Enhance Site Builder Functionality and UI Components

- Added a new method to fetch blueprints from the API, improving data retrieval for site structures.
- Updated the WizardPage component to include a progress modal for better user feedback during site structure generation.
- Refactored state management in builderStore to track structure generation tasks, enhancing the overall user experience.
- Replaced SyncIcon with RefreshCw in integration components for a more consistent iconography.
- Improved the site structure generation prompt in utils.py to provide clearer instructions for AI-driven site architecture.

site-builder/src/api/builder.api.ts

@@ -31,6 +31,10 @@ export interface GenerateStructurePayload {
 }
 
 export const builderApi = {
+  async getBlueprint(blueprintId: number): Promise<SiteBlueprint> {
+    const res = await client.get(`/blueprints/${blueprintId}/`);
+    return res.data;
+  },
   async listBlueprints(): Promise<SiteBlueprint[]> {
     const res = await client.get('/blueprints/');
     if (Array.isArray(res.data?.results)) {