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/views/Marketplace.vue

@@ -82,6 +82,10 @@
           <RouterLink to="/dashboard/apps?tab=services" class="mode-switcher-btn">Services</RouterLink>
         </div>
         <div class="mode-switcher flex-shrink-0">
+          <RouterLink
+            to="/dashboard/discover"
+            class="mode-switcher-btn"
+          >Discover</RouterLink>
           <button
             v-for="category in categoriesWithApps"
             :key="category.id"
@@ -131,7 +135,8 @@
           :data-controller-install="!(isInstalled(app.id) || installingApps.has(app.id)) && (app.source === 'local' || !!app.dockerImage) ? '1' : undefined"
           tabindex="0"
           role="link"
-          class="glass-card card-stagger p-6 hover:bg-white/10 transition-all cursor-pointer flex flex-col"
+          class="glass-card p-6 hover:bg-white/10 transition-all cursor-pointer flex flex-col"
+          :class="{ 'card-stagger': showStagger }"
           :style="{ '--stagger-index': index }"
           @click="viewAppDetails(app)"
           @keydown.enter="viewAppDetails(app)"
@@ -365,9 +370,13 @@
   </div>
 </template>
 
+<script lang="ts">
+let marketplaceAnimationDone = false
+</script>
+
 <script setup lang="ts">
 import { ref, computed, onMounted, onBeforeUnmount, watch } from 'vue'
-import { useRouter, RouterLink } from 'vue-router'
+import { useRouter, useRoute, RouterLink } from 'vue-router'
 import { useI18n } from 'vue-i18n'
 import { useAppStore } from '@/stores/app'
 import { rpcClient } from '@/api/rpc-client'
@@ -378,13 +387,16 @@ import { useModalKeyboard } from '@/composables/useModalKeyboard'
 type MarketplaceApp = Partial<MarketplaceAppInfo> & { id: string; trustScore?: number; trustTier?: string; relayCount?: number }
 
 const router = useRouter()
+const route = useRoute()
 const store = useAppStore()
 const { t } = useI18n()
+
+const showStagger = !marketplaceAnimationDone
 const { setCurrentApp } = useMarketplaceApp()
 const appLauncher = useAppLauncherStore()
 
-// Category state
-const selectedCategory = ref('all')
+// Category state — read initial value from query param (set by Discover page navigation)
+const selectedCategory = ref((route.query.category as string) || 'all')
 
 const categories = computed(() => [
   { id: 'all', name: t('marketplace.all') },
@@ -721,6 +733,7 @@ function launchInstalledApp(app: MarketplaceApp) {
 
 // Load community marketplace on mount
 onMounted(() => {
+  marketplaceAnimationDone = true
   if (communityApps.value.length === 0 && !loadingCommunity.value) {
     loadCommunityMarketplace()
   }