fix(demo-ui): demoable apps launch in-frame; 'Not available in demo' label

- Register the 8 new placeholder apps in DEMO_MOCK_UI so they're launchable
  and installable in the demo.
- Demo bypasses the new-tab/tab-launch lists for demoable apps — they're
  served same-origin by the mock backend with no framing headers, so they
  render in the in-app session instead of opening broken localhost tabs.
- Non-demoable apps now say 'Not available in demo' instead of 'No demo'.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/src/composables/useDemoIntro.ts

@@ -75,6 +75,15 @@ const DEMO_MOCK_UI: Record<string, string> = {
   fedimint: '/app/fedimint/',
   fedimintd: '/app/fedimint/',
   filebrowser: '/app/filebrowser/',
+  // Static placeholder dashboards served by the mock backend (DEMO_APP_PAGES).
+  'btcpay-server': '/app/btcpay-server/',
+  grafana: '/app/grafana/',
+  nextcloud: '/app/nextcloud/',
+  jellyfin: '/app/jellyfin/',
+  vaultwarden: '/app/vaultwarden/',
+  'nostr-rs-relay': '/app/nostr-rs-relay/',
+  searxng: '/app/searxng/',
+  'uptime-kuma': '/app/uptime-kuma/',
 }
 
 /**

neode-ui/src/views/Apps.vue

@@ -404,6 +404,7 @@ import {
   buildServiceCategories, useServiceCategories,
 } from './apps/appsConfig'
 import { getCuratedAppList, INSTALLED_ALIASES, type MarketplaceApp } from './marketplace/marketplaceData'
+import { IS_DEMO, isDemoApp } from '@/composables/useDemoIntro'
 
 const { t } = useI18n()
 const router = useRouter()
@@ -633,7 +634,9 @@ function launchAppNow(id: string) {
     }
     return
   }
-  if (!isMobile && pkg && opensInTab(id)) {
+  // Demo: demoable apps are served same-origin by the mock backend, so the
+  // tab-launch list (real apps with framing headers) doesn't apply.
+  if (!isMobile && pkg && opensInTab(id) && !(IS_DEMO && isDemoApp(id))) {
     const url = resolveRuntimeLaunchUrl(pkg)
     if (url) {
       window.open(url, '_blank', 'noopener,noreferrer')

neode-ui/src/views/MarketplaceAppDetails.vue

@@ -85,7 +85,7 @@
               <svg v-else class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4" />
               </svg>
-              {{ demoNoInstall ? 'No demo' : installBlockedReason ? 'Bitcoin Pruned' : installing ? t('common.installing') : t('common.install') }}
+              {{ demoNoInstall ? 'Not available in demo' : installBlockedReason ? 'Bitcoin Pruned' : installing ? t('common.installing') : t('common.install') }}
             </button>
           </div>
         </div>
@@ -164,7 +164,7 @@
               <svg v-else class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4" />
               </svg>
-              {{ demoNoInstall ? 'No demo' : installBlockedReason ? 'Bitcoin Pruned' : installing ? t('common.installing') : t('common.install') }}
+              {{ demoNoInstall ? 'Not available in demo' : installBlockedReason ? 'Bitcoin Pruned' : installing ? t('common.installing') : t('common.install') }}
             </button>
           </div>
 
@@ -517,7 +517,7 @@ const installBlockedReason = computed(() => {
   return electrumxArchiveWarning
 })
 
-// Demo: only demoable apps can be installed; the rest show "No demo".
+// Demo: only demoable apps can be installed; the rest show "Not available in demo".
 const demoNoInstall = computed(() => IS_DEMO && !!app.value?.id && !isDemoApp(app.value.id))
 
 let pendingRedirect: ReturnType<typeof setTimeout> | null = null

neode-ui/src/views/discover/AppGrid.vue

@@ -121,7 +121,7 @@
             v-else-if="IS_DEMO && !isInstalled(app.id) && !isDemoApp(app.id)"
             disabled
             class="flex-1 px-4 py-2 bg-white/10 rounded-lg text-white/40 text-sm font-medium cursor-not-allowed"
-          >No demo</button>
+          >Not available in demo</button>
           <!-- Install button -->
           <button
             v-else-if="!isInstalled(app.id) && (app.source === 'local' || app.dockerImage)"

neode-ui/src/views/discover/FeaturedApps.vue

@@ -78,7 +78,7 @@
             v-else-if="IS_DEMO && !isInstalled(app.id) && !isDemoApp(app.id)"
             disabled
             class="glass-button glass-button-sm rounded-lg text-sm font-medium opacity-50 cursor-not-allowed"
-          >No demo</button>
+          >Not available in demo</button>
           <button
             v-else-if="!isInstalled(app.id) && app.dockerImage"
             data-controller-install-btn