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/+layout.svelte

@@ -21,6 +21,7 @@
 		matrixBotsCache, targetsCache,
 	} from '$lib/stores/caches.svelte';
 	import { globalProviderFilter } from '$lib/stores/provider-filter.svelte';
+	import { topbarAction } from '$lib/stores/topbar-action.svelte';
 	import { providerDefaultIcon } from '$lib/grid-items';
 	import IconGridSelect from '$lib/components/IconGridSelect.svelte';
 
@@ -622,10 +623,6 @@
 						title={t('common.language')} aria-label={t('common.language')}>
 						<span class="topbar-locale font-mono">{getLocale().toUpperCase()}</span>
 					</button>
-					<a href="/notification-trackers" class="topbar-cta">
-						<NavIcon name="mdiPlus" size={14} />
-						<span>{t('dashboard.newTracker')}</span>
-					</a>
 				</div>
 			</div>