- nginx-demo.conf + vite proxy now route every /app/<id>/ to the mock backend, so
the per-app mock UIs and the generic "Not available in the demo" notice render
(previously only /app/filebrowser was proxied → most apps 404'd).
- Mempool and IndeeHub now load in the in-app iframe (not a new tab).
- Add an LND Lightning mock UI (channels, balances, routing) with dummy data;
lnd/thunderhub are demoable. Notice page reworded to "Not available in the demo".
- Fix missing icons: Bitcoin Core → bitcoin-core.png, Mempool → mempool.webp.
- Pre-install only Bitcoin Core (drop duplicate Bitcoin Knots; still installable).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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