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/lib/components/Button.svelte

@@ -21,10 +21,10 @@
 		class?: string;
 	} = $props();
 
-	const baseClasses = 'inline-flex items-center justify-center gap-1.5 rounded-md text-sm font-medium transition-colors disabled:opacity-50';
+	const baseClasses = 'aurora-btn inline-flex items-center justify-center gap-2 font-medium transition-all disabled:opacity-50 disabled:pointer-events-none';
 	const sizeClasses: Record<string, string> = {
-		sm: 'px-2.5 py-1 text-xs',
-		md: 'px-4 py-2',
+		sm: 'aurora-btn--sm',
+		md: 'aurora-btn--md',
 	};
 	const variantClasses: Record<string, string> = {
 		primary: 'btn-primary',
@@ -49,37 +49,72 @@
 {/if}
 
 <style>
-	.btn-primary {
-		background: var(--color-primary);
-		color: var(--color-primary-foreground);
+	.aurora-btn {
+		border-radius: 12px;
+		letter-spacing: -0.005em;
+		cursor: pointer;
+		font-family: inherit;
+		white-space: nowrap;
 	}
-	.btn-primary:hover:not(:disabled) {
-		opacity: 0.9;
+	.aurora-btn--sm {
+		padding: 0 0.95rem;
+		height: 34px;
+		font-size: 0.82rem;
+	}
+	.aurora-btn--md {
+		padding: 0 1.15rem;
+		height: 40px;
+		font-size: 0.875rem;
 	}
 
+	/* Primary — gradient lavender→orchid pill, the page's main CTA. */
+	.btn-primary {
+		background: linear-gradient(135deg, var(--color-primary), var(--color-orchid));
+		color: white;
+		border: 0;
+		box-shadow:
+			0 6px 20px -8px var(--color-glow-strong),
+			inset 0 1px 0 rgba(255, 255, 255, 0.35);
+		font-weight: 600;
+	}
+	.btn-primary:hover:not(:disabled) {
+		transform: translateY(-1px);
+		box-shadow:
+			0 10px 28px -10px var(--color-glow-strong),
+			inset 0 1px 0 rgba(255, 255, 255, 0.4);
+	}
+	.btn-primary:active:not(:disabled) { transform: translateY(0); }
+
 	.btn-secondary {
-		background: var(--color-muted);
+		background: var(--color-glass-strong);
 		color: var(--color-foreground);
-		border: 1px solid var(--color-border);
+		border: 1px solid var(--color-rule-strong);
 	}
 	.btn-secondary:hover:not(:disabled) {
-		opacity: 0.8;
+		background: var(--color-glass-elev);
+		border-color: var(--color-rule-strong);
 	}
 
 	.btn-danger {
 		background: var(--color-error-fg);
 		color: white;
+		border: 0;
+		font-weight: 600;
+		box-shadow: 0 6px 20px -8px color-mix(in srgb, var(--color-error-fg) 50%, transparent);
 	}
 	.btn-danger:hover:not(:disabled) {
-		opacity: 0.9;
+		transform: translateY(-1px);
+		box-shadow: 0 10px 28px -10px color-mix(in srgb, var(--color-error-fg) 60%, transparent);
 	}
 
 	.btn-ghost {
 		background: transparent;
 		color: var(--color-muted-foreground);
+		border: 1px solid transparent;
 	}
 	.btn-ghost:hover:not(:disabled) {
-		background: var(--color-muted);
+		background: var(--color-glass-strong);
 		color: var(--color-foreground);
+		border-color: var(--color-border);
 	}
 </style>