feat: daemon health panel, brand-rail status chips, user timezone selector

- Health API now surfaces Docker /info + /version (version, platform,
  kernel, container/image counts, storage driver, memory, latency) and
  NPM aggregates (proxy host total, managed-by-Tinyforge count, access
  lists, certificates, endpoint URL).
- Docker/NPM indicators moved out of the sidebar footer and into a
  compact mono-styled rail directly under the Tinyforge brand title,
  with pulse/fault animations and click-to-expand error hints.
- New SystemDaemonsCard on the dashboard: two terminal-styled panels
  (Docker Engine + Proxy) with a running/paused/stopped stacked bar,
  key-value diagnostics, and a total-vs-managed proportion meter on
  the proxy-hosts tile.
- Shared health store so the sidebar and dashboard share a single
  30 s poll instead of duplicating traffic.
- User-facing timezone preference with auto-detect fallback; all
  dates across projects, sites, stacks, settings, backup, event log
  and stale containers now render through \$fmt.date / \$fmt.datetime.
- en/ru translations for both features.

web/src/routes/+page.svelte

@@ -5,9 +5,11 @@
 	import SkeletonCard from '$lib/components/SkeletonCard.svelte';
 	import EmptyState from '$lib/components/EmptyState.svelte';
 	import SystemHealthCard from '$lib/components/SystemHealthCard.svelte';
+	import SystemDaemonsCard from '$lib/components/SystemDaemonsCard.svelte';
 	import ForgeHero from '$lib/components/ForgeHero.svelte';
 	import { IconDeploy, IconAlert } from '$lib/components/icons';
 	import { t } from '$lib/i18n';
+	import { fmt } from '$lib/format/datetime';
 
 	let projects = $state<Project[]>([]);
 	let instancesByProject = $state<Record<string, Instance[]>>({});
@@ -181,6 +183,9 @@
 	<!-- System health summary -->
 	<SystemHealthCard />
 
+	<!-- Detailed daemon panel: Docker engine + NPM/Traefik proxy -->
+	<SystemDaemonsCard />
+
 	<!-- Static sites summary -->
 	{#if !loading}
 		<section class="section">
@@ -219,7 +224,7 @@
 								{/if}
 							</div>
 							{#if site.last_sync_at}
-								<p class="text-xs text-[var(--text-tertiary)]">{$t('sites.lastSync')}: {new Date(site.last_sync_at).toLocaleString()}</p>
+								<p class="text-xs text-[var(--text-tertiary)]">{$t('sites.lastSync')}: {$fmt.dateTime(site.last_sync_at)}</p>
 							{/if}
 						</a>
 					{/each}