# Architecture

`src/helpers` contains all framework-free production logic and is bundled as a
single tree-shakeable ESM entry with declaration files. `src/components` imports
that same root for the browser workspaces. React owns only ephemeral input and
presentation state.

The app uses the shared Toolbox shell, relative URLs, a small same-scope offline
service worker, and a static restrictive deployment model. There are no workers
in v0.1.0 because the bounded calculator operations are intentionally small;
cryptographic digests are asynchronous Web Crypto operations.

Application ZIP and npm package assembly are separate. The app includes the
shell and documentation. The npm package contains the library bundle,
declarations, API guide, source and security pointers, project licence and
third-party notices, but no React or Toolbox code in its executable bundle.