release(v1.7.38-alpha): onboarding auto-heal + silent returning logins + app-store trim

- auth.rs now infers onboarding-complete from setup_complete + password_hash so
  nodes stop bouncing users through the intro wizard after browser clear / update
  / reboot; the flag self-heals to disk on next check
- frontend: "backend uncertain" no longer defaults to /onboarding/intro —
  useOnboarding returns null + callers poll / retry instead of flashing the wizard
- login sounds (synthwave, welcome voice, pop, whoosh, oomph) gated by
  isFirstInstallPhase(); typing sounds unaffected
- removed FIPS app, Nostr Relay, Nostr VPN, Routstr, Penpot from catalog,
  frontend config, Rust AppMetadata + install dispatch + install_penpot_stack;
  docker/fips-ui + docker/nostr-vpn-ui + apps/penpot dirs and 5 icons deleted;
  15 image versions deleted from tx1138, .168, gitea-local registries (.160
  Gitea was 502 at release time — follow-up)
- AIUI baked into frontend release tarball via demo/aiui/; deploy-to-target
  falls back to demo/aiui/ when the AIUI sibling checkout is missing
- prebuild hook syncs app-catalog/catalog.json → public/catalog.json so the
  two copies can no longer drift (was the source of the "apps still visible"
  bug — public/ had stale data)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

neode-ui/package.json

@@ -1,7 +1,7 @@
 {
   "name": "neode-ui",
   "private": true,
-  "version": "1.7.37-alpha",
+  "version": "1.7.38-alpha",
   "type": "module",
   "scripts": {
     "start": "./start-dev.sh",
@@ -14,6 +14,7 @@
     "dev:real": "echo 'Start backend: cd ../core && cargo run --release' && vite",
     "backend:mock": "node mock-backend.js",
     "backend:real": "cd ../core && cargo run --release",
+    "prebuild": "cp ../app-catalog/catalog.json public/catalog.json",
     "build": "vue-tsc -b && vite build",
     "build:docker": "vite build",
     "build:production": "NODE_ENV=production vue-tsc -b && vite build --mode production",