feat(07.1-05): user-tz on shared client components

- DetailModal: thread tz through resolveLabel(...) module helper +
  default export's 3 inline date/time calls.
- IntegrationStatusTabs: thread tz through fmtDate helper +
  VeeamTab sub-component prop.
- SyncScheduler: thread tz into closure-scoped formatDate helper.
- audit-log-table, user-table, user-sessions, active-sessions: inline
  toLocale calls in component body.
- analysis-view: useUserTimezone in AnalysisView; thread tz into 4
  toLocaleString calls.
- resolution-trend, volume-trend (recharts): module-scope fmtDate(iso)
  → fmtDate(iso, tz); useUserTimezone in named export; thread tz into
  axis tickFormatter + tooltip labelFormatter.
- ticket-detail-modal: thread tz into formatDate arrow inside
  TicketDetailModal.
- TimelineView: useUserTimezone; thread tz into 4 toLocale*String calls
  (hour/day/month/event-time formatters).
- ScoreCard: useUserTimezone in AggregateScoreCard; thread tz into the
  date-range latest call.
- addigy-tab: useUserTimezone in AddigyTab; thread tz into 2 inline calls.
- activity-sparkline: module-scope fmtHour(iso) → fmtHour(iso, tz);
  useUserTimezone in ActivitySparkline; update 3 callsites in title/aria.
- compliance-detail-table: thread tz from ComplianceDetailTable into
  ContractCoverageModal sub-component (2 inline date calls).
- company-backup-detail: module-scope formatDate(d) → formatDate(d, tz);
  useUserTimezone in CompanyBackupDetail; update 3 callsites.

Migrates 31 of 81 audit leak callsites.

components/status/activity-sparkline.tsx

@@ -13,6 +13,7 @@
 'use client';
 
 import { cn } from '@/lib/utils';
+import { useUserTimezone } from '@/lib/hooks/use-user-timezone';
 
 interface ActivityBucket {
   hour: string;
@@ -26,10 +27,11 @@ interface ActivitySparklineProps {
   height?: number;
 }
 
-function fmtHour(iso: string): string {
+function fmtHour(iso: string, tz: string): string {
   return new Date(iso).toLocaleTimeString(undefined, {
     hour: 'numeric',
     minute: '2-digit',
+    timeZone: tz,
   });
 }
 
@@ -38,6 +40,7 @@ export function ActivitySparkline({
   className,
   height = 32,
 }: ActivitySparklineProps) {
+  const tz = useUserTimezone();
   if (data.length === 0) {
     return null;
   }
@@ -57,10 +60,10 @@ export function ActivitySparkline({
             key={bucket.hour}
             title={
               empty
-                ? `${fmtHour(bucket.hour)} · idle`
-                : `${fmtHour(bucket.hour)} · ${bucket.success} ok · ${bucket.failure} fail`
+                ? `${fmtHour(bucket.hour, tz)} · idle`
+                : `${fmtHour(bucket.hour, tz)} · ${bucket.success} ok · ${bucket.failure} fail`
             }
-            aria-label={`${fmtHour(bucket.hour)}: ${bucket.success} ok, ${bucket.failure} fail`}
+            aria-label={`${fmtHour(bucket.hour, tz)}: ${bucket.success} ok, ${bucket.failure} fail`}
             className="relative flex-1 min-w-[1px] flex flex-col-reverse rounded-[1px] overflow-hidden"
             style={{ height: `${empty ? 12 : Math.max(totalPct, 8)}%` }}
             data-bucket-index={i}