Show map by default on /catalog, add offersCount to products

- Change displayMode from 'hero' to 'map-default' for /catalog
- Always show map on catalog page (fullWidthMap when no selectMode)
- Add offersCount to GetProducts, GetProductsBySupplier, GetProductsNearHub
- Remove CatalogHero from catalog page (hero content stays on /)

app/composables/useCatalogSearch.ts

@@ -2,7 +2,7 @@ import type { LocationQuery } from 'vue-router'
 
 export type SelectMode = 'product' | 'supplier' | 'hub' | null
 export type DisplayMode =
-  | 'hero'
+  | 'map-default'
   | 'grid-products'
   | 'grid-suppliers'
   | 'grid-hubs'
@@ -148,8 +148,8 @@ export function useCatalogSearch() {
     if (supplierId.value) return 'grid-products-from-supplier'
     if (hubId.value) return 'grid-products-in-hub'
 
-    // Empty state
-    return 'hero'
+    // Default: show map with all offers
+    return 'map-default'
   })
 
   // Check if we're on the main page (not /catalog)