Fix catalog: selection panels instead of modals, remove duplicate QuoteForm

- Add SelectionPanel.vue for product/hub/supplier selection lists
- Remove QuoteForm from QuotePanel (header already has controls)
- Show SelectionPanel when selectMode is active
- Connect search button in header to page via shared state

app/layouts/topnav.vue

@@ -244,14 +244,16 @@ const toggleTheme = () => {
   theme.value = theme.value === 'night' ? 'cupcake' : 'night'
 }
 
-// Search handler for Quote mode - emits event that page can handle
+// Search handler for Quote mode - triggers search via shared state
 const localePath = useLocalePath()
 const router = useRouter()
+const searchTrigger = useState<number>('catalog-search-trigger', () => 0)
 const onSearch = () => {
-  // Navigate to catalog page which will handle the search
+  // Navigate to catalog page if not there
   if (!route.path.includes('/catalog')) {
     router.push({ path: localePath('/catalog'), query: { ...route.query, mode: 'quote' } })
   }
-  // The page component will react to canSearch becoming true and perform the search
+  // Trigger search by incrementing the counter (page watches this)
+  searchTrigger.value++
 }
 </script>