feat: Complete Stage 2 frontend refactor

- Removed deprecated fields from Content and Task models, including entity_type, sync_status, and cluster_role.
- Updated Content model to include new fields: content_type, content_structure, taxonomy_terms, source, external_id, and cluster_id.
- Refactored Writer module components (Content, ContentView, Dashboard, Tasks) to align with new schema.
- Enhanced Dashboard metrics and removed unused filters.
- Implemented ClusterDetail page to display cluster information and associated content.
- Updated API service interfaces to reflect changes in data structure.
- Adjusted sorting and filtering logic across various components to accommodate new field names and types.
- Improved user experience by providing loading states and error handling in data fetching.

frontend/src/pages/Writer/Content.tsx

@@ -37,7 +37,6 @@ export default function Content() {
   const [searchTerm, setSearchTerm] = useState('');
   const [statusFilter, setStatusFilter] = useState('');
   const [sourceFilter, setSourceFilter] = useState('');
-  const [syncStatusFilter, setSyncStatusFilter] = useState('');
   const [selectedIds, setSelectedIds] = useState<string[]>([]);
   
   // Pagination state
@@ -46,7 +45,7 @@ export default function Content() {
   const [totalCount, setTotalCount] = useState(0);
   
   // Sorting state
-  const [sortBy, setSortBy] = useState<string>('generated_at');
+  const [sortBy, setSortBy] = useState<string>('created_at');
   const [sortDirection, setSortDirection] = useState<'asc' | 'desc'>('desc');
   const [showContent, setShowContent] = useState(false);
 
@@ -59,13 +58,12 @@ export default function Content() {
     setLoading(true);
     setShowContent(false);
     try {
-      const ordering = sortBy ? `${sortDirection === 'desc' ? '-' : ''}${sortBy}` : '-generated_at';
+      const ordering = sortBy ? `${sortDirection === 'desc' ? '-' : ''}${sortBy}` : '-created_at';
       
       const filters: ContentFilters = {
         ...(searchTerm && { search: searchTerm }),
         ...(statusFilter && { status: statusFilter }),
         ...(sourceFilter && { source: sourceFilter }),
-        ...(syncStatusFilter && { sync_status: syncStatusFilter }),
         page: currentPage,
         page_size: pageSize,
         ordering,
@@ -224,7 +222,6 @@ export default function Content() {
           search: searchTerm,
           status: statusFilter,
           source: sourceFilter,
-          sync_status: syncStatusFilter,
         }}
         onFilterChange={(key: string, value: any) => {
           if (key === 'search') {
@@ -235,9 +232,6 @@ export default function Content() {
           } else if (key === 'source') {
             setSourceFilter(value);
             setCurrentPage(1);
-          } else if (key === 'sync_status') {
-            setSyncStatusFilter(value);
-            setCurrentPage(1);
           }
         }}
         pagination={{
@@ -257,7 +251,7 @@ export default function Content() {
         }}
         headerMetrics={headerMetrics}
         onRowAction={handleRowAction}
-        getItemDisplayName={(row: ContentType) => row.meta_title || row.title || `Content #${row.id}`}
+        getItemDisplayName={(row: ContentType) => row.title || `Content #${row.id}`}
       />
 
       {/* Module Metrics Footer */}
@@ -274,17 +268,10 @@ export default function Content() {
           {
             title: 'Draft',
             value: content.filter(c => c.status === 'draft').length.toLocaleString(),
-            subtitle: `${content.filter(c => c.status === 'review').length} in review`,
+            subtitle: `${content.filter(c => c.status === 'published').length} published`,
             icon: <TaskIcon className="w-5 h-5" />,
             accentColor: 'blue',
           },
-          {
-            title: 'Synced',
-            value: content.filter(c => c.sync_status === 'synced').length.toLocaleString(),
-            subtitle: `${content.filter(c => c.sync_status === 'pending').length} pending`,
-            icon: <CheckCircleIcon className="w-5 h-5" />,
-            accentColor: 'purple',
-          },
         ]}
         progress={{
           label: 'Content Publishing Progress',