fix: onboarding persistence, clipboard, install UI, OnlyOffice removal, UI containers

Onboarding:
- Persist current step in localStorage — page refresh resumes where user was
- Router afterEach saves step; guard redirects to saved step, not always intro
- Show npub alongside DID on restore success screen

UI fixes:
- Clipboard polyfill for HTTP contexts (fixes Copy DID crash on non-HTTPS)
- AppCard installing overlay shows for pkg.state=installing (survives refresh)
- Hide uninstall button during installation
- Frontend version bumped to 1.3.2

App store:
- OnlyOffice fully removed from marketplace, curated apps, app config
- Replaced with CryptPad references throughout
- Remove OnlyOffice from ISO capture patterns

Container stability:
- UI containers (bitcoin-ui, lnd-ui, electrs-ui) pull from registry first
- Added --cap-add FOWNER for rootless Podman compatibility
- electrs-ui now included in first-boot loop alongside bitcoin-ui and lnd-ui

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

neode-ui/src/views/apps/AppCard.vue

@@ -10,17 +10,17 @@
     @click="$emit('goToApp', id)"
     @keydown.enter="handleEnter"
   >
-    <!-- Installing overlay -->
+    <!-- Installing overlay — shown for both client-tracked installs and backend 'installing' state -->
     <div
-      v-if="isInstalling"
+      v-if="isInstalling || pkg.state === 'installing'"
       class="absolute inset-0 z-20 flex items-center justify-center bg-black/70 backdrop-blur-sm rounded-xl"
     >
-      <div class="flex items-center gap-3 text-white/90">
-        <svg class="animate-spin h-5 w-5" fill="none" viewBox="0 0 24 24">
+      <div class="flex flex-col items-center gap-3 text-white/90">
+        <svg class="animate-spin h-6 w-6" fill="none" viewBox="0 0 24 24">
           <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
           <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
         </svg>
-        <span class="text-sm font-medium">Installing</span>
+        <span class="text-sm font-medium">{{ installProgress?.message || 'Installing...' }}</span>
       </div>
     </div>
 
@@ -40,7 +40,7 @@
 
     <!-- Uninstall Icon (not for web-only apps) -->
     <button
-      v-if="!isWebOnly && !isUninstalling"
+      v-if="!isWebOnly && !isUninstalling && !isInstalling && pkg.state !== 'installing'"
       @click.stop="$emit('showUninstall', id, pkg)"
       class="absolute top-4 right-4 p-2 rounded-lg text-white/60 hover:text-red-400 hover:bg-red-500/20 transition-colors z-10"
       :aria-label="`${t('common.uninstall')} ${pkg.manifest?.title || id}`"