Items 1-5 of the agreed frontend upgrades. The one-time Prettier
reformatting of files not touched here is in the FOLLOW-UP commit so this
one stays reviewable.
Testing (vitest + @testing-library)
- vitest 3 + @testing-library/react + jsdom. test / test:watch / test:ui
scripts; setup.ts stubs matchMedia + ResizeObserver for AntD under jsdom.
- 15 tests, 4 files: RequireRole, LoginPage, measurements API client,
extractApiError.
Route-level code splitting
- Every page converted to React.lazy() behind a Suspense boundary in
App.tsx. Main bundle 1490 KB -> 714 KB; ECharts isolated in the
DashboardPage chunk and only fetched when a dashboard is opened.
Global 401 handling
- api/client.ts response interceptor redirects any 401 from a non-/auth
path to /login?returnTo=<current>; LoginPage honours the param.
- Shared extractApiError replaces four near-identical per-page copies
(UsersPage, AdminCustomersPage, MyProfilePage, TariffDrawer).
Query devtools
- @tanstack/react-query-devtools, lazy + import.meta.env.DEV-gated so a
production build dead-code-eliminates it. Verified: no devtools code in
any shipped .js chunk.
ESLint + Prettier
- ESLint 9 flat config (js + typescript-eslint + react-hooks +
react-refresh, eslint-config-prettier last). Prettier config tuned to
the existing style. lint / lint:fix / format / format:check scripts +
lint-staged config.
- Fixed one real react-hooks/exhaustive-deps warning (useMemo on
DashboardsPage's `dashboards`).
- End state: eslint 0 problems, tsc clean, 15/15 tests pass.
Pre-commit hook (lint-staged) is installed locally in .git/hooks/ -- not
version-controlled, see follow-up note. Husky was deliberately not used:
it needs a core.hooksPath change and the monorepo layout makes it awkward.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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