fix: rename Notification Routing to Routing in settings sidebar

frontend/src/components/settings/NotificationRoutingSection.tsx

@@ -297,7 +297,7 @@ export function NotificationRoutingSection() {
     );
 
     return (
-        <CapabilityGate capability="notification-routing" featureName="Notification Routing">
+        <CapabilityGate capability="notification-routing" featureName="Routing">
             <div className="space-y-6">
                 <div className="flex justify-end">
                     <SettingsPrimaryButton size="sm" onClick={() => { resetForm(); setShowForm(true); }}>

frontend/src/components/settings/__tests__/registry.test.ts

@@ -81,7 +81,7 @@ describe('settings registry', () => {
     it('applies the renamed section labels', () => {
         const byId = new Map(SETTINGS_ITEMS.map(i => [i.id, i]));
         expect(byId.get('notifications')?.label).toBe('Channels');
-        expect(byId.get('notification-routing')?.label).toBe('Notification Routing');
+        expect(byId.get('notification-routing')?.label).toBe('Routing');
     });
 
     it('no longer registers the standalone Vulnerability Scanning section (moved to the Security page)', () => {

frontend/src/components/settings/registry.ts

@@ -212,7 +212,7 @@ export const SETTINGS_ITEMS: readonly SettingsItemMeta[] = [
     {
         id: 'notification-routing',
         group: 'notifications',
-        label: 'Notification Routing',
+        label: 'Routing',
         description: 'Rules that steer alerts to the right channel based on severity or label.',
         keywords: ['rules', 'routing', 'channels', 'severity', 'labels'],
         tier: null,