Implement unified catalog search with token-based filtering

- Add useCatalogSearch composable for managing unified search state
- Add UnifiedSearchBar component with token chips for filters
- Add CatalogHero component for empty/landing state
- Create grid components for each display mode:
  - CatalogGridProducts, CatalogGridSuppliers, CatalogGridHubs
  - CatalogGridHubsForProduct, CatalogGridProductsFromSupplier
  - CatalogGridProductsInHub, CatalogGridOffers
- Add unified catalog page at /catalog with query params
- Remove SubNavigation from catalog section (kept for other sections)
- Update all links to use new unified catalog paths
- Delete old nested catalog pages (offers/suppliers/hubs flows)
- Add i18n translations for catalog section

app/pages/select-location/map.vue

@@ -76,11 +76,14 @@ const selectItem = async (item: any) => {
     searchStore.setLocation(item.name)
     searchStore.setLocationUuid(item.uuid)
     if (route.query.after === 'request' && searchStore.searchForm.productUuid && searchStore.searchForm.locationUuid) {
-      const query: Record<string, string> = {}
+      const query: Record<string, string> = {
+        product: searchStore.searchForm.productUuid,
+        hub: searchStore.searchForm.locationUuid
+      }
       if (searchStore.searchForm.quantity) query.quantity = String(searchStore.searchForm.quantity)
 
       router.push({
-        path: `/catalog/offers/${searchStore.searchForm.productUuid}/${searchStore.searchForm.locationUuid}`,
+        path: `/catalog`,
         query
       })
       return