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/lib/components/StaleContainerCard.svelte

@@ -5,6 +5,7 @@
 	import type { StaleContainer } from '$lib/types';
 	import { IconClock, IconTag, IconTrash } from '$lib/components/icons';
 	import { t } from '$lib/i18n';
+	import { fmt } from '$lib/format/datetime';
 
 	interface Props {
 		container: StaleContainer;
@@ -24,11 +25,6 @@
 		`${container.project_name}-${container.stage_name}-${container.instance.image_tag}`
 	);
 
-	function formatDate(iso: string): string {
-		if (!iso) return '-';
-		const d = new Date(iso);
-		return d.toLocaleDateString(undefined, { month: 'short', day: 'numeric', year: 'numeric' });
-	}
 </script>
 
 <div class="rounded-xl border border-[var(--border-primary)] bg-[var(--surface-card)] p-5 shadow-[var(--shadow-sm)] transition-colors hover:bg-[var(--surface-card-hover)]">
@@ -63,7 +59,7 @@
 		</span>
 		<span class="inline-flex items-center gap-1">
 			<IconClock size={12} />
-			{$t('stale.lastAlive')}: {formatDate(container.instance.last_alive_at)}
+			{$t('stale.lastAlive')}: {$fmt.shortDate(container.instance.last_alive_at)}
 		</span>
 		<span class="rounded bg-[var(--surface-card-hover)] px-1.5 py-0.5 font-mono text-[10px]">
 			{container.instance.status}