Fix map points: icons, color updates, loading state

- Add entityType prop to CatalogMap for icon selection
- Change circle layers to symbol layers with entity-specific icons
- Icons: shopping bag (offers), warehouse (hubs), factory (suppliers)
- Add watcher to update colors when pointColor/entityType changes
- Clear old points and show loading indicator when switching view modes
- Add clearNodes function to useClusteredNodes composable

app/composables/useClusteredNodes.ts

@@ -44,9 +44,14 @@ export function useClusteredNodes(
     }
   }
 
+  const clearNodes = () => {
+    clusteredNodes.value = []
+  }
+
   return {
     clusteredNodes,
     loading,
-    fetchClusters
+    fetchClusters,
+    clearNodes
   }
 }