feat: add Discover page — cypherpunk app store with sovereignty messaging

- New Discover.vue with hero banner, featured sovereignty stack apps,
  principle cards, manifesto footer, and full app grid
- Featured apps (Bitcoin Knots, LND, BTCPay, Vaultwarden) with
  expanded privacy/sovereignty descriptions
- Discover is first tab in categories bar on App Store pages
- Smart back navigation: detail pages return to Discover when navigated from there
- Category clicks from Discover navigate to Marketplace with category pre-selected
- Cypherpunk aesthetic: terminal tags, scanline overlays, gradient accents,
  animated Bitcoin orange headings
- Global CSS classes: discover-hero, discover-terminal-tag, discover-featured-card,
  discover-principle-card, discover-manifesto
- Route added: /dashboard/discover

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/router/index.ts

@@ -98,6 +98,11 @@ const router = createRouter({
           name: 'lightning-channels',
           component: () => import('../views/apps/LightningChannels.vue'),
         },
+        {
+          path: 'discover',
+          name: 'discover',
+          component: () => import('../views/Discover.vue'),
+        },
         {
           path: 'marketplace',
           name: 'marketplace',
@@ -134,6 +139,11 @@ const router = createRouter({
           name: 'monitoring',
           component: () => import('../views/Monitoring.vue'),
         },
+        {
+          path: 'fleet',
+          name: 'fleet',
+          component: () => import('../views/Fleet.vue'),
+        },
         {
           path: 'server/federation',
           name: 'federation',