feat: remove Data Completeness module

src/App.tsx

@@ -4,7 +4,6 @@ import { AppState, ExcelRow, COLUMNS } from './types';
 import { Sidebar } from './components/Sidebar';
 import { TopBar } from './components/TopBar';
 import { ProductDescriptions } from './components/ProductDescriptions';
-import { DataCompleteness } from './components/DataCompleteness';
 import { MatrixView } from './components/MatrixView';
 import { UploadReload } from './components/UploadReload';
 import { EditPanel } from './components/EditPanel';
@@ -18,7 +17,7 @@ export default function App() {
     fileDate: null,
     hasUnsavedChanges: false
   });
-  const [activeModule, setActiveModule] = useState<'descriptions' | 'completeness' | 'matrix' | 'upload'>('descriptions');
+  const [activeModule, setActiveModule] = useState<'descriptions' | 'matrix' | 'upload'>('descriptions');
   const [editingRowIndex, setEditingRowIndex] = useState<number | null>(null);
   const [isLoadingDefault, setIsLoadingDefault] = useState(true);
   const [defaultLoadError, setDefaultLoadError] = useState<string | null>(null);
@@ -228,9 +227,6 @@ export default function App() {
                   onEdit={(index) => setEditingRowIndex(index)} 
                 />
               )}
-              {activeModule === 'completeness' && (
-                <DataCompleteness data={appState.data} headers={appState.headers} />
-              )}
               {activeModule === 'matrix' && (
                 <MatrixView data={appState.data} headers={appState.headers} />
               )}

src/components/Sidebar.tsx

@@ -10,7 +10,6 @@ interface SidebarProps {
 export function Sidebar({ activeModule, setActiveModule }: SidebarProps) {
   const navItems = [
     { id: 'descriptions', label: 'Product Descriptions', icon: FileText },
-    { id: 'completeness', label: 'Data Completeness', icon: CheckSquare },
     { id: 'matrix', label: 'Matrix', icon: Table },
     { id: 'upload', label: 'Upload / Reload', icon: Upload },
   ] as const;