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/configuration-items/addigy-tab.tsx

@@ -15,12 +15,14 @@ import {
   AlertCircle
 } from 'lucide-react';
 import { AddigyDevice } from '@/lib/types/addigy';
+import { useUserTimezone } from '@/lib/hooks/use-user-timezone';
 
 interface AddigyTabProps {
   device?: AddigyDevice;
 }
 
 export function AddigyTab({ device }: AddigyTabProps) {
+  const tz = useUserTimezone();
   if (!device) {
     return (
       <Card className="border-0 shadow-lg">
@@ -104,7 +106,7 @@ export function AddigyTab({ device }: AddigyTabProps) {
                 <div>
                   <Label>Last Check In</Label>
                   <p className="text-sm text-muted-foreground mt-1">
-                    {new Date(device['Last Check In']).toLocaleString()}
+                    {new Date(device['Last Check In']).toLocaleString(undefined, { timeZone: tz })}
                   </p>
                 </div>
               )}
@@ -324,7 +326,7 @@ export function AddigyTab({ device }: AddigyTabProps) {
                 <div>
                   <Label>Warranty</Label>
                   <p className="text-sm text-muted-foreground mt-1">
-                    Expires: {new Date(device['Warranty Expiration Date']).toLocaleDateString()}
+                    Expires: {new Date(device['Warranty Expiration Date']).toLocaleDateString(undefined, { timeZone: tz })}
                     {device['Warranty Days Left'] !== undefined && (
                       <span className="ml-2">({device['Warranty Days Left']} days left)</span>
                     )}