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/index.vue

@@ -132,11 +132,14 @@ const isSelected = (type: 'address' | 'hub', uuid: string) => {
 
 const goToRequestIfReady = () => {
   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 true