chore(apps): remove six fake bookmark apps

484.kitchen, Arch Presentation, Call the Operator, Next Web News
Network, Syntropy Institute, and T-0 were hardcoded web-only bookmark
apps (no manifests/containers). Removed across the frontend app grid /
curated / marketplace / session / launcher data, the backend
AppMetadata table, their icons, and the nginx /ext/ proxy blocks
(external-app-proxies.conf deleted — nothing installed it anymore).
botfights/nostrudel/gitea keep the shared external-app code paths.

Frontend: vue-tsc clean, 672 tests pass, production build verified
clean of the removed slugs. Backend: cargo check clean.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/src/views/appSession/appSessionConfig.ts

@@ -45,12 +45,6 @@ export const HTTPS_PROXY_PATHS: Record<string, string> = {
 
 /** External HTTPS apps -- always loaded directly */
 export const EXTERNAL_URLS: Record<string, string> = {
-  'nwnn': 'https://nwnn.l484.com',
-  '484-kitchen': 'https://484.kitchen',
-  'call-the-operator': 'https://cta.tx1138.com',
-  'arch-presentation': 'https://present.l484.com',
-  'syntropy-institute': 'https://syntropy.institute',
-  't-zero': 'https://teeminuszero.net',
   'nostrudel': 'https://nostrudel.ninja',
 }
 
@@ -58,11 +52,10 @@ export const APP_TITLES: Record<string, string> = {
   ...GENERATED_APP_TITLES,
   'bitcoin-knots': 'Bitcoin Knots', 'bitcoin-core': 'Bitcoin Core',
   'btcpay-server': 'BTCPay Server', 'indeedhub': 'Indeehub',
-  'botfights': 'BotFights', 'gitea': 'Gitea', '484-kitchen': '484 Kitchen', 'arch-presentation': 'Presentation',
+  'botfights': 'BotFights', 'gitea': 'Gitea',
   'homeassistant': 'Home Assistant', 'uptime-kuma': 'Uptime Kuma',
   'nginx-proxy-manager': 'Nginx Proxy Manager',
-  'call-the-operator': 'Call The Operator', 'syntropy-institute': 'Syntropy Institute',
-  't-zero': 'T-Zero', 'nostrudel': 'noStrudel',
+  'nostrudel': 'noStrudel',
 }
 
 /** Apps that set X-Frame-Options and MUST open in a new tab (can't iframe) */