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/composables/useOnboarding.ts

@@ -29,4 +29,15 @@ export async function isOnboardingComplete(): Promise<boolean> {
 export async function completeOnboarding(): Promise<void> {
   await callWithRetry(() => rpcClient.completeOnboarding(), 3)
   localStorage.setItem('neode_onboarding_complete', '1')
+  localStorage.removeItem('neode_onboarding_step')
+}
+
+/** Save current onboarding step so refresh resumes where user left off */
+export function saveOnboardingStep(step: string): void {
+  localStorage.setItem('neode_onboarding_step', step)
+}
+
+/** Get the last saved onboarding step, or 'intro' if none */
+export function getSavedOnboardingStep(): string {
+  return localStorage.getItem('neode_onboarding_step') || 'intro'
 }