Refactor Site Builder Integration and Update Component Structure

- Removed the separate `igny8_sites` service from Docker Compose, integrating its functionality into the main app.
- Updated the Site Builder components to enhance user experience, including improved loading states and error handling.
- Refactored routing and navigation in the Site Builder Wizard and Preview components for better clarity and usability.
- Adjusted test files to reflect changes in import paths and ensure compatibility with the new structure.

frontend/src/store/builderStore.ts

@@ -40,6 +40,7 @@ interface BuilderState {
   currentStep: number;
   isSubmitting: boolean;
   isGenerating: boolean;
+  isLoadingBlueprint: boolean;
   error?: string;
   activeBlueprint?: SiteBlueprint;
   pages: PageBlueprint[];
@@ -67,6 +68,7 @@ interface BuilderState {
   togglePageSelection: (pageId: number) => void;
   selectAllPages: () => void;
   clearPageSelection: () => void;
+  loadBlueprint: (blueprintId: number) => Promise<void>;
   generateAllPages: (blueprintId: number, force?: boolean) => Promise<void>;
 }
 
@@ -75,6 +77,7 @@ export const useBuilderStore = create<BuilderState>((set, get) => ({
   currentStep: 0,
   isSubmitting: false,
   isGenerating: false,
+  isLoadingBlueprint: false,
   pages: [],
   selectedPageIds: [],
 
@@ -221,6 +224,41 @@ export const useBuilderStore = create<BuilderState>((set, get) => ({
 
   clearPageSelection: () => set({ selectedPageIds: [] }),
 
+  loadBlueprint: async (blueprintId: number) => {
+    set({ isLoadingBlueprint: true, error: undefined });
+    try {
+      const [blueprint, pages] = await Promise.all([
+        siteBuilderApi.getBlueprint(blueprintId),
+        siteBuilderApi.listPages(blueprintId),
+      ]);
+      set({
+        activeBlueprint: blueprint,
+        pages,
+        selectedPageIds: [],
+      });
+      if (blueprint.structure_json) {
+        useSiteDefinitionStore.getState().setStructure(blueprint.structure_json);
+      } else {
+        useSiteDefinitionStore.getState().setStructure({
+          site: undefined,
+          pages: pages.map((page) => ({
+            slug: page.slug,
+            title: page.title,
+            type: page.type,
+            blocks: page.blocks_json,
+          })),
+        });
+      }
+      useSiteDefinitionStore.getState().setPages(pages);
+    } catch (error: any) {
+      set({
+        error: error?.message || "Unable to load blueprint",
+      });
+    } finally {
+      set({ isLoadingBlueprint: false });
+    }
+  },
+
   generateAllPages: async (blueprintId: number, force = false) => {
     const { selectedPageIds } = get();
     set({ isGenerating: true, error: undefined, generationProgress: undefined });