Fix catalog UI: navbar alignment, selection panel, map search, infinite scroll

- Fix team selector alignment in navbar (use items-center, fixed height)
- Fix SelectionPanel header padding to account for parent p-4
- Add map search input (white glass, positioned next to panel)
- Add infinite scroll to SelectionPanel with IntersectionObserver
- Products load all at once (no server-side pagination yet)
- Hubs and Suppliers support pagination with loadMore

i18n/locales/en/catalog.json

@@ -11,7 +11,8 @@
       "refine": "Refine...",
       "searchProducts": "Search products...",
       "searchSuppliers": "Search suppliers...",
-      "searchHubs": "Search hubs..."
+      "searchHubs": "Search hubs...",
+      "searchOnMap": "Search on map..."
     },
     "hero": {
       "title": "Find the best offer",

i18n/locales/ru/catalog.json

@@ -11,7 +11,8 @@
       "refine": "Уточнить...",
       "searchProducts": "Поиск товаров...",
       "searchSuppliers": "Поиск поставщиков...",
-      "searchHubs": "Поиск хабов..."
+      "searchHubs": "Поиск хабов...",
+      "searchOnMap": "Поиск на карте..."
     },
     "hero": {
       "title": "Найдите лучшее предложение",