Refactor CreditBalanceViewSet for improved error handling and account retrieval. Update PublisherViewSet registration to root level for cleaner URL structure. Adjust siteBuilder.api.ts to reflect new endpoint for deploying blueprints.

frontend/src/services/siteBuilder.api.ts

@@ -162,6 +162,7 @@ export const siteBuilderApi = {
    * Deploy a blueprint to Sites renderer
    */
   async deployBlueprint(blueprintId: number): Promise<{ success: boolean; deployment_url?: string; deployment_id?: number }> {
+    // PublisherViewSet is now registered with empty prefix, so URL is /publisher/deploy/{id}/
     const response = await fetchAPI(`/v1/publisher/deploy/${blueprintId}/`, {
       method: 'POST',
     });