src/web/public is plain <script> files with no imports, so knip cannot
follow it and ESLint does not cover it; leftovers there went unnoticed
until this cleanup. `npm run check:frontend-dead` is the counterpart of
`npm run knip` for that tree:
- JavaScript: every function, method and top-level binding, counted
against the identifiers and string literals of the frontend files,
index.html (inline handlers), the gesture overlay's source and the
tests. A name with no reference but its own definition fails the check.
- CSS: every class and id of styles.css and mobile.css against the same
text. A class built at runtime is recognised by its prefix or suffix.
- `--production` also lists what only tests reference.
It parses with the TypeScript compiler and PostCSS, both already dev
dependencies. Clean on this tree; run against the tree before the
cleanup it reports the 28 functions and 43 selectors that were removed.
On demand for now, not a CI step.
Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
