* chore(deps): upgrade ESLint 9 → 10 with plugin compatibility fixes
- eslint: ^9 → ^10.0.0 (backend + frontend)
- @eslint/js: ^9 → ^10.0.0 (backend + frontend)
- eslint-plugin-react-refresh: ^0.4.24 → ^0.5.2 (ESM, config factory API)
- Update frontend eslint.config.js: destructured import for react-refresh,
call configs.vite() as factory function (0.5 API change)
- Downgrade new ESLint 10 rules (no-useless-assignment, preserve-caught-error)
to warnings for existing code patterns
- eslint-plugin-react-hooks stays at 7.0.1 (stable) with --legacy-peer-deps
until a stable release adds ESLint 10 peer support
* chore(deps): upgrade recharts 2.x to 3.8 with chart.tsx type fixes
recharts 3.x moved Tooltip/Legend props to context-based API.
Updated chart.tsx to use explicit prop interfaces with internal
recharts type imports (LegendPayload, TooltipPayload, TooltipFormatter).
* chore(deps): upgrade TypeScript 5.9 to 6.0
- Remove deprecated baseUrl from frontend tsconfig (paths works standalone in TS 6)
- Add react-is dependency required by recharts 3.x at build time
- Backend and frontend both compile and lint cleanly
* chore(deps): upgrade Vite 7.3 to 8.0 and @vitejs/plugin-react to 6.0
Vite 8 replaces Rollup+esbuild with Rolldown, significantly improving
build speed (~2s vs ~18s). No config changes required.
* fix(ci): add .npmrc with legacy-peer-deps for CI and Docker builds
typescript-eslint@8.x requires typescript <6.0.0 and
eslint-plugin-react-hooks@7.0.1 requires eslint <=9. Until upstream
packages release compatible versions, legacy-peer-deps is needed.
* docs: add logo assets and re-ignore CLAUDE.md
* fix(ci): copy .npmrc into prod-deps Docker stage
The prod-deps stage also runs npm ci with backend/package.json but was
missing the .npmrc needed to bypass peer dep conflicts.
Anso