No workspace_fs.node for linux-x64.

node-gyp rebuild exited 1. A C toolchain and Python are required (Xcode CLT on macOS, MSVC Build Tools on Windows).

Rebuild with:
  npm run build:workspace-fs --workspace @0x-copilot/desktop

Without this binary the confined read on Windows and Linux uses a
post-open realpath recheck, which denies the same escapes but NOT
atomically. index.cjs refuses the read outright in a production install
rather than serving it through that race.
