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>

app-catalog/catalog.json

@@ -110,14 +110,6 @@
       "dockerImage": "git.tx1138.com/lfg2025/searxng:latest",
       "repoUrl": "https://github.com/searxng/searxng"
     },
-    {
-      "id": "nostr-rs-relay", "title": "Nostr Relay", "version": "0.9.0",
-      "description": "Your own Nostr relay. Store events locally, relay for friends.",
-      "icon": "/assets/img/app-icons/nostr-rs-relay.svg",
-      "author": "scsiblade", "category": "nostr",
-      "dockerImage": "git.tx1138.com/lfg2025/nostr-rs-relay:0.9.0",
-      "repoUrl": "https://sr.ht/~gheartsfield/nostr-rs-relay/"
-    },
     {
       "id": "fedimint", "title": "Fedimint", "version": "0.10.0",
       "description": "Federated Bitcoin mint with privacy through federated guardians.",
@@ -190,30 +182,6 @@
       "dockerImage": "git.tx1138.com/lfg2025/uptime-kuma:1",
       "repoUrl": "https://github.com/louislam/uptime-kuma"
     },
-    {
-      "id": "nostr-vpn", "title": "Nostr VPN", "version": "0.3.7",
-      "description": "Tailscale-style mesh VPN with Nostr control plane.",
-      "icon": "/assets/img/app-icons/nostr-vpn.svg",
-      "author": "Martti Malmi", "category": "networking",
-      "dockerImage": "git.tx1138.com/lfg2025/nostr-vpn:v0.3.7",
-      "repoUrl": "https://github.com/mmalmi/nostr-vpn"
-    },
-    {
-      "id": "fips", "title": "FIPS", "version": "0.1.0",
-      "description": "Free Internetworking Peering System. Encrypted mesh network.",
-      "icon": "/assets/img/app-icons/fips.svg",
-      "author": "Jim Corgan", "category": "networking",
-      "dockerImage": "git.tx1138.com/lfg2025/fips:v0.1.0",
-      "repoUrl": "https://github.com/jmcorgan/fips"
-    },
-    {
-      "id": "routstr", "title": "Routstr", "version": "0.4.3",
-      "description": "Decentralized AI inference proxy with Cashu ecash.",
-      "icon": "/assets/img/app-icons/routstr.svg",
-      "author": "Routstr", "category": "community",
-      "dockerImage": "git.tx1138.com/lfg2025/routstr:v0.4.3",
-      "repoUrl": "https://github.com/routstr/routstr-core"
-    },
     {
       "id": "dwn", "title": "Decentralized Web Node", "version": "0.4.0",
       "description": "Own your data with DID-based access control.",
@@ -230,14 +198,6 @@
       "dockerImage": "git.tx1138.com/lfg2025/endurain:0.8.0",
       "repoUrl": "https://github.com/joaovitoriasilva/endurain"
     },
-    {
-      "id": "penpot", "title": "Penpot", "version": "2.4",
-      "description": "Open-source design platform. Self-hosted Figma alternative.",
-      "icon": "/assets/img/app-icons/penpot.webp",
-      "author": "Penpot", "category": "data",
-      "dockerImage": "git.tx1138.com/lfg2025/penpot-frontend:2.4",
-      "repoUrl": "https://github.com/penpot/penpot"
-    },
     {
       "id": "photoprism", "title": "PhotoPrism", "version": "240915",
       "description": "AI-powered photo management with facial recognition.",