Implement Stage 3: Enhance content generation and metadata features

- Updated AI prompts to include metadata context, cluster roles, and product attributes for improved content generation.
- Enhanced GenerateContentFunction to incorporate taxonomy and keyword objects for richer context.
- Introduced new metadata fields in frontend components for better content organization and filtering.
- Added cluster match, taxonomy match, and relevance score to LinkResults for improved link management.
- Implemented metadata completeness scoring and recommended actions in AnalysisPreview for better content optimization.
- Updated API services to support new metadata structures and site progress tracking.

frontend/src/services/api.ts

@@ -777,6 +777,11 @@ export interface ContentIdea {
   estimated_word_count: number;
   created_at: string;
   updated_at: string;
+  // Stage 3: Metadata fields
+  site_entity_type?: string | null;
+  cluster_role?: string | null;
+  taxonomy_id?: number | null;
+  taxonomy_name?: string | null;
 }
 
 export interface ContentIdeaCreateData {
@@ -887,6 +892,7 @@ export interface TasksFilters {
   cluster_id?: string;
   content_type?: string;
   content_structure?: string;
+  entity_type?: string; // Stage 3: Entity type filter
   page?: number;
   page_size?: number;
   ordering?: string;
@@ -927,6 +933,11 @@ export interface Task {
   post_url?: string | null;
   created_at: string;
   updated_at: string;
+  // Stage 3: Metadata fields
+  entity_type?: string | null;
+  taxonomy_id?: number | null;
+  taxonomy_name?: string | null;
+  cluster_role?: string | null;
 }
 
 export interface TaskCreateData {
@@ -2103,6 +2114,45 @@ export async function fetchSiteBlueprintById(id: number): Promise<SiteBlueprint>
   return fetchAPI(`/v1/site-builder/blueprints/${id}/`);
 }
 
+// Stage 3: Site Progress API
+export interface SiteProgress {
+  blueprint_id: number;
+  blueprint_name: string;
+  overall_status: 'in_progress' | 'complete' | 'blocked';
+  cluster_coverage: {
+    total_clusters: number;
+    covered_clusters: number;
+    details: Array<{
+      cluster_id: number;
+      cluster_name: string;
+      role: string;
+      coverage_status: string;
+      validation_messages: string[];
+      tasks_count: number;
+      content_count: number;
+      hub_pages: number;
+      supporting_pages: number;
+      attribute_pages: number;
+      is_complete: boolean;
+    }>;
+  };
+  taxonomy_coverage: {
+    total_taxonomies: number;
+    defined_taxonomies: number;
+    details: any[];
+  };
+  validation_flags: {
+    clusters_attached: boolean;
+    taxonomies_defined: boolean;
+    sitemap_generated: boolean;
+    all_pages_generated: boolean;
+  };
+}
+
+export async function fetchSiteProgress(blueprintId: number): Promise<SiteProgress> {
+  return fetchAPI(`/v1/site-builder/blueprints/${blueprintId}/progress/`);
+}
+
 export async function createSiteBlueprint(data: Partial<SiteBlueprint>): Promise<SiteBlueprint> {
   return fetchAPI('/v1/site-builder/blueprints/', {
     method: 'POST',