Add Explore/Quote dual mode to catalog page

- Add CatalogMode type (explore/quote) to useCatalogSearch
- Create ExplorePanel component with view toggle (offers/hubs/suppliers)
- Create QuoteForm and QuotePanel components for search form
- Refactor CatalogPage to fullscreen map with overlay panel
- Simplify catalog/index.vue to use new components
- Add translations for modes and quote form (ru/en)

The catalog now has two modes:
- Explore: Browse map with offers/hubs/suppliers toggle
- Quote: Search form with product/hub/qty filters to find offers

app/composables/useCatalogSearch.ts

@@ -2,6 +2,7 @@ import type { LocationQuery } from 'vue-router'
 
 export type SelectMode = 'product' | 'supplier' | 'hub' | null
 export type MapViewMode = 'offers' | 'hubs' | 'suppliers'
+export type CatalogMode = 'explore' | 'quote'
 export type DisplayMode =
   | 'map-default'
   | 'grid-products'
@@ -228,10 +229,25 @@ export function useCatalogSearch() {
     mapViewCookie.value = mode
   }
 
+  // Catalog mode: explore (map browsing) or quote (search for offers)
+  const catalogMode = computed<CatalogMode>(() => {
+    return route.query.mode === 'quote' ? 'quote' : 'explore'
+  })
+
+  const setCatalogMode = (newMode: CatalogMode) => {
+    updateQuery({ mode: newMode === 'explore' ? null : newMode })
+  }
+
+  // Can search for offers (product + hub or product + supplier required)
+  const canSearch = computed(() => {
+    return !!(productId.value && (hubId.value || supplierId.value))
+  })
+
   return {
     // State
     selectMode,
     displayMode,
+    catalogMode,
     productId,
     supplierId,
     hubId,
@@ -245,6 +261,7 @@ export function useCatalogSearch() {
     // Computed
     activeTokens,
     availableChips,
+    canSearch,
 
     // Actions
     startSelect,
@@ -255,6 +272,7 @@ export function useCatalogSearch() {
     clearAll,
     setLabel,
     setMapViewMode,
+    setCatalogMode,
 
     // Labels cache
     filterLabels