fix(demo): IndeeHub opens its real site — the same-origin proxy broke its assets

The nginx sub_filter rewrite couldn't touch the SPA's runtime-built asset
URLs, so the iframed IndeeHub rendered with broken links and images. The
real site refuses iframing (X-Frame-Options), so the demo now opens
https://indee.tx1138.com/ directly via the demo-external mechanism, whose
isDemoExternal() check was previously hardcoded off.

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

neode-ui/src/composables/useDemoIntro.ts

@@ -26,13 +26,17 @@ export function clearDemoIntroSeen(): void {
 // Only these apps actually do something in the demo (a mock UI or a real
 // external site). Everything else shows "No demo" on a disabled install button
 // and is not launchable.
-const DEMO_EXTERNAL_URLS: Record<string, string> = {}
+// IndeeHub's real site sends X-Frame-Options: SAMEORIGIN, and the old
+// same-origin nginx sub_filter proxy broke its runtime-built asset URLs —
+// so the demo opens the real site directly instead.
+const DEMO_EXTERNAL_URLS: Record<string, string> = {
+  indeedhub: 'https://indee.tx1138.com/',
+}
 
 // Apps loaded in the in-app iframe via a same-origin path. IndeeHub and Mempool
 // are reverse-proxied by nginx (X-Frame-Options/CSP stripped + asset paths
 // rewritten) so the frame-busting real sites can be embedded.
 const DEMO_MOCK_UI: Record<string, string> = {
-  indeedhub: '/app/indeedhub/',
   mempool: '/app/mempool/',
   'mempool-web': '/app/mempool/',
   'bitcoin-knots': '/app/bitcoin-knots/',
@@ -61,11 +65,11 @@ const DEMO_MOCK_UI: Record<string, string> = {
 }
 
 /**
- * Whether a demo app opens in a new tab. Nothing does — IndeeHub and Mempool
- * both load their real site directly in the in-app iframe.
+ * Whether a demo app opens externally (new tab / in-app browser) because its
+ * real site blocks iframing (X-Frame-Options).
  */
-export function isDemoExternal(_appId: string): boolean {
-  return false
+export function isDemoExternal(appId: string): boolean {
+  return appId in DEMO_EXTERNAL_URLS
 }
 
 /** Can this app be launched/installed in the demo? */