Fix catalog map navigation and hover interactions

- Add @select handler to hubs/index.vue and suppliers/index.vue
  for map click navigation
- Add hoveredId props to final pages for point highlighting
  on card hover
- Add "Выберите источник" hint on final pages with sources

app/pages/catalog/offers/[productId]/[hubId].vue

@@ -33,6 +33,8 @@
         map-id="offers-product-hub-sources-map"
         point-color="#10b981"
         v-model:selected-id="selectedSourceUuid"
+        :hovered-id="hoveredSourceUuid"
+        @update:hovered-id="hoveredSourceUuid = $event"
       >
         <template #searchBar>
           <CatalogSearchBar
@@ -45,6 +47,7 @@
         <template #header>
           <Text v-if="sources.length === 0 && !isLoadingRoutes" tone="muted">Нет доступных источников</Text>
           <Stack v-else gap="4">
+            <Text v-if="sources.length > 0" tone="muted">Выберите источник</Text>
             <Card padding="md">
               <div class="h-48">
                 <ClientOnly>
@@ -102,6 +105,7 @@ const isLoadingRoutes = ref(false)
 const hub = ref<any>(null)
 const product = ref<{ uuid: string; name: string } | null>(null)
 const selectedSourceUuid = ref('')
+const hoveredSourceUuid = ref<string>()
 const rawSources = ref<any[]>([])
 const offersData = ref<Map<string, any>>(new Map())