Added onboarding + a lightweight install banner to both the mobile login screen and the settings screen, with Android/Chromium

install prompt support and iOS “Share → Add to Home Screen” guidance. Also added a small helper + tests to decide
  when/which banner variant should show, and shared copy in common.json.

resources/js/admin/mobile/NotificationsPage.tsx

@@ -550,9 +550,18 @@ export default function MobileNotificationsPage() {
       ) : statusFiltered.length === 0 ? (
         <MobileCard alignItems="center" justifyContent="center" space="$2">
           <Bell size={24} color={String(theme.gray9?.val ?? '#9ca3af')} />
-          <Text fontSize="$sm" color={muted}>
-            {t('mobileNotifications.empty', 'Keine Benachrichtigungen vorhanden.')}
+          <Text fontSize="$sm" fontWeight="700" color={text}>
+            {t('mobileNotifications.emptyTitle', 'All caught up')}
           </Text>
+          <Text fontSize="$xs" color={muted} textAlign="center">
+            {t('mobileNotifications.emptyBody', 'Enable push to receive alerts about uploads, guests, and expiring galleries.')}
+          </Text>
+          <CTAButton
+            label={t('mobileNotifications.emptyAction', 'Check notification settings')}
+            tone="ghost"
+            fullWidth={false}
+            onPress={() => navigate(adminPath('/mobile/settings'))}
+          />
         </MobileCard>
       ) : (
         <YStack space="$2">