feat(archy): extend useArchy with wallet/files context, add ArchyAppsGrid component

- Add wallet (Lightning balance, channels) and files (Nextcloud) context
  categories to useArchy composable with AI prompt injection
- Create archy-apps.ts data file mapping all 18 Archy services
- Build ArchyAppsGrid component with live status from bridge
- Wire ArchyAppsGrid into ContentPanel when embedded in Archy

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/app/src/components/content/ContentPanel.vue

@@ -187,6 +187,9 @@
             :query="panelQuery"
             :hero-image="panelMagazineHeroImage ?? undefined"
           />
+          <ArchyAppsGrid
+            v-else-if="activeTab === 'app' && isArchyEmbedded"
+          />
           <AppsGrid
             v-else-if="activeTab === 'app'"
             :apps="panelApps"
@@ -233,6 +236,7 @@ import PdfViewer from '@/components/renderers/PdfViewer.vue'
 import MapRenderer from '@/components/renderers/MapRenderer.vue'
 import MagazineGrid from './MagazineGrid.vue'
 import AppsGrid from './AppsGrid.vue'
+import ArchyAppsGrid from './ArchyAppsGrid.vue'
 import AppDetail from './AppDetail.vue'
 import ProjectGrid from './ProjectGrid.vue'
 import NostrGrid from './NostrGrid.vue'
@@ -240,6 +244,7 @@ import FavoritesGrid from './FavoritesGrid.vue'
 import DiscoverPanel from './DiscoverPanel.vue'
 import ErrorBoundary from '@/components/ui/ErrorBoundary.vue'
 import { useFavoritesStore } from '@/stores/favorites'
+import { useArchy } from '@/composables/useArchy'
 
 // Film and song renderers loaded from plugin registry
 const filmRenderer = computed(() => getRendererForContentType('film'))
@@ -247,6 +252,7 @@ const songRenderer = computed(() => getRendererForContentType('song'))
 
 const { isDark } = useTheme()
 const favoritesStore = useFavoritesStore()
+const { isEmbedded: isArchyEmbedded } = useArchy()
 
 const {
   panelOpen,