Replaces the useState + useEffect + apiFetch pattern with TanStack
Query in six admin list pages — same pattern, mechanical refactor:
- admin/tags/tag-list
- admin/ports/port-list
- admin/roles/role-list
- admin/users/user-list
- admin/document-templates/template-list
- admin/webhooks/page
- dashboard/timezone-drift-banner (also: detected-tz reads via
useSyncExternalStore so render stays pure)
Side benefits: list refetches now share a query cache across tabs
(via @tanstack/query-broadcast-client-experimental that was wired
up earlier this branch), so when admin A edits a role in one tab,
admin B's tab sees the updated row without a manual reload.
set-state-in-effect warnings: 51 → 45.
Verified: tsc clean.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>