fix: indeedhub staging API, nginx caching, nostr identity and UI improvements

Switch IndeedHub to staging API, add _next asset caching in nginx,
simplify NostrIdentityPicker component, and update Apps/Web5/Marketplace views.

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

neode-ui/src/views/Marketplace.vue

@@ -654,8 +654,7 @@ const WEB_ONLY_APP_URLS: Record<string, string> = {
 /** App ID to port-based URL for container apps */
 const APP_LAUNCH_URLS: Record<string, string> = {
   'bitcoin-knots': 'http://localhost:8334',
-  'electrs': 'http://localhost:50002',
-  'btcpay-server': 'http://localhost:23000',
+'btcpay-server': 'http://localhost:23000',
   'lnd': 'http://localhost:8081',
   'mempool': 'http://localhost:4080',
   'homeassistant': 'http://localhost:8123',
@@ -732,7 +731,7 @@ async function loadCommunityMarketplace() {
 
 // Get app tier classification (matches backend get_app_tier)
 function getAppTier(appId: string): string {
-  const core = ['bitcoin-knots', 'bitcoin', 'lnd', 'mempool', 'electrs', 'btcpay-server', 'dwn', 'filebrowser']
+  const core = ['bitcoin-knots', 'bitcoin', 'lnd', 'mempool', 'btcpay-server', 'dwn', 'filebrowser']
   const recommended = ['fedimint', 'vaultwarden', 'uptime-kuma', 'grafana', 'searxng', 'tailscale', 'portainer']
   if (core.includes(appId)) return 'core'
   if (recommended.includes(appId)) return 'recommended'
@@ -753,17 +752,6 @@ function getCuratedAppList() {
       manifestUrl: undefined,
       repoUrl: 'https://github.com/bitcoinknots/bitcoin'
     },
-    {
-      id: 'electrs',
-      title: 'Electrs',
-      version: '0.4.1',
-      description: 'Electrum protocol indexer for Bitcoin. Powers Mempool and other Electrum clients. Requires Bitcoin Knots or Bitcoin Core.',
-      icon: '/assets/img/app-icons/electrs.svg',
-      author: 'Roman Zeyde',
-      dockerImage: 'docker.io/mempool/electrs:v0.4.1',
-      manifestUrl: undefined,
-      repoUrl: 'https://github.com/romanz/electrs'
-    },
     {
       id: 'btcpay-server',
       title: 'BTCPay Server',