Refactor catalog layout: mode toggle to top right, view toggle to top left

- Move Explore/Quote mode toggle to top right corner
- Add view toggle (Offers/Hubs/Suppliers) to top left in Explore mode
- Panel shows only in Quote mode when showPanel prop is true
- Simplified panel slot structure

app/pages/catalog/index.vue

@@ -6,10 +6,11 @@
     map-id="unified-catalog-map"
     :point-color="mapPointColor"
     :items="[]"
+    :show-panel="showPanel"
     @select="onMapSelect"
   >
-    <!-- Quote panel slot -->
-    <template #quote-panel>
+    <!-- Panel slot - shows Quote form or selection list -->
+    <template #panel>
       <QuotePanel
         :product-id="productId"
         :product-label="getFilterLabel('product', productId)"
@@ -140,6 +141,9 @@ const showQuoteResults = ref(false)
 // Loading state
 const isLoading = computed(() => offersLoading.value)
 
+// Show panel when in Quote mode
+const showPanel = computed(() => catalogMode.value === 'quote')
+
 // Get filter label from cache
 const getFilterLabel = (type: string, id: string | undefined): string | undefined => {
   if (!id) return undefined