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/JinjaEditor.svelte

@@ -84,23 +84,54 @@
 				}
 			}),
 			EditorView.lineWrapping,
-			EditorView.theme({
-				'&': { fontSize: '13px', fontFamily: "'Consolas', 'Monaco', 'Courier New', monospace" },
-				'.cm-content': { minHeight: `${rows * 1.5}em`, padding: '8px' },
-				'.cm-editor': { borderRadius: '0.375rem', border: '1px solid var(--color-border)' },
-				'.cm-focused': { outline: '2px solid var(--color-primary)', outlineOffset: '0px' },
-				'.cm-error-line': { backgroundColor: 'rgba(239, 68, 68, 0.2)', outline: '1px solid rgba(239, 68, 68, 0.4)' },
-				'.ͼc': { color: '#e879f9' },
-				'.ͼd': { color: '#38bdf8' },
-				'.ͼ5': { color: '#6b7280' },
-				'.cm-tooltip-autocomplete': {
-					border: '1px solid var(--color-border)',
-					borderRadius: '0.375rem',
-					fontSize: '12px',
-				},
-			}),
 		];
+		// Apply oneDark first so its syntax-token colors are kept,
+		// then override with our Aurora-aware theme so background,
+		// borders, and gutters match the rest of the design.
 		if (isDark) extensions.push(oneDark);
+		extensions.push(EditorView.theme({
+			'&': {
+				fontSize: '13px',
+				fontFamily: 'var(--font-mono)',
+				backgroundColor: 'var(--color-input-bg) !important',
+				borderRadius: '14px',
+				border: '1px solid var(--color-rule-strong)',
+				color: 'var(--color-foreground)',
+				overflow: 'hidden',
+			},
+			'.cm-editor': { backgroundColor: 'transparent !important', borderRadius: '14px' },
+			'.cm-scroller': { backgroundColor: 'transparent !important' },
+			'.cm-content': { minHeight: `${rows * 1.5}em`, padding: '12px 14px', caretColor: 'var(--color-primary)' },
+			'.cm-gutters': {
+				backgroundColor: 'transparent',
+				color: 'var(--color-muted-foreground)',
+				borderRight: '1px solid var(--color-border)',
+			},
+			'.cm-activeLineGutter': { backgroundColor: 'var(--color-glass-strong)' },
+			'.cm-activeLine': { backgroundColor: 'var(--color-glass-strong)' },
+			'.cm-cursor': { borderLeftColor: 'var(--color-primary)' },
+			'.cm-selectionBackground, ::selection': { backgroundColor: 'var(--color-glass-elev) !important' },
+			'&.cm-focused .cm-selectionBackground': { backgroundColor: 'var(--color-glow) !important' },
+			'.cm-focused': { outline: 'none' },
+			'&.cm-focused': { borderColor: 'var(--color-primary)', boxShadow: '0 0 0 3px var(--color-glow)' },
+			'.cm-error-line': { backgroundColor: 'rgba(255, 138, 120, 0.18)', outline: '1px solid rgba(255, 138, 120, 0.4)' },
+			'.ͼc': { color: 'var(--color-orchid)' },
+			'.ͼd': { color: 'var(--color-sky)' },
+			'.ͼ5': { color: 'var(--color-muted-foreground)' },
+			'.cm-tooltip-autocomplete': {
+				background: 'color-mix(in srgb, var(--color-background) 92%, transparent)',
+				backdropFilter: 'blur(28px) saturate(160%)',
+				border: '1px solid var(--color-rule-strong)',
+				borderRadius: '12px',
+				fontSize: '12px',
+				boxShadow: '0 12px 30px -12px rgba(0,0,0,0.4)',
+				overflow: 'hidden',
+			},
+			'.cm-tooltip-autocomplete > ul > li[aria-selected]': {
+				backgroundColor: 'var(--color-glass-elev)',
+				color: 'var(--color-primary)',
+			},
+		}));
 		if (placeholder) extensions.push(cmPlaceholder(placeholder));
 		return extensions;
 	}