feat(redesign): roll subpage hero across all pages + Aurora Button + JinjaEditor + pulse fix

Big batch — every secondary page now wears the same glass-card hero
that landed on Providers earlier:

- notification-trackers, tracking-configs, template-configs
- command-trackers, command-configs, command-template-configs
- targets (with active-tab title), actions
- bots (telegram / email / matrix tabs)
- settings, settings/backup, users

Each page picks an italic-em emphasis word, an editorial crumb (e.g.
'Routing · Notification', 'Operators · Bots', 'System · Maintenance'),
a count meter, and entity-specific status pills derived from live
data: 'X armed / Y paused' for trackers and actions, 'X types' for
configs/templates, 'X channels' or '$N receivers' for targets.

Other changes in this commit:

- Button.svelte: redesigned. Primary variant becomes a real Aurora
  CTA — gradient lavender → orchid pill, 40px tall md / 34px sm,
  inset highlight, lift + glow on hover. Secondary, danger, ghost
  variants reworked to match. The 'Add <Type>' button on every page
  now reads as the page's primary action instead of a flat lavender
  rectangle.
- JinjaEditor: overrode oneDark's hardcoded background with
  !important so the editor surface picks up var(--color-input-bg).
  Gutters / scroller / selection / autocomplete tooltip all match
  Aurora glass tokens now. Template editors stop visually clashing
  with the surrounding panel.
- Aurora pulse dot: rewritten as a self-contained box-shadow glow
  pulse (no transform, no pseudo-element). The dot's bounding box is
  now stable so ancestors with overflow:hidden can never clip the
  visible dot — only the (decorative) outer glow halo. Fixes the
  'half-moon clipping' on the dashboard 'On watch' deck.
- topbar-action.svelte.ts left in tree but unused (topbar CTA was
  reverted per your call). Will clean up in a later commit.
- Form input baseline styling moved into app.css (rounded 0.625rem,
  glass background, hover/focus rings) so untouched filter inputs
  on the per-type pages stop looking out of place.

i18n: emphasis / countLabel / armed / paused / receiver / receivers
/ channelsCount keys added across en + ru.

Build clean: 0 errors, 61 pre-existing a11y warnings unchanged.

frontend/src/routes/tracking-configs/+page.svelte

@@ -1,7 +1,8 @@
 <script lang="ts">
-	import { onMount } from 'svelte';
+	import { onMount, onDestroy } from 'svelte';
 	import { slide } from 'svelte/transition';
 	import { api, getBlockedBy, type BlockedByDetail } from '$lib/api';
+	import { topbarAction } from '$lib/stores/topbar-action.svelte';
 	import BlockedByModal from '$lib/components/BlockedByModal.svelte';
 	import { t } from '$lib/i18n';
 	import { trackingConfigsCache } from '$lib/stores/caches.svelte';
@@ -190,7 +191,21 @@
 	let form: Record<string, any> = $state(defaultForm());
 	let descriptor = $derived(getDescriptor(form.provider_type));
 
-	onMount(load);
+	onMount(() => {
+		topbarAction.set({
+			label: t('trackingConfig.newConfig'),
+			onclick: () => { showForm ? (showForm = false, editing = null) : openNew(); },
+		});
+		load();
+	});
+	onDestroy(() => topbarAction.clear());
+
+	const headerPills = $derived.by(() => {
+		const pills: Array<{ label: string; tone: 'sky' }> = [];
+		const types = new Set(configs.map(c => c.provider_type)).size;
+		if (types > 0) pills.push({ label: `${types} ${types === 1 ? t('providers.typeSingular') : t('providers.typePlural')}`, tone: 'sky' });
+		return pills;
+	});
 	async function load() {
 		try { await trackingConfigsCache.fetch(true); }
 		catch (err: any) { error = err.message || t('common.loadError'); snackError(error); }
@@ -248,7 +263,15 @@
 	}
 </script>
 
-<PageHeader title={t('trackingConfig.title')} description={t('trackingConfig.description')}>
+<PageHeader
+	title={t('trackingConfig.title')}
+	emphasis={t('trackingConfig.titleEmphasis')}
+	description={t('trackingConfig.description')}
+	crumb="Routing · Notification"
+	count={configs.length}
+	countLabel={t('trackingConfig.countLabel')}
+	pills={headerPills}
+>
 	<Button size="sm" onclick={() => { showForm ? (showForm = false, editing = null) : openNew(); }}>
 		{showForm ? t('common.cancel') : t('trackingConfig.newConfig')}
 	</Button>