feat(07.1-05): user-tz on dashboard, quotes, veeam-analysis

- dashboard/page.tsx: thread tz into PageHeader description's
  toLocaleDateString call.
- quotes/page.tsx: thread tz into formatDate arrow helper inside the
  default export.
- veeam-analysis/page.tsx: thread tz into the summary footer's
  generated-at toLocaleString call.

Migrates 3 of 81 audit leak callsites.

app/dashboard/page.tsx

@@ -33,6 +33,7 @@ import {
   TrendingUp,
   Timer,
 } from 'lucide-react';
+import { useUserTimezone } from '@/lib/hooks/use-user-timezone';
 
 interface Overview {
   today: {
@@ -105,6 +106,7 @@ function relTime(iso: string | null): string {
 }
 
 export default function DashboardPage() {
+  const tz = useUserTimezone();
   const [data, setData] = useState<Overview | null>(null);
   const [trends, setTrends] = useState<Trends | null>(null);
   const [error, setError] = useState<string | null>(null);
@@ -154,6 +156,7 @@ export default function DashboardPage() {
           year: 'numeric',
           month: 'long',
           day: 'numeric',
+          timeZone: tz,
         })}
         accent
         watermark