fix: ground-truth crash on col_type + remove AIToolsSidebarResponsive from model-management

- Ground-truth: zone.columns use 'label' not 'col_type' — calling
  .replace() on undefined crashed the page after grid data loaded
- Model-management: same AIToolsSidebarResponsive wrapper bug as the
  other pages — does not render children

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

admin-lehrer/app/(admin)/ai/ocr-ground-truth/page.tsx

@@ -466,7 +466,7 @@ export default function GroundTruthReviewPage() {
                           Zone {zi + 1} ({zone.zone_type})
                           {zone.columns?.length > 0 && (
                             <span className="ml-2">
-                              {zone.columns.map(c => c.col_type.replace('column_', '')).join(' | ')}
+                              {zone.columns.map((c: any) => (c.label || c.col_type || '').replace('column_', '')).join(' | ')}
                             </span>
                           )}
                         </div>