v0.4.20

0.4.20 — 2026-06-30

Upgrade notes for admins

• None. This release only adds a frontend test suite and its CI wiring; the
  running application is unaffected (no migrations, no new runtime env vars).
  The new dependencies are dev-only and excluded from the production build.

Added

• Vitest + React Testing Library for the frontend/ SPA, mirroring the
  backend's pytest gate. Test files live colocated as src/**/*.test.ts(x),
  run via npm run test (with test:watch / test:coverage scripts), and are
  now part of the frontend CI job (lint → types → tests) and a vitest
  pre-commit hook. The frontend was previously never tested in CI.
• Shared test helpers under src/test/ (setup.ts registers jest-dom matchers
  and auto-cleanup; utils.tsx exposes renderWithProviders wrapping the
  TanStack Query client + router).
• Initial coverage: pure-logic unit tests for the tether bezier geometry, the
  tether constants/localStorage helpers, the [[wikilink]] remark transform,
  and the API fetch client (CSRF header + DRF error parsing); plus sample
  component tests for ChatComposer and LoginPage as patterns to copy.

Changed

• frontend/vite.config.ts now also carries the Vitest config (jsdom
  environment, setup file, report-only v8 coverage). No coverage gate yet — to
  be ratcheted up once the suite matures, mirroring the backend's fail_under.