- eslint.config.mjs: flat config built on eslint-config-next's flat array
(core-web-vitals + typescript + Next plugin), with build/generated artifacts
ignored and the aggressive react-hooks v6 React-Compiler rules downgraded to
warnings so `pnpm run lint` passes clean (0 errors, 88 warnings of burn-down
debt) instead of failing. Previously `eslint .` failed outright — no config
and no eslint binary were installed.
- Install eslint, @eslint/js, eslint-config-next, typescript-eslint, globals as
devDeps (dev-only; prod Docker build is unaffected).
- package.json: add `typecheck` (tsc --noEmit) and `test:run` scripts.
- app/not-found.tsx: escape apostrophes (react/no-unescaped-entities).
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
