Add entity color scheme and improve map hover effect

- Add color scheme: product/offer=orange, supplier=blue, hub=green
- Remove 'location' filter (same as hub)
- Quantity filter appears only after product is selected
- Map hover shows 'target' ring effect (outer white ring)
- Tokens in header use entity-specific colors

app/pages/catalog/index.vue

@@ -143,11 +143,14 @@ const clusterNodeType = computed(() => {
   return 'logistics'
 })
 
+// Import entity colors
+const { entityColors } = useCatalogSearch()
+
 const mapPointColor = computed(() => {
-  if (cardType.value === 'supplier') return '#3b82f6'
-  if (cardType.value === 'hub') return '#10b981'
-  if (cardType.value === 'offer') return '#22c55e'
-  return '#f59e0b'
+  if (cardType.value === 'supplier') return entityColors.supplier // blue
+  if (cardType.value === 'hub') return entityColors.hub // green
+  if (cardType.value === 'offer') return entityColors.offer // orange
+  return entityColors.product // orange
 })
 
 const headerText = computed(() => {