refactor(design): adopt TanStack DataTable on /veeam-analysis, fill gaps

Follow-on polish for the nav-design overhaul (#9bfb575).

- /veeam-analysis migrates the bespoke TicketRow + custom pagination to
  the new DataTable using getRowCanExpand + renderSubRow. Drops ~85
  lines of fragment/colspan markup in favor of the standard pattern.

- PageHeader on the last common stragglers — /settings,
  /settings/security, /sentinelone/coverage, /sentinelone/mappings.
  Settings is reachable from the new top-bar UserMenu so it had to
  match the rest of the visual system.

- /dashboard and /status load with the new Skeleton helpers
  (SkeletonRows, SkeletonChart, SkeletonTable) so loading shells now
  approximate the post-load layout instead of a single h-NN bar.

- DESIGN.md: closed the straggler PageHeader item; deprioritized the
  hard-coded palette audit with a note that ~770 references are mostly
  semantic via the documented bg-{hue}-500/15 / text-{hue}-700 recipe.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/status/page.tsx

@@ -15,6 +15,7 @@ import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Alert, AlertDescription, AlertTitle } from '@/components/ui/alert';
 import { Button } from '@/components/ui/button';
 import { Skeleton } from '@/components/ui/skeleton';
+import { SkeletonTable } from '@/components/ui/skeleton-helpers';
 import { EmptyState } from '@/components/ui/empty-state';
 import { StatusLight, type StatusLightState } from '@/components/ui/status-light';
 import { StatusBadge } from '@/components/ui/status-badge';
@@ -409,9 +410,7 @@ export default function StatusPage() {
           </CardHeader>
           <CardContent className="p-0">
             {!overview ? (
-              <div className="px-6 py-6">
-                <Skeleton className="h-32" />
-              </div>
+              <SkeletonTable rows={6} cols={5} />
             ) : overview.syncHealth.length === 0 ? (
               <div className="px-6 py-6">
                 <EmptyState