feat: unified THE FORGE // SECTION headers and merged proxy routes

UI consistency
- ForgeHero now supports backHref, mono kicker, stats snippet, staggered
  entrance animation, and a registration-tick divider
- Every route now opens with the same "THE FORGE // SECTION" eyebrow: projects,
  sites, stacks, proxies, events, dns, deploy, settings, stale containers,
  site/project detail + env/volumes/browse, new site wizard
- Stacks list/detail/new moved to the shared hero and brand-anchor eyebrow
- Toolbars migrated from bespoke buttons to the shared .forge-btn utilities
- Sidebar footline adds a live UTC "forge clock" and a vim-style g-prefix
  quick-nav hint (g d/p/s/k/x/r/e/c jumps to each section)

Proxies page
- Server-side: merge static site proxy routes with instance routes and sort
  by domain (internal/api/proxies.go, internal/store/static_sites.go)
- ProxyRoute gains a Source field ("instance" | "static_site")
- Frontend adds source filter tabs and per-source labels/badges

web/src/routes/containers/stale/+page.svelte

@@ -5,6 +5,7 @@
 	import ConfirmDialog from '$lib/components/ConfirmDialog.svelte';
 	import EmptyState from '$lib/components/EmptyState.svelte';
 	import SkeletonCard from '$lib/components/SkeletonCard.svelte';
+	import ForgeHero from '$lib/components/ForgeHero.svelte';
 	import { IconTrash, IconLoader } from '$lib/components/icons';
 	import { toasts } from '$lib/stores/toast';
 	import { t } from '$lib/i18n';
@@ -75,22 +76,27 @@
 </svelte:head>
 
 <div class="space-y-6">
-	<!-- Header -->
-	<div class="flex items-center justify-between">
-		<h1 class="text-2xl font-bold text-[var(--text-primary)]">{$t('stale.title')}</h1>
+	{#snippet heroToolbar()}
 		{#if containers.length > 0}
 			<button
 				type="button"
 				disabled={bulkCleaning}
 				onclick={() => { confirmBulk = true; }}
-				class="inline-flex items-center gap-2 rounded-lg border border-[var(--color-danger)] px-4 py-2.5 text-sm font-medium text-[var(--color-danger)] transition-colors hover:bg-[var(--color-danger-light)] disabled:opacity-50 active:animate-press"
+				class="forge-btn-ghost forge-btn-danger"
 			>
-				{#if bulkCleaning}<IconLoader size={16} />{/if}
-				<IconTrash size={16} />
-				{$t('stale.cleanupAll')}
+				{#if bulkCleaning}<IconLoader size={14} />{/if}
+				<IconTrash size={14} />
+				<span>{$t('stale.cleanupAll')}</span>
 			</button>
 		{/if}
-	</div>
+	{/snippet}
+	<ForgeHero
+		backHref="/"
+		eyebrowSuffix="STALE"
+		title={$t('stale.title')}
+		size="lg"
+		toolbar={heroToolbar}
+	/>
 
 	<!-- Content -->
 	{#if loading}