- demo/files/<Folder>/<file> becomes the cloud's content for every visitor
(read-only; "private login" = git/repo access). Text inlined, binaries streamed
from disk; empty folder falls back to the built-in seeded set.
- Dockerfile.backend now copies docker/bitcoin-ui and demo/files into the image
(they live outside neode-ui/) — this also fixes the Bitcoin UI mock, which the
backend reads from /docker/bitcoin-ui and was previously absent in the container.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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