* fix(nix): enable sandboxed builds with bun2nix
The Nix package was broken on Linux because `bun install` requires
network access, which is blocked by Nix sandboxing (enabled by default
on Linux).
This switches to bun2nix for dependency management:
- Add bun2nix flake input to pre-fetch all npm dependencies
- Generate bun.nix lockfile for reproducible dependency resolution
- Copy bun cache to writable location during build to avoid EACCES
errors from bunx writing to the read-only Nix store
- Add nanoid as an explicit dependency (was imported directly but only
available as a transitive dep, which breaks with isolated linker)
- Update CI workflow to perform a full sandboxed build
- Add bun2nix to devShell for easy lockfile regeneration
Closes#197
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix(nix): create writable workdir for database access
The app uses process.cwd()/data for the database path, but when running
from the Nix store the cwd is read-only. Create a writable working
directory with symlinks to app files and a real data directory.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
bun install requires network access which Nix sandbox blocks.
CI now validates flake structure and evaluates expressions only.
Full builds work locally with: nix build --option sandbox false
- Use DeterminateSystems/nix-installer-action for Nix installation
- Use DeterminateSystems/magic-nix-cache-action for caching (free, no setup)
- Update documentation to remove Cachix references
- Add nix branch to CI triggers
